debug: disable fp-based frame unwinding when fp is omitted

jacobly0 · jacobly0 · commit 4f3b59f70805 · 2025-05-28T15:08:39.000-04:00
This has been causing non-deterministic timeouts on aarch64 CI.
diff --git a/lib/std/debug.zig b/lib/std/debug.zig
@@ -932,6 +932,8 @@ pub const StackIterator = struct {
             }
         }
 
+        if (builtin.omit_frame_pointer) return null;
+
         const fp = if (comptime native_arch.isSPARC())
             // On SPARC the offset is positive. (!)
             math.add(usize, it.fp, fp_offset) catch return null

Original file line number	Diff line number	Diff line change
`@@ -932,6 +932,8 @@ pub const StackIterator = struct {`
`932`	`932`	`}`
`933`	`933`	`}`
`934`	`934`
	`935`	`+ if (builtin.omit_frame_pointer) return null;`
	`936`	`+`
`935`	`937`	`const fp = if (comptime native_arch.isSPARC())`
`936`	`938`	`// On SPARC the offset is positive. (!)`
`937`	`939`	`math.add(usize, it.fp, fp_offset) catch return null`