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compiler: Improve the handling of unwind table levels.

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The goal here is to support both levels of unwind tables (sync and async) in
zig cc and zig build. Previously, the LLVM backend always used async tables
while zig cc was partially influenced by whatever was Clang's default.
This commit is contained in:
Alex Rønne Petersen
2024-11-13 06:04:04 +01:00
parent 0b67463b92
commit 8af82621d7
16 changed files with 174 additions and 53 deletions
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7
src/Package/Module.zig
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@@ -27,7 +27,7 @@ red_zone: bool,
sanitize_c: bool,
sanitize_thread: bool,
fuzz: bool,
unwind_tables: bool,
unwind_tables: std.builtin.UnwindTables,
cc_argv: []const []const u8,
/// (SPIR-V) whether to generate a structured control flow graph or not
structured_cfg: bool,
@@ -91,7 +91,7 @@ pub const CreateOptions = struct {
/// other number means stack protection with that buffer size.
stack_protector: ?u32 = null,
red_zone: ?bool = null,
unwind_tables: ?bool = null,
unwind_tables: ?std.builtin.UnwindTables = null,
sanitize_c: ?bool = null,
sanitize_thread: ?bool = null,
fuzz: ?bool = null,
@@ -112,7 +112,7 @@ pub fn create(arena: Allocator, options: CreateOptions) !*Package.Module {
if (options.inherited.sanitize_thread == true) assert(options.global.any_sanitize_thread);
if (options.inherited.fuzz == true) assert(options.global.any_fuzz);
if (options.inherited.single_threaded == false) assert(options.global.any_non_single_threaded);
if (options.inherited.unwind_tables == true) assert(options.global.any_unwind_tables);
if (options.inherited.unwind_tables) |uwt| if (uwt != .none) assert(options.global.any_unwind_tables != .none);
if (options.inherited.error_tracing == true) assert(options.global.any_error_tracing);
const resolved_target = options.inherited.resolved_target orelse options.parent.?.resolved_target;
@@ -382,6 +382,7 @@ pub fn create(arena: Allocator, options: CreateOptions) !*Package.Module {
.zig_backend = zig_backend,
.output_mode = options.global.output_mode,
.link_mode = options.global.link_mode,
.unwind_tables = options.global.any_unwind_tables,
.is_test = options.global.is_test,
.single_threaded = single_threaded,
.link_libc = options.global.link_libc,