110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/*
|
|
* 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 <gtest/gtest.h>
|
|
|
|
#include <dlfcn.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <unwind.h>
|
|
|
|
#include "ScopedSignalHandler.h"
|
|
|
|
#define noinline __attribute__((__noinline__))
|
|
#define __unused __attribute__((__unused__))
|
|
|
|
static _Unwind_Reason_Code FrameCounter(_Unwind_Context* ctx __unused, void* arg) {
|
|
int* count_ptr = reinterpret_cast<int*>(arg);
|
|
|
|
#if SHOW_FRAME_LOCATIONS
|
|
void* ip = reinterpret_cast<void*>(_Unwind_GetIP(ctx));
|
|
|
|
const char* symbol = "<unknown>";
|
|
int offset = 0;
|
|
|
|
Dl_info info;
|
|
memset(&info, 0, sizeof(info));
|
|
if (dladdr(ip, &info) != 0) {
|
|
symbol = info.dli_sname;
|
|
if (info.dli_saddr != nullptr) {
|
|
offset = static_cast<int>(reinterpret_cast<char*>(ip) - reinterpret_cast<char*>(info.dli_saddr));
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, " #%02d %p %s%+d (%s)\n", *count_ptr, ip, symbol, offset, info.dli_fname ? info.dli_fname : "??");
|
|
fflush(stderr);
|
|
#endif
|
|
|
|
++*count_ptr;
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
static int noinline unwind_one_frame_deeper() {
|
|
int count = 0;
|
|
_Unwind_Backtrace(FrameCounter, &count);
|
|
return count;
|
|
}
|
|
|
|
TEST(stack_unwinding, easy) {
|
|
int count = 0;
|
|
_Unwind_Backtrace(FrameCounter, &count);
|
|
int deeper_count = unwind_one_frame_deeper();
|
|
ASSERT_EQ(count + 1, deeper_count);
|
|
}
|
|
|
|
static volatile bool signal_handler_run = false;
|
|
static int killer_count = 0;
|
|
static int handler_count = 0;
|
|
static int handler_one_deeper_count = 0;
|
|
|
|
static void noinline UnwindSignalHandler(int) {
|
|
_Unwind_Backtrace(FrameCounter, &handler_count);
|
|
ASSERT_GT(handler_count, killer_count);
|
|
|
|
handler_one_deeper_count = unwind_one_frame_deeper();
|
|
ASSERT_EQ(handler_count + 1, handler_one_deeper_count);
|
|
signal_handler_run = true;
|
|
}
|
|
|
|
TEST(stack_unwinding, unwind_through_signal_frame) {
|
|
killer_count = handler_count = handler_one_deeper_count = 0;
|
|
ScopedSignalHandler ssh(SIGUSR1, UnwindSignalHandler);
|
|
|
|
_Unwind_Backtrace(FrameCounter, &killer_count);
|
|
signal_handler_run = false;
|
|
ASSERT_EQ(0, kill(getpid(), SIGUSR1));
|
|
while (!signal_handler_run) {}
|
|
}
|
|
|
|
// On LP32, the SA_SIGINFO flag gets you __restore_rt instead of __restore.
|
|
TEST(stack_unwinding, unwind_through_signal_frame_SA_SIGINFO) {
|
|
killer_count = handler_count = handler_one_deeper_count = 0;
|
|
ScopedSignalHandler ssh(SIGUSR1, UnwindSignalHandler, SA_SIGINFO);
|
|
|
|
_Unwind_Backtrace(FrameCounter, &killer_count);
|
|
signal_handler_run = false;
|
|
ASSERT_EQ(0, kill(getpid(), SIGUSR1));
|
|
while (!signal_handler_run) {}
|
|
}
|