mirror of
https://github.com/chromium/crashpad.git
synced 2024-12-27 07:14:10 +08:00
00ce1f9f8f
Bug: chromium:1459865 Change-Id: I28d5caa739c5b59f4af1f062616443aa16fadfa1 Fixed: chromium:1459862 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/4663174 Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org>
293 lines
8.5 KiB
C++
293 lines
8.5 KiB
C++
// Copyright 2017 The Crashpad Authors
|
|
//
|
|
// 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.
|
|
|
|
#include "util/linux/ptrace_broker.h"
|
|
|
|
#include <sys/socket.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#include <utility>
|
|
|
|
#include "build/build_config.h"
|
|
#include "gtest/gtest.h"
|
|
#include "test/filesystem.h"
|
|
#include "test/linux/get_tls.h"
|
|
#include "test/multiprocess.h"
|
|
#include "test/scoped_temp_dir.h"
|
|
#include "util/file/file_io.h"
|
|
#include "util/linux/ptrace_client.h"
|
|
#include "util/posix/scoped_mmap.h"
|
|
#include "util/synchronization/semaphore.h"
|
|
#include "util/thread/thread.h"
|
|
|
|
namespace crashpad {
|
|
namespace test {
|
|
namespace {
|
|
|
|
class ScopedTimeoutThread : public Thread {
|
|
public:
|
|
ScopedTimeoutThread() : join_sem_(0) {}
|
|
|
|
ScopedTimeoutThread(const ScopedTimeoutThread&) = delete;
|
|
ScopedTimeoutThread& operator=(const ScopedTimeoutThread&) = delete;
|
|
|
|
~ScopedTimeoutThread() { EXPECT_TRUE(JoinWithTimeout(5.0)); }
|
|
|
|
protected:
|
|
void ThreadMain() override { join_sem_.Signal(); }
|
|
|
|
private:
|
|
bool JoinWithTimeout(double timeout) {
|
|
if (!join_sem_.TimedWait(timeout)) {
|
|
return false;
|
|
}
|
|
Join();
|
|
return true;
|
|
}
|
|
|
|
Semaphore join_sem_;
|
|
};
|
|
|
|
class RunBrokerThread : public ScopedTimeoutThread {
|
|
public:
|
|
RunBrokerThread(PtraceBroker* broker)
|
|
: ScopedTimeoutThread(), broker_(broker) {}
|
|
|
|
RunBrokerThread(const RunBrokerThread&) = delete;
|
|
RunBrokerThread& operator=(const RunBrokerThread&) = delete;
|
|
|
|
~RunBrokerThread() {}
|
|
|
|
private:
|
|
void ThreadMain() override {
|
|
EXPECT_EQ(broker_->Run(), 0);
|
|
ScopedTimeoutThread::ThreadMain();
|
|
}
|
|
|
|
PtraceBroker* broker_;
|
|
};
|
|
|
|
class BlockOnReadThread : public ScopedTimeoutThread {
|
|
public:
|
|
BlockOnReadThread(int readfd, int writefd)
|
|
: ScopedTimeoutThread(), readfd_(readfd), writefd_(writefd) {}
|
|
|
|
BlockOnReadThread(const BlockOnReadThread&) = delete;
|
|
BlockOnReadThread& operator=(const BlockOnReadThread&) = delete;
|
|
|
|
~BlockOnReadThread() {}
|
|
|
|
private:
|
|
void ThreadMain() override {
|
|
pid_t pid = syscall(SYS_gettid);
|
|
LoggingWriteFile(writefd_, &pid, sizeof(pid));
|
|
|
|
LinuxVMAddress tls = GetTLS();
|
|
LoggingWriteFile(writefd_, &tls, sizeof(tls));
|
|
|
|
CheckedReadFileAtEOF(readfd_);
|
|
ScopedTimeoutThread::ThreadMain();
|
|
}
|
|
|
|
int readfd_;
|
|
int writefd_;
|
|
};
|
|
|
|
class SameBitnessTest : public Multiprocess {
|
|
public:
|
|
SameBitnessTest() : Multiprocess(), mapping_() {}
|
|
|
|
SameBitnessTest(const SameBitnessTest&) = delete;
|
|
SameBitnessTest& operator=(const SameBitnessTest&) = delete;
|
|
|
|
~SameBitnessTest() {}
|
|
|
|
protected:
|
|
void PreFork() override {
|
|
ASSERT_NO_FATAL_FAILURE(Multiprocess::PreFork());
|
|
|
|
size_t page_size = getpagesize();
|
|
ASSERT_TRUE(mapping_.ResetMmap(nullptr,
|
|
page_size * 3,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANON,
|
|
-1,
|
|
0));
|
|
ASSERT_TRUE(mapping_.ResetAddrLen(mapping_.addr(), page_size * 2));
|
|
|
|
auto buffer = mapping_.addr_as<char*>();
|
|
for (size_t index = 0; index < mapping_.len(); ++index) {
|
|
buffer[index] = index % 256;
|
|
}
|
|
}
|
|
|
|
private:
|
|
void BrokerTests(bool set_broker_pid,
|
|
LinuxVMAddress child1_tls,
|
|
LinuxVMAddress child2_tls,
|
|
pid_t child2_tid,
|
|
const base::FilePath& file_dir,
|
|
const base::FilePath& test_file,
|
|
const std::string& expected_file_contents) {
|
|
int socks[2];
|
|
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, socks), 0);
|
|
ScopedFileHandle broker_sock(socks[0]);
|
|
ScopedFileHandle client_sock(socks[1]);
|
|
|
|
#if defined(ARCH_CPU_64_BITS)
|
|
constexpr bool am_64_bit = true;
|
|
#else
|
|
constexpr bool am_64_bit = false;
|
|
#endif // ARCH_CPU_64_BITS
|
|
|
|
PtraceBroker broker(
|
|
broker_sock.get(), set_broker_pid ? ChildPID() : -1, am_64_bit);
|
|
RunBrokerThread broker_thread(&broker);
|
|
broker_thread.Start();
|
|
|
|
PtraceClient client;
|
|
ASSERT_TRUE(client.Initialize(client_sock.get(), ChildPID()));
|
|
|
|
EXPECT_EQ(client.GetProcessID(), ChildPID());
|
|
|
|
std::vector<pid_t> threads;
|
|
ASSERT_TRUE(client.Threads(&threads));
|
|
EXPECT_EQ(threads.size(), 2u);
|
|
if (threads[0] == ChildPID()) {
|
|
EXPECT_EQ(threads[1], child2_tid);
|
|
} else {
|
|
EXPECT_EQ(threads[0], child2_tid);
|
|
EXPECT_EQ(threads[1], ChildPID());
|
|
}
|
|
|
|
EXPECT_TRUE(client.Attach(child2_tid));
|
|
EXPECT_EQ(client.Is64Bit(), am_64_bit);
|
|
|
|
ThreadInfo info1;
|
|
ASSERT_TRUE(client.GetThreadInfo(ChildPID(), &info1));
|
|
EXPECT_EQ(info1.thread_specific_data_address, child1_tls);
|
|
|
|
ThreadInfo info2;
|
|
ASSERT_TRUE(client.GetThreadInfo(child2_tid, &info2));
|
|
EXPECT_EQ(info2.thread_specific_data_address, child2_tls);
|
|
|
|
auto expected_buffer = mapping_.addr_as<char*>();
|
|
char first;
|
|
ASSERT_EQ(
|
|
client.ReadUpTo(mapping_.addr_as<VMAddress>(), sizeof(first), &first),
|
|
1);
|
|
EXPECT_EQ(first, expected_buffer[0]);
|
|
|
|
char last;
|
|
ASSERT_EQ(
|
|
client.ReadUpTo(mapping_.addr_as<VMAddress>() + mapping_.len() - 1,
|
|
sizeof(last),
|
|
&last),
|
|
1);
|
|
EXPECT_EQ(last, expected_buffer[mapping_.len() - 1]);
|
|
|
|
char unmapped;
|
|
EXPECT_EQ(client.ReadUpTo(mapping_.addr_as<VMAddress>() + mapping_.len(),
|
|
sizeof(unmapped),
|
|
&unmapped),
|
|
-1);
|
|
|
|
std::string file_root = file_dir.value() + '/';
|
|
broker.SetFileRoot(file_root.c_str());
|
|
|
|
std::string file_contents;
|
|
ASSERT_TRUE(client.ReadFileContents(test_file, &file_contents));
|
|
EXPECT_EQ(file_contents, expected_file_contents);
|
|
|
|
ScopedTempDir temp_dir2;
|
|
base::FilePath test_file2(temp_dir2.path().Append("test_file2"));
|
|
ASSERT_TRUE(CreateFile(test_file2));
|
|
EXPECT_FALSE(client.ReadFileContents(test_file2, &file_contents));
|
|
}
|
|
|
|
void MultiprocessParent() override {
|
|
LinuxVMAddress child1_tls;
|
|
ASSERT_TRUE(LoggingReadFileExactly(
|
|
ReadPipeHandle(), &child1_tls, sizeof(child1_tls)));
|
|
|
|
pid_t child2_tid;
|
|
ASSERT_TRUE(LoggingReadFileExactly(
|
|
ReadPipeHandle(), &child2_tid, sizeof(child2_tid)));
|
|
|
|
LinuxVMAddress child2_tls;
|
|
ASSERT_TRUE(LoggingReadFileExactly(
|
|
ReadPipeHandle(), &child2_tls, sizeof(child2_tls)));
|
|
|
|
ScopedTempDir temp_dir;
|
|
base::FilePath file_path(temp_dir.path().Append("test_file"));
|
|
std::string expected_file_contents;
|
|
{
|
|
expected_file_contents.resize(4097);
|
|
for (size_t i = 0; i < expected_file_contents.size(); ++i) {
|
|
expected_file_contents[i] = static_cast<char>(i % 256);
|
|
}
|
|
ScopedFileHandle handle(
|
|
LoggingOpenFileForWrite(file_path,
|
|
FileWriteMode::kCreateOrFail,
|
|
FilePermissions::kWorldReadable));
|
|
ASSERT_TRUE(LoggingWriteFile(handle.get(),
|
|
expected_file_contents.data(),
|
|
expected_file_contents.size()));
|
|
}
|
|
|
|
BrokerTests(true,
|
|
child1_tls,
|
|
child2_tls,
|
|
child2_tid,
|
|
temp_dir.path(),
|
|
file_path,
|
|
expected_file_contents);
|
|
BrokerTests(false,
|
|
child1_tls,
|
|
child2_tls,
|
|
child2_tid,
|
|
temp_dir.path(),
|
|
file_path,
|
|
expected_file_contents);
|
|
}
|
|
|
|
void MultiprocessChild() override {
|
|
LinuxVMAddress tls = GetTLS();
|
|
ASSERT_TRUE(LoggingWriteFile(WritePipeHandle(), &tls, sizeof(tls)));
|
|
|
|
BlockOnReadThread thread(ReadPipeHandle(), WritePipeHandle());
|
|
thread.Start();
|
|
|
|
CheckedReadFileAtEOF(ReadPipeHandle());
|
|
}
|
|
|
|
ScopedMmap mapping_;
|
|
};
|
|
|
|
// TODO(https://crbug.com/1459865): This test consistently fails on ASAN/LSAN
|
|
// but it's not clear if this test is correct in the general case (see comment 2
|
|
// on that issue).
|
|
TEST(PtraceBroker, DISABLED_SameBitness) {
|
|
SameBitnessTest test;
|
|
test.Run();
|
|
}
|
|
|
|
// TODO(jperaza): Test against a process with different bitness.
|
|
|
|
} // namespace
|
|
} // namespace test
|
|
} // namespace crashpad
|