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dwarf: add explicit_fde_offset to support more optimal __unwind_info dwarf lookups

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kcbanner
2023-07-16 22:07:20 -04:00
parent bdb0a6fa77
commit 774dc2fdb7
3 changed files with 77 additions and 19 deletions
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3
lib/std/debug.zig
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@@ -653,7 +653,7 @@ pub const StackIterator = struct {
}
if (try module.getDwarfInfoForAddress(unwind_state.debug_info.allocator, unwind_state.dwarf_context.pc)) |di| {
return di.unwindFrame(&unwind_state.dwarf_context, module.base_address);
return di.unwindFrame(&unwind_state.dwarf_context, null);
} else return error.MissingDebugInfo;
}
@@ -1894,7 +1894,6 @@ pub const DebugInfo = struct {
obj_di.* = try readElfDebugInfo(self.allocator, if (ctx.name.len > 0) ctx.name else null, ctx.build_id, null, &sections, null);
obj_di.base_address = ctx.base_address;
// TODO: Don't actually scan everything, search on demand
// Missing unwind info isn't treated as a failure, as the unwinder will fall back to FP-based unwinding
obj_di.dwarf.scanAllUnwindInfo(self.allocator, ctx.base_address) catch {};