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dwarf: add debug info for tuples and anon structs

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This commit is contained in:
Jakub Konka 2022-03-24 14:40:58 +01:00
parent 2af69710a7
commit 2286f9bd1f
1 changed files with 50 additions and 32 deletions
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82
src/link/Dwarf.zig
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@ -881,45 +881,63 @@ fn addDbgInfoType(
}
},
.Struct => blk: {
if (ty.tag() == .tuple) {
log.debug("TODO implement .debug_info for type '{}'", .{ty.fmtDebug()});
try dbg_info_buffer.append(abbrev_pad1);
break :blk;
}
// try dbg_info_buffer.ensureUnusedCapacity(23);
// 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
const struct_name = try ty.nameAllocArena(arena, target);
try dbg_info_buffer.ensureUnusedCapacity(struct_name.len + 1);
dbg_info_buffer.appendSliceAssumeCapacity(struct_name);
dbg_info_buffer.appendAssumeCapacity(0);
const struct_obj = ty.castTag(.@"struct").?.data;
if (struct_obj.layout == .Packed) {
log.debug("TODO implement .debug_info for packed structs", .{});
break :blk;
}
switch (ty.tag()) {
.tuple, .anon_struct => {
// DW.AT.name, DW.FORM.string
try dbg_info_buffer.writer().print("{}\x00", .{ty.fmt(target)});
const fields = ty.structFields();
for (fields.keys()) |field_name, field_index| {
const field = fields.get(field_name).?;
// DW.AT.member
try dbg_info_buffer.ensureUnusedCapacity(field_name.len + 2);
dbg_info_buffer.appendAssumeCapacity(abbrev_struct_member);
// DW.AT.name, DW.FORM.string
dbg_info_buffer.appendSliceAssumeCapacity(field_name);
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 = field.ty, .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
const field_off = ty.structFieldOffset(field_index, target);
try leb128.writeULEB128(dbg_info_buffer.writer(), field_off);
const fields = ty.tupleFields();
for (fields.types) |field, field_index| {
// DW.AT.member
try dbg_info_buffer.append(abbrev_struct_member);
// DW.AT.name, DW.FORM.string
try dbg_info_buffer.writer().print("{d}\x00", .{field_index});
// DW.AT.type, DW.FORM.ref4
var index = dbg_info_buffer.items.len;
try dbg_info_buffer.resize(index + 4);
try relocs.append(.{ .ty = field, .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
const field_off = ty.structFieldOffset(field_index, target);
try leb128.writeULEB128(dbg_info_buffer.writer(), field_off);
}
},
else => {
// DW.AT.name, DW.FORM.string
const struct_name = try ty.nameAllocArena(arena, target);
try dbg_info_buffer.ensureUnusedCapacity(struct_name.len + 1);
dbg_info_buffer.appendSliceAssumeCapacity(struct_name);
dbg_info_buffer.appendAssumeCapacity(0);
const struct_obj = ty.castTag(.@"struct").?.data;
if (struct_obj.layout == .Packed) {
log.debug("TODO implement .debug_info for packed structs", .{});
break :blk;
}
const fields = ty.structFields();
for (fields.keys()) |field_name, field_index| {
const field = fields.get(field_name).?;
// DW.AT.member
try dbg_info_buffer.ensureUnusedCapacity(field_name.len + 2);
dbg_info_buffer.appendAssumeCapacity(abbrev_struct_member);
// DW.AT.name, DW.FORM.string
dbg_info_buffer.appendSliceAssumeCapacity(field_name);
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 = field.ty, .reloc = @intCast(u32, index) });
// DW.AT.data_member_location, DW.FORM.sdata
const field_off = ty.structFieldOffset(field_index, target);
try leb128.writeULEB128(dbg_info_buffer.writer(), field_off);
}
},
}
// DW.AT.structure_type delimit children