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/*
* Copyright (C) 2012 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.
*/
#ifndef CRASH_REPORTER_CRASH_COLLECTOR_H_
#define CRASH_REPORTER_CRASH_COLLECTOR_H_
#include <sys/stat.h>
#include <map>
#include <string>
#include <base/files/file_path.h>
#include <base/macros.h>
#include <gtest/gtest_prod.h> // for FRIEND_TEST
// User crash collector.
class CrashCollector {
public:
typedef void (*CountCrashFunction)();
typedef bool (*IsFeedbackAllowedFunction)();
CrashCollector();
virtual ~CrashCollector();
// Initialize the crash collector for detection of crashes, given a
// crash counting function, and metrics collection enabled oracle.
void Initialize(CountCrashFunction count_crash,
IsFeedbackAllowedFunction is_metrics_allowed);
protected:
friend class CrashCollectorTest;
FRIEND_TEST(ChromeCollectorTest, HandleCrash);
FRIEND_TEST(CrashCollectorTest, CheckHasCapacityCorrectBasename);
FRIEND_TEST(CrashCollectorTest, CheckHasCapacityStrangeNames);
FRIEND_TEST(CrashCollectorTest, CheckHasCapacityUsual);
FRIEND_TEST(CrashCollectorTest, GetCrashDirectoryInfo);
FRIEND_TEST(CrashCollectorTest, GetCrashPath);
FRIEND_TEST(CrashCollectorTest, GetLogContents);
FRIEND_TEST(CrashCollectorTest, ForkExecAndPipe);
FRIEND_TEST(CrashCollectorTest, FormatDumpBasename);
FRIEND_TEST(CrashCollectorTest, Initialize);
FRIEND_TEST(CrashCollectorTest, MetaData);
FRIEND_TEST(CrashCollectorTest, Sanitize);
FRIEND_TEST(CrashCollectorTest, WriteNewFile);
FRIEND_TEST(ForkExecAndPipeTest, Basic);
FRIEND_TEST(ForkExecAndPipeTest, NonZeroReturnValue);
FRIEND_TEST(ForkExecAndPipeTest, BadOutputFile);
FRIEND_TEST(ForkExecAndPipeTest, ExistingOutputFile);
FRIEND_TEST(ForkExecAndPipeTest, BadExecutable);
FRIEND_TEST(ForkExecAndPipeTest, StderrCaptured);
FRIEND_TEST(ForkExecAndPipeTest, NULLParam);
FRIEND_TEST(ForkExecAndPipeTest, NoParams);
FRIEND_TEST(ForkExecAndPipeTest, SegFaultHandling);
// Set maximum enqueued crashes in a crash directory.
static const int kMaxCrashDirectorySize;
// Writes |data| of |size| to |filename|, which must be a new file.
// If the file already exists or writing fails, return a negative value.
// Otherwise returns the number of bytes written.
int WriteNewFile(const base::FilePath &filename, const char *data, int size);
// Return a filename that has only [a-z0-1_] characters by mapping
// all others into '_'.
std::string Sanitize(const std::string &name);
// For testing, set the directory always returned by
// GetCreatedCrashDirectoryByEuid.
void ForceCrashDirectory(const base::FilePath &forced_directory) {
forced_crash_directory_ = forced_directory;
}
base::FilePath GetCrashDirectoryInfo(mode_t *mode,
uid_t *directory_owner,
gid_t *directory_group);
bool GetUserInfoFromName(const std::string &name,
uid_t *uid,
gid_t *gid);
// Determines the crash directory for given euid, and creates the
// directory if necessary with appropriate permissions. If
// |out_of_capacity| is not nullptr, it is set to indicate if the call
// failed due to not having capacity in the crash directory. Returns
// true whether or not directory needed to be created, false on any
// failure. If the crash directory is at capacity, returns false.
bool GetCreatedCrashDirectoryByEuid(uid_t euid,
base::FilePath *crash_file_path,
bool *out_of_capacity);
// Format crash name based on components.
std::string FormatDumpBasename(const std::string &exec_name,
time_t timestamp,
pid_t pid);
// Create a file path to a file in |crash_directory| with the given
// |basename| and |extension|.
base::FilePath GetCrashPath(const base::FilePath &crash_directory,
const std::string &basename,
const std::string &extension);
base::FilePath GetProcessPath(pid_t pid);
bool GetSymlinkTarget(const base::FilePath &symlink,
base::FilePath *target);
bool GetExecutableBaseNameFromPid(pid_t pid,
std::string *base_name);
// Check given crash directory still has remaining capacity for another
// crash.
bool CheckHasCapacity(const base::FilePath &crash_directory);
// Write a log applicable to |exec_name| to |output_file| based on the
// log configuration file at |config_path|.
bool GetLogContents(const base::FilePath &config_path,
const std::string &exec_name,
const base::FilePath &output_file);
// Add non-standard meta data to the crash metadata file. Call
// before calling WriteCrashMetaData. Key must not contain "=" or
// "\n" characters. Value must not contain "\n" characters.
void AddCrashMetaData(const std::string &key, const std::string &value);
// Add a file to be uploaded to the crash reporter server. The file must
// persist until the crash report is sent; ideally it should live in the same
// place as the .meta file, so it can be cleaned up automatically.
void AddCrashMetaUploadFile(const std::string &key, const std::string &path);
// Add non-standard meta data to the crash metadata file.
// Data added though this call will be uploaded to the crash reporter server,
// appearing as a form field.
void AddCrashMetaUploadData(const std::string &key, const std::string &value);
// Write a file of metadata about crash.
void WriteCrashMetaData(const base::FilePath &meta_path,
const std::string &exec_name,
const std::string &payload_path);
// Returns true if the a crash test is currently running.
bool IsCrashTestInProgress();
// Returns true if we should consider ourselves to be running on a
// developer image.
bool IsDeveloperImage();
CountCrashFunction count_crash_function_;
IsFeedbackAllowedFunction is_feedback_allowed_function_;
std::string extra_metadata_;
base::FilePath forced_crash_directory_;
base::FilePath log_config_path_;
private:
DISALLOW_COPY_AND_ASSIGN(CrashCollector);
};
#endif // CRASH_REPORTER_CRASH_COLLECTOR_H_
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