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std.debug: don't attempt SelfInfo unwinding when unsupported

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mlugg 2025-09-12 03:24:24 +01:00
parent cf13b40946
commit 344ab62b3f
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1 changed files with 9 additions and 2 deletions
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11
lib/std/debug.zig
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@ -678,6 +678,12 @@ pub fn writeCurrentStackTrace(options: StackUnwindOptions, writer: *Writer, tty_
tty_config.setColor(writer, .reset) catch {};
return;
},
error.CannotUnwindFromContext => {
tty_config.setColor(writer, .dim) catch {};
try writer.print("Cannot print stack trace: context unwind unavailable for target\n", .{});
tty_config.setColor(writer, .reset) catch {};
return;
},
};
defer it.deinit();
if (!it.stratOk(options.allow_unsafe_unwind)) {
@ -787,7 +793,7 @@ const StackIterator = union(enum) {
/// It is important that this function is marked `inline` so that it can safely use
/// `@frameAddress` and `getContext` as the caller's stack frame and our own are one
/// and the same.
inline fn init(context_opt: ?ThreadContextPtr, context_buf: *ThreadContextBuf) error{OutOfMemory}!StackIterator {
inline fn init(context_opt: ?ThreadContextPtr, context_buf: *ThreadContextBuf) error{ OutOfMemory, CannotUnwindFromContext }!StackIterator {
if (builtin.cpu.arch.isSPARC()) {
// Flush all the register windows on stack.
if (builtin.cpu.has(.sparc, .v9)) {
@ -797,11 +803,12 @@ const StackIterator = union(enum) {
}
}
if (context_opt) |context| {
if (!SelfInfo.supports_unwinding) return error.CannotUnwindFromContext;
context_buf.* = context.*;
relocateContext(context_buf);
return .{ .di = try .init(context_buf, getDebugInfoAllocator()) };
}
if (getContext(context_buf)) {
if (SelfInfo.supports_unwinding and getContext(context_buf)) {
return .{ .di = try .init(context_buf, getDebugInfoAllocator()) };
}
return .{ .fp = @frameAddress() };