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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Contributed by: Intel Corporation
*/
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unwind.h>
#define noinline __attribute__((__noinline__))
#define unused __attribute__((__unused__))
static noinline _Unwind_Reason_Code stop_fn(int a unused,
_Unwind_Action action,
_Unwind_Exception_Class b unused, struct _Unwind_Exception* c unused,
struct _Unwind_Context* d unused, void* e unused) {
if ((action & _UA_END_OF_STACK) != 0) {
// We reached the end of the stack without executing foo_cleanup. Test failed.
abort();
}
return _URC_NO_REASON;
}
static void noinline foo_cleanup(char* param unused) {
exit(42);
}
static void noinline do_crash() {
char* ptr = NULL;
*ptr = 0; // Deliberately cause a SIGSEGV.
}
static void noinline foo() {
char c1 __attribute__((cleanup(foo_cleanup))) unused;
do_crash();
}
// It's SEGSEGV handler. We start forced stack unwinding here.
// If libgcc don't find dso for signal frame stack unwinding will be finished.
// libgcc pass to stop_fn _UA_END_OF_STACK flag.
// Test pass condition: stack unwinding through signal frame and foo1_handler execution.
static void noinline sigsegv_handler(int param unused) {
struct _Unwind_Exception* exception = (struct _Unwind_Exception*) malloc(sizeof(*exception));
memset(&exception->exception_class, 0, sizeof(exception->exception_class));
exception->exception_cleanup = 0;
_Unwind_ForcedUnwind(exception, stop_fn, 0);
}
void do_test() {
signal(SIGSEGV, &sigsegv_handler);
foo();
}
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