mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2026-02-13 04:48:20 +00:00
Code Issues Packages Projects Releases Wiki Activity

elf: add debug info for non-ptr optionals

Browse Source
This commit is contained in:
Jakub Konka 2022-03-05 20:17:58 +01:00
parent 9a027d9ee3
commit 1252bdd4d6
2 changed files with 56 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/codegen.zig
View File

@ -639,7 +639,6 @@ pub fn generateSymbol(
return Result{ .appended = {} };
},
.Optional => {
// TODO generate debug info for optionals
var opt_buf: Type.Payload.ElemType = undefined;
const payload_type = typed_value.ty.optionalChild(&opt_buf);
const is_pl = !typed_value.val.isNull();

79
src/link/Elf.zig
View File

@ -983,10 +983,9 @@ pub const abbrev_subprogram_retvoid = 3;
pub const abbrev_base_type = 4;
pub const abbrev_ptr_type = 5;
pub const abbrev_struct_type = 6;
pub const abbrev_anon_struct_type = 7;
pub const abbrev_struct_member = 8;
pub const abbrev_pad1 = 9;
pub const abbrev_parameter = 10;
pub const abbrev_struct_member = 7;
pub const abbrev_pad1 = 8;
pub const abbrev_parameter = 9;
pub fn flush(self: *Elf, comp: *Compilation) !void {
if (self.base.options.emit == null) {
@ -1127,13 +1126,6 @@ pub fn flushModule(self: *Elf, comp: *Compilation) !void {
DW.FORM.string,
0,
0, // table sentinel
abbrev_anon_struct_type,
DW.TAG.structure_type,
DW.CHILDREN.yes, // header
DW.AT.byte_size,
DW.FORM.sdata,
0,
0, // table sentinel
abbrev_struct_member,
DW.TAG.member,
DW.CHILDREN.no, // header
@ -3186,6 +3178,7 @@ fn addDbgInfoType(
dbg_info_buffer: *std.ArrayList(u8),
dbg_info_type_relocs: *File.DbgInfoTypeRelocsTable,
) error{OutOfMemory}!void {
const target = self.base.options.target;
var relocs = std.ArrayList(struct { ty: Type, reloc: u32 }).init(arena);
switch (ty.zigTypeTag()) {
@ -3202,7 +3195,7 @@ fn addDbgInfoType(
});
},
.Int => {
const info = ty.intInfo(self.base.options.target);
const info = ty.intInfo(target);
try dbg_info_buffer.ensureUnusedCapacity(12);
dbg_info_buffer.appendAssumeCapacity(abbrev_base_type);
// DW.AT.encoding, DW.FORM.data1
@ -3211,7 +3204,7 @@ fn addDbgInfoType(
.unsigned => DW.ATE.unsigned,
});
// DW.AT.byte_size, DW.FORM.data1
dbg_info_buffer.appendAssumeCapacity(@intCast(u8, ty.abiSize(self.base.options.target)));
dbg_info_buffer.appendAssumeCapacity(@intCast(u8, ty.abiSize(target)));
// DW.AT.name, DW.FORM.string
try dbg_info_buffer.writer().print("{}\x00", .{ty});
},
@ -3222,23 +3215,61 @@ fn addDbgInfoType(
// DW.AT.encoding, DW.FORM.data1
dbg_info_buffer.appendAssumeCapacity(DW.ATE.address);
// DW.AT.byte_size, DW.FORM.data1
dbg_info_buffer.appendAssumeCapacity(@intCast(u8, ty.abiSize(self.base.options.target)));
dbg_info_buffer.appendAssumeCapacity(@intCast(u8, ty.abiSize(target)));
// DW.AT.name, DW.FORM.string
try dbg_info_buffer.writer().print("{}\x00", .{ty});
} else {
log.debug("TODO implement .debug_info for type '{}'", .{ty});
try dbg_info_buffer.append(abbrev_pad1);
// Non-pointer optionals are structs: struct { .maybe = *, .val = * }
var buf = try arena.create(Type.Payload.ElemType);
const payload_ty = ty.optionalChild(buf);
// DW.AT.structure_type
try dbg_info_buffer.append(abbrev_struct_type);
// DW.AT.byte_size, DW.FORM.sdata
const abi_size = ty.abiSize(target);
try leb128.writeULEB128(dbg_info_buffer.writer(), abi_size);
// DW.AT.name, DW.FORM.string
try dbg_info_buffer.writer().print("{}\x00", .{ty});
// DW.AT.member
try dbg_info_buffer.ensureUnusedCapacity(7);
dbg_info_buffer.appendAssumeCapacity(abbrev_struct_member);
// DW.AT.name, DW.FORM.string
dbg_info_buffer.appendSliceAssumeCapacity("maybe");
dbg_info_buffer.appendAssumeCapacity(0);
// DW.AT.type, DW.FORM.ref4
var index = dbg_info_buffer.items.len;
try dbg_info_buffer.resize(index + 4);
try relocs.append(.{ .ty = Type.bool, .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
try dbg_info_buffer.ensureUnusedCapacity(6);
dbg_info_buffer.appendAssumeCapacity(0);
// DW.AT.member
dbg_info_buffer.appendAssumeCapacity(abbrev_struct_member);
// DW.AT.name, DW.FORM.string
dbg_info_buffer.appendSliceAssumeCapacity("val");
dbg_info_buffer.appendAssumeCapacity(0);
// DW.AT.type, DW.FORM.ref4
index = dbg_info_buffer.items.len;
try dbg_info_buffer.resize(index + 4);
try relocs.append(.{ .ty = payload_ty, .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
const offset = abi_size - payload_ty.abiSize(target);
try leb128.writeULEB128(dbg_info_buffer.writer(), offset);
// DW.AT.structure_type delimit children
try dbg_info_buffer.append(0);
}
},
.Pointer => {
if (ty.isSlice()) {
// Slices are anonymous structs: struct { .ptr = *, .len = N }
try dbg_info_buffer.ensureUnusedCapacity(23);
// Slices are structs: struct { .ptr = *, .len = N }
// DW.AT.structure_type
dbg_info_buffer.appendAssumeCapacity(abbrev_anon_struct_type);
try dbg_info_buffer.ensureUnusedCapacity(2);
dbg_info_buffer.appendAssumeCapacity(abbrev_struct_type);
// DW.AT.byte_size, DW.FORM.sdata
dbg_info_buffer.appendAssumeCapacity(16);
dbg_info_buffer.appendAssumeCapacity(@sizeOf(usize) * 2);
// DW.AT.name, DW.FORM.string
try dbg_info_buffer.writer().print("{}\x00", .{ty});
// DW.AT.member
try dbg_info_buffer.ensureUnusedCapacity(5);
dbg_info_buffer.appendAssumeCapacity(abbrev_struct_member);
// DW.AT.name, DW.FORM.string
dbg_info_buffer.appendSliceAssumeCapacity("ptr");
@ -3250,6 +3281,7 @@ fn addDbgInfoType(
const ptr_ty = ty.slicePtrFieldType(buf);
try relocs.append(.{ .ty = ptr_ty, .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
try dbg_info_buffer.ensureUnusedCapacity(6);
dbg_info_buffer.appendAssumeCapacity(0);
// DW.AT.member
dbg_info_buffer.appendAssumeCapacity(abbrev_struct_member);
@ -3261,7 +3293,8 @@ fn addDbgInfoType(
try dbg_info_buffer.resize(index + 4);
try relocs.append(.{ .ty = Type.initTag(.usize), .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
dbg_info_buffer.appendAssumeCapacity(8);
try dbg_info_buffer.ensureUnusedCapacity(2);
dbg_info_buffer.appendAssumeCapacity(@sizeOf(usize));
// DW.AT.structure_type delimit children
dbg_info_buffer.appendAssumeCapacity(0);
} else {
@ -3278,7 +3311,7 @@ fn addDbgInfoType(
// DW.AT.structure_type
try dbg_info_buffer.append(abbrev_struct_type);
// DW.AT.byte_size, DW.FORM.sdata
const abi_size = ty.abiSize(self.base.options.target);
const abi_size = ty.abiSize(target);
try leb128.writeULEB128(dbg_info_buffer.writer(), abi_size);
// DW.AT.name, DW.FORM.string
const struct_name = try ty.nameAlloc(arena);
@ -3306,7 +3339,7 @@ fn addDbgInfoType(
try dbg_info_buffer.resize(index + 4);
try relocs.append(.{ .ty = field.ty, .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
const field_off = ty.structFieldOffset(field_index, self.base.options.target);
const field_off = ty.structFieldOffset(field_index, target);
try leb128.writeULEB128(dbg_info_buffer.writer(), field_off);
}