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stage2: sparcv9: Add debug info generation for args

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Koakuma 2022-04-21 20:17:41 +07:00 committed by Jakub Konka
parent e76d52c74d
commit c73eb00727
1 changed files with 56 additions and 0 deletions
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56
src/arch/sparcv9/CodeGen.zig
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@ -780,6 +780,8 @@ fn airArg(self: *Self, inst: Air.Inst.Index) !void {
// TODO Copy registers to the stack
const mcv = result;
try self.genArgDbgInfo(inst, mcv, @intCast(u32, arg_index));
if (self.liveness.isUnused(inst))
return self.finishAirBookkeeping();
@ -1038,6 +1040,26 @@ fn airSwitch(self: *Self, inst: Air.Inst.Index) !void {
// Common helper functions
/// Adds a Type to the .debug_info at the current position. The bytes will be populated later,
/// after codegen for this symbol is done.
fn addDbgInfoTypeReloc(self: *Self, ty: Type) !void {
switch (self.debug_output) {
.dwarf => |dw| {
assert(ty.hasRuntimeBits());
const dbg_info = &dw.dbg_info;
const index = dbg_info.items.len;
try dbg_info.resize(index + 4); // DW.AT.type, DW.FORM.ref4
const mod = self.bin_file.options.module.?;
const atom = switch (self.bin_file.tag) {
.elf => &mod.declPtr(self.mod_fn.owner_decl).link.elf.dbg_info_atom,
else => unreachable,
};
try dw.addTypeReloc(atom, ty, @intCast(u32, index), null);
},
else => {},
}
}
fn addInst(self: *Self, inst: Mir.Inst) error{OutOfMemory}!Mir.Inst.Index {
const gpa = self.gpa;
try self.mir_instructions.ensureUnusedCapacity(gpa, 1);
@ -1166,6 +1188,40 @@ fn finishAir(self: *Self, inst: Air.Inst.Index, result: MCValue, operands: [Live
self.finishAirBookkeeping();
}
fn genArgDbgInfo(self: *Self, inst: Air.Inst.Index, mcv: MCValue, arg_index: u32) !void {
const ty = self.air.instructions.items(.data)[inst].ty;
const name = self.mod_fn.getParamName(arg_index);
const name_with_null = name.ptr[0 .. name.len + 1];
switch (mcv) {
.register => |reg| {
switch (self.debug_output) {
.dwarf => |dw| {
const dbg_info = &dw.dbg_info;
try dbg_info.ensureUnusedCapacity(3);
dbg_info.appendAssumeCapacity(@enumToInt(link.File.Dwarf.AbbrevKind.parameter));
dbg_info.appendSliceAssumeCapacity(&[2]u8{ // DW.AT.location, DW.FORM.exprloc
1, // ULEB128 dwarf expression length
reg.dwarfLocOp(),
});
try dbg_info.ensureUnusedCapacity(5 + name_with_null.len);
try self.addDbgInfoTypeReloc(ty); // DW.AT.type, DW.FORM.ref4
dbg_info.appendSliceAssumeCapacity(name_with_null); // DW.AT.name, DW.FORM.string
},
else => {},
}
},
.stack_offset => |offset| {
_ = offset;
switch (self.debug_output) {
.dwarf => {},
else => {},
}
},
else => {},
}
}
fn genLoad(self: *Self, value_reg: Register, addr_reg: Register, comptime off_type: type, off: off_type, abi_size: u64) !void {
assert(off_type == Register or off_type == i13);