mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2026-02-07 23:17:17 +00:00
Code Issues Packages Projects Releases Wiki Activity

macho: fix parsing len of DW_FORM_string

Browse Source
This commit is contained in:
Jakub Konka 2022-11-08 15:45:15 +01:00
parent 7d48cb1138
commit 7145064efd
1 changed files with 16 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
src/link/MachO/DwarfInfo.zig
View File

@ -257,13 +257,21 @@ pub const Attribute = struct {
}
pub fn getString(self: Attribute, ctx: DwarfInfo, cuh: CompileUnit.Header) ?[]const u8 {
if (self.form != dwarf.FORM.strp) return null;
const debug_info = self.getDebugInfo(ctx);
const off = if (cuh.is_64bit)
mem.readIntLittle(u64, debug_info[0..8])
else
mem.readIntLittle(u32, debug_info[0..4]);
return ctx.getString(off);
switch (self.form) {
dwarf.FORM.string => {
return mem.sliceTo(@ptrCast([*:0]const u8, debug_info.ptr), 0);
},
dwarf.FORM.strp => {
const off = if (cuh.is_64bit)
mem.readIntLittle(u64, debug_info[0..8])
else
mem.readIntLittle(u32, debug_info[0..4]);
return ctx.getString(off);
},
else => return null,
}
}
pub fn getConstant(self: Attribute, ctx: DwarfInfo) !?i128 {
@ -440,8 +448,9 @@ fn findFormSize(self: DwarfInfo, form: u64, di_off: usize, cuh: CompileUnit.Head
dwarf.FORM.string => {
var count: usize = 0;
while (true) : (count += 1) {
while (true) {
const byte = try reader.readByte();
count += 1;
if (byte == 0x0) break;
}
return count;