d424fafbce
On cf_x86_phone-userdebug, both of the unwind through signal tests fail. This has been failing forever, but seems to have suddenly become an issue, so disable while I try to figure out why this is happening. Bug: 132763120 Test: Ran on emulator and verified tests are skipped. Change-Id: Iafc227d972a7783e94c701d73078c9570cea288e
133 lines
3.8 KiB
C++
133 lines
3.8 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 "SignalUtils.h"
|
|
|
|
#define noinline __attribute__((__noinline__))
|
|
#define __unused __attribute__((__unused__))
|
|
|
|
_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);
|
|
}
|
|
|
|
struct UnwindData {
|
|
volatile bool signal_handler_complete = false;
|
|
int expected_frame_count = 0;
|
|
int handler_frame_count = 0;
|
|
int handler_one_deeper_frame_count = 0;
|
|
};
|
|
|
|
static UnwindData g_unwind_data;
|
|
|
|
static void noinline UnwindSignalHandler(int) {
|
|
_Unwind_Backtrace(FrameCounter, &g_unwind_data.handler_frame_count);
|
|
|
|
g_unwind_data.handler_one_deeper_frame_count = unwind_one_frame_deeper();
|
|
g_unwind_data.signal_handler_complete = true;
|
|
}
|
|
|
|
static void verify_unwind_data(const UnwindData& unwind_data) {
|
|
// In order to avoid a false positive, the caller must have at least 2 frames
|
|
// outside of the signal handler. This avoids a case where the only frame
|
|
// right after the signal handler winds up being garbage.
|
|
EXPECT_GT(unwind_data.handler_frame_count, unwind_data.expected_frame_count + 1);
|
|
|
|
EXPECT_EQ(unwind_data.handler_frame_count + 1, unwind_data.handler_one_deeper_frame_count);
|
|
}
|
|
|
|
static void noinline UnwindTest() {
|
|
g_unwind_data = {};
|
|
|
|
_Unwind_Backtrace(FrameCounter, &g_unwind_data.expected_frame_count);
|
|
ASSERT_LE(2, g_unwind_data.expected_frame_count)
|
|
<< "The current call must contain at least 2 frames for the test to be valid.";
|
|
|
|
ASSERT_EQ(0, kill(getpid(), SIGUSR1));
|
|
while (!g_unwind_data.signal_handler_complete) {}
|
|
|
|
verify_unwind_data(g_unwind_data);
|
|
}
|
|
|
|
TEST(stack_unwinding, unwind_through_signal_frame) {
|
|
#if defined(__i386__)
|
|
GTEST_SKIP() << "Temporarily skip test since it fails on x86 see b/132763120.";
|
|
#endif
|
|
|
|
ScopedSignalHandler ssh(SIGUSR1, UnwindSignalHandler);
|
|
|
|
UnwindTest();
|
|
}
|
|
|
|
// On LP32, the SA_SIGINFO flag gets you __restore_rt instead of __restore.
|
|
TEST(stack_unwinding, unwind_through_signal_frame_SA_SIGINFO) {
|
|
#if defined(__i386__)
|
|
GTEST_SKIP() << "Temporarily skip test since it fails on x86 see b/132763120.";
|
|
#endif
|
|
|
|
ScopedSignalHandler ssh(SIGUSR1, UnwindSignalHandler, SA_SIGINFO);
|
|
|
|
UnwindTest();
|
|
}
|