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std.debug: fix an invalid read in StackIterator.next()

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We're overwriting the memory that unwind_context sits in, so we need to do the
getFp() call earlier.
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Alex Rønne Petersen 2025-10-14 23:07:22 +02:00
parent a36dab2f90
commit 62a8cfd5fe
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1 changed files with 2 additions and 1 deletions
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lib/std/debug.zig
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@ -925,7 +925,8 @@ const StackIterator = union(enum) {
const di_gpa = getDebugInfoAllocator(); const di_gpa = getDebugInfoAllocator();
const ret_addr = di.unwindFrame(di_gpa, unwind_context) catch |err| { const ret_addr = di.unwindFrame(di_gpa, unwind_context) catch |err| {
const pc = unwind_context.pc; const pc = unwind_context.pc;
it.* = .{ .fp = unwind_context.getFp() }; const fp = unwind_context.getFp();
it.* = .{ .fp = fp };
return .{ .switch_to_fp = .{ return .{ .switch_to_fp = .{
.address = pc, .address = pc,
.err = err, .err = err,