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Stack unwinding unit tests.

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Bug: 17436734
Change-Id: I1e98da7eaeab646b448fb3f2b683973dddc319b0
This commit is contained in:
Elliott Hughes
2014-09-17 17:21:20 -07:00
parent 6a310f4ad6
commit bee1993a14
3 changed files with 104 additions and 60 deletions
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51
tests/stack_unwinding_test_impl.c
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@@ -18,52 +18,47 @@
* Contributed by: Intel Corporation
*/
#include <stdio.h>
#include <dlfcn.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <unwind.h>
#define noinline __attribute__((__noinline__))
#define unused __attribute__((__unused__))
static noinline _Unwind_Reason_Code stop_fn(int a unused,
#ifndef __unused
#define __unused __attribute__((__unused__))
#endif
static noinline _Unwind_Reason_Code cleanup_unwind_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) {
_Unwind_Exception_Class b __unused,
struct _Unwind_Exception* c __unused,
struct _Unwind_Context* ctx __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();
abort(); // We reached the end of the stack without executing foo_cleanup (which would have exited). Test failed.
}
return _URC_NO_REASON;
}
static void noinline foo_cleanup(char* param unused) {
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 function_with_cleanup_function() {
char c __attribute__((cleanup(foo_cleanup))) __unused;
*((int*) 1) = 0;
}
static void noinline foo() {
char c1 __attribute__((cleanup(foo_cleanup))) unused;
do_crash();
static void noinline cleanup_sigsegv_handler(int param __unused) {
struct _Unwind_Exception* exception = (struct _Unwind_Exception*) calloc(1, sizeof(*exception));
_Unwind_ForcedUnwind(exception, cleanup_unwind_fn, 0);
}
// 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();
void unwind_through_frame_with_cleanup_function() {
signal(SIGSEGV, &cleanup_sigsegv_handler);
function_with_cleanup_function();
}