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Differential D90898 Diff 316319 libunwind/test/unwind_leaffunction.pass.cpp

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libunwind/test/unwind_leaffunction.pass.cpp

// -*- C++ -*- // -*- C++ -*-
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// //
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information. // See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// Ensure that leaf function can be unwund. // Ensure that leaf function can be unwund.
// REQUIRES: x86_64-linux // REQUIRES: linux && (target-aarch64 || target-x86_64)
#include <assert.h> #include <assert.h>
#include <dlfcn.h> #include <dlfcn.h>
#include <signal.h> #include <signal.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <unwind.h> #include <unwind.h>
_Unwind_Reason_Code frame_handler(struct _Unwind_Context* ctx, void* arg) { _Unwind_Reason_Code frame_handler(struct _Unwind_Context* ctx, void* arg) {
(void)arg; (void)arg;
Dl_info info = { 0, 0, 0, 0 }; Dl_info info = { 0, 0, 0, 0 };
assert(dladdr((void*)_Unwind_GetIP(ctx), &info));
// Unwind util the main is reached, above frames deeped on the platfrom and architecture. // Unwind util the main is reached, above frames deeped on the platfrom and architecture.
if(info.dli_sname && !strcmp("main", info.dli_sname)) { if (dladdr(reinterpret_cast<void *>(_Unwind_GetIP(ctx)), &info) &&
info.dli_sname && !strcmp("main", info.dli_sname)) {
_Exit(0); _Exit(0);
} }
return _URC_NO_REASON; return _URC_NO_REASON;
} }
void signal_handler(int signum) { void signal_handler(int signum) {
(void)signum; (void)signum;
_Unwind_Backtrace(frame_handler, NULL); _Unwind_Backtrace(frame_handler, NULL);
_Exit(-1); _Exit(-1);
} }
int* faultyPointer = NULL; int* faultyPointer = NULL;
__attribute__((noinline)) void crashing_leaf_func(void) { __attribute__((noinline)) void crashing_leaf_func(void) {
*faultyPointer = 0; *faultyPointer = 0;
} }
int main(int, char**) { int main(int, char**) {
signal(SIGSEGV, signal_handler); signal(SIGSEGV, signal_handler);
crashing_leaf_func(); crashing_leaf_func();
return -2; return -2;
} }
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