diff options
Diffstat (limited to 'libunwind/test/unwind_leaffunction.pass.cpp')
| -rw-r--r-- | libunwind/test/unwind_leaffunction.pass.cpp | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/libunwind/test/unwind_leaffunction.pass.cpp b/libunwind/test/unwind_leaffunction.pass.cpp index 112a5968247a..98de7dc43260 100644 --- a/libunwind/test/unwind_leaffunction.pass.cpp +++ b/libunwind/test/unwind_leaffunction.pass.cpp @@ -13,9 +13,15 @@ // TODO: Figure out why this fails with Memory Sanitizer. // XFAIL: msan +// Note: this test fails on musl because: +// +// (a) musl disables emission of unwind information for its build, and +// (b) musl's signal trampolines don't include unwind information +// +// XFAIL: target={{.*}}-musl + #undef NDEBUG #include <assert.h> -#include <dlfcn.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> @@ -24,16 +30,24 @@ #include <unistd.h> #include <unwind.h> +// Using __attribute__((section("main_func"))) is ELF specific, but then +// this entire test is marked as requiring Linux, so we should be good. +// +// We don't use dladdr() because on musl it's a no-op when statically linked. +extern char __start_main_func; +extern char __stop_main_func; + _Unwind_Reason_Code frame_handler(struct _Unwind_Context* ctx, void* arg) { (void)arg; - Dl_info info = { 0, 0, 0, 0 }; // Unwind until the main is reached, above frames depend on the platform and // architecture. - if (dladdr(reinterpret_cast<void *>(_Unwind_GetIP(ctx)), &info) && - info.dli_sname && !strcmp("main", info.dli_sname)) { + uintptr_t ip = _Unwind_GetIP(ctx); + if (ip >= (uintptr_t)&__start_main_func && + ip < (uintptr_t)&__stop_main_func) { _Exit(0); } + return _URC_NO_REASON; } @@ -56,7 +70,7 @@ __attribute__((noinline)) void crashing_leaf_func(int do_trap) { __builtin_trap(); } -int main(int, char**) { +__attribute__((section("main_func"))) int main(int, char **) { signal(SIGTRAP, signal_handler); signal(SIGILL, signal_handler); crashing_leaf_func(1); |