mirror of
https://github.com/clementine-player/Clementine
synced 2024-12-25 01:02:37 +01:00
260 lines
11 KiB
C++
260 lines
11 KiB
C++
// Copyright (c) 2010 Google Inc.
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following disclaimer
|
|
// in the documentation and/or other materials provided with the
|
|
// distribution.
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
// contributors may be used to endorse or promote products derived from
|
|
// this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
#ifndef CLIENT_LINUX_HANDLER_EXCEPTION_HANDLER_H_
|
|
#define CLIENT_LINUX_HANDLER_EXCEPTION_HANDLER_H_
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include <pthread.h>
|
|
#include <signal.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
|
|
#if defined(__ANDROID__)
|
|
#include "client/linux/android_ucontext.h"
|
|
#endif
|
|
#include "client/linux/crash_generation/crash_generation_client.h"
|
|
#include "client/linux/minidump_writer/minidump_writer.h"
|
|
#include "google_breakpad/common/minidump_format.h"
|
|
#include "processor/scoped_ptr.h"
|
|
|
|
struct sigaction;
|
|
|
|
namespace google_breakpad {
|
|
|
|
class ExceptionHandler;
|
|
|
|
// ExceptionHandler
|
|
//
|
|
// ExceptionHandler can write a minidump file when an exception occurs,
|
|
// or when WriteMinidump() is called explicitly by your program.
|
|
//
|
|
// To have the exception handler write minidumps when an uncaught exception
|
|
// (crash) occurs, you should create an instance early in the execution
|
|
// of your program, and keep it around for the entire time you want to
|
|
// have crash handling active (typically, until shutdown).
|
|
// (NOTE): There should be only be one this kind of exception handler
|
|
// object per process.
|
|
//
|
|
// If you want to write minidumps without installing the exception handler,
|
|
// you can create an ExceptionHandler with install_handler set to false,
|
|
// then call WriteMinidump. You can also use this technique if you want to
|
|
// use different minidump callbacks for different call sites.
|
|
//
|
|
// In either case, a callback function is called when a minidump is written,
|
|
// which receives the unqiue id of the minidump. The caller can use this
|
|
// id to collect and write additional application state, and to launch an
|
|
// external crash-reporting application.
|
|
//
|
|
// Caller should try to make the callbacks as crash-friendly as possible,
|
|
// it should avoid use heap memory allocation as much as possible.
|
|
class ExceptionHandler {
|
|
public:
|
|
// A callback function to run before Breakpad performs any substantial
|
|
// processing of an exception. A FilterCallback is called before writing
|
|
// a minidump. context is the parameter supplied by the user as
|
|
// callback_context when the handler was created.
|
|
//
|
|
// If a FilterCallback returns true, Breakpad will continue processing,
|
|
// attempting to write a minidump. If a FilterCallback returns false,
|
|
// Breakpad will immediately report the exception as unhandled without
|
|
// writing a minidump, allowing another handler the opportunity to handle it.
|
|
typedef bool (*FilterCallback)(void *context);
|
|
|
|
// A callback function to run after the minidump has been written.
|
|
// minidump_id is a unique id for the dump, so the minidump
|
|
// file is <dump_path>\<minidump_id>.dmp. context is the parameter supplied
|
|
// by the user as callback_context when the handler was created. succeeded
|
|
// indicates whether a minidump file was successfully written.
|
|
//
|
|
// If an exception occurred and the callback returns true, Breakpad will
|
|
// treat the exception as fully-handled, suppressing any other handlers from
|
|
// being notified of the exception. If the callback returns false, Breakpad
|
|
// will treat the exception as unhandled, and allow another handler to handle
|
|
// it. If there are no other handlers, Breakpad will report the exception to
|
|
// the system as unhandled, allowing a debugger or native crash dialog the
|
|
// opportunity to handle the exception. Most callback implementations
|
|
// should normally return the value of |succeeded|, or when they wish to
|
|
// not report an exception of handled, false. Callbacks will rarely want to
|
|
// return true directly (unless |succeeded| is true).
|
|
typedef bool (*MinidumpCallback)(const char *dump_path,
|
|
const char *minidump_id,
|
|
void *context,
|
|
bool succeeded);
|
|
|
|
// In certain cases, a user may wish to handle the generation of the minidump
|
|
// themselves. In this case, they can install a handler callback which is
|
|
// called when a crash has occurred. If this function returns true, no other
|
|
// processing of occurs and the process will shortly be crashed. If this
|
|
// returns false, the normal processing continues.
|
|
typedef bool (*HandlerCallback)(const void* crash_context,
|
|
size_t crash_context_size,
|
|
void* context);
|
|
|
|
// Creates a new ExceptionHandler instance to handle writing minidumps.
|
|
// Before writing a minidump, the optional filter callback will be called.
|
|
// Its return value determines whether or not Breakpad should write a
|
|
// minidump. Minidump files will be written to dump_path, and the optional
|
|
// callback is called after writing the dump file, as described above.
|
|
// If install_handler is true, then a minidump will be written whenever
|
|
// an unhandled exception occurs. If it is false, minidumps will only
|
|
// be written when WriteMinidump is called.
|
|
ExceptionHandler(const std::string &dump_path,
|
|
FilterCallback filter, MinidumpCallback callback,
|
|
void *callback_context,
|
|
bool install_handler);
|
|
|
|
// Creates a new ExceptionHandler instance that can attempt to
|
|
// perform out-of-process dump generation if server_fd is valid. If
|
|
// server_fd is invalid, in-process dump generation will be
|
|
// used. See the above ctor for a description of the other
|
|
// parameters.
|
|
ExceptionHandler(const std::string& dump_path,
|
|
FilterCallback filter, MinidumpCallback callback,
|
|
void* callback_context,
|
|
bool install_handler,
|
|
const int server_fd);
|
|
|
|
~ExceptionHandler();
|
|
|
|
// Get and set the minidump path.
|
|
std::string dump_path() const { return dump_path_; }
|
|
void set_dump_path(const std::string &dump_path) {
|
|
dump_path_ = dump_path;
|
|
dump_path_c_ = dump_path_.c_str();
|
|
UpdateNextID();
|
|
}
|
|
|
|
void set_crash_handler(HandlerCallback callback) {
|
|
crash_handler_ = callback;
|
|
}
|
|
|
|
// Writes a minidump immediately. This can be used to capture the
|
|
// execution state independently of a crash. Returns true on success.
|
|
bool WriteMinidump();
|
|
|
|
// Convenience form of WriteMinidump which does not require an
|
|
// ExceptionHandler instance.
|
|
static bool WriteMinidump(const std::string &dump_path,
|
|
MinidumpCallback callback,
|
|
void *callback_context);
|
|
|
|
// This structure is passed to minidump_writer.h:WriteMinidump via an opaque
|
|
// blob. It shouldn't be needed in any user code.
|
|
struct CrashContext {
|
|
siginfo_t siginfo;
|
|
pid_t tid; // the crashing thread.
|
|
struct ucontext context;
|
|
#if !defined(__ARM_EABI__)
|
|
// #ifdef this out because FP state is not part of user ABI for Linux ARM.
|
|
struct _libc_fpstate float_state;
|
|
#endif
|
|
};
|
|
|
|
// Returns whether out-of-process dump generation is used or not.
|
|
bool IsOutOfProcess() const {
|
|
return crash_generation_client_.get() != NULL;
|
|
}
|
|
|
|
// Add information about a memory mapping. This can be used if
|
|
// a custom library loader is used that maps things in a way
|
|
// that the linux dumper can't handle by reading the maps file.
|
|
void AddMappingInfo(const std::string& name,
|
|
const u_int8_t identifier[sizeof(MDGUID)],
|
|
uintptr_t start_address,
|
|
size_t mapping_size,
|
|
size_t file_offset);
|
|
|
|
private:
|
|
void Init(const std::string &dump_path,
|
|
const int server_fd);
|
|
bool InstallHandlers();
|
|
void UninstallHandlers();
|
|
void PreresolveSymbols();
|
|
bool GenerateDump(CrashContext *context);
|
|
void SendContinueSignalToChild();
|
|
void WaitForContinueSignal();
|
|
|
|
void UpdateNextID();
|
|
static void SignalHandler(int sig, siginfo_t* info, void* uc);
|
|
bool HandleSignal(int sig, siginfo_t* info, void* uc);
|
|
static int ThreadEntry(void* arg);
|
|
bool DoDump(pid_t crashing_process, const void* context,
|
|
size_t context_size);
|
|
|
|
const FilterCallback filter_;
|
|
const MinidumpCallback callback_;
|
|
void* const callback_context_;
|
|
|
|
scoped_ptr<CrashGenerationClient> crash_generation_client_;
|
|
|
|
std::string dump_path_;
|
|
std::string next_minidump_path_;
|
|
std::string next_minidump_id_;
|
|
|
|
// Pointers to C-string representations of the above. These are set
|
|
// when the above are set so we can avoid calling c_str during
|
|
// an exception.
|
|
const char* dump_path_c_;
|
|
const char* next_minidump_path_c_;
|
|
const char* next_minidump_id_c_;
|
|
|
|
const bool handler_installed_;
|
|
void* signal_stack; // the handler stack.
|
|
HandlerCallback crash_handler_;
|
|
|
|
// The global exception handler stack. This is need becuase there may exist
|
|
// multiple ExceptionHandler instances in a process. Each will have itself
|
|
// registered in this stack.
|
|
static std::vector<ExceptionHandler*> *handler_stack_;
|
|
// The index of the handler that should handle the next exception.
|
|
static unsigned handler_stack_index_;
|
|
static pthread_mutex_t handler_stack_mutex_;
|
|
|
|
// A vector of the old signal handlers.
|
|
std::vector<std::pair<int, struct sigaction *> > old_handlers_;
|
|
|
|
// We need to explicitly enable ptrace of parent processes on some
|
|
// kernels, but we need to know the PID of the cloned process before we
|
|
// can do this. We create a pipe which we can use to block the
|
|
// cloned process after creating it, until we have explicitly enabled
|
|
// ptrace. This is used to store the file descriptors for the pipe
|
|
int fdes[2];
|
|
|
|
// Callers can add extra info about mappings for cases where the
|
|
// dumper code cannot extract enough information from /proc/<pid>/maps.
|
|
MappingList mapping_list_;
|
|
};
|
|
|
|
} // namespace google_breakpad
|
|
|
|
#endif // CLIENT_LINUX_HANDLER_EXCEPTION_HANDLER_H_
|