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Merge pull request #21140 from jacobly0/self-dwarf

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Dwarf: inline calls progress
This commit is contained in:
Jacob Young 2024-08-20 18:41:26 -04:00 committed by GitHub
commit 16d74809d4
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30 changed files with 1236 additions and 698 deletions
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25
src/Air.zig
View File

@ -456,6 +456,8 @@ pub const Inst = struct {
/// Same as `dbg_var_ptr` except the local is a const, not a var, and the
/// operand is the local's value.
dbg_var_val,
/// Same as `dbg_var_val` except the local is an inline function argument.
dbg_arg_inline,
/// ?T => bool
/// Result type is always bool.
/// Uses the `un_op` field.
@ -1022,10 +1024,7 @@ pub const Inst = struct {
ty: Ref,
/// Index into `extra` of a null-terminated string representing the parameter name.
/// This is `.none` if debug info is stripped.
name: enum(u32) {
none = std.math.maxInt(u32),
_,
},
name: NullTerminatedString,
},
ty_op: struct {
ty: Ref,
@ -1440,6 +1439,7 @@ pub fn typeOfIndex(air: *const Air, inst: Air.Inst.Index, ip: *const InternPool)
.dbg_stmt,
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
.store,
.store_safe,
.fence,
@ -1562,14 +1562,16 @@ pub fn value(air: Air, inst: Inst.Ref, pt: Zcu.PerThread) !?Value {
return air.typeOfIndex(index, &pt.zcu.intern_pool).onePossibleValue(pt);
}
pub fn nullTerminatedString(air: Air, index: usize) [:0]const u8 {
const bytes = std.mem.sliceAsBytes(air.extra[index..]);
var end: usize = 0;
while (bytes[end] != 0) {
end += 1;
pub const NullTerminatedString = enum(u32) {
none = std.math.maxInt(u32),
_,
pub fn toSlice(nts: NullTerminatedString, air: Air) [:0]const u8 {
if (nts == .none) return "";
const bytes = std.mem.sliceAsBytes(air.extra[@intFromEnum(nts)..]);
return bytes[0..std.mem.indexOfScalar(u8, bytes, 0).? :0];
}
return bytes[0..end :0];
}
};
/// Returns whether the given instruction must always be lowered, for instance
/// because it can cause side effects. If an instruction does not need to be
@ -1596,6 +1598,7 @@ pub fn mustLower(air: Air, inst: Air.Inst.Index, ip: *const InternPool) bool {
.dbg_inline_block,
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
.ret,
.ret_safe,
.ret_load,

1
src/Air/types_resolved.zig
View File

@ -339,6 +339,7 @@ fn checkBody(air: Air, body: []const Air.Inst.Index, zcu: *Zcu) bool {
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> {
if (!checkRef(data.pl_op.operand, zcu)) return false;
},

28
src/Compilation.zig
View File

@ -2997,14 +2997,26 @@ pub fn saveState(comp: *Compilation) !void {
addBuf(&bufs, mem.sliceAsBytes(ip.free_dep_entries.items));
for (ip.locals, pt_headers.items) |*local, pt_header| {
addBuf(&bufs, mem.sliceAsBytes(local.shared.limbs.view().items(.@"0")[0..pt_header.intern_pool.limbs_len]));
addBuf(&bufs, mem.sliceAsBytes(local.shared.extra.view().items(.@"0")[0..pt_header.intern_pool.extra_len]));
addBuf(&bufs, mem.sliceAsBytes(local.shared.items.view().items(.data)[0..pt_header.intern_pool.items_len]));
addBuf(&bufs, mem.sliceAsBytes(local.shared.items.view().items(.tag)[0..pt_header.intern_pool.items_len]));
addBuf(&bufs, local.shared.strings.view().items(.@"0")[0..pt_header.intern_pool.string_bytes_len]);
addBuf(&bufs, mem.sliceAsBytes(local.shared.tracked_insts.view().items(.@"0")[0..pt_header.intern_pool.tracked_insts_len]));
addBuf(&bufs, mem.sliceAsBytes(local.shared.files.view().items(.bin_digest)[0..pt_header.intern_pool.files_len]));
addBuf(&bufs, mem.sliceAsBytes(local.shared.files.view().items(.root_type)[0..pt_header.intern_pool.files_len]));
if (pt_header.intern_pool.limbs_len > 0) {
addBuf(&bufs, mem.sliceAsBytes(local.shared.limbs.view().items(.@"0")[0..pt_header.intern_pool.limbs_len]));
}
if (pt_header.intern_pool.extra_len > 0) {
addBuf(&bufs, mem.sliceAsBytes(local.shared.extra.view().items(.@"0")[0..pt_header.intern_pool.extra_len]));
}
if (pt_header.intern_pool.items_len > 0) {
addBuf(&bufs, mem.sliceAsBytes(local.shared.items.view().items(.data)[0..pt_header.intern_pool.items_len]));
addBuf(&bufs, mem.sliceAsBytes(local.shared.items.view().items(.tag)[0..pt_header.intern_pool.items_len]));
}
if (pt_header.intern_pool.string_bytes_len > 0) {
addBuf(&bufs, local.shared.strings.view().items(.@"0")[0..pt_header.intern_pool.string_bytes_len]);
}
if (pt_header.intern_pool.tracked_insts_len > 0) {
addBuf(&bufs, mem.sliceAsBytes(local.shared.tracked_insts.view().items(.@"0")[0..pt_header.intern_pool.tracked_insts_len]));
}
if (pt_header.intern_pool.files_len > 0) {
addBuf(&bufs, mem.sliceAsBytes(local.shared.files.view().items(.bin_digest)[0..pt_header.intern_pool.files_len]));
addBuf(&bufs, mem.sliceAsBytes(local.shared.files.view().items(.root_type)[0..pt_header.intern_pool.files_len]));
}
}
//// TODO: compilation errors

2
src/Liveness.zig
View File

@ -464,6 +464,7 @@ pub fn categorizeOperand(
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> {
const o = air_datas[@intFromEnum(inst)].pl_op.operand;
if (o == operand_ref) return matchOperandSmallIndex(l, inst, 0, .none);
@ -1097,6 +1098,7 @@ fn analyzeInst(
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> {
const operand = inst_datas[@intFromEnum(inst)].pl_op.operand;
return analyzeOperands(a, pass, data, inst, .{ operand, .none, .none });

1
src/Liveness/Verify.zig
View File

@ -157,6 +157,7 @@ fn verifyBody(self: *Verify, body: []const Air.Inst.Index) Error!void {
},
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
.wasm_memory_grow,
=> {
const pl_op = data[@intFromEnum(inst)].pl_op;

21
src/Sema.zig
View File

@ -376,7 +376,7 @@ pub const Block = struct {
c_import_buf: ?*std.ArrayList(u8) = null,
/// If not `null`, this boolean is set when a `dbg_var_ptr` or `dbg_var_val`
/// If not `null`, this boolean is set when a `dbg_var_ptr`, `dbg_var_val`, or `dbg_arg_inline`.
/// instruction is emitted. It signals that the innermost lexically
/// enclosing `block`/`block_inline` should be translated into a real AIR
/// `block` in order for codegen to match lexical scoping for debug vars.
@ -6567,7 +6567,7 @@ fn addDbgVar(
const operand_ty = sema.typeOf(operand);
const val_ty = switch (air_tag) {
.dbg_var_ptr => operand_ty.childType(mod),
.dbg_var_val => operand_ty,
.dbg_var_val, .dbg_arg_inline => operand_ty,
else => unreachable,
};
if (try sema.typeRequiresComptime(val_ty)) return;
@ -6586,25 +6586,26 @@ fn addDbgVar(
if (block.need_debug_scope) |ptr| ptr.* = true;
// Add the name to the AIR.
const name_extra_index = try sema.appendAirString(name);
const name_nts = try sema.appendAirString(name);
_ = try block.addInst(.{
.tag = air_tag,
.data = .{ .pl_op = .{
.payload = name_extra_index,
.payload = @intFromEnum(name_nts),
.operand = operand,
} },
});
}
pub fn appendAirString(sema: *Sema, str: []const u8) Allocator.Error!u32 {
const str_extra_index: u32 = @intCast(sema.air_extra.items.len);
pub fn appendAirString(sema: *Sema, str: []const u8) Allocator.Error!Air.NullTerminatedString {
if (str.len == 0) return .none;
const nts: Air.NullTerminatedString = @enumFromInt(sema.air_extra.items.len);
const elements_used = str.len / 4 + 1;
const elements = try sema.air_extra.addManyAsSlice(sema.gpa, elements_used);
const buffer = mem.sliceAsBytes(elements);
@memcpy(buffer[0..str.len], str);
buffer[str.len] = 0;
return str_extra_index;
return nts;
}
fn zirDeclRef(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Air.Inst.Ref {
@ -7748,14 +7749,14 @@ fn analyzeCall(
const param_name = sema.code.nullTerminatedString(extra.data.name);
const inst = sema.inst_map.get(param).?;
try sema.addDbgVar(&child_block, inst, .dbg_var_val, param_name);
try sema.addDbgVar(&child_block, inst, .dbg_arg_inline, param_name);
},
.param_anytype, .param_anytype_comptime => {
const inst_data = sema.code.instructions.items(.data)[@intFromEnum(param)].str_tok;
const param_name = inst_data.get(sema.code);
const inst = sema.inst_map.get(param).?;
try sema.addDbgVar(&child_block, inst, .dbg_var_val, param_name);
try sema.addDbgVar(&child_block, inst, .dbg_arg_inline, param_name);
},
else => continue,
};
@ -8266,7 +8267,7 @@ fn instantiateGenericCall(
.name = if (child_block.ownerModule().strip)
.none
else
@enumFromInt(try sema.appendAirString(fn_zir.nullTerminatedString(param_name))),
try sema.appendAirString(fn_zir.nullTerminatedString(param_name)),
} },
}));
try child_block.params.append(sema.arena, .{

28
src/Zcu/PerThread.zig
View File

@ -1240,11 +1240,11 @@ fn semaCau(pt: Zcu.PerThread, cau_index: InternPool.Cau.Index) !SemaCauResult {
};
}
const nav_already_populated, const queue_linker_work = switch (ip.indexToKey(decl_val.toIntern())) {
.func => |f| .{ f.owner_nav == nav_index, false },
.variable => |v| .{ false, v.owner_nav == nav_index },
.@"extern" => .{ false, false },
else => .{ false, true },
const nav_already_populated, const queue_linker_work, const resolve_type = switch (ip.indexToKey(decl_val.toIntern())) {
.func => |f| .{ f.owner_nav == nav_index, true, false },
.variable => |v| .{ false, v.owner_nav == nav_index, true },
.@"extern" => .{ false, false, false },
else => .{ false, true, true },
};
if (nav_already_populated) {
@ -1317,14 +1317,16 @@ fn semaCau(pt: Zcu.PerThread, cau_index: InternPool.Cau.Index) !SemaCauResult {
queue_codegen: {
if (!queue_linker_work) break :queue_codegen;
// Needed for codegen_nav which will call updateDecl and then the
// codegen backend wants full access to the Decl Type.
// We also need this for the `isFnOrHasRuntimeBits` check below.
// TODO: we could make the language more lenient by deferring this work
// to the `codegen_nav` job.
try decl_ty.resolveFully(pt);
if (resolve_type) {
// Needed for codegen_nav which will call updateDecl and then the
// codegen backend wants full access to the Decl Type.
// We also need this for the `isFnOrHasRuntimeBits` check below.
// TODO: we could make the language more lenient by deferring this work
// to the `codegen_nav` job.
try decl_ty.resolveFully(pt);
}
if (!decl_ty.isFnOrHasRuntimeBits(pt)) {
if (!resolve_type or !decl_ty.hasRuntimeBits(pt)) {
if (zcu.comp.config.use_llvm) break :queue_codegen;
if (file.mod.strip) break :queue_codegen;
}
@ -2158,7 +2160,7 @@ fn analyzeFnBody(pt: Zcu.PerThread, func_index: InternPool.Index) Zcu.SemaError!
.name = if (inner_block.ownerModule().strip)
.none
else
@enumFromInt(try sema.appendAirString(sema.code.nullTerminatedString(param_name))),
try sema.appendAirString(sema.code.nullTerminatedString(param_name)),
} },
});
}

31
src/arch/aarch64/CodeGen.zig
View File

@ -170,7 +170,9 @@ const DbgInfoReloc = struct {
fn genDbgInfo(reloc: DbgInfoReloc, function: Self) !void {
switch (reloc.tag) {
.arg => try reloc.genArgDbgInfo(function),
.arg,
.dbg_arg_inline,
=> try reloc.genArgDbgInfo(function),
.dbg_var_ptr,
.dbg_var_val,
@ -201,7 +203,7 @@ const DbgInfoReloc = struct {
else => unreachable, // not a possible argument
};
try dw.genVarDebugInfo(.local_arg, reloc.name, reloc.ty, loc);
try dw.genLocalDebugInfo(.local_arg, reloc.name, reloc.ty, loc);
},
.plan9 => {},
.none => {},
@ -237,7 +239,7 @@ const DbgInfoReloc = struct {
break :blk .empty;
},
};
try dwarf.genVarDebugInfo(.local_var, reloc.name, reloc.ty, loc);
try dwarf.genLocalDebugInfo(.local_var, reloc.name, reloc.ty, loc);
},
.plan9 => {},
.none => {},
@ -799,6 +801,7 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
.dbg_inline_block => try self.airDbgInlineBlock(inst),
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> try self.airDbgVar(inst),
.call => try self.airCall(inst, .auto),
@ -4220,17 +4223,13 @@ fn airArg(self: *Self, inst: Air.Inst.Index) !void {
const ty = self.typeOfIndex(inst);
const tag = self.air.instructions.items(.tag)[@intFromEnum(inst)];
const name_nts = self.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
if (name_nts != .none) {
const name = self.air.nullTerminatedString(@intFromEnum(name_nts));
try self.dbg_info_relocs.append(self.gpa, .{
.tag = tag,
.ty = ty,
.name = name,
.mcv = self.args[arg_index],
});
}
const name = self.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
if (name != .none) try self.dbg_info_relocs.append(self.gpa, .{
.tag = tag,
.ty = ty,
.name = name.toSlice(self.air),
.mcv = self.args[arg_index],
});
const result: MCValue = if (self.liveness.isUnused(inst)) .dead else self.args[arg_index];
return self.finishAir(inst, result, .{ .none, .none, .none });
@ -4644,14 +4643,14 @@ fn airDbgVar(self: *Self, inst: Air.Inst.Index) !void {
const tag = self.air.instructions.items(.tag)[@intFromEnum(inst)];
const ty = self.typeOf(operand);
const mcv = try self.resolveInst(operand);
const name = self.air.nullTerminatedString(pl_op.payload);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
log.debug("airDbgVar: %{d}: {}, {}", .{ inst, ty.fmtDebug(), mcv });
try self.dbg_info_relocs.append(self.gpa, .{
.tag = tag,
.ty = ty,
.name = name,
.name = name.toSlice(self.air),
.mcv = mcv,
});

30
src/arch/arm/CodeGen.zig
View File

@ -248,7 +248,9 @@ const DbgInfoReloc = struct {
fn genDbgInfo(reloc: DbgInfoReloc, function: Self) !void {
switch (reloc.tag) {
.arg => try reloc.genArgDbgInfo(function),
.arg,
.dbg_arg_inline,
=> try reloc.genArgDbgInfo(function),
.dbg_var_ptr,
.dbg_var_val,
@ -279,7 +281,7 @@ const DbgInfoReloc = struct {
else => unreachable, // not a possible argument
};
try dw.genVarDebugInfo(.local_arg, reloc.name, reloc.ty, loc);
try dw.genLocalDebugInfo(.local_arg, reloc.name, reloc.ty, loc);
},
.plan9 => {},
.none => {},
@ -315,7 +317,7 @@ const DbgInfoReloc = struct {
break :blk .empty;
},
};
try dw.genVarDebugInfo(.local_var, reloc.name, reloc.ty, loc);
try dw.genLocalDebugInfo(.local_var, reloc.name, reloc.ty, loc);
},
.plan9 => {},
.none => {},
@ -786,6 +788,7 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
.dbg_inline_block => try self.airDbgInlineBlock(inst),
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> try self.airDbgVar(inst),
.call => try self.airCall(inst, .auto),
@ -4199,16 +4202,13 @@ fn airArg(self: *Self, inst: Air.Inst.Index) !void {
const ty = self.typeOfIndex(inst);
const tag = self.air.instructions.items(.tag)[@intFromEnum(inst)];
const name_nts = self.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
if (name_nts != .none) {
const name = self.air.nullTerminatedString(@intFromEnum(name_nts));
try self.dbg_info_relocs.append(self.gpa, .{
.tag = tag,
.ty = ty,
.name = name,
.mcv = self.args[arg_index],
});
}
const name = self.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
if (name != .none) try self.dbg_info_relocs.append(self.gpa, .{
.tag = tag,
.ty = ty,
.name = name.toSlice(self.air),
.mcv = self.args[arg_index],
});
const result: MCValue = if (self.liveness.isUnused(inst)) .dead else self.args[arg_index];
return self.finishAir(inst, result, .{ .none, .none, .none });
@ -4612,14 +4612,14 @@ fn airDbgVar(self: *Self, inst: Air.Inst.Index) !void {
const tag = self.air.instructions.items(.tag)[@intFromEnum(inst)];
const ty = self.typeOf(operand);
const mcv = try self.resolveInst(operand);
const name = self.air.nullTerminatedString(pl_op.payload);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
log.debug("airDbgVar: %{d}: {}, {}", .{ inst, ty.fmtDebug(), mcv });
try self.dbg_info_relocs.append(self.gpa, .{
.tag = tag,
.ty = ty,
.name = name,
.name = name.toSlice(self.air),
.mcv = mcv,
});

22
src/arch/riscv64/CodeGen.zig
View File

@ -1644,6 +1644,7 @@ fn genBody(func: *Func, body: []const Air.Inst.Index) InnerError!void {
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> try func.airDbgVar(inst),
.dbg_inline_block => try func.airDbgInlineBlock(inst),
@ -4673,11 +4674,15 @@ fn genArgDbgInfo(func: Func, inst: Air.Inst.Index, mcv: MCValue) !void {
const arg = func.air.instructions.items(.data)[@intFromEnum(inst)].arg;
const ty = arg.ty.toType();
if (arg.name == .none) return;
const name = func.air.nullTerminatedString(@intFromEnum(arg.name));
switch (func.debug_output) {
.dwarf => |dw| switch (mcv) {
.register => |reg| try dw.genVarDebugInfo(.local_arg, name, ty, .{ .reg = reg.dwarfNum() }),
.register => |reg| try dw.genLocalDebugInfo(
.local_arg,
arg.name.toSlice(func.air),
ty,
.{ .reg = reg.dwarfNum() },
),
.load_frame => {},
else => {},
},
@ -5179,16 +5184,17 @@ fn airDbgVar(func: *Func, inst: Air.Inst.Index) !void {
const operand = pl_op.operand;
const ty = func.typeOf(operand);
const mcv = try func.resolveInst(operand);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
const name = func.air.nullTerminatedString(pl_op.payload);
try func.genVarDbgInfo(ty, mcv, name);
const tag = func.air.instructions.items(.tag)[@intFromEnum(inst)];
try func.genVarDbgInfo(tag, ty, mcv, name.toSlice(func.air));
return func.finishAir(inst, .unreach, .{ operand, .none, .none });
}
fn genVarDbgInfo(
func: Func,
tag: Air.Inst.Tag,
ty: Type,
mcv: MCValue,
name: []const u8,
@ -5205,7 +5211,11 @@ fn genVarDbgInfo(
break :blk .empty;
},
};
try dwarf.genVarDebugInfo(.local_var, name, ty, loc);
try dwarf.genLocalDebugInfo(switch (tag) {
else => unreachable,
.dbg_var_ptr, .dbg_var_val => .local_var,
.dbg_arg_inline => .local_arg,
}, name, ty, loc);
},
.plan9 => {},
.none => {},

13
src/arch/sparc64/CodeGen.zig
View File

@ -643,6 +643,7 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
.dbg_inline_block => try self.airDbgInlineBlock(inst),
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> try self.airDbgVar(inst),
.call => try self.airCall(inst, .auto),
@ -1662,7 +1663,7 @@ fn airDbgStmt(self: *Self, inst: Air.Inst.Index) !void {
fn airDbgVar(self: *Self, inst: Air.Inst.Index) !void {
const pl_op = self.air.instructions.items(.data)[@intFromEnum(inst)].pl_op;
const name = self.air.nullTerminatedString(pl_op.payload);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
const operand = pl_op.operand;
// TODO emit debug info for this variable
_ = name;
@ -3582,13 +3583,15 @@ fn genArgDbgInfo(self: Self, inst: Air.Inst.Index, mcv: MCValue) !void {
const arg = self.air.instructions.items(.data)[@intFromEnum(inst)].arg;
const ty = arg.ty.toType();
if (arg.name == .none) return;
const name = self.air.nullTerminatedString(@intFromEnum(arg.name));
switch (self.debug_output) {
.dwarf => |dw| switch (mcv) {
.register => |reg| try dw.genVarDebugInfo(.local_arg, name, ty, .{
.reg = reg.dwarfNum(),
}),
.register => |reg| try dw.genLocalDebugInfo(
.local_arg,
arg.name.toSlice(self.air),
ty,
.{ .reg = reg.dwarfNum() },
),
else => {},
},
else => {},

32
src/arch/wasm/CodeGen.zig
View File

@ -1917,8 +1917,9 @@ fn genInst(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
.dbg_stmt => func.airDbgStmt(inst),
.dbg_inline_block => func.airDbgInlineBlock(inst),
.dbg_var_ptr => func.airDbgVar(inst, true),
.dbg_var_val => func.airDbgVar(inst, false),
.dbg_var_ptr => func.airDbgVar(inst, .local_var, true),
.dbg_var_val => func.airDbgVar(inst, .local_var, false),
.dbg_arg_inline => func.airDbgVar(inst, .local_arg, false),
.call => func.airCall(inst, .auto),
.call_always_tail => func.airCall(inst, .always_tail),
@ -2585,13 +2586,13 @@ fn airArg(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
switch (func.debug_output) {
.dwarf => |dwarf| {
const name_nts = func.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
if (name_nts != .none) {
const name = func.air.nullTerminatedString(@intFromEnum(name_nts));
try dwarf.genVarDebugInfo(.local_arg, name, arg_ty, .{
.wasm_ext = .{ .local = arg.local.value },
});
}
const name = func.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
if (name != .none) try dwarf.genLocalDebugInfo(
.local_arg,
name.toSlice(func.air),
arg_ty,
.{ .wasm_ext = .{ .local = arg.local.value } },
);
},
else => {},
}
@ -6454,7 +6455,12 @@ fn airDbgInlineBlock(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
try func.lowerBlock(inst, ty_pl.ty.toType(), @ptrCast(func.air.extra[extra.end..][0..extra.data.body_len]));
}
fn airDbgVar(func: *CodeGen, inst: Air.Inst.Index, is_ptr: bool) InnerError!void {
fn airDbgVar(
func: *CodeGen,
inst: Air.Inst.Index,
local_tag: link.File.Dwarf.WipNav.LocalTag,
is_ptr: bool,
) InnerError!void {
_ = is_ptr;
if (func.debug_output != .dwarf) return func.finishAir(inst, .none, &.{});
@ -6464,8 +6470,8 @@ fn airDbgVar(func: *CodeGen, inst: Air.Inst.Index, is_ptr: bool) InnerError!void
log.debug("airDbgVar: %{d}: {}, {}", .{ inst, ty.fmtDebug(), operand });
const name = func.air.nullTerminatedString(pl_op.payload);
log.debug(" var name = ({s})", .{name});
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
log.debug(" var name = ({s})", .{name.toSlice(func.air)});
const loc: link.File.Dwarf.Loc = switch (operand) {
.local => |local| .{ .wasm_ext = .{ .local = local.value } },
@ -6474,7 +6480,7 @@ fn airDbgVar(func: *CodeGen, inst: Air.Inst.Index, is_ptr: bool) InnerError!void
break :blk .empty;
},
};
try func.debug_output.dwarf.genVarDebugInfo(.local_var, name, ty, loc);
try func.debug_output.dwarf.genLocalDebugInfo(local_tag, name.toSlice(func.air), ty, loc);
return func.finishAir(inst, .none, &.{});
}

506
src/arch/x86_64/CodeGen.zig
View File

@ -64,8 +64,8 @@ va_info: union {
sysv: struct {
gp_count: u32,
fp_count: u32,
overflow_arg_area: FrameAddr,
reg_save_area: FrameAddr,
overflow_arg_area: bits.FrameAddr,
reg_save_area: bits.FrameAddr,
},
win64: struct {},
},
@ -81,9 +81,6 @@ mir_instructions: std.MultiArrayList(Mir.Inst) = .{},
/// MIR extra data
mir_extra: std.ArrayListUnmanaged(u32) = .{},
stack_args: std.ArrayListUnmanaged(StackVar) = .{},
stack_vars: std.ArrayListUnmanaged(StackVar) = .{},
/// Byte offset within the source file of the ending curly.
end_di_line: u32,
end_di_column: u32,
@ -113,10 +110,6 @@ air_bookkeeping: @TypeOf(air_bookkeeping_init) = air_bookkeeping_init,
const air_bookkeeping_init = if (std.debug.runtime_safety) @as(usize, 0) else {};
const FrameAddr = struct { index: FrameIndex, off: i32 = 0 };
const RegisterOffset = struct { reg: Register, off: i32 = 0 };
const SymbolOffset = struct { sym: u32, off: i32 = 0 };
const Owner = union(enum) {
nav_index: InternPool.Nav.Index,
lazy_sym: link.File.LazySymbol,
@ -174,7 +167,7 @@ pub const MCValue = union(enum) {
/// The value is split across two registers.
register_pair: [2]Register,
/// The value is a constant offset from the value in a register.
register_offset: RegisterOffset,
register_offset: bits.RegisterOffset,
/// The value is a tuple { wrapped, overflow } where wrapped value is stored in the GP register.
register_overflow: struct { reg: Register, eflags: Condition },
/// The value is in memory at a hard-coded address.
@ -182,11 +175,11 @@ pub const MCValue = union(enum) {
memory: u64,
/// The value is in memory at an address not-yet-allocated by the linker.
/// This traditionally corresponds to a relocation emitted in a relocatable object file.
load_symbol: SymbolOffset,
load_symbol: bits.SymbolOffset,
/// The address of the memory location not-yet-allocated by the linker.
lea_symbol: SymbolOffset,
lea_symbol: bits.SymbolOffset,
/// The value is in memory at a constant offset from the address in a register.
indirect: RegisterOffset,
indirect: bits.RegisterOffset,
/// The value is in memory.
/// Payload is a symbol index.
load_direct: u32,
@ -207,10 +200,10 @@ pub const MCValue = union(enum) {
lea_tlv: u32,
/// The value stored at an offset from a frame index
/// Payload is a frame address.
load_frame: FrameAddr,
load_frame: bits.FrameAddr,
/// The address of an offset from a frame index
/// Payload is a frame address.
lea_frame: FrameAddr,
lea_frame: bits.FrameAddr,
/// Supports integer_per_element abi
elementwise_regs_then_frame: packed struct { regs: u3 = 0, frame_off: i29 = 0, frame_index: FrameIndex },
/// This indicates that we have already allocated a frame index for this instruction,
@ -426,10 +419,7 @@ pub const MCValue = union(enum) {
.load_symbol => |sym_off| {
assert(sym_off.off == 0);
return .{
.base = .{ .reloc = .{
.atom_index = try function.owner.getSymbolIndex(function),
.sym_index = sym_off.sym,
} },
.base = .{ .reloc = sym_off.sym_index },
.mod = .{ .rm = .{
.size = size,
.disp = sym_off.off,
@ -456,8 +446,8 @@ pub const MCValue = union(enum) {
.register_overflow => |pl| try writer.print("{s}:{s}", .{
@tagName(pl.eflags), @tagName(pl.reg),
}),
.load_symbol => |pl| try writer.print("[{} + 0x{x}]", .{ pl.sym, pl.off }),
.lea_symbol => |pl| try writer.print("{} + 0x{x}", .{ pl.sym, pl.off }),
.load_symbol => |pl| try writer.print("[{} + 0x{x}]", .{ pl.sym_index, pl.off }),
.lea_symbol => |pl| try writer.print("{} + 0x{x}", .{ pl.sym_index, pl.off }),
.indirect => |pl| try writer.print("[{s} + 0x{x}]", .{ @tagName(pl.reg), pl.off }),
.load_direct => |pl| try writer.print("[direct:{d}]", .{pl}),
.lea_direct => |pl| try writer.print("direct:{d}", .{pl}),
@ -728,12 +718,6 @@ const InstTracking = struct {
}
};
const StackVar = struct {
name: []const u8,
type: Type,
frame_addr: FrameAddr,
};
const FrameAlloc = struct {
abi_size: u31,
spill_pad: u3,
@ -839,8 +823,6 @@ pub fn generate(
function.exitlude_jump_relocs.deinit(gpa);
function.mir_instructions.deinit(gpa);
function.mir_extra.deinit(gpa);
function.stack_args.deinit(gpa);
function.stack_vars.deinit(gpa);
}
wip_mir_log.debug("{}:", .{fmtNav(func.owner_nav, ip)});
@ -913,9 +895,6 @@ pub fn generate(
else => |e| return e,
};
try function.genStackVarDebugInfo(.local_arg, function.stack_args.items);
try function.genStackVarDebugInfo(.local_var, function.stack_vars.items);
var mir: Mir = .{
.instructions = function.mir_instructions.toOwnedSlice(),
.extra = try function.mir_extra.toOwnedSlice(gpa),
@ -924,6 +903,7 @@ pub fn generate(
defer mir.deinit(gpa);
var emit: Emit = .{
.air = function.air,
.lower = .{
.bin_file = bin_file,
.allocator = gpa,
@ -934,6 +914,13 @@ pub fn generate(
.link_mode = comp.config.link_mode,
.pic = mod.pic,
},
.atom_index = function.owner.getSymbolIndex(&function) catch |err| switch (err) {
error.CodegenFail => return Result{ .fail = function.err_msg.? },
error.OutOfRegisters => return Result{
.fail = try ErrorMsg.create(gpa, src_loc, "CodeGen ran out of registers. This is a bug in the Zig compiler.", .{}),
},
else => |e| return e,
},
.debug_output = debug_output,
.code = code,
.prev_di_pc = 0,
@ -1013,14 +1000,15 @@ pub fn generateLazy(
else => |e| return e,
};
var mir = Mir{
var mir: Mir = .{
.instructions = function.mir_instructions.toOwnedSlice(),
.extra = try function.mir_extra.toOwnedSlice(gpa),
.frame_locs = function.frame_locs.toOwnedSlice(),
};
defer mir.deinit(gpa);
var emit = Emit{
var emit: Emit = .{
.air = function.air,
.lower = .{
.bin_file = bin_file,
.allocator = gpa,
@ -1031,6 +1019,13 @@ pub fn generateLazy(
.link_mode = comp.config.link_mode,
.pic = mod.pic,
},
.atom_index = function.owner.getSymbolIndex(&function) catch |err| switch (err) {
error.CodegenFail => return Result{ .fail = function.err_msg.? },
error.OutOfRegisters => return Result{
.fail = try ErrorMsg.create(gpa, src_loc, "CodeGen ran out of registers. This is a bug in the Zig compiler.", .{}),
},
else => |e| return e,
},
.debug_output = debug_output,
.code = code,
.prev_di_pc = undefined, // no debug info yet
@ -1116,7 +1111,7 @@ fn formatWipMir(
) @TypeOf(writer).Error!void {
const comp = data.self.bin_file.comp;
const mod = comp.root_mod;
var lower = Lower{
var lower: Lower = .{
.bin_file = data.self.bin_file,
.allocator = data.self.gpa,
.mir = .{
@ -1204,6 +1199,7 @@ fn addExtraAssumeCapacity(self: *Self, extra: anytype) u32 {
self.mir_extra.appendAssumeCapacity(switch (field.type) {
u32 => @field(extra, field.name),
i32, Mir.Memory.Info => @bitCast(@field(extra, field.name)),
bits.FrameIndex => @intFromEnum(@field(extra, field.name)),
else => @compileError("bad field type: " ++ field.name ++ ": " ++ @typeName(field.type)),
});
}
@ -1357,6 +1353,124 @@ fn asmPlaceholder(self: *Self) !Mir.Inst.Index {
});
}
const MirTagAir = enum { dbg_local };
fn asmAir(self: *Self, tag: MirTagAir, inst: Air.Inst.Index) !void {
_ = try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_a,
},
.data = .{ .a = .{ .air_inst = inst } },
});
}
fn asmAirImmediate(self: *Self, tag: MirTagAir, inst: Air.Inst.Index, imm: Immediate) !void {
switch (imm) {
.signed => |s| _ = try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_ai_s,
},
.data = .{ .ai = .{
.air_inst = inst,
.i = @bitCast(s),
} },
}),
.unsigned => |u| _ = if (math.cast(u32, u)) |small| try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_ai_u,
},
.data = .{ .ai = .{
.air_inst = inst,
.i = small,
} },
}) else try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_ai_64,
},
.data = .{ .ai = .{
.air_inst = inst,
.i = try self.addExtra(Mir.Imm64.encode(u)),
} },
}),
.reloc => |sym_off| _ = if (sym_off.off == 0) try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_as,
},
.data = .{ .as = .{
.air_inst = inst,
.sym_index = sym_off.sym_index,
} },
}) else try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_aso,
},
.data = .{ .ax = .{
.air_inst = inst,
.payload = try self.addExtra(sym_off),
} },
}),
}
}
fn asmAirRegisterImmediate(
self: *Self,
tag: MirTagAir,
inst: Air.Inst.Index,
reg: Register,
imm: Immediate,
) !void {
_ = try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_aro,
},
.data = .{ .rx = .{
.r1 = reg,
.payload = try self.addExtra(Mir.AirOffset{
.air_inst = inst,
.off = imm.signed,
}),
} },
});
}
fn asmAirFrameAddress(
self: *Self,
tag: MirTagAir,
inst: Air.Inst.Index,
frame_addr: bits.FrameAddr,
) !void {
_ = try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_af,
},
.data = .{ .ax = .{
.air_inst = inst,
.payload = try self.addExtra(frame_addr),
} },
});
}
fn asmAirMemory(self: *Self, tag: MirTagAir, inst: Air.Inst.Index, m: Memory) !void {
_ = try self.addInst(.{
.tag = .pseudo,
.ops = switch (tag) {
.dbg_local => .pseudo_dbg_local_am,
},
.data = .{ .ax = .{
.air_inst = inst,
.payload = try self.addExtra(Mir.Memory.encode(m)),
} },
});
}
fn asmOpOnly(self: *Self, tag: Mir.Inst.FixedTag) !void {
_ = try self.addInst(.{
.tag = tag[1],
@ -1395,9 +1509,9 @@ fn asmImmediate(self: *Self, tag: Mir.Inst.FixedTag, imm: Immediate) !void {
.reloc => .rel,
},
.data = switch (imm) {
.reloc => |x| reloc: {
.reloc => |sym_off| reloc: {
assert(tag[0] == ._);
break :reloc .{ .reloc = x };
break :reloc .{ .reloc = sym_off };
},
.signed, .unsigned => .{ .i = .{
.fixes = tag[0],
@ -1424,31 +1538,22 @@ fn asmRegisterRegister(self: *Self, tag: Mir.Inst.FixedTag, reg1: Register, reg2
}
fn asmRegisterImmediate(self: *Self, tag: Mir.Inst.FixedTag, reg: Register, imm: Immediate) !void {
const ops: Mir.Inst.Ops = switch (imm) {
.signed => .ri_s,
.unsigned => |u| if (math.cast(u32, u)) |_| .ri_u else .ri64,
const ops: Mir.Inst.Ops, const i: u32 = switch (imm) {
.signed => |s| .{ .ri_s, @bitCast(s) },
.unsigned => |u| if (math.cast(u32, u)) |small|
.{ .ri_u, small }
else
.{ .ri_64, try self.addExtra(Mir.Imm64.encode(imm.unsigned)) },
.reloc => unreachable,
};
_ = try self.addInst(.{
.tag = tag[1],
.ops = ops,
.data = switch (ops) {
.ri_s, .ri_u => .{ .ri = .{
.fixes = tag[0],
.r1 = reg,
.i = switch (imm) {
.signed => |s| @bitCast(s),
.unsigned => |u| @intCast(u),
.reloc => unreachable,
},
} },
.ri64 => .{ .rx = .{
.fixes = tag[0],
.r1 = reg,
.payload = try self.addExtra(Mir.Imm64.encode(imm.unsigned)),
} },
else => unreachable,
},
.data = .{ .ri = .{
.fixes = tag[0],
.r1 = reg,
.i = i,
} },
});
}
@ -2158,6 +2263,7 @@ fn genBody(self: *Self, body: []const Air.Inst.Index) InnerError!void {
.dbg_inline_block => try self.airDbgInlineBlock(inst),
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> try self.airDbgVar(inst),
.call => try self.airCall(inst, .auto),
@ -2485,12 +2591,12 @@ fn computeFrameLayout(self: *Self, cc: std.builtin.CallingConvention) !FrameLayo
};
}
fn getFrameAddrAlignment(self: *Self, frame_addr: FrameAddr) Alignment {
fn getFrameAddrAlignment(self: *Self, frame_addr: bits.FrameAddr) Alignment {
const alloc_align = self.frame_allocs.get(@intFromEnum(frame_addr.index)).abi_align;
return @enumFromInt(@min(@intFromEnum(alloc_align), @ctz(frame_addr.off)));
}
fn getFrameAddrSize(self: *Self, frame_addr: FrameAddr) u32 {
fn getFrameAddrSize(self: *Self, frame_addr: bits.FrameAddr) u32 {
return self.frame_allocs.get(@intFromEnum(frame_addr.index)).abi_size - @as(u31, @intCast(frame_addr.off));
}
@ -11951,87 +12057,65 @@ fn airArg(self: *Self, inst: Air.Inst.Index) !void {
fn airDbgArg(self: *Self, inst: Air.Inst.Index) !void {
defer self.finishAirBookkeeping();
if (self.debug_output == .none) return;
const name_nts = self.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
const name = self.air.nullTerminatedString(@intFromEnum(name_nts));
if (name.len > 0) {
const arg_ty = self.typeOfIndex(inst);
const arg_mcv = self.getResolvedInstValue(inst).short;
try self.genVarDebugInfo(.local_arg, .dbg_var_val, name, arg_ty, arg_mcv);
}
const name = self.air.instructions.items(.data)[@intFromEnum(inst)].arg.name;
if (name != .none) try self.genLocalDebugInfo(inst, self.getResolvedInstValue(inst).short);
if (self.liveness.isUnused(inst)) try self.processDeath(inst);
}
fn genVarDebugInfo(
fn genLocalDebugInfo(
self: *Self,
var_tag: link.File.Dwarf.WipNav.VarTag,
tag: Air.Inst.Tag,
name: []const u8,
ty: Type,
inst: Air.Inst.Index,
mcv: MCValue,
) !void {
const stack_vars = switch (var_tag) {
.local_arg => &self.stack_args,
.local_var => &self.stack_vars,
};
switch (self.debug_output) {
.dwarf => |dwarf| switch (tag) {
else => unreachable,
.dbg_var_ptr => {
const var_ty = ty.childType(self.pt.zcu);
switch (mcv) {
else => {
log.info("dbg_var_ptr({s}({}))", .{ @tagName(mcv), mcv });
unreachable;
},
.unreach, .dead, .elementwise_regs_then_frame, .reserved_frame, .air_ref => unreachable,
.lea_frame => |frame_addr| try stack_vars.append(self.gpa, .{
.name = name,
.type = var_ty,
.frame_addr = frame_addr,
}),
.lea_symbol => |sym_off| try dwarf.genVarDebugInfo(var_tag, name, var_ty, .{ .plus = .{
&.{ .addr = .{ .sym = sym_off.sym } },
&.{ .consts = sym_off.off },
} }),
}
},
.dbg_var_val => switch (mcv) {
.none => try dwarf.genVarDebugInfo(var_tag, name, ty, .empty),
if (self.debug_output == .none) return;
switch (self.air.instructions.items(.tag)[@intFromEnum(inst)]) {
else => unreachable,
.arg, .dbg_arg_inline, .dbg_var_val => |tag| {
switch (mcv) {
.none => try self.asmAir(.dbg_local, inst),
.unreach, .dead, .elementwise_regs_then_frame, .reserved_frame, .air_ref => unreachable,
.immediate => |immediate| try dwarf.genVarDebugInfo(var_tag, name, ty, .{ .stack_value = &.{
.constu = immediate,
} }),
.immediate => |imm| try self.asmAirImmediate(.dbg_local, inst, Immediate.u(imm)),
.lea_frame => |frame_addr| try self.asmAirFrameAddress(.dbg_local, inst, frame_addr),
.lea_symbol => |sym_off| try self.asmAirImmediate(.dbg_local, inst, Immediate.rel(sym_off)),
else => {
const ty = switch (tag) {
else => unreachable,
.arg => self.typeOfIndex(inst),
.dbg_arg_inline, .dbg_var_val => self.typeOf(
self.air.instructions.items(.data)[@intFromEnum(inst)].pl_op.operand,
),
};
const frame_index = try self.allocFrameIndex(FrameAlloc.initSpill(ty, self.pt));
try self.genSetMem(.{ .frame = frame_index }, 0, ty, mcv, .{});
try stack_vars.append(self.gpa, .{
.name = name,
.type = ty,
.frame_addr = .{ .index = frame_index },
try self.asmAirMemory(.dbg_local, inst, .{
.base = .{ .frame = frame_index },
.mod = .{ .rm = .{ .size = .qword } },
});
},
},
}
},
.plan9 => {},
.none => {},
}
}
fn genStackVarDebugInfo(
self: Self,
var_tag: link.File.Dwarf.WipNav.VarTag,
stack_vars: []const StackVar,
) !void {
switch (self.debug_output) {
.dwarf => |dwarf| for (stack_vars) |stack_var| {
const frame_loc = self.frame_locs.get(@intFromEnum(stack_var.frame_addr.index));
try dwarf.genVarDebugInfo(var_tag, stack_var.name, stack_var.type, .{ .plus = .{
&.{ .breg = frame_loc.base.dwarfNum() },
&.{ .consts = @as(i33, frame_loc.disp) + stack_var.frame_addr.off },
} });
.dbg_var_ptr => switch (mcv) {
else => unreachable,
.unreach, .dead, .elementwise_regs_then_frame, .reserved_frame, .air_ref => unreachable,
.lea_frame => |frame_addr| try self.asmAirMemory(.dbg_local, inst, .{
.base = .{ .frame = frame_addr.index },
.mod = .{ .rm = .{
.size = .qword,
.disp = frame_addr.off,
} },
}),
.lea_symbol => |sym_off| try self.asmAirMemory(.dbg_local, inst, .{
.base = .{ .reloc = sym_off.sym_index },
.mod = .{ .rm = .{
.size = .qword,
.disp = sym_off.off,
} },
}),
.lea_direct, .lea_got, .lea_tlv => |sym_index| try self.asmAirMemory(.dbg_local, inst, .{
.base = .{ .reloc = sym_index },
.mod = .{ .rm = .{ .size = .qword } },
}),
},
.plan9 => {},
.none => {},
}
}
@ -12351,10 +12435,7 @@ fn genCall(self: *Self, info: union(enum) {
if (self.bin_file.cast(.elf)) |elf_file| {
const zo = elf_file.zigObjectPtr().?;
const sym_index = try zo.getOrCreateMetadataForNav(elf_file, func.owner_nav);
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = sym_index,
}));
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{ .sym_index = sym_index }));
} else if (self.bin_file.cast(.coff)) |coff_file| {
const atom = try coff_file.getOrCreateAtomForNav(func.owner_nav);
const sym_index = coff_file.getAtom(atom).getSymbolIndex().?;
@ -12364,10 +12445,7 @@ fn genCall(self: *Self, info: union(enum) {
const zo = macho_file.getZigObject().?;
const sym_index = try zo.getOrCreateMetadataForNav(macho_file, func.owner_nav);
const sym = zo.symbols.items[sym_index];
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = sym.nlist_idx,
}));
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{ .sym_index = sym.nlist_idx }));
} else if (self.bin_file.cast(.plan9)) |p9| {
const atom_index = try p9.seeNav(pt, func.owner_nav);
const atom = p9.getAtom(atom_index);
@ -12385,19 +12463,13 @@ fn genCall(self: *Self, info: union(enum) {
@"extern".name.toSlice(ip),
@"extern".lib_name.toSlice(ip),
);
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = target_sym_index,
}));
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{ .sym_index = target_sym_index }));
} else if (self.bin_file.cast(.macho)) |macho_file| {
const target_sym_index = try macho_file.getGlobalSymbol(
@"extern".name.toSlice(ip),
@"extern".lib_name.toSlice(ip),
);
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = target_sym_index,
}));
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{ .sym_index = target_sym_index }));
} else try self.genExternSymbolRef(
.call,
@"extern".lib_name.toSlice(ip),
@ -12412,16 +12484,10 @@ fn genCall(self: *Self, info: union(enum) {
},
.lib => |lib| if (self.bin_file.cast(.elf)) |elf_file| {
const target_sym_index = try elf_file.getGlobalSymbol(lib.callee, lib.lib);
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = target_sym_index,
}));
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{ .sym_index = target_sym_index }));
} else if (self.bin_file.cast(.macho)) |macho_file| {
const target_sym_index = try macho_file.getGlobalSymbol(lib.callee, lib.lib);
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = target_sym_index,
}));
try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{ .sym_index = target_sym_index }));
} else try self.genExternSymbolRef(.call, lib.lib, lib.callee),
}
return call_info.return_value.short;
@ -13060,29 +13126,21 @@ fn airDbgInlineBlock(self: *Self, inst: Air.Inst.Index) !void {
self.inline_func = extra.data.func;
_ = try self.addInst(.{
.tag = .pseudo,
.ops = .pseudo_dbg_inline_func,
.ops = .pseudo_dbg_enter_inline_func,
.data = .{ .func = extra.data.func },
});
try self.lowerBlock(inst, @ptrCast(self.air.extra[extra.end..][0..extra.data.body_len]));
_ = try self.addInst(.{
.tag = .pseudo,
.ops = .pseudo_dbg_inline_func,
.ops = .pseudo_dbg_leave_inline_func,
.data = .{ .func = old_inline_func },
});
}
fn airDbgVar(self: *Self, inst: Air.Inst.Index) !void {
const pl_op = self.air.instructions.items(.data)[@intFromEnum(inst)].pl_op;
const operand = pl_op.operand;
const ty = self.typeOf(operand);
const mcv = try self.resolveInst(operand);
const name = self.air.nullTerminatedString(pl_op.payload);
const tag = self.air.instructions.items(.tag)[@intFromEnum(inst)];
try self.genVarDebugInfo(.local_var, tag, name, ty, mcv);
return self.finishAir(inst, .unreach, .{ operand, .none, .none });
try self.genLocalDebugInfo(inst, try self.resolveInst(pl_op.operand));
return self.finishAir(inst, .unreach, .{ pl_op.operand, .none, .none });
}
fn genCondBrMir(self: *Self, ty: Type, mcv: MCValue) !Mir.Inst.Index {
@ -14970,10 +15028,7 @@ fn genSetReg(
.general_purpose => {
assert(sym_off.off == 0);
try self.asmRegisterMemory(.{ ._, .mov }, registerAlias(dst_reg, abi_size), .{
.base = .{ .reloc = .{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = sym_off.sym,
} },
.base = .{ .reloc = sym_off.sym_index },
.mod = .{ .rm = .{
.size = self.memSize(ty),
.disp = sym_off.off,
@ -14991,10 +15046,7 @@ fn genSetReg(
.ops = .direct_reloc,
.data = .{ .rx = .{
.r1 = registerAlias(dst_reg, abi_size),
.payload = try self.addExtra(bits.Symbol{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = sym_index,
}),
.payload = try self.addExtra(bits.SymbolOffset{ .sym_index = sym_index }),
} },
});
return;
@ -15019,52 +15071,38 @@ fn genSetReg(
},
);
},
.lea_symbol => |sym_index| {
const atom_index = try self.owner.getSymbolIndex(self);
switch (self.bin_file.tag) {
.elf, .macho => {
try self.asmRegisterMemory(
.{ ._, .lea },
dst_reg.to64(),
.{
.base = .{ .reloc = .{
.atom_index = atom_index,
.sym_index = sym_index.sym,
} },
.mod = .{ .rm = .{
.size = .qword,
.disp = sym_index.off,
} },
},
);
.lea_symbol => |sym_off| switch (self.bin_file.tag) {
.elf, .macho => try self.asmRegisterMemory(
.{ ._, .lea },
dst_reg.to64(),
.{
.base = .{ .reloc = sym_off.sym_index },
.mod = .{ .rm = .{
.size = .qword,
.disp = sym_off.off,
} },
},
else => return self.fail("TODO emit symbol sequence on {s}", .{
@tagName(self.bin_file.tag),
}),
}
},
.lea_direct, .lea_got => |sym_index| {
const atom_index = try self.owner.getSymbolIndex(self);
_ = try self.addInst(.{
.tag = switch (src_mcv) {
.lea_direct => .lea,
.lea_got => .mov,
else => unreachable,
},
.ops = switch (src_mcv) {
.lea_direct => .direct_reloc,
.lea_got => .got_reloc,
else => unreachable,
},
.data = .{ .rx = .{
.r1 = dst_reg.to64(),
.payload = try self.addExtra(bits.Symbol{
.atom_index = atom_index,
.sym_index = sym_index,
}),
} },
});
),
else => return self.fail("TODO emit symbol sequence on {s}", .{
@tagName(self.bin_file.tag),
}),
},
.lea_direct, .lea_got => |sym_index| _ = try self.addInst(.{
.tag = switch (src_mcv) {
.lea_direct => .lea,
.lea_got => .mov,
else => unreachable,
},
.ops = switch (src_mcv) {
.lea_direct => .direct_reloc,
.lea_got => .got_reloc,
else => unreachable,
},
.data = .{ .rx = .{
.r1 = dst_reg.to64(),
.payload = try self.addExtra(bits.SymbolOffset{ .sym_index = sym_index }),
} },
}),
.lea_tlv => unreachable, // TODO: remove this
.air_ref => |src_ref| try self.genSetReg(dst_reg, ty, try self.resolveInst(src_ref), opts),
}
@ -15085,7 +15123,7 @@ fn genSetMem(
.none => .{ .immediate = @bitCast(@as(i64, disp)) },
.reg => |base_reg| .{ .register_offset = .{ .reg = base_reg, .off = disp } },
.frame => |base_frame_index| .{ .lea_frame = .{ .index = base_frame_index, .off = disp } },
.reloc => |base_symbol| .{ .lea_symbol = .{ .sym = base_symbol.sym_index, .off = disp } },
.reloc => |sym_index| .{ .lea_symbol = .{ .sym_index = sym_index, .off = disp } },
};
switch (src_mcv) {
.none,
@ -15328,7 +15366,6 @@ fn genExternSymbolRef(
lib: ?[]const u8,
callee: []const u8,
) InnerError!void {
const atom_index = try self.owner.getSymbolIndex(self);
if (self.bin_file.cast(.coff)) |coff_file| {
const global_index = try coff_file.getGlobalSymbol(callee, lib);
_ = try self.addInst(.{
@ -15336,8 +15373,7 @@ fn genExternSymbolRef(
.ops = .import_reloc,
.data = .{ .rx = .{
.r1 = .rax,
.payload = try self.addExtra(bits.Symbol{
.atom_index = atom_index,
.payload = try self.addExtra(bits.SymbolOffset{
.sym_index = link.File.Coff.global_symbol_bit | global_index,
}),
} },
@ -15364,10 +15400,10 @@ fn genLazySymbolRef(
if (self.mod.pic) {
switch (tag) {
.lea, .call => try self.genSetReg(reg, Type.usize, .{
.lea_symbol = .{ .sym = sym_index },
.lea_symbol = .{ .sym_index = sym_index },
}, .{}),
.mov => try self.genSetReg(reg, Type.usize, .{
.load_symbol = .{ .sym = sym_index },
.load_symbol = .{ .sym_index = sym_index },
}, .{}),
else => unreachable,
}
@ -15376,19 +15412,13 @@ fn genLazySymbolRef(
.call => try self.asmRegister(.{ ._, .call }, reg),
else => unreachable,
}
} else {
const reloc = bits.Symbol{
.atom_index = try self.owner.getSymbolIndex(self),
.sym_index = sym_index,
};
switch (tag) {
.lea, .mov => try self.asmRegisterMemory(.{ ._, tag }, reg.to64(), .{
.base = .{ .reloc = reloc },
.mod = .{ .rm = .{ .size = .qword } },
}),
.call => try self.asmImmediate(.{ ._, .call }, Immediate.rel(reloc)),
else => unreachable,
}
} else switch (tag) {
.lea, .mov => try self.asmRegisterMemory(.{ ._, tag }, reg.to64(), .{
.base = .{ .reloc = sym_index },
.mod = .{ .rm = .{ .size = .qword } },
}),
.call => try self.asmImmediate(.{ ._, .call }, Immediate.rel(.{ .sym_index = sym_index })),
else => unreachable,
}
} else if (self.bin_file.cast(.plan9)) |p9_file| {
const atom_index = p9_file.getOrCreateAtomForLazySymbol(pt, lazy_sym) catch |err|
@ -15438,10 +15468,10 @@ fn genLazySymbolRef(
const sym = zo.symbols.items[sym_index];
switch (tag) {
.lea, .call => try self.genSetReg(reg, Type.usize, .{
.lea_symbol = .{ .sym = sym.nlist_idx },
.lea_symbol = .{ .sym_index = sym.nlist_idx },
}, .{}),
.mov => try self.genSetReg(reg, Type.usize, .{
.load_symbol = .{ .sym = sym.nlist_idx },
.load_symbol = .{ .sym_index = sym.nlist_idx },
}, .{}),
else => unreachable,
}
@ -18786,7 +18816,7 @@ fn resolveInst(self: *Self, ref: Air.Inst.Ref) InnerError!MCValue {
.{ .frame = frame_index },
0,
Type.usize,
.{ .lea_symbol = .{ .sym = tlv_sym } },
.{ .lea_symbol = .{ .sym_index = tlv_sym } },
.{},
);
break :init .{ .load_frame = .{ .index = frame_index } };
@ -18842,8 +18872,8 @@ fn genTypedValue(self: *Self, val: Value) InnerError!MCValue {
.undef => .undef,
.immediate => |imm| .{ .immediate = imm },
.memory => |addr| .{ .memory = addr },
.load_symbol => |sym_index| .{ .load_symbol = .{ .sym = sym_index } },
.lea_symbol => |sym_index| .{ .lea_symbol = .{ .sym = sym_index } },
.load_symbol => |sym_index| .{ .load_symbol = .{ .sym_index = sym_index } },
.lea_symbol => |sym_index| .{ .lea_symbol = .{ .sym_index = sym_index } },
.load_direct => |sym_index| .{ .load_direct = sym_index },
.lea_direct => |sym_index| .{ .lea_direct = sym_index },
.load_got => |sym_index| .{ .lea_got = sym_index },

247
src/arch/x86_64/Emit.zig
View File

@ -1,6 +1,8 @@
//! This file contains the functionality for emitting x86_64 MIR as machine code
air: Air,
lower: Lower,
atom_index: u32,
debug_output: DebugInfoOutput,
code: *std.ArrayList(u8),
@ -36,83 +38,84 @@ pub fn emitMir(emit: *Emit) Error!void {
}) switch (lowered_relocs[0].target) {
.inst => |target| try emit.relocs.append(emit.lower.allocator, .{
.source = start_offset,
.source_offset = end_offset - 4,
.target = target,
.offset = end_offset - 4,
.target_offset = lowered_relocs[0].off,
.length = @intCast(end_offset - start_offset),
}),
.linker_extern_fn => |symbol| if (emit.lower.bin_file.cast(.elf)) |elf_file| {
.linker_extern_fn => |sym_index| if (emit.lower.bin_file.cast(.elf)) |elf_file| {
// Add relocation to the decl.
const zo = elf_file.zigObjectPtr().?;
const atom_ptr = zo.symbol(symbol.atom_index).atom(elf_file).?;
const atom_ptr = zo.symbol(emit.atom_index).atom(elf_file).?;
const r_type = @intFromEnum(std.elf.R_X86_64.PLT32);
try atom_ptr.addReloc(elf_file, .{
.r_offset = end_offset - 4,
.r_info = (@as(u64, @intCast(symbol.sym_index)) << 32) | r_type,
.r_addend = -4,
.r_info = (@as(u64, @intCast(sym_index)) << 32) | r_type,
.r_addend = lowered_relocs[0].off - 4,
});
} else if (emit.lower.bin_file.cast(.macho)) |macho_file| {
// Add relocation to the decl.
const zo = macho_file.getZigObject().?;
const atom = zo.symbols.items[symbol.atom_index].getAtom(macho_file).?;
const atom = zo.symbols.items[emit.atom_index].getAtom(macho_file).?;
try atom.addReloc(macho_file, .{
.tag = .@"extern",
.offset = end_offset - 4,
.target = symbol.sym_index,
.addend = 0,
.target = sym_index,
.addend = lowered_relocs[0].off,
.type = .branch,
.meta = .{
.pcrel = true,
.has_subtractor = false,
.length = 2,
.symbolnum = @intCast(symbol.sym_index),
.symbolnum = @intCast(sym_index),
},
});
} else if (emit.lower.bin_file.cast(.coff)) |coff_file| {
// Add relocation to the decl.
const atom_index = coff_file.getAtomIndexForSymbol(
.{ .sym_index = symbol.atom_index, .file = null },
.{ .sym_index = emit.atom_index, .file = null },
).?;
const target = if (link.File.Coff.global_symbol_bit & symbol.sym_index != 0)
coff_file.getGlobalByIndex(link.File.Coff.global_symbol_mask & symbol.sym_index)
const target = if (link.File.Coff.global_symbol_bit & sym_index != 0)
coff_file.getGlobalByIndex(link.File.Coff.global_symbol_mask & sym_index)
else
link.File.Coff.SymbolWithLoc{ .sym_index = symbol.sym_index, .file = null };
link.File.Coff.SymbolWithLoc{ .sym_index = sym_index, .file = null };
try link.File.Coff.Atom.addRelocation(coff_file, atom_index, .{
.type = .direct,
.target = target,
.offset = end_offset - 4,
.addend = 0,
.addend = @intCast(lowered_relocs[0].off),
.pcrel = true,
.length = 2,
});
} else return emit.fail("TODO implement extern reloc for {s}", .{
@tagName(emit.lower.bin_file.tag),
}),
.linker_tlsld => |data| {
.linker_tlsld => |sym_index| {
const elf_file = emit.lower.bin_file.cast(.elf).?;
const zo = elf_file.zigObjectPtr().?;
const atom = zo.symbol(data.atom_index).atom(elf_file).?;
const atom = zo.symbol(emit.atom_index).atom(elf_file).?;
const r_type = @intFromEnum(std.elf.R_X86_64.TLSLD);
try atom.addReloc(elf_file, .{
.r_offset = end_offset - 4,
.r_info = (@as(u64, @intCast(data.sym_index)) << 32) | r_type,
.r_addend = -4,
.r_info = (@as(u64, @intCast(sym_index)) << 32) | r_type,
.r_addend = lowered_relocs[0].off - 4,
});
},
.linker_dtpoff => |data| {
.linker_dtpoff => |sym_index| {
const elf_file = emit.lower.bin_file.cast(.elf).?;
const zo = elf_file.zigObjectPtr().?;
const atom = zo.symbol(data.atom_index).atom(elf_file).?;
const atom = zo.symbol(emit.atom_index).atom(elf_file).?;
const r_type = @intFromEnum(std.elf.R_X86_64.DTPOFF32);
try atom.addReloc(elf_file, .{
.r_offset = end_offset - 4,
.r_info = (@as(u64, @intCast(data.sym_index)) << 32) | r_type,
.r_addend = 0,
.r_info = (@as(u64, @intCast(sym_index)) << 32) | r_type,
.r_addend = lowered_relocs[0].off,
});
},
.linker_reloc => |data| if (emit.lower.bin_file.cast(.elf)) |elf_file| {
.linker_reloc => |sym_index| if (emit.lower.bin_file.cast(.elf)) |elf_file| {
const zo = elf_file.zigObjectPtr().?;
const atom = zo.symbol(data.atom_index).atom(elf_file).?;
const sym = zo.symbol(data.sym_index);
const atom = zo.symbol(emit.atom_index).atom(elf_file).?;
const sym = zo.symbol(sym_index);
if (emit.lower.pic) {
const r_type: u32 = if (sym.flags.is_extern_ptr)
@intFromEnum(std.elf.R_X86_64.GOTPCREL)
@ -120,8 +123,8 @@ pub fn emitMir(emit: *Emit) Error!void {
@intFromEnum(std.elf.R_X86_64.PC32);
try atom.addReloc(elf_file, .{
.r_offset = end_offset - 4,
.r_info = (@as(u64, @intCast(data.sym_index)) << 32) | r_type,
.r_addend = -4,
.r_info = (@as(u64, @intCast(sym_index)) << 32) | r_type,
.r_addend = lowered_relocs[0].off - 4,
});
} else {
const r_type: u32 = if (sym.flags.is_tls)
@ -130,14 +133,14 @@ pub fn emitMir(emit: *Emit) Error!void {
@intFromEnum(std.elf.R_X86_64.@"32");
try atom.addReloc(elf_file, .{
.r_offset = end_offset - 4,
.r_info = (@as(u64, @intCast(data.sym_index)) << 32) | r_type,
.r_addend = 0,
.r_info = (@as(u64, @intCast(sym_index)) << 32) | r_type,
.r_addend = lowered_relocs[0].off,
});
}
} else if (emit.lower.bin_file.cast(.macho)) |macho_file| {
const zo = macho_file.getZigObject().?;
const atom = zo.symbols.items[data.atom_index].getAtom(macho_file).?;
const sym = &zo.symbols.items[data.sym_index];
const atom = zo.symbols.items[emit.atom_index].getAtom(macho_file).?;
const sym = &zo.symbols.items[sym_index];
const @"type": link.File.MachO.Relocation.Type = if (sym.flags.is_extern_ptr)
.got_load
else if (sym.flags.tlv)
@ -147,33 +150,33 @@ pub fn emitMir(emit: *Emit) Error!void {
try atom.addReloc(macho_file, .{
.tag = .@"extern",
.offset = @intCast(end_offset - 4),
.target = data.sym_index,
.addend = 0,
.target = sym_index,
.addend = lowered_relocs[0].off,
.type = @"type",
.meta = .{
.pcrel = true,
.has_subtractor = false,
.length = 2,
.symbolnum = @intCast(data.sym_index),
.symbolnum = @intCast(sym_index),
},
});
} else unreachable,
.linker_got,
.linker_direct,
.linker_import,
=> |symbol| if (emit.lower.bin_file.cast(.elf)) |_| {
=> |sym_index| if (emit.lower.bin_file.cast(.elf)) |_| {
unreachable;
} else if (emit.lower.bin_file.cast(.macho)) |_| {
unreachable;
} else if (emit.lower.bin_file.cast(.coff)) |coff_file| {
const atom_index = coff_file.getAtomIndexForSymbol(.{
.sym_index = symbol.atom_index,
.sym_index = emit.atom_index,
.file = null,
}).?;
const target = if (link.File.Coff.global_symbol_bit & symbol.sym_index != 0)
coff_file.getGlobalByIndex(link.File.Coff.global_symbol_mask & symbol.sym_index)
const target = if (link.File.Coff.global_symbol_bit & sym_index != 0)
coff_file.getGlobalByIndex(link.File.Coff.global_symbol_mask & sym_index)
else
link.File.Coff.SymbolWithLoc{ .sym_index = symbol.sym_index, .file = null };
link.File.Coff.SymbolWithLoc{ .sym_index = sym_index, .file = null };
try link.File.Coff.Atom.addRelocation(coff_file, atom_index, .{
.type = switch (lowered_relocs[0].target) {
.linker_got => .got,
@ -183,16 +186,15 @@ pub fn emitMir(emit: *Emit) Error!void {
},
.target = target,
.offset = @intCast(end_offset - 4),
.addend = 0,
.addend = @intCast(lowered_relocs[0].off),
.pcrel = true,
.length = 2,
});
} else if (emit.lower.bin_file.cast(.plan9)) |p9_file| {
const atom_index = symbol.atom_index;
try p9_file.addReloc(atom_index, .{ // TODO we may need to add a .type field to the relocs if they are .linker_got instead of just .linker_direct
.target = symbol.sym_index, // we set sym_index to just be the atom index
try p9_file.addReloc(emit.atom_index, .{ // TODO we may need to add a .type field to the relocs if they are .linker_got instead of just .linker_direct
.target = sym_index, // we set sym_index to just be the atom index
.offset = @intCast(end_offset - 4),
.addend = 0,
.addend = @intCast(lowered_relocs[0].off),
.type = .pcrel,
});
} else return emit.fail("TODO implement linker reloc for {s}", .{
@ -232,13 +234,151 @@ pub fn emitMir(emit: *Emit) Error!void {
.none => {},
}
},
.pseudo_dbg_inline_func => {
.pseudo_dbg_enter_inline_func => {
switch (emit.debug_output) {
.dwarf => |dw| {
log.debug("mirDbgInline (line={d}, col={d})", .{
log.debug("mirDbgEnterInline (line={d}, col={d})", .{
emit.prev_di_line, emit.prev_di_column,
});
try dw.setInlineFunc(mir_inst.data.func);
try dw.enterInlineFunc(mir_inst.data.func, emit.code.items.len, emit.prev_di_line, emit.prev_di_column);
},
.plan9 => {},
.none => {},
}
},
.pseudo_dbg_leave_inline_func => {
switch (emit.debug_output) {
.dwarf => |dw| {
log.debug("mirDbgLeaveInline (line={d}, col={d})", .{
emit.prev_di_line, emit.prev_di_column,
});
try dw.leaveInlineFunc(mir_inst.data.func, emit.code.items.len);
},
.plan9 => {},
.none => {},
}
},
.pseudo_dbg_local_a,
.pseudo_dbg_local_ai_s,
.pseudo_dbg_local_ai_u,
.pseudo_dbg_local_ai_64,
.pseudo_dbg_local_as,
.pseudo_dbg_local_aso,
.pseudo_dbg_local_aro,
.pseudo_dbg_local_af,
.pseudo_dbg_local_am,
=> {
switch (emit.debug_output) {
.dwarf => |dw| {
var loc_buf: [2]link.File.Dwarf.Loc = undefined;
const air_inst_index, const loc: link.File.Dwarf.Loc = switch (mir_inst.ops) {
else => unreachable,
.pseudo_dbg_local_a => .{ mir_inst.data.a.air_inst, .empty },
.pseudo_dbg_local_ai_s,
.pseudo_dbg_local_ai_u,
.pseudo_dbg_local_ai_64,
=> .{ mir_inst.data.ai.air_inst, .{ .stack_value = stack_value: {
loc_buf[0] = switch (emit.lower.imm(mir_inst.ops, mir_inst.data.ai.i)) {
.signed => |s| .{ .consts = s },
.unsigned => |u| .{ .constu = u },
};
break :stack_value &loc_buf[0];
} } },
.pseudo_dbg_local_as => .{ mir_inst.data.as.air_inst, .{ .addr = .{
.sym = mir_inst.data.as.sym_index,
} } },
.pseudo_dbg_local_aso => loc: {
const sym_off = emit.lower.mir.extraData(
bits.SymbolOffset,
mir_inst.data.ax.payload,
).data;
break :loc .{ mir_inst.data.ax.air_inst, .{ .plus = .{
sym: {
loc_buf[0] = .{ .addr = .{ .sym = sym_off.sym_index } };
break :sym &loc_buf[0];
},
off: {
loc_buf[1] = .{ .consts = sym_off.off };
break :off &loc_buf[1];
},
} } };
},
.pseudo_dbg_local_aro => loc: {
const air_off = emit.lower.mir.extraData(
Mir.AirOffset,
mir_inst.data.rx.payload,
).data;
break :loc .{ air_off.air_inst, .{ .plus = .{
reg: {
loc_buf[0] = .{ .breg = mir_inst.data.rx.r1.dwarfNum() };
break :reg &loc_buf[0];
},
off: {
loc_buf[1] = .{ .consts = air_off.off };
break :off &loc_buf[1];
},
} } };
},
.pseudo_dbg_local_af => loc: {
const reg_off = emit.lower.mir.resolveFrameAddr(emit.lower.mir.extraData(
bits.FrameAddr,
mir_inst.data.ax.payload,
).data);
break :loc .{ mir_inst.data.ax.air_inst, .{ .plus = .{
reg: {
loc_buf[0] = .{ .breg = reg_off.reg.dwarfNum() };
break :reg &loc_buf[0];
},
off: {
loc_buf[1] = .{ .consts = reg_off.off };
break :off &loc_buf[1];
},
} } };
},
.pseudo_dbg_local_am => loc: {
const mem = emit.lower.mem(mir_inst.data.ax.payload);
break :loc .{ mir_inst.data.ax.air_inst, .{ .plus = .{
base: {
loc_buf[0] = switch (mem.base()) {
.none => .{ .constu = 0 },
.reg => |reg| .{ .breg = reg.dwarfNum() },
.frame => unreachable,
.reloc => |sym_index| .{ .addr = .{ .sym = sym_index } },
};
break :base &loc_buf[0];
},
disp: {
loc_buf[1] = switch (mem.disp()) {
.signed => |s| .{ .consts = s },
.unsigned => |u| .{ .constu = u },
};
break :disp &loc_buf[1];
},
} } };
},
};
const ip = &emit.lower.bin_file.comp.module.?.intern_pool;
const air_inst = emit.air.instructions.get(@intFromEnum(air_inst_index));
const name: Air.NullTerminatedString = switch (air_inst.tag) {
else => unreachable,
.arg => air_inst.data.arg.name,
.dbg_var_ptr, .dbg_var_val, .dbg_arg_inline => @enumFromInt(air_inst.data.pl_op.payload),
};
try dw.genLocalDebugInfo(
switch (air_inst.tag) {
else => unreachable,
.arg, .dbg_arg_inline => .local_arg,
.dbg_var_ptr, .dbg_var_val => .local_var,
},
name.toSlice(emit.air),
switch (air_inst.tag) {
else => unreachable,
.arg => emit.air.typeOfIndex(air_inst_index, ip),
.dbg_var_ptr => emit.air.typeOf(air_inst.data.pl_op.operand, ip).childTypeIp(ip),
.dbg_var_val, .dbg_arg_inline => emit.air.typeOf(air_inst.data.pl_op.operand, ip),
},
loc,
);
},
.plan9 => {},
.none => {},
@ -268,10 +408,12 @@ fn fail(emit: *Emit, comptime format: []const u8, args: anytype) Error {
const Reloc = struct {
/// Offset of the instruction.
source: usize,
/// Offset of the relocation within the instruction.
source_offset: u32,
/// Target of the relocation.
target: Mir.Inst.Index,
/// Offset of the relocation within the instruction.
offset: u32,
/// Offset from the target instruction.
target_offset: i32,
/// Length of the instruction.
length: u5,
};
@ -284,8 +426,8 @@ fn fixupRelocs(emit: *Emit) Error!void {
for (emit.relocs.items) |reloc| {
const target = emit.code_offset_mapping.get(reloc.target) orelse
return emit.fail("JMP/CALL relocation target not found!", .{});
const disp = @as(i64, @intCast(target)) - @as(i64, @intCast(reloc.source + reloc.length));
mem.writeInt(i32, emit.code.items[reloc.offset..][0..4], @intCast(disp), .little);
const disp = @as(i64, @intCast(target)) - @as(i64, @intCast(reloc.source + reloc.length)) + reloc.target_offset;
std.mem.writeInt(i32, emit.code.items[reloc.source_offset..][0..4], @intCast(disp), .little);
}
}
@ -338,11 +480,12 @@ fn dbgAdvancePCAndLine(emit: *Emit, line: u32, column: u32) Error!void {
}
}
const bits = @import("bits.zig");
const link = @import("../../link.zig");
const log = std.log.scoped(.emit);
const mem = std.mem;
const std = @import("std");
const Air = @import("../../Air.zig");
const DebugInfoOutput = @import("../../codegen.zig").DebugInfoOutput;
const Emit = @This();
const Lower = @import("Lower.zig");

112
src/arch/x86_64/Lower.zig
View File

@ -4,10 +4,10 @@ bin_file: *link.File,
output_mode: std.builtin.OutputMode,
link_mode: std.builtin.LinkMode,
pic: bool,
allocator: Allocator,
allocator: std.mem.Allocator,
mir: Mir,
cc: std.builtin.CallingConvention,
err_msg: ?*ErrorMsg = null,
err_msg: ?*Zcu.ErrorMsg = null,
src_loc: Zcu.LazySrcLoc,
result_insts_len: u8 = undefined,
result_relocs_len: u8 = undefined,
@ -52,16 +52,17 @@ pub const Error = error{
pub const Reloc = struct {
lowered_inst_index: u8,
target: Target,
off: i32,
const Target = union(enum) {
inst: Mir.Inst.Index,
linker_reloc: bits.Symbol,
linker_tlsld: bits.Symbol,
linker_dtpoff: bits.Symbol,
linker_extern_fn: bits.Symbol,
linker_got: bits.Symbol,
linker_direct: bits.Symbol,
linker_import: bits.Symbol,
linker_reloc: u32,
linker_tlsld: u32,
linker_dtpoff: u32,
linker_extern_fn: u32,
linker_got: u32,
linker_direct: u32,
linker_import: u32,
};
};
@ -173,19 +174,19 @@ pub fn lowerMir(lower: *Lower, index: Mir.Inst.Index) Error!struct {
.pseudo_j_z_and_np_inst => {
assert(inst.data.inst.fixes == ._);
try lower.emit(.none, .jnz, &.{
.{ .imm = lower.reloc(.{ .inst = index + 1 }) },
.{ .imm = lower.reloc(.{ .inst = index + 1 }, 0) },
});
try lower.emit(.none, .jnp, &.{
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }) },
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }, 0) },
});
},
.pseudo_j_nz_or_p_inst => {
assert(inst.data.inst.fixes == ._);
try lower.emit(.none, .jnz, &.{
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }) },
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }, 0) },
});
try lower.emit(.none, .jp, &.{
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }) },
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }, 0) },
});
},
@ -195,7 +196,7 @@ pub fn lowerMir(lower: *Lower, index: Mir.Inst.Index) Error!struct {
.{ .imm = Immediate.s(@bitCast(inst.data.ri.i)) },
});
try lower.emit(.none, .jz, &.{
.{ .imm = lower.reloc(.{ .inst = index + 1 }) },
.{ .imm = lower.reloc(.{ .inst = index + 1 }, 0) },
});
try lower.emit(.none, .lea, &.{
.{ .reg = inst.data.ri.r1 },
@ -211,7 +212,7 @@ pub fn lowerMir(lower: *Lower, index: Mir.Inst.Index) Error!struct {
.{ .reg = inst.data.ri.r1.to32() },
});
try lower.emit(.none, .jmp, &.{
.{ .imm = lower.reloc(.{ .inst = index }) },
.{ .imm = lower.reloc(.{ .inst = index }, 0) },
});
assert(lower.result_insts_len == pseudo_probe_align_insts);
},
@ -257,7 +258,7 @@ pub fn lowerMir(lower: *Lower, index: Mir.Inst.Index) Error!struct {
.{ .imm = Immediate.s(page_size) },
});
try lower.emit(.none, .jae, &.{
.{ .imm = lower.reloc(.{ .inst = index }) },
.{ .imm = lower.reloc(.{ .inst = index }, 0) },
});
assert(lower.result_insts_len == pseudo_probe_adjust_loop_insts);
},
@ -267,7 +268,17 @@ pub fn lowerMir(lower: *Lower, index: Mir.Inst.Index) Error!struct {
.pseudo_dbg_prologue_end_none,
.pseudo_dbg_line_line_column,
.pseudo_dbg_epilogue_begin_none,
.pseudo_dbg_inline_func,
.pseudo_dbg_enter_inline_func,
.pseudo_dbg_leave_inline_func,
.pseudo_dbg_local_a,
.pseudo_dbg_local_ai_s,
.pseudo_dbg_local_ai_u,
.pseudo_dbg_local_ai_64,
.pseudo_dbg_local_as,
.pseudo_dbg_local_aso,
.pseudo_dbg_local_aro,
.pseudo_dbg_local_af,
.pseudo_dbg_local_am,
.pseudo_dead_none,
=> {},
else => unreachable,
@ -283,17 +294,18 @@ pub fn lowerMir(lower: *Lower, index: Mir.Inst.Index) Error!struct {
pub fn fail(lower: *Lower, comptime format: []const u8, args: anytype) Error {
@setCold(true);
assert(lower.err_msg == null);
lower.err_msg = try ErrorMsg.create(lower.allocator, lower.src_loc, format, args);
lower.err_msg = try Zcu.ErrorMsg.create(lower.allocator, lower.src_loc, format, args);
return error.LowerFail;
}
fn imm(lower: Lower, ops: Mir.Inst.Ops, i: u32) Immediate {
pub fn imm(lower: Lower, ops: Mir.Inst.Ops, i: u32) Immediate {
return switch (ops) {
.rri_s,
.ri_s,
.i_s,
.mi_s,
.rmi_s,
.pseudo_dbg_local_ai_s,
=> Immediate.s(@bitCast(i)),
.rrri,
@ -306,22 +318,26 @@ fn imm(lower: Lower, ops: Mir.Inst.Ops, i: u32) Immediate {
.mri,
.rrm,
.rrmi,
.pseudo_dbg_local_ai_u,
=> Immediate.u(i),
.ri64 => Immediate.u(lower.mir.extraData(Mir.Imm64, i).data.decode()),
.ri_64,
.pseudo_dbg_local_ai_64,
=> Immediate.u(lower.mir.extraData(Mir.Imm64, i).data.decode()),
else => unreachable,
};
}
fn mem(lower: Lower, payload: u32) Memory {
pub fn mem(lower: Lower, payload: u32) Memory {
return lower.mir.resolveFrameLoc(lower.mir.extraData(Mir.Memory, payload).data).decode();
}
fn reloc(lower: *Lower, target: Reloc.Target) Immediate {
fn reloc(lower: *Lower, target: Reloc.Target, off: i32) Immediate {
lower.result_relocs[lower.result_relocs_len] = .{
.lowered_inst_index = lower.result_insts_len,
.target = target,
.off = off,
};
lower.result_relocs_len += 1;
return Immediate.s(0);
@ -337,37 +353,36 @@ fn emit(lower: *Lower, prefix: Prefix, mnemonic: Mnemonic, ops: []const Operand)
else => op,
.mem => |mem_op| switch (mem_op.base()) {
else => op,
.reloc => |sym| op: {
.reloc => |sym_index| op: {
assert(prefix == .none);
assert(mem_op.sib.disp == 0);
assert(mem_op.sib.scale_index.scale == 0);
if (lower.bin_file.cast(.elf)) |elf_file| {
const zo = elf_file.zigObjectPtr().?;
const elf_sym = zo.symbol(sym.sym_index);
const elf_sym = zo.symbol(sym_index);
if (elf_sym.flags.is_tls) {
// TODO handle extern TLS vars, i.e., emit GD model
if (lower.pic) {
// Here, we currently assume local dynamic TLS vars, and so
// we emit LD model.
_ = lower.reloc(.{ .linker_tlsld = sym });
_ = lower.reloc(.{ .linker_tlsld = sym_index }, 0);
lower.result_insts[lower.result_insts_len] =
try Instruction.new(.none, .lea, &[_]Operand{
.{ .reg = .rdi },
.{ .mem = Memory.rip(mem_op.sib.ptr_size, 0) },
});
lower.result_insts_len += 1;
_ = lower.reloc(.{ .linker_extern_fn = .{
.atom_index = sym.atom_index,
.sym_index = try elf_file.getGlobalSymbol("__tls_get_addr", null),
} });
_ = lower.reloc(.{
.linker_extern_fn = try elf_file.getGlobalSymbol("__tls_get_addr", null),
}, 0);
lower.result_insts[lower.result_insts_len] =
try Instruction.new(.none, .call, &[_]Operand{
.{ .imm = Immediate.s(0) },
});
lower.result_insts_len += 1;
_ = lower.reloc(.{ .linker_dtpoff = sym });
_ = lower.reloc(.{ .linker_dtpoff = sym_index }, 0);
emit_mnemonic = .lea;
break :op .{ .mem = Memory.sib(mem_op.sib.ptr_size, .{
.base = .{ .reg = .rax },
@ -381,7 +396,7 @@ fn emit(lower: *Lower, prefix: Prefix, mnemonic: Mnemonic, ops: []const Operand)
.{ .mem = Memory.sib(.qword, .{ .base = .{ .reg = .fs } }) },
});
lower.result_insts_len += 1;
_ = lower.reloc(.{ .linker_reloc = sym });
_ = lower.reloc(.{ .linker_reloc = sym_index }, 0);
emit_mnemonic = .lea;
break :op .{ .mem = Memory.sib(mem_op.sib.ptr_size, .{
.base = .{ .reg = .rax },
@ -390,7 +405,7 @@ fn emit(lower: *Lower, prefix: Prefix, mnemonic: Mnemonic, ops: []const Operand)
}
}
_ = lower.reloc(.{ .linker_reloc = sym });
_ = lower.reloc(.{ .linker_reloc = sym_index }, 0);
if (lower.pic) switch (mnemonic) {
.lea => {
if (elf_sym.flags.is_extern_ptr) emit_mnemonic = .mov;
@ -427,10 +442,10 @@ fn emit(lower: *Lower, prefix: Prefix, mnemonic: Mnemonic, ops: []const Operand)
}
} else if (lower.bin_file.cast(.macho)) |macho_file| {
const zo = macho_file.getZigObject().?;
const macho_sym = zo.symbols.items[sym.sym_index];
const macho_sym = zo.symbols.items[sym_index];
if (macho_sym.flags.tlv) {
_ = lower.reloc(.{ .linker_reloc = sym });
_ = lower.reloc(.{ .linker_reloc = sym_index }, 0);
lower.result_insts[lower.result_insts_len] =
try Instruction.new(.none, .mov, &[_]Operand{
.{ .reg = .rdi },
@ -446,7 +461,7 @@ fn emit(lower: *Lower, prefix: Prefix, mnemonic: Mnemonic, ops: []const Operand)
break :op .{ .reg = .rax };
}
_ = lower.reloc(.{ .linker_reloc = sym });
_ = lower.reloc(.{ .linker_reloc = sym_index }, 0);
break :op switch (mnemonic) {
.lea => {
if (macho_sym.flags.is_extern_ptr) emit_mnemonic = .mov;
@ -490,8 +505,8 @@ fn generic(lower: *Lower, inst: Mir.Inst) Error!void {
.rrrr => inst.data.rrrr.fixes,
.rrri => inst.data.rrri.fixes,
.rri_s, .rri_u => inst.data.rri.fixes,
.ri_s, .ri_u => inst.data.ri.fixes,
.ri64, .rm, .rmi_s, .mr => inst.data.rx.fixes,
.ri_s, .ri_u, .ri_64 => inst.data.ri.fixes,
.rm, .rmi_s, .mr => inst.data.rx.fixes,
.mrr, .rrm, .rmr => inst.data.rrx.fixes,
.rmi, .mri => inst.data.rix.fixes,
.rrmr => inst.data.rrrx.fixes,
@ -525,7 +540,7 @@ fn generic(lower: *Lower, inst: Mir.Inst) Error!void {
}, switch (inst.ops) {
.none => &.{},
.inst => &.{
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }) },
.{ .imm = lower.reloc(.{ .inst = inst.data.inst.inst }, 0) },
},
.i_s, .i_u => &.{
.{ .imm = lower.imm(inst.ops, inst.data.i.i) },
@ -554,14 +569,10 @@ fn generic(lower: *Lower, inst: Mir.Inst) Error!void {
.{ .reg = inst.data.rrri.r3 },
.{ .imm = lower.imm(inst.ops, inst.data.rrri.i) },
},
.ri_s, .ri_u => &.{
.ri_s, .ri_u, .ri_64 => &.{
.{ .reg = inst.data.ri.r1 },
.{ .imm = lower.imm(inst.ops, inst.data.ri.i) },
},
.ri64 => &.{
.{ .reg = inst.data.rx.r1 },
.{ .imm = lower.imm(inst.ops, inst.data.rx.payload) },
},
.rri_s, .rri_u => &.{
.{ .reg = inst.data.rri.r1 },
.{ .reg = inst.data.rri.r2 },
@ -631,17 +642,17 @@ fn generic(lower: *Lower, inst: Mir.Inst) Error!void {
.{ .imm = lower.imm(inst.ops, inst.data.rrix.i) },
},
.extern_fn_reloc, .rel => &.{
.{ .imm = lower.reloc(.{ .linker_extern_fn = inst.data.reloc }) },
.{ .imm = lower.reloc(.{ .linker_extern_fn = inst.data.reloc.sym_index }, inst.data.reloc.off) },
},
.got_reloc, .direct_reloc, .import_reloc => ops: {
const reg = inst.data.rx.r1;
const extra = lower.mir.extraData(bits.Symbol, inst.data.rx.payload).data;
const extra = lower.mir.extraData(bits.SymbolOffset, inst.data.rx.payload).data;
_ = lower.reloc(switch (inst.ops) {
.got_reloc => .{ .linker_got = extra },
.direct_reloc => .{ .linker_direct = extra },
.import_reloc => .{ .linker_import = extra },
.got_reloc => .{ .linker_got = extra.sym_index },
.direct_reloc => .{ .linker_direct = extra.sym_index },
.import_reloc => .{ .linker_import = extra.sym_index },
else => unreachable,
});
}, extra.off);
break :ops &.{
.{ .reg = reg },
.{ .mem = Memory.rip(Memory.PtrSize.fromBitSize(reg.bitSize()), 0) },
@ -670,9 +681,6 @@ const encoder = @import("encoder.zig");
const link = @import("../../link.zig");
const std = @import("std");
const Air = @import("../../Air.zig");
const Allocator = std.mem.Allocator;
const ErrorMsg = Zcu.ErrorMsg;
const Immediate = Instruction.Immediate;
const Instruction = encoder.Instruction;
const Lower = @This();

94
src/arch/x86_64/Mir.zig
View File

@ -760,8 +760,8 @@ pub const Inst = struct {
/// Uses `ri` payload.
ri_u,
/// Register, 64-bit unsigned immediate operands.
/// Uses `rx` payload with payload type `Imm64`.
ri64,
/// Uses `ri` payload with `i` index of extra data of type `Imm64`.
ri_64,
/// Immediate (sign-extended) operand.
/// Uses `imm` payload.
i_s,
@ -796,7 +796,7 @@ pub const Inst = struct {
/// Uses `rrix` payload with extra data of type `Memory`.
rrmi,
/// Single memory operand.
/// Uses `x` with extra data of type `Memory`.
/// Uses `x` payload with extra data of type `Memory`.
m,
/// Memory, immediate (sign-extend) operands.
/// Uses `x` payload with extra data of type `Imm32` followed by `Memory`.
@ -820,16 +820,16 @@ pub const Inst = struct {
/// Uses `reloc` payload.
extern_fn_reloc,
/// Linker relocation - GOT indirection.
/// Uses `rx` payload with extra data of type `bits.Symbol`.
/// Uses `rx` payload with extra data of type `bits.SymbolOffset`.
got_reloc,
/// Linker relocation - direct reference.
/// Uses `rx` payload with extra data of type `bits.Symbol`.
/// Uses `rx` payload with extra data of type `bits.SymbolOffset`.
direct_reloc,
/// Linker relocation - imports table indirection (binding).
/// Uses `rx` payload with extra data of type `bits.Symbol`.
/// Uses `rx` payload with extra data of type `bits.SymbolOffset`.
import_reloc,
/// Linker relocation - threadlocal variable via GOT indirection.
/// Uses `rx` payload with extra data of type `bits.Symbol`.
/// Uses `rx` payload with extra data of type `bits.SymbolOffset`.
tlv_reloc,
// Pseudo instructions:
@ -868,16 +868,16 @@ pub const Inst = struct {
pseudo_j_nz_or_p_inst,
/// Probe alignment
/// Uses `ri` payload
/// Uses `ri` payload.
pseudo_probe_align_ri_s,
/// Probe adjust unrolled
/// Uses `ri` payload
/// Uses `ri` payload.
pseudo_probe_adjust_unrolled_ri_s,
/// Probe adjust setup
/// Uses `rri` payload
/// Uses `rri` payload.
pseudo_probe_adjust_setup_rri_s,
/// Probe adjust loop
/// Uses `rr` payload
/// Uses `rr` payload.
pseudo_probe_adjust_loop_rr,
/// Push registers
/// Uses `reg_list` payload.
@ -893,8 +893,37 @@ pub const Inst = struct {
pseudo_dbg_line_line_column,
/// Start of epilogue
pseudo_dbg_epilogue_begin_none,
/// Start or end of inline function
pseudo_dbg_inline_func,
/// Start of inline function
pseudo_dbg_enter_inline_func,
/// End of inline function
pseudo_dbg_leave_inline_func,
/// Local argument or variable.
/// Uses `a` payload.
pseudo_dbg_local_a,
/// Local argument or variable.
/// Uses `ai` payload.
pseudo_dbg_local_ai_s,
/// Local argument or variable.
/// Uses `ai` payload.
pseudo_dbg_local_ai_u,
/// Local argument or variable.
/// Uses `ai` payload with extra data of type `Imm64`.
pseudo_dbg_local_ai_64,
/// Local argument or variable.
/// Uses `as` payload.
pseudo_dbg_local_as,
/// Local argument or variable.
/// Uses `ax` payload with extra data of type `bits.SymbolOffset`.
pseudo_dbg_local_aso,
/// Local argument or variable.
/// Uses `rx` payload with extra data of type `AirOffset`.
pseudo_dbg_local_aro,
/// Local argument or variable.
/// Uses `ax` payload with extra data of type `bits.FrameAddr`.
pseudo_dbg_local_af,
/// Local argument or variable.
/// Uses `ax` payload with extra data of type `Memory`.
pseudo_dbg_local_am,
/// Tombstone
/// Emitter should skip this instruction.
@ -997,10 +1026,28 @@ pub const Inst = struct {
fixes: Fixes = ._,
payload: u32,
},
ix: struct {
payload: u32,
},
a: struct {
air_inst: Air.Inst.Index,
},
ai: struct {
air_inst: Air.Inst.Index,
i: u32,
},
as: struct {
air_inst: Air.Inst.Index,
sym_index: u32,
},
ax: struct {
air_inst: Air.Inst.Index,
payload: u32,
},
/// Relocation for the linker where:
/// * `atom_index` is the index of the source
/// * `sym_index` is the index of the target
reloc: bits.Symbol,
/// * `off` is the offset from the target
reloc: bits.SymbolOffset,
/// Debug line and column position
line_column: struct {
line: u32,
@ -1020,6 +1067,8 @@ pub const Inst = struct {
}
};
pub const AirOffset = struct { air_inst: Air.Inst.Index, off: i32 };
/// Used in conjunction with payload to transfer a list of used registers in a compact manner.
pub const RegisterList = struct {
bitset: BitSet = BitSet.initEmpty(),
@ -1118,15 +1167,13 @@ pub const Memory = struct {
.none => undefined,
.reg => |reg| @intFromEnum(reg),
.frame => |frame_index| @intFromEnum(frame_index),
.reloc => |symbol| symbol.sym_index,
.reloc => |sym_index| sym_index,
},
.off = switch (mem.mod) {
.rm => |rm| @bitCast(rm.disp),
.off => |off| @truncate(off),
},
.extra = if (mem.base == .reloc)
mem.base.reloc.atom_index
else if (mem.mod == .off)
.extra = if (mem.mod == .off)
@intCast(mem.mod.off >> 32)
else
undefined,
@ -1146,7 +1193,7 @@ pub const Memory = struct {
.none => .none,
.reg => .{ .reg = @enumFromInt(mem.base) },
.frame => .{ .frame = @enumFromInt(mem.base) },
.reloc => .{ .reloc = .{ .atom_index = mem.extra, .sym_index = mem.base } },
.reloc => .{ .reloc = mem.base },
},
.scale_index = switch (mem.info.index) {
.none => null,
@ -1186,6 +1233,7 @@ pub fn extraData(mir: Mir, comptime T: type, index: u32) struct { data: T, end:
@field(result, field.name) = switch (field.type) {
u32 => mir.extra[i],
i32, Memory.Info => @bitCast(mir.extra[i]),
bits.FrameIndex, Air.Inst.Index => @enumFromInt(mir.extra[i]),
else => @compileError("bad field type: " ++ field.name ++ ": " ++ @typeName(field.type)),
};
i += 1;
@ -1201,6 +1249,11 @@ pub const FrameLoc = struct {
disp: i32,
};
pub fn resolveFrameAddr(mir: Mir, frame_addr: bits.FrameAddr) bits.RegisterOffset {
const frame_loc = mir.frame_locs.get(@intFromEnum(frame_addr.index));
return .{ .reg = frame_loc.base, .off = frame_loc.disp + frame_addr.off };
}
pub fn resolveFrameLoc(mir: Mir, mem: Memory) Memory {
return switch (mem.info.base) {
.none, .reg, .reloc => mem,
@ -1225,6 +1278,7 @@ const builtin = @import("builtin");
const encoder = @import("encoder.zig");
const std = @import("std");
const Air = @import("../../Air.zig");
const IntegerBitSet = std.bit_set.IntegerBitSet;
const InternPool = @import("../../InternPool.zig");
const Mir = @This();

39
src/arch/x86_64/bits.zig
View File

@ -447,26 +447,11 @@ pub const FrameIndex = enum(u32) {
}
};
/// A linker symbol not yet allocated in VM.
pub const Symbol = struct {
/// Index of the containing atom.
atom_index: u32,
/// Index into the linker's symbol table.
sym_index: u32,
pub const FrameAddr = struct { index: FrameIndex, off: i32 = 0 };
pub fn format(
sym: Symbol,
comptime fmt: []const u8,
options: std.fmt.FormatOptions,
writer: anytype,
) @TypeOf(writer).Error!void {
try writer.writeAll("Symbol(");
try std.fmt.formatType(sym.atom_index, fmt, options, writer, 0);
try writer.writeAll(", ");
try std.fmt.formatType(sym.sym_index, fmt, options, writer, 0);
try writer.writeByte(')');
}
};
pub const RegisterOffset = struct { reg: Register, off: i32 = 0 };
pub const SymbolOffset = struct { sym_index: u32, off: i32 = 0 };
pub const Memory = struct {
base: Base,
@ -476,7 +461,7 @@ pub const Memory = struct {
none,
reg: Register,
frame: FrameIndex,
reloc: Symbol,
reloc: u32,
pub const Tag = @typeInfo(Base).Union.tag_type.?;
@ -568,7 +553,7 @@ pub const Memory = struct {
pub const Immediate = union(enum) {
signed: i32,
unsigned: u64,
reloc: Symbol,
reloc: SymbolOffset,
pub fn u(x: u64) Immediate {
return .{ .unsigned = x };
@ -578,19 +563,19 @@ pub const Immediate = union(enum) {
return .{ .signed = x };
}
pub fn rel(symbol: Symbol) Immediate {
return .{ .reloc = symbol };
pub fn rel(sym_off: SymbolOffset) Immediate {
return .{ .reloc = sym_off };
}
pub fn format(
imm: Immediate,
comptime fmt: []const u8,
options: std.fmt.FormatOptions,
comptime _: []const u8,
_: std.fmt.FormatOptions,
writer: anytype,
) @TypeOf(writer).Error!void {
switch (imm) {
.reloc => |x| try std.fmt.formatType(x, fmt, options, writer, 0),
inline else => |x| try writer.print("{d}", .{x}),
inline else => |int| try writer.print("{d}", .{int}),
.reloc => |sym_off| try writer.print("Symbol({[sym_index]d}) + {[off]d}", sym_off),
}
}
};

27
src/arch/x86_64/encoder.zig
View File

@ -128,8 +128,8 @@ pub const Instruction = struct {
} };
}
pub fn rip(ptr_size: PtrSize, disp: i32) Memory {
return .{ .rip = .{ .ptr_size = ptr_size, .disp = disp } };
pub fn rip(ptr_size: PtrSize, displacement: i32) Memory {
return .{ .rip = .{ .ptr_size = ptr_size, .disp = displacement } };
}
pub fn isSegmentRegister(mem: Memory) bool {
@ -158,6 +158,14 @@ pub const Instruction = struct {
};
}
pub fn disp(mem: Memory) Immediate {
return switch (mem) {
.sib => |s| Immediate.s(s.disp),
.rip => |r| Immediate.s(r.disp),
.moffs => |m| Immediate.u(m.offset),
};
}
pub fn bitSize(mem: Memory) u64 {
return switch (mem) {
.rip => |r| r.ptr_size.bitSize(),
@ -258,17 +266,12 @@ pub const Instruction = struct {
try writer.writeByte('[');
var any = false;
var any = true;
switch (sib.base) {
.none => {},
.reg => |reg| {
try writer.print("{s}", .{@tagName(reg)});
any = true;
},
inline .frame, .reloc => |payload| {
try writer.print("{}", .{payload});
any = true;
},
.none => any = false,
.reg => |reg| try writer.print("{s}", .{@tagName(reg)}),
.frame => |frame_index| try writer.print("{}", .{frame_index}),
.reloc => |sym_index| try writer.print("Symbol({d})", .{sym_index}),
}
if (mem.scaleIndex()) |si| {
if (any) try writer.writeAll(" + ");

7
src/codegen/c.zig
View File

@ -3293,7 +3293,7 @@ fn genBodyInner(f: *Function, body: []const Air.Inst.Index) error{ AnalysisFail,
.dbg_stmt => try airDbgStmt(f, inst),
.dbg_inline_block => try airDbgInlineBlock(f, inst),
.dbg_var_ptr, .dbg_var_val => try airDbgVar(f, inst),
.dbg_var_ptr, .dbg_var_val, .dbg_arg_inline => try airDbgVar(f, inst),
.call => try airCall(f, inst, .auto),
.call_always_tail => .none,
@ -4590,14 +4590,15 @@ fn airDbgInlineBlock(f: *Function, inst: Air.Inst.Index) !CValue {
fn airDbgVar(f: *Function, inst: Air.Inst.Index) !CValue {
const pt = f.object.dg.pt;
const zcu = pt.zcu;
const tag = f.air.instructions.items(.tag)[@intFromEnum(inst)];
const pl_op = f.air.instructions.items(.data)[@intFromEnum(inst)].pl_op;
const name = f.air.nullTerminatedString(pl_op.payload);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
const operand_is_undef = if (try f.air.value(pl_op.operand, pt)) |v| v.isUndefDeep(zcu) else false;
if (!operand_is_undef) _ = try f.resolveInst(pl_op.operand);
try reap(f, inst, &.{pl_op.operand});
const writer = f.object.writer();
try writer.print("/* var:{s} */\n", .{name});
try writer.print("/* {s}:{s} */\n", .{ @tagName(tag), name.toSlice(f.air) });
return .none;
}

34
src/codegen/llvm.zig
View File

@ -1665,6 +1665,7 @@ pub const Object = struct {
.ret_ptr = ret_ptr,
.args = args.items,
.arg_index = 0,
.arg_inline_index = 0,
.func_inst_table = .{},
.blocks = .{},
.sync_scope = if (owner_mod.single_threaded) .singlethread else .system,
@ -4769,7 +4770,8 @@ pub const FuncGen = struct {
/// it omits 0-bit types. If the function uses sret as the first parameter,
/// this slice does not include it.
args: []const Builder.Value,
arg_index: usize,
arg_index: u32,
arg_inline_index: u32,
err_ret_trace: Builder.Value = .none,
@ -5082,7 +5084,8 @@ pub const FuncGen = struct {
.dbg_stmt => try self.airDbgStmt(inst),
.dbg_inline_block => try self.airDbgInlineBlock(inst),
.dbg_var_ptr => try self.airDbgVarPtr(inst),
.dbg_var_val => try self.airDbgVarVal(inst),
.dbg_var_val => try self.airDbgVarVal(inst, false),
.dbg_arg_inline => try self.airDbgVarVal(inst, true),
.c_va_arg => try self.airCVaArg(inst),
.c_va_copy => try self.airCVaCopy(inst),
@ -6677,6 +6680,7 @@ pub const FuncGen = struct {
fn airDbgInlineBlock(self: *FuncGen, inst: Air.Inst.Index) !Builder.Value {
const ty_pl = self.air.instructions.items(.data)[@intFromEnum(inst)].ty_pl;
const extra = self.air.extraData(Air.DbgInlineBlock, ty_pl.payload);
self.arg_inline_index = 0;
return self.lowerBlock(inst, extra.data.func, @ptrCast(self.air.extra[extra.end..][0..extra.data.body_len]));
}
@ -6685,11 +6689,11 @@ pub const FuncGen = struct {
const mod = o.pt.zcu;
const pl_op = self.air.instructions.items(.data)[@intFromEnum(inst)].pl_op;
const operand = try self.resolveInst(pl_op.operand);
const name = self.air.nullTerminatedString(pl_op.payload);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
const ptr_ty = self.typeOf(pl_op.operand);
const debug_local_var = try o.builder.debugLocalVar(
try o.builder.metadataString(name),
try o.builder.metadataString(name.toSlice(self.air)),
self.file,
self.scope,
self.prev_dbg_line,
@ -6712,15 +6716,25 @@ pub const FuncGen = struct {
return .none;
}
fn airDbgVarVal(self: *FuncGen, inst: Air.Inst.Index) !Builder.Value {
fn airDbgVarVal(self: *FuncGen, inst: Air.Inst.Index, is_arg: bool) !Builder.Value {
const o = self.ng.object;
const pl_op = self.air.instructions.items(.data)[@intFromEnum(inst)].pl_op;
const operand = try self.resolveInst(pl_op.operand);
const operand_ty = self.typeOf(pl_op.operand);
const name = self.air.nullTerminatedString(pl_op.payload);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
const debug_local_var = try o.builder.debugLocalVar(
try o.builder.metadataString(name),
const debug_local_var = if (is_arg) try o.builder.debugParameter(
try o.builder.metadataString(name.toSlice(self.air)),
self.file,
self.scope,
self.prev_dbg_line,
try o.lowerDebugType(operand_ty),
arg_no: {
self.arg_inline_index += 1;
break :arg_no self.arg_inline_index;
},
) else try o.builder.debugLocalVar(
try o.builder.metadataString(name.toSlice(self.air)),
self.file,
self.scope,
self.prev_dbg_line,
@ -8835,12 +8849,12 @@ pub const FuncGen = struct {
const lbrace_col = func.lbrace_column + 1;
const debug_parameter = try o.builder.debugParameter(
try o.builder.metadataString(self.air.nullTerminatedString(@intFromEnum(name))),
try o.builder.metadataString(name.toSlice(self.air)),
self.file,
self.scope,
lbrace_line,
try o.lowerDebugType(inst_ty),
@intCast(self.arg_index),
self.arg_index,
);
const old_location = self.wip.debug_location;

4
src/codegen/spirv.zig
View File

@ -6366,8 +6366,8 @@ const NavGen = struct {
fn airDbgVar(self: *NavGen, inst: Air.Inst.Index) !void {
const pl_op = self.air.instructions.items(.data)[@intFromEnum(inst)].pl_op;
const target_id = try self.resolve(pl_op.operand);
const name = self.air.nullTerminatedString(pl_op.payload);
try self.spv.debugName(target_id, name);
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
try self.spv.debugName(target_id, name.toSlice(self.air));
}
fn airAssembly(self: *NavGen, inst: Air.Inst.Index) !?IdRef {

12
src/link/C.zig
View File

@ -317,8 +317,18 @@ pub fn updateNav(self: *C, pt: Zcu.PerThread, nav_index: InternPool.Nav.Index) !
defer tracy.end();
const gpa = self.base.comp.gpa;
const zcu = pt.zcu;
const ip = &zcu.intern_pool;
const nav = ip.getNav(nav_index);
const nav_init = switch (ip.indexToKey(nav.status.resolved.val)) {
.func => return,
.@"extern" => .none,
.variable => |variable| variable.init,
else => nav.status.resolved.val,
};
if (nav_init != .none and !Value.fromInterned(nav_init).typeOf(zcu).hasRuntimeBits(pt)) return;
const gop = try self.navs.getOrPut(gpa, nav_index);
errdefer _ = self.navs.pop();
if (!gop.found_existing) gop.value_ptr.* = .{};

3
src/link/Coff.zig
View File

@ -1207,6 +1207,7 @@ pub fn updateNav(
const nav_val = zcu.navValue(nav_index);
const nav_init = switch (ip.indexToKey(nav_val.toIntern())) {
.func => return,
.variable => |variable| Value.fromInterned(variable.init),
.@"extern" => |@"extern"| {
if (ip.isFunctionType(@"extern".ty)) return;
@ -1220,7 +1221,7 @@ pub fn updateNav(
else => nav_val,
};
if (nav_init.typeOf(zcu).isFnOrHasRuntimeBits(pt)) {
if (nav_init.typeOf(zcu).hasRuntimeBits(pt)) {
const atom_index = try self.getOrCreateAtomForNav(nav_index);
Atom.freeRelocations(self, atom_index);
const atom = self.getAtom(atom_index);

489
src/link/Dwarf.zig
View File

@ -21,8 +21,9 @@ pub const UpdateError =
std.fs.File.OpenError ||
std.fs.File.SetEndPosError ||
std.fs.File.CopyRangeError ||
std.fs.File.PReadError ||
std.fs.File.PWriteError ||
error{ Overflow, Underflow, UnexpectedEndOfFile };
error{ EndOfStream, Overflow, Underflow, UnexpectedEndOfFile };
pub const FlushError =
UpdateError ||
@ -253,10 +254,8 @@ const Section = struct {
.trailer_len = trailer_len,
.len = header_len + trailer_len,
.entries = .{},
.cross_entry_relocs = .{},
.cross_unit_relocs = .{},
.cross_section_relocs = .{},
.external_relocs = .{},
};
if (sec.last.unwrap()) |last_unit| {
const last_unit_ptr = sec.getUnit(last_unit);
@ -358,10 +357,8 @@ const Unit = struct {
/// data length in bytes
len: u32,
entries: std.ArrayListUnmanaged(Entry),
cross_entry_relocs: std.ArrayListUnmanaged(CrossEntryReloc),
cross_unit_relocs: std.ArrayListUnmanaged(CrossUnitReloc),
cross_section_relocs: std.ArrayListUnmanaged(CrossSectionReloc),
external_relocs: std.ArrayListUnmanaged(ExternalReloc),
const Index = enum(u32) {
main,
@ -381,12 +378,16 @@ const Unit = struct {
}
};
fn clear(unit: *Unit) void {
unit.cross_unit_relocs.clearRetainingCapacity();
unit.cross_section_relocs.clearRetainingCapacity();
}
fn deinit(unit: *Unit, gpa: std.mem.Allocator) void {
for (unit.entries.items) |*entry| entry.deinit(gpa);
unit.entries.deinit(gpa);
unit.cross_entry_relocs.deinit(gpa);
unit.cross_unit_relocs.deinit(gpa);
unit.cross_section_relocs.deinit(gpa);
unit.external_relocs.deinit(gpa);
unit.* = undefined;
}
@ -398,6 +399,10 @@ const Unit = struct {
.next = .none,
.off = 0,
.len = 0,
.cross_entry_relocs = .{},
.cross_unit_relocs = .{},
.cross_section_relocs = .{},
.external_relocs = .{},
};
if (unit.last.unwrap()) |last_entry| {
const last_entry_ptr = unit.getEntry(last_entry);
@ -451,6 +456,14 @@ const Unit = struct {
unit_ptr.len = len;
}
fn trim(unit: *Unit) void {
const len = unit.getEntry(unit.first.unwrap() orelse return).off;
if (len == 0) return;
for (unit.entries.items) |*entry| entry.off -= len;
unit.off += len;
unit.len -= len;
}
fn move(unit: *Unit, sec: *Section, dwarf: *Dwarf, new_off: u32) UpdateError!void {
if (unit.off == new_off) return;
if (try dwarf.getFile().?.copyRangeAll(
@ -463,6 +476,7 @@ const Unit = struct {
}
fn resizeHeader(unit: *Unit, sec: *Section, dwarf: *Dwarf, len: u32) UpdateError!void {
unit.trim();
if (unit.header_len == len) return;
const available_len = if (unit.prev.unwrap()) |prev_unit| prev_excess: {
const prev_unit_ptr = sec.getUnit(prev_unit);
@ -535,23 +549,11 @@ const Unit = struct {
}
fn resolveRelocs(unit: *Unit, sec: *Section, dwarf: *Dwarf) RelocError!void {
for (unit.cross_entry_relocs.items) |reloc| {
try dwarf.resolveReloc(
sec.off + unit.off + (if (reloc.source_entry.unwrap()) |source_entry|
unit.header_len + unit.getEntry(source_entry).off
else
0) + reloc.source_off,
unit.off + unit.header_len + unit.getEntry(reloc.target_entry).assertNonEmpty(unit, sec, dwarf).off + reloc.target_off,
dwarf.sectionOffsetBytes(),
);
}
const unit_off = sec.off + unit.off;
for (unit.cross_unit_relocs.items) |reloc| {
const target_unit = sec.getUnit(reloc.target_unit);
try dwarf.resolveReloc(
sec.off + unit.off + (if (reloc.source_entry.unwrap()) |source_entry|
unit.header_len + unit.getEntry(source_entry).off
else
0) + reloc.source_off,
unit_off + reloc.source_off,
target_unit.off + (if (reloc.target_entry.unwrap()) |target_entry|
target_unit.header_len + target_unit.getEntry(target_entry).assertNonEmpty(unit, sec, dwarf).off
else
@ -565,10 +567,7 @@ const Unit = struct {
};
const target_unit = target_sec.getUnit(reloc.target_unit);
try dwarf.resolveReloc(
sec.off + unit.off + (if (reloc.source_entry.unwrap()) |source_entry|
unit.header_len + unit.getEntry(source_entry).off
else
0) + reloc.source_off,
unit_off + reloc.source_off,
target_unit.off + (if (reloc.target_entry.unwrap()) |target_entry|
target_unit.header_len + target_unit.getEntry(target_entry).assertNonEmpty(unit, sec, dwarf).off
else
@ -576,57 +575,8 @@ const Unit = struct {
dwarf.sectionOffsetBytes(),
);
}
if (dwarf.bin_file.cast(.elf)) |elf_file| {
const zo = elf_file.zigObjectPtr().?;
for (unit.external_relocs.items) |reloc| {
const symbol = zo.symbol(reloc.target_sym);
try dwarf.resolveReloc(
sec.off + unit.off + unit.header_len + unit.getEntry(reloc.source_entry).off + reloc.source_off,
@bitCast(symbol.address(.{}, elf_file) + @as(i64, @intCast(reloc.target_off)) -
if (symbol.flags.is_tls) elf_file.dtpAddress() else 0),
@intFromEnum(dwarf.address_size),
);
}
} else if (dwarf.bin_file.cast(.macho)) |macho_file| {
const zo = macho_file.getZigObject().?;
for (unit.external_relocs.items) |reloc| {
const ref = zo.getSymbolRef(reloc.target_sym, macho_file);
try dwarf.resolveReloc(
sec.off + unit.off + unit.header_len + unit.getEntry(reloc.source_entry).off + reloc.source_off,
ref.getSymbol(macho_file).?.getAddress(.{}, macho_file),
@intFromEnum(dwarf.address_size),
);
}
}
for (unit.entries.items) |*entry| try entry.resolveRelocs(unit, sec, dwarf);
}
const CrossEntryReloc = struct {
source_entry: Entry.Index.Optional = .none,
source_off: u32 = 0,
target_entry: Entry.Index,
target_off: u32 = 0,
};
const CrossUnitReloc = struct {
source_entry: Entry.Index.Optional = .none,
source_off: u32 = 0,
target_unit: Unit.Index,
target_entry: Entry.Index.Optional = .none,
target_off: u32 = 0,
};
const CrossSectionReloc = struct {
source_entry: Entry.Index.Optional = .none,
source_off: u32 = 0,
target_sec: Section.Index,
target_unit: Unit.Index,
target_entry: Entry.Index.Optional = .none,
target_off: u32 = 0,
};
const ExternalReloc = struct {
source_entry: Entry.Index,
source_off: u32 = 0,
target_sym: u32,
target_off: u64 = 0,
};
};
/// An indivisible entry within a `Unit` containing section-specific data.
@ -637,6 +587,25 @@ const Entry = struct {
off: u32,
/// data length in bytes
len: u32,
cross_entry_relocs: std.ArrayListUnmanaged(CrossEntryReloc),
cross_unit_relocs: std.ArrayListUnmanaged(CrossUnitReloc),
cross_section_relocs: std.ArrayListUnmanaged(CrossSectionReloc),
external_relocs: std.ArrayListUnmanaged(ExternalReloc),
fn clear(entry: *Entry) void {
entry.cross_entry_relocs.clearRetainingCapacity();
entry.cross_unit_relocs.clearRetainingCapacity();
entry.cross_section_relocs.clearRetainingCapacity();
entry.external_relocs.clearRetainingCapacity();
}
fn deinit(entry: *Entry, gpa: std.mem.Allocator) void {
entry.cross_entry_relocs.deinit(gpa);
entry.cross_unit_relocs.deinit(gpa);
entry.cross_section_relocs.deinit(gpa);
entry.external_relocs.deinit(gpa);
entry.* = undefined;
}
const Index = enum(u32) {
_,
@ -803,6 +772,88 @@ const Entry = struct {
}
@panic("missing dwarf relocation target");
}
fn resolveRelocs(entry: *Entry, unit: *Unit, sec: *Section, dwarf: *Dwarf) RelocError!void {
const entry_off = sec.off + unit.off + unit.header_len + entry.off;
for (entry.cross_entry_relocs.items) |reloc| {
try dwarf.resolveReloc(
entry_off + reloc.source_off,
unit.off + unit.header_len + unit.getEntry(reloc.target_entry).assertNonEmpty(unit, sec, dwarf).off + reloc.target_off,
dwarf.sectionOffsetBytes(),
);
}
for (entry.cross_unit_relocs.items) |reloc| {
const target_unit = sec.getUnit(reloc.target_unit);
try dwarf.resolveReloc(
entry_off + reloc.source_off,
target_unit.off + (if (reloc.target_entry.unwrap()) |target_entry|
target_unit.header_len + target_unit.getEntry(target_entry).assertNonEmpty(unit, sec, dwarf).off
else
0) + reloc.target_off,
dwarf.sectionOffsetBytes(),
);
}
for (entry.cross_section_relocs.items) |reloc| {
const target_sec = switch (reloc.target_sec) {
inline else => |target_sec| &@field(dwarf, @tagName(target_sec)).section,
};
const target_unit = target_sec.getUnit(reloc.target_unit);
try dwarf.resolveReloc(
entry_off + reloc.source_off,
target_unit.off + (if (reloc.target_entry.unwrap()) |target_entry|
target_unit.header_len + target_unit.getEntry(target_entry).assertNonEmpty(unit, sec, dwarf).off
else
0) + reloc.target_off,
dwarf.sectionOffsetBytes(),
);
}
if (dwarf.bin_file.cast(.elf)) |elf_file| {
const zo = elf_file.zigObjectPtr().?;
for (entry.external_relocs.items) |reloc| {
const symbol = zo.symbol(reloc.target_sym);
try dwarf.resolveReloc(
entry_off + reloc.source_off,
@bitCast(symbol.address(.{}, elf_file) + @as(i64, @intCast(reloc.target_off)) -
if (symbol.flags.is_tls) elf_file.dtpAddress() else 0),
@intFromEnum(dwarf.address_size),
);
}
} else if (dwarf.bin_file.cast(.macho)) |macho_file| {
const zo = macho_file.getZigObject().?;
for (entry.external_relocs.items) |reloc| {
const ref = zo.getSymbolRef(reloc.target_sym, macho_file);
try dwarf.resolveReloc(
entry_off + reloc.source_off,
ref.getSymbol(macho_file).?.getAddress(.{}, macho_file),
@intFromEnum(dwarf.address_size),
);
}
}
}
};
const CrossEntryReloc = struct {
source_off: u32 = 0,
target_entry: Entry.Index,
target_off: u32 = 0,
};
const CrossUnitReloc = struct {
source_off: u32 = 0,
target_unit: Unit.Index,
target_entry: Entry.Index.Optional = .none,
target_off: u32 = 0,
};
const CrossSectionReloc = struct {
source_off: u32 = 0,
target_sec: Section.Index,
target_unit: Unit.Index,
target_entry: Entry.Index.Optional = .none,
target_off: u32 = 0,
};
const ExternalReloc = struct {
source_off: u32 = 0,
target_sym: u32,
target_off: u64 = 0,
};
pub const Loc = union(enum) {
@ -986,7 +1037,9 @@ pub const WipNav = struct {
entry: Entry.Index,
any_children: bool,
func: InternPool.Index,
func_sym_index: u32,
func_high_reloc: u32,
inlined_funcs_high_reloc: std.ArrayListUnmanaged(u32),
debug_info: std.ArrayListUnmanaged(u8),
debug_line: std.ArrayListUnmanaged(u8),
debug_loclists: std.ArrayListUnmanaged(u8),
@ -994,6 +1047,7 @@ pub const WipNav = struct {
pub fn deinit(wip_nav: *WipNav) void {
const gpa = wip_nav.dwarf.gpa;
if (wip_nav.func != .none) wip_nav.inlined_funcs_high_reloc.deinit(gpa);
wip_nav.debug_info.deinit(gpa);
wip_nav.debug_line.deinit(gpa);
wip_nav.debug_loclists.deinit(gpa);
@ -1004,10 +1058,10 @@ pub const WipNav = struct {
return wip_nav.debug_info.writer(wip_nav.dwarf.gpa);
}
pub const VarTag = enum { local_arg, local_var };
pub fn genVarDebugInfo(
pub const LocalTag = enum { local_arg, local_var };
pub fn genLocalDebugInfo(
wip_nav: *WipNav,
tag: VarTag,
tag: LocalTag,
name: []const u8,
ty: Type,
loc: Loc,
@ -1078,7 +1132,43 @@ pub const WipNav = struct {
try dlw.writeByte(DW.LNS.set_epilogue_begin);
}
pub fn enterInlineFunc(wip_nav: *WipNav, func: InternPool.Index, code_off: u64, line: u32, column: u32) UpdateError!void {
const dwarf = wip_nav.dwarf;
const zcu = wip_nav.pt.zcu;
const diw = wip_nav.debug_info.writer(dwarf.gpa);
try wip_nav.inlined_funcs_high_reloc.ensureUnusedCapacity(dwarf.gpa, 1);
try uleb128(diw, @intFromEnum(AbbrevCode.inlined_func));
try wip_nav.refNav(zcu.funcInfo(func).owner_nav);
try uleb128(diw, zcu.navSrcLine(zcu.funcInfo(wip_nav.func).owner_nav) + line + 1);
try uleb128(diw, column + 1);
const external_relocs = &dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs;
try external_relocs.ensureUnusedCapacity(dwarf.gpa, 2);
external_relocs.appendAssumeCapacity(.{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_sym = wip_nav.func_sym_index,
.target_off = code_off,
});
try diw.writeByteNTimes(0, @intFromEnum(dwarf.address_size));
wip_nav.inlined_funcs_high_reloc.appendAssumeCapacity(@intCast(external_relocs.items.len));
external_relocs.appendAssumeCapacity(.{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_sym = wip_nav.func_sym_index,
.target_off = undefined,
});
try diw.writeByteNTimes(0, @intFromEnum(dwarf.address_size));
try wip_nav.setInlineFunc(func);
}
pub fn leaveInlineFunc(wip_nav: *WipNav, func: InternPool.Index, code_off: u64) UpdateError!void {
const external_relocs = &wip_nav.dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs;
external_relocs.items[wip_nav.inlined_funcs_high_reloc.pop()].target_off = code_off;
try uleb128(wip_nav.debug_info.writer(wip_nav.dwarf.gpa), @intFromEnum(AbbrevCode.null));
try wip_nav.setInlineFunc(func);
}
pub fn setInlineFunc(wip_nav: *WipNav, func: InternPool.Index) UpdateError!void {
wip_nav.any_children = true;
const zcu = wip_nav.pt.zcu;
const dwarf = wip_nav.dwarf;
if (wip_nav.func == func) return;
@ -1096,8 +1186,7 @@ pub const WipNav = struct {
try dlw.writeByte(DW.LNS.extended_op);
try uleb128(dlw, 1 + dwarf.sectionOffsetBytes());
try dlw.writeByte(DW.LNE.ZIG_set_decl);
try dwarf.debug_line.section.getUnit(wip_nav.unit).cross_section_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry.toOptional(),
try dwarf.debug_line.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).cross_section_relocs.append(dwarf.gpa, .{
.source_off = @intCast(wip_nav.debug_line.items.len),
.target_sec = .debug_info,
.target_unit = new_unit,
@ -1133,9 +1222,9 @@ pub const WipNav = struct {
fn infoSectionOffset(wip_nav: *WipNav, sec: Section.Index, unit: Unit.Index, entry: Entry.Index, off: u32) UpdateError!void {
const dwarf = wip_nav.dwarf;
const gpa = dwarf.gpa;
const entry_ptr = dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry);
if (sec != .debug_info) {
try dwarf.debug_info.section.getUnit(wip_nav.unit).cross_section_relocs.append(gpa, .{
.source_entry = wip_nav.entry.toOptional(),
try entry_ptr.cross_section_relocs.append(gpa, .{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_sec = sec,
.target_unit = unit,
@ -1143,16 +1232,14 @@ pub const WipNav = struct {
.target_off = off,
});
} else if (unit != wip_nav.unit) {
try dwarf.debug_info.section.getUnit(wip_nav.unit).cross_unit_relocs.append(gpa, .{
.source_entry = wip_nav.entry.toOptional(),
try entry_ptr.cross_unit_relocs.append(gpa, .{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_unit = unit,
.target_entry = entry.toOptional(),
.target_off = off,
});
} else {
try dwarf.debug_info.section.getUnit(wip_nav.unit).cross_entry_relocs.append(gpa, .{
.source_entry = wip_nav.entry.toOptional(),
try entry_ptr.cross_entry_relocs.append(gpa, .{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_entry = entry,
.target_off = off,
@ -1167,8 +1254,7 @@ pub const WipNav = struct {
fn addrSym(wip_nav: *WipNav, sym_index: u32) UpdateError!void {
const dwarf = wip_nav.dwarf;
try dwarf.debug_info.section.getUnit(wip_nav.unit).external_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry,
try dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs.append(dwarf.gpa, .{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_sym = sym_index,
});
@ -1217,12 +1303,20 @@ pub const WipNav = struct {
try wip_nav.infoSectionOffset(.debug_info, unit, entry, 0);
}
fn refNav(wip_nav: *WipNav, nav_index: InternPool.Nav.Index) UpdateError!void {
const zcu = wip_nav.pt.zcu;
const ip = &zcu.intern_pool;
const unit = try wip_nav.dwarf.getUnit(zcu.fileByIndex(ip.getNav(nav_index).srcInst(ip).resolveFile(ip)).mod);
const nav_gop = try wip_nav.dwarf.navs.getOrPut(wip_nav.dwarf.gpa, nav_index);
if (!nav_gop.found_existing) nav_gop.value_ptr.* = try wip_nav.dwarf.addCommonEntry(unit);
try wip_nav.infoSectionOffset(.debug_info, unit, nav_gop.value_ptr.*, 0);
}
fn refForward(wip_nav: *WipNav) std.mem.Allocator.Error!u32 {
const dwarf = wip_nav.dwarf;
const cross_entry_relocs = &dwarf.debug_info.section.getUnit(wip_nav.unit).cross_entry_relocs;
const cross_entry_relocs = &dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).cross_entry_relocs;
const reloc_index: u32 = @intCast(cross_entry_relocs.items.len);
try cross_entry_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry.toOptional(),
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_entry = undefined,
.target_off = undefined,
@ -1232,7 +1326,7 @@ pub const WipNav = struct {
}
fn finishForward(wip_nav: *WipNav, reloc_index: u32) void {
const reloc = &wip_nav.dwarf.debug_info.section.getUnit(wip_nav.unit).cross_entry_relocs.items[reloc_index];
const reloc = &wip_nav.dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).cross_entry_relocs.items[reloc_index];
reloc.target_entry = wip_nav.entry;
reloc.target_off = @intCast(wip_nav.debug_info.items.len);
}
@ -1545,7 +1639,15 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
const unit = try dwarf.getUnit(file.mod);
const nav_gop = try dwarf.navs.getOrPut(dwarf.gpa, nav_index);
errdefer _ = dwarf.navs.pop();
if (!nav_gop.found_existing) nav_gop.value_ptr.* = try dwarf.addCommonEntry(unit);
if (nav_gop.found_existing) {
for ([_]*Section{
&dwarf.debug_aranges.section,
&dwarf.debug_info.section,
&dwarf.debug_line.section,
&dwarf.debug_loclists.section,
&dwarf.debug_rnglists.section,
}) |sec| sec.getUnit(unit).getEntry(nav_gop.value_ptr.*).clear();
} else nav_gop.value_ptr.* = try dwarf.addCommonEntry(unit);
const nav_val = zcu.navValue(nav_index);
var wip_nav: WipNav = .{
.dwarf = dwarf,
@ -1554,7 +1656,9 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
.entry = nav_gop.value_ptr.*,
.any_children = false,
.func = .none,
.func_sym_index = undefined,
.func_high_reloc = undefined,
.inlined_funcs_high_reloc = undefined,
.debug_info = .{},
.debug_line = .{},
.debug_loclists = .{},
@ -1608,16 +1712,7 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
try wip_nav.exprloc(.{ .addr = .{ .sym = sym_index } });
try uleb128(diw, nav.status.resolved.alignment.toByteUnits() orelse
ty.abiAlignment(pt).toByteUnits().?);
const func_unit = InternPool.AnalUnit.wrap(.{ .func = nav_val.toIntern() });
try diw.writeByte(@intFromBool(for (if (zcu.single_exports.get(func_unit)) |export_index|
zcu.all_exports.items[export_index..][0..1]
else if (zcu.multi_exports.get(func_unit)) |export_range|
zcu.all_exports.items[export_range.index..][0..export_range.len]
else
&.{}) |@"export"|
{
if (@"export".exported == .nav and @"export".exported.nav == nav_index) break true;
} else false));
try diw.writeByte(@intFromBool(false));
wip_nav.finishForward(ty_reloc_index);
try uleb128(diw, @intFromEnum(AbbrevCode.is_const));
try wip_nav.refType(ty);
@ -1668,16 +1763,7 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
try wip_nav.exprloc(if (variable.is_threadlocal) .{ .form_tls_address = &addr } else addr);
try uleb128(diw, nav.status.resolved.alignment.toByteUnits() orelse
ty.abiAlignment(pt).toByteUnits().?);
const func_unit = InternPool.AnalUnit.wrap(.{ .func = nav_val.toIntern() });
try diw.writeByte(@intFromBool(for (if (zcu.single_exports.get(func_unit)) |export_index|
zcu.all_exports.items[export_index..][0..1]
else if (zcu.multi_exports.get(func_unit)) |export_range|
zcu.all_exports.items[export_range.index..][0..export_range.len]
else
&.{}) |@"export"|
{
if (@"export".exported == .nav and @"export".exported.nav == nav_index) break true;
} else false));
try diw.writeByte(@intFromBool(false));
},
.func => |func| {
assert(file.zir_loaded);
@ -1712,6 +1798,8 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
const func_type = ip.indexToKey(func.ty).func_type;
wip_nav.func = nav_val.toIntern();
wip_nav.func_sym_index = sym_index;
wip_nav.inlined_funcs_high_reloc = .{};
const diw = wip_nav.debug_info.writer(dwarf.gpa);
try uleb128(diw, @intFromEnum(AbbrevCode.decl_func));
@ -1723,32 +1811,23 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
try wip_nav.strp(nav.name.toSlice(ip));
try wip_nav.strp(nav.fqn.toSlice(ip));
try wip_nav.refType(Type.fromInterned(func_type.return_type));
const external_relocs = &dwarf.debug_info.section.getUnit(unit).external_relocs;
try external_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry,
const external_relocs = &dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs;
try external_relocs.ensureUnusedCapacity(dwarf.gpa, 2);
external_relocs.appendAssumeCapacity(.{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_sym = sym_index,
});
try diw.writeByteNTimes(0, @intFromEnum(dwarf.address_size));
wip_nav.func_high_reloc = @intCast(external_relocs.items.len);
try external_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry,
external_relocs.appendAssumeCapacity(.{
.source_off = @intCast(wip_nav.debug_info.items.len),
.target_sym = sym_index,
.target_off = undefined,
});
try diw.writeByteNTimes(0, @intFromEnum(dwarf.address_size));
try uleb128(diw, nav.status.resolved.alignment.toByteUnits() orelse
target_info.defaultFunctionAlignment(file.mod.resolved_target.result).toByteUnits().?);
const func_unit = InternPool.AnalUnit.wrap(.{ .func = nav_val.toIntern() });
try diw.writeByte(@intFromBool(for (if (zcu.single_exports.get(func_unit)) |export_index|
zcu.all_exports.items[export_index..][0..1]
else if (zcu.multi_exports.get(func_unit)) |export_range|
zcu.all_exports.items[export_range.index..][0..export_range.len]
else
&.{}) |@"export"|
{
if (@"export".exported == .nav and @"export".exported.nav == nav_index) break true;
} else false));
try diw.writeByte(@intFromBool(false));
try diw.writeByte(@intFromBool(func_type.return_type == .noreturn_type));
const dlw = wip_nav.debug_line.writer(dwarf.gpa);
@ -1756,8 +1835,7 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
if (dwarf.incremental()) {
try uleb128(dlw, 1 + dwarf.sectionOffsetBytes());
try dlw.writeByte(DW.LNE.ZIG_set_decl);
try dwarf.debug_line.section.getUnit(wip_nav.unit).cross_section_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry.toOptional(),
try dwarf.debug_line.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).cross_section_relocs.append(dwarf.gpa, .{
.source_off = @intCast(wip_nav.debug_line.items.len),
.target_sec = .debug_info,
.target_unit = wip_nav.unit,
@ -1772,8 +1850,7 @@ pub fn initWipNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool.Nav.In
} else {
try uleb128(dlw, 1 + @intFromEnum(dwarf.address_size));
try dlw.writeByte(DW.LNE.set_address);
try dwarf.debug_line.section.getUnit(wip_nav.unit).external_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry,
try dwarf.debug_line.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs.append(dwarf.gpa, .{
.source_off = @intCast(wip_nav.debug_line.items.len),
.target_sym = sym_index,
});
@ -1806,7 +1883,8 @@ pub fn finishWipNav(
log.debug("finishWipNav({})", .{nav.fqn.fmt(ip)});
if (wip_nav.func != .none) {
dwarf.debug_info.section.getUnit(wip_nav.unit).external_relocs.items[wip_nav.func_high_reloc].target_off = sym.size;
const external_relocs = &dwarf.debug_info.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs;
external_relocs.items[wip_nav.func_high_reloc].target_off = sym.size;
if (wip_nav.any_children) {
const diw = wip_nav.debug_info.writer(dwarf.gpa);
try uleb128(diw, @intFromEnum(AbbrevCode.null));
@ -1817,8 +1895,7 @@ pub fn finishWipNav(
);
var aranges_entry = [1]u8{0} ** (8 + 8);
try dwarf.debug_aranges.section.getUnit(wip_nav.unit).external_relocs.append(dwarf.gpa, .{
.source_entry = wip_nav.entry,
try dwarf.debug_aranges.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs.append(dwarf.gpa, .{
.target_sym = sym.index,
});
dwarf.writeInt(aranges_entry[0..@intFromEnum(dwarf.address_size)], 0);
@ -1832,14 +1909,12 @@ pub fn finishWipNav(
aranges_entry[0 .. @intFromEnum(dwarf.address_size) * 2],
);
try dwarf.debug_rnglists.section.getUnit(wip_nav.unit).external_relocs.appendSlice(dwarf.gpa, &.{
try dwarf.debug_rnglists.section.getUnit(wip_nav.unit).getEntry(wip_nav.entry).external_relocs.appendSlice(dwarf.gpa, &.{
.{
.source_entry = wip_nav.entry,
.source_off = 1,
.target_sym = sym.index,
},
.{
.source_entry = wip_nav.entry,
.source_off = 1 + @intFromEnum(dwarf.address_size),
.target_sym = sym.index,
.target_off = sym.size,
@ -1891,7 +1966,9 @@ pub fn updateComptimeNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool
.entry = undefined,
.any_children = false,
.func = .none,
.func_sym_index = undefined,
.func_high_reloc = undefined,
.inlined_funcs_high_reloc = undefined,
.debug_info = .{},
.debug_line = .{},
.debug_loclists = .{},
@ -1902,6 +1979,62 @@ pub fn updateComptimeNav(dwarf: *Dwarf, pt: Zcu.PerThread, nav_index: InternPool
const nav_gop = try dwarf.navs.getOrPut(dwarf.gpa, nav_index);
errdefer _ = dwarf.navs.pop();
switch (ip.indexToKey(nav_val.toIntern())) {
.func => |func| {
if (nav_gop.found_existing) {
const unit_ptr = dwarf.debug_info.section.getUnit(unit);
const entry_ptr = unit_ptr.getEntry(nav_gop.value_ptr.*);
if (entry_ptr.len >= AbbrevCode.decl_bytes) {
var abbrev_code_buf: [AbbrevCode.decl_bytes]u8 = undefined;
if (try dwarf.getFile().?.preadAll(
&abbrev_code_buf,
dwarf.debug_info.section.off + unit_ptr.off + unit_ptr.header_len + entry_ptr.off,
) != abbrev_code_buf.len) return error.InputOutput;
var abbrev_code_fbs = std.io.fixedBufferStream(&abbrev_code_buf);
const abbrev_code: AbbrevCode = @enumFromInt(
try std.leb.readUleb128(@typeInfo(AbbrevCode).Enum.tag_type, abbrev_code_fbs.reader()),
);
switch (abbrev_code) {
else => unreachable,
.decl_func, .decl_func_empty => return,
.decl_func_generic, .decl_func_generic_empty => {},
}
}
entry_ptr.clear();
} else nav_gop.value_ptr.* = try dwarf.addCommonEntry(unit);
wip_nav.entry = nav_gop.value_ptr.*;
const parent_type, const accessibility: u8 = if (nav.analysis_owner.unwrap()) |cau| parent: {
const parent_namespace_ptr = ip.namespacePtr(ip.getCau(cau).namespace);
break :parent .{
parent_namespace_ptr.owner_type,
if (parent_namespace_ptr.pub_decls.containsContext(nav_index, .{ .zcu = zcu }))
DW.ACCESS.public
else if (parent_namespace_ptr.priv_decls.containsContext(nav_index, .{ .zcu = zcu }))
DW.ACCESS.private
else
unreachable,
};
} else .{ zcu.fileRootType(inst_info.file), DW.ACCESS.private };
const func_type = ip.indexToKey(func.ty).func_type;
const diw = wip_nav.debug_info.writer(dwarf.gpa);
try uleb128(diw, @intFromEnum(@as(AbbrevCode, if (func_type.param_types.len > 0 or func_type.is_var_args) .decl_func_generic else .decl_func_generic_empty)));
try wip_nav.refType(Type.fromInterned(parent_type));
assert(wip_nav.debug_info.items.len == DebugInfo.declEntryLineOff(dwarf));
try diw.writeInt(u32, @intCast(loc.line + 1), dwarf.endian);
try uleb128(diw, loc.column + 1);
try diw.writeByte(accessibility);
try wip_nav.strp(nav.name.toSlice(ip));
try wip_nav.refType(Type.fromInterned(func_type.return_type));
if (func_type.param_types.len > 0 or func_type.is_var_args) {
for (0..func_type.param_types.len) |param_index| {
try uleb128(diw, @intFromEnum(AbbrevCode.func_type_param));
try wip_nav.refType(Type.fromInterned(func_type.param_types.get(ip)[param_index]));
}
if (func_type.is_var_args) try uleb128(diw, @intFromEnum(AbbrevCode.is_var_args));
try uleb128(diw, @intFromEnum(AbbrevCode.null));
}
},
.struct_type => done: {
const loaded_struct = ip.loadStructType(nav_val.toIntern());
@ -2304,7 +2437,9 @@ fn updateType(
.entry = dwarf.types.get(type_index).?,
.any_children = false,
.func = .none,
.func_sym_index = undefined,
.func_high_reloc = undefined,
.inlined_funcs_high_reloc = undefined,
.debug_info = .{},
.debug_line = .{},
.debug_loclists = .{},
@ -2467,13 +2602,25 @@ fn updateType(
.error_union_type => |error_union_type| {
const error_union_error_set_type = Type.fromInterned(error_union_type.error_set_type);
const error_union_payload_type = Type.fromInterned(error_union_type.payload_type);
const error_union_error_set_offset = codegen.errUnionErrorOffset(error_union_payload_type, pt);
const error_union_payload_offset = codegen.errUnionPayloadOffset(error_union_payload_type, pt);
const error_union_error_set_offset, const error_union_payload_offset = switch (error_union_type.payload_type) {
.generic_poison_type => .{ 0, 0 },
else => .{
codegen.errUnionErrorOffset(error_union_payload_type, pt),
codegen.errUnionPayloadOffset(error_union_payload_type, pt),
},
};
try uleb128(diw, @intFromEnum(AbbrevCode.union_type));
try wip_nav.strp(name);
try uleb128(diw, ty.abiSize(pt));
try uleb128(diw, ty.abiAlignment(pt).toByteUnits().?);
if (error_union_type.error_set_type != .generic_poison_type and
error_union_type.payload_type != .generic_poison_type)
{
try uleb128(diw, ty.abiSize(pt));
try uleb128(diw, ty.abiAlignment(pt).toByteUnits().?);
} else {
try uleb128(diw, 0);
try uleb128(diw, 1);
}
{
try uleb128(diw, @intFromEnum(AbbrevCode.tagged_union));
try wip_nav.infoSectionOffset(
@ -2655,10 +2802,16 @@ fn updateType(
}
if (error_set_type.names.len > 0) try uleb128(diw, @intFromEnum(AbbrevCode.null));
},
.inferred_error_set_type => |func| {
try uleb128(diw, @intFromEnum(AbbrevCode.inferred_error_set_type));
try wip_nav.strp(name);
try wip_nav.refType(Type.fromInterned(ip.funcIesResolvedUnordered(func)));
.inferred_error_set_type => |func| switch (ip.funcIesResolvedUnordered(func)) {
.none => {
try uleb128(diw, @intFromEnum(AbbrevCode.void_type));
try wip_nav.strp(name);
},
else => |ies| {
try uleb128(diw, @intFromEnum(AbbrevCode.inferred_error_set_type));
try wip_nav.strp(name);
try wip_nav.refType(Type.fromInterned(ies));
},
},
// values, not types
@ -2705,7 +2858,9 @@ pub fn updateContainerType(dwarf: *Dwarf, pt: Zcu.PerThread, type_index: InternP
.entry = type_gop.value_ptr.*,
.any_children = false,
.func = .none,
.func_sym_index = undefined,
.func_high_reloc = undefined,
.inlined_funcs_high_reloc = undefined,
.debug_info = .{},
.debug_line = .{},
.debug_loclists = .{},
@ -2766,7 +2921,9 @@ pub fn updateContainerType(dwarf: *Dwarf, pt: Zcu.PerThread, type_index: InternP
.entry = type_gop.value_ptr.*,
.any_children = false,
.func = .none,
.func_sym_index = undefined,
.func_high_reloc = undefined,
.inlined_funcs_high_reloc = undefined,
.debug_info = .{},
.debug_line = .{},
.debug_loclists = .{},
@ -2940,7 +3097,9 @@ pub fn flushModule(dwarf: *Dwarf, pt: Zcu.PerThread) FlushError!void {
.entry = entry,
.any_children = false,
.func = .none,
.func_sym_index = undefined,
.func_high_reloc = undefined,
.inlined_funcs_high_reloc = undefined,
.debug_info = .{},
.debug_line = .{},
.debug_loclists = .{},
@ -2998,7 +3157,8 @@ pub fn flushModule(dwarf: *Dwarf, pt: Zcu.PerThread) FlushError!void {
if (dwarf.debug_aranges.section.dirty) {
for (dwarf.debug_aranges.section.units.items, 0..) |*unit_ptr, unit_index| {
const unit: Unit.Index = @enumFromInt(unit_index);
try unit_ptr.cross_section_relocs.ensureUnusedCapacity(dwarf.gpa, 1);
unit_ptr.clear();
try unit_ptr.cross_section_relocs.ensureTotalCapacity(dwarf.gpa, 1);
header.clearRetainingCapacity();
try header.ensureTotalCapacity(unit_ptr.header_len);
const unit_len = (if (unit_ptr.next.unwrap()) |next_unit|
@ -3029,8 +3189,9 @@ pub fn flushModule(dwarf: *Dwarf, pt: Zcu.PerThread) FlushError!void {
if (dwarf.debug_info.section.dirty) {
for (dwarf.mods.keys(), dwarf.mods.values(), dwarf.debug_info.section.units.items, 0..) |mod, mod_info, *unit_ptr, unit_index| {
const unit: Unit.Index = @enumFromInt(unit_index);
try unit_ptr.cross_unit_relocs.ensureUnusedCapacity(dwarf.gpa, 1);
try unit_ptr.cross_section_relocs.ensureUnusedCapacity(dwarf.gpa, 7);
unit_ptr.clear();
try unit_ptr.cross_unit_relocs.ensureTotalCapacity(dwarf.gpa, 1);
try unit_ptr.cross_section_relocs.ensureTotalCapacity(dwarf.gpa, 7);
header.clearRetainingCapacity();
try header.ensureTotalCapacity(unit_ptr.header_len);
const unit_len = (if (unit_ptr.next.unwrap()) |next_unit|
@ -3121,7 +3282,8 @@ pub fn flushModule(dwarf: *Dwarf, pt: Zcu.PerThread) FlushError!void {
for (dwarf.mods.values(), dwarf.debug_line.section.units.items) |mod_info, *unit|
try unit.resizeHeader(&dwarf.debug_line.section, dwarf, DebugLine.headerBytes(dwarf, @intCast(mod_info.dirs.count()), @intCast(mod_info.files.count())));
for (dwarf.mods.values(), dwarf.debug_line.section.units.items) |mod_info, *unit| {
try unit.cross_section_relocs.ensureUnusedCapacity(dwarf.gpa, 2 * (1 + mod_info.files.count()));
unit.clear();
try unit.cross_section_relocs.ensureTotalCapacity(dwarf.gpa, 2 * (1 + mod_info.files.count()));
header.clearRetainingCapacity();
try header.ensureTotalCapacity(unit.header_len);
const unit_len = (if (unit.next.unwrap()) |next_unit|
@ -3310,6 +3472,8 @@ const AbbrevCode = enum(u8) {
decl_var,
decl_func,
decl_func_empty,
decl_func_generic,
decl_func_generic_empty,
// the rest are unrestricted
compile_unit,
module,
@ -3344,10 +3508,11 @@ const AbbrevCode = enum(u8) {
struct_type,
packed_struct_type,
union_type,
inlined_func,
local_arg,
local_var,
const decl_bytes = uleb128Bytes(@intFromEnum(AbbrevCode.decl_func_empty));
const decl_bytes = uleb128Bytes(@intFromEnum(AbbrevCode.decl_func_generic_empty));
const Attr = struct {
DeclValEnum(DW.AT),
@ -3451,6 +3616,19 @@ const AbbrevCode = enum(u8) {
.{ .noreturn, .flag },
},
},
.decl_func_generic = .{
.tag = .subprogram,
.children = true,
.attrs = decl_abbrev_common_attrs ++ .{
.{ .type, .ref_addr },
},
},
.decl_func_generic_empty = .{
.tag = .subprogram,
.attrs = decl_abbrev_common_attrs ++ .{
.{ .type, .ref_addr },
},
},
.compile_unit = .{
.tag = .compile_unit,
.children = true,
@ -3706,6 +3884,17 @@ const AbbrevCode = enum(u8) {
.{ .alignment, .udata },
},
},
.inlined_func = .{
.tag = .inlined_subroutine,
.children = true,
.attrs = &.{
.{ .abstract_origin, .ref_addr },
.{ .call_line, .udata },
.{ .call_column, .udata },
.{ .low_pc, .addr },
.{ .high_pc, .addr },
},
},
.local_arg = .{
.tag = .formal_parameter,
.attrs = &.{

12
src/link/Elf/ZigObject.zig
View File

@ -1122,9 +1122,9 @@ pub fn updateNav(
log.debug("updateNav {}({d})", .{ nav.fqn.fmt(ip), nav_index });
const nav_val = zcu.navValue(nav_index);
const nav_init = switch (ip.indexToKey(nav_val.toIntern())) {
.variable => |variable| Value.fromInterned(variable.init),
const nav_init = switch (ip.indexToKey(nav.status.resolved.val)) {
.func => .none,
.variable => |variable| variable.init,
.@"extern" => |@"extern"| {
if (ip.isFunctionType(@"extern".ty)) return;
const sym_index = try self.getGlobalSymbol(
@ -1135,10 +1135,10 @@ pub fn updateNav(
self.symbol(sym_index).flags.is_extern_ptr = true;
return;
},
else => nav_val,
else => nav.status.resolved.val,
};
if (nav_init.typeOf(zcu).isFnOrHasRuntimeBits(pt)) {
if (nav_init != .none and Value.fromInterned(nav_init).typeOf(zcu).hasRuntimeBits(pt)) {
const sym_index = try self.getOrCreateMetadataForNav(elf_file, nav_index);
self.symbol(sym_index).atom(elf_file).?.freeRelocs(elf_file);
@ -1153,7 +1153,7 @@ pub fn updateNav(
&elf_file.base,
pt,
zcu.navSrcLoc(nav_index),
nav_init,
Value.fromInterned(nav_init),
&code_buffer,
if (debug_wip_nav) |*wip_nav| .{ .dwarf = wip_nav } else .none,
.{ .parent_atom_index = sym_index },

13
src/link/MachO/ZigObject.zig
View File

@ -869,10 +869,11 @@ pub fn updateNav(
const zcu = pt.zcu;
const ip = &zcu.intern_pool;
const nav = ip.getNav(nav_index);
const nav_val = zcu.navValue(nav_index);
const nav_init = switch (ip.indexToKey(nav_val.toIntern())) {
.variable => |variable| Value.fromInterned(variable.init),
const nav_init = switch (ip.indexToKey(nav.status.resolved.val)) {
.func => .none,
.variable => |variable| variable.init,
.@"extern" => |@"extern"| {
if (ip.isFunctionType(@"extern".ty)) return;
// Extern variable gets a __got entry only
@ -883,10 +884,10 @@ pub fn updateNav(
sym.flags.is_extern_ptr = true;
return;
},
else => nav_val,
else => nav.status.resolved.val,
};
if (nav_init.typeOf(zcu).isFnOrHasRuntimeBits(pt)) {
if (nav_init != .none and Value.fromInterned(nav_init).typeOf(zcu).hasRuntimeBits(pt)) {
const sym_index = try self.getOrCreateMetadataForNav(macho_file, nav_index);
self.symbols.items[sym_index].getAtom(macho_file).?.freeRelocs(macho_file);
@ -900,7 +901,7 @@ pub fn updateNav(
&macho_file.base,
pt,
zcu.navSrcLoc(nav_index),
nav_init,
Value.fromInterned(nav_init),
&code_buffer,
if (debug_wip_nav) |*wip_nav| .{ .dwarf = wip_nav } else .none,
.{ .parent_atom_index = sym_index },

3
src/link/Plan9.zig
View File

@ -448,6 +448,7 @@ pub fn updateNav(self: *Plan9, pt: Zcu.PerThread, nav_index: InternPool.Nav.Inde
const nav = ip.getNav(nav_index);
const nav_val = zcu.navValue(nav_index);
const nav_init = switch (ip.indexToKey(nav_val.toIntern())) {
.func => return,
.variable => |variable| Value.fromInterned(variable.init),
.@"extern" => {
log.debug("found extern decl: {}", .{nav.name.fmt(ip)});
@ -456,7 +457,7 @@ pub fn updateNav(self: *Plan9, pt: Zcu.PerThread, nav_index: InternPool.Nav.Inde
else => nav_val,
};
if (nav_init.typeOf(zcu).isFnOrHasRuntimeBits(pt)) {
if (nav_init.typeOf(zcu).hasRuntimeBits(pt)) {
const atom_idx = try self.seeNav(pt, nav_index);
var code_buffer = std.ArrayList(u8).init(gpa);

2
src/link/Wasm/ZigObject.zig
View File

@ -259,7 +259,7 @@ pub fn updateNav(
else => .{ false, .none, nav_val },
};
if (nav_init.typeOf(zcu).isFnOrHasRuntimeBits(pt)) {
if (nav_init.typeOf(zcu).hasRuntimeBits(pt)) {
const gpa = wasm_file.base.comp.gpa;
const atom_index = try zig_object.getOrCreateAtomForNav(wasm_file, pt, nav_index);
const atom = wasm_file.getAtomPtr(atom_index);

10
src/print_air.zig
View File

@ -283,6 +283,7 @@ const Writer = struct {
.dbg_var_ptr,
.dbg_var_val,
.dbg_arg_inline,
=> try w.writeDbgVar(s, inst),
.struct_field_ptr => try w.writeStructField(s, inst),
@ -358,10 +359,7 @@ const Writer = struct {
try w.writeType(s, arg.ty.toType());
switch (arg.name) {
.none => {},
_ => {
const name = w.air.nullTerminatedString(@intFromEnum(arg.name));
try s.print(", \"{}\"", .{std.zig.fmtEscapes(name)});
},
_ => try s.print(", \"{}\"", .{std.zig.fmtEscapes(arg.name.toSlice(w.air))}),
}
}
@ -686,8 +684,8 @@ const Writer = struct {
fn writeDbgVar(w: *Writer, s: anytype, inst: Air.Inst.Index) @TypeOf(s).Error!void {
const pl_op = w.air.instructions.items(.data)[@intFromEnum(inst)].pl_op;
try w.writeOperand(s, inst, 0, pl_op.operand);
const name = w.air.nullTerminatedString(pl_op.payload);
try s.print(", \"{}\"", .{std.zig.fmtEscapes(name)});
const name: Air.NullTerminatedString = @enumFromInt(pl_op.payload);
try s.print(", \"{}\"", .{std.zig.fmtEscapes(name.toSlice(w.air))});
}
fn writeCall(w: *Writer, s: anytype, inst: Air.Inst.Index) @TypeOf(s).Error!void {

86
test/src/Debugger.zig
View File

@ -587,7 +587,7 @@ pub fn addTestsForTarget(db: *Debugger, target: Target) void {
},
);
db.addLldbTest(
"cross_module_call",
"inline_call",
target,
&.{
.{
@ -595,8 +595,18 @@ pub fn addTestsForTarget(db: *Debugger, target: Target) void {
.source =
\\const module = @import("module");
\\pub fn main() void {
\\ module.foo(123);
\\ module.bar(456);
\\ fa(12);
\\ fb(34);
\\ module.fc(56);
\\ module.fd(78);
\\}
\\fn fa(pa: u32) void {
\\ const la = ~pa;
\\ _ = la;
\\}
\\inline fn fb(pb: u32) void {
\\ const lb = ~pb;
\\ _ = lb;
\\}
\\
,
@ -605,34 +615,84 @@ pub fn addTestsForTarget(db: *Debugger, target: Target) void {
.import = "module",
.path = "module.zig",
.source =
\\pub fn foo(x: u32) void {
\\ _ = x;
\\pub fn fc(pc: u32) void {
\\ const lc = ~pc;
\\ _ = lc;
\\}
\\pub inline fn bar(y: u32) void {
\\ _ = y;
\\pub inline fn fd(pd: u32) void {
\\ const ld = ~pd;
\\ _ = ld;
\\}
\\
,
},
},
\\breakpoint set --file module.zig --source-pattern-regexp '_ = x;'
\\settings set frame-format 'frame #${frame.index}:{ ${module.file.basename}{\`${function.name-with-args}{${frame.no-debug}${function.pc-offset}}}}{ at ${line.file.basename}:${line.number}{:${line.column}}}{${function.is-optimized} [opt]}{${frame.is-artificial} [artificial]}\n'
\\
\\breakpoint set --file main.zig --source-pattern-regexp '_ = la;'
\\process launch
\\source info
\\frame variable pa la
\\thread backtrace --count 2
\\breakpoint delete --force 1
\\
\\breakpoint set --file module.zig --line 5
\\breakpoint set --file main.zig --source-pattern-regexp '_ = lb;'
\\process continue
\\source info
\\frame variable pb lb
\\thread backtrace --count 2
\\breakpoint delete --force 2
\\
\\breakpoint set --file module.zig --source-pattern-regexp '_ = lc;'
\\process continue
\\frame variable pc lc
\\thread backtrace --count 2
\\breakpoint delete --force 3
\\
\\breakpoint set --file module.zig --line 7
\\process continue
\\frame variable pd ld
\\thread backtrace --count 2
\\breakpoint delete --force 4
,
&.{
\\/module.zig:2:5
\\(lldb) frame variable pa la
\\(u32) pa = 12
\\(u32) la = 4294967283
\\(lldb) thread backtrace --count 2
\\* thread #1, name = 'inline_call', stop reason = breakpoint 1.1
\\ * frame #0: inline_call`main.fa(pa=12) at main.zig:10:5
\\ frame #1: inline_call`main.main at main.zig:3:7
\\(lldb) breakpoint delete --force 1
\\1 breakpoints deleted; 0 breakpoint locations disabled.
,
\\/module.zig:5:5
\\(lldb) frame variable pb lb
\\(u32) pb = 34
\\(u32) lb = 4294967261
\\(lldb) thread backtrace --count 2
\\* thread #1, name = 'inline_call', stop reason = breakpoint 2.1
\\ * frame #0: inline_call`main.main [inlined] fb(pb=34) at main.zig:14:5
\\ frame #1: inline_call`main.main at main.zig:4:7
\\(lldb) breakpoint delete --force 2
\\1 breakpoints deleted; 0 breakpoint locations disabled.
,
\\(lldb) frame variable pc lc
\\(u32) pc = 56
\\(u32) lc = 4294967239
\\(lldb) thread backtrace --count 2
\\* thread #1, name = 'inline_call', stop reason = breakpoint 3.1
\\ * frame #0: inline_call`module.fc(pc=56) at module.zig:3:5
\\ frame #1: inline_call`main.main at main.zig:5:14
\\(lldb) breakpoint delete --force 3
\\1 breakpoints deleted; 0 breakpoint locations disabled.
,
\\(lldb) frame variable pd ld
\\(u32) pd = 78
\\(u32) ld = 4294967217
\\(lldb) thread backtrace --count 2
\\* thread #1, name = 'inline_call', stop reason = breakpoint 4.1
\\ * frame #0: inline_call`main.main [inlined] fd(pd=78) at module.zig:7:5
\\ frame #1: inline_call`main.main at main.zig:6:14
\\(lldb) breakpoint delete --force 4
\\1 breakpoints deleted; 0 breakpoint locations disabled.
},
);
}