/*
* Copyright ( C ) 2015 The Android Open Source Project
* 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 .
*
* 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 .
*/
#pragma once
#include <stdint.h>
#include <string>
#include <unordered_map>
constexpr uint64_t FRONT_GUARD = 0 x1;
constexpr uint64_t REAR_GUARD = 0 x2;
constexpr uint64_t BACKTRACE = 0 x4;
constexpr uint64_t FILL_ON_ALLOC = 0 x8;
constexpr uint64_t FILL_ON_FREE = 0 x10;
constexpr uint64_t EXPAND_ALLOC = 0 x20;
constexpr uint64_t FREE_TRACK = 0 x40;
constexpr uint64_t TRACK_ALLOCS = 0 x80;
constexpr uint64_t LEAK_TRACK = 0 x100;
constexpr uint64_t RECORD_ALLOCS = 0 x200;
constexpr uint64_t BACKTRACE_FULL = 0 x400;
constexpr uint64_t ABORT_ON_ERROR = 0 x800;
constexpr uint64_t VERBOSE = 0 x1000;
constexpr uint64_t CHECK_UNREACHABLE_ON_SIGNAL = 0 x2000;
constexpr uint64_t BACKTRACE_SPECIFIC_SIZES = 0 x4000;
constexpr uint64_t LOG_ALLOCATOR_STATS_ON_SIGNAL = 0 x8000;
constexpr uint64_t LOG_ALLOCATOR_STATS_ON_EXIT = 0 x10000;
// In order to guarantee posix compliance, set the minimum alignment
// to 8 bytes for 32 bit systems and 16 bytes for 64 bit systems.
#if defined (__LP64__)
constexpr size_t MINIMUM_ALIGNMENT_BYTES = 16 ;
#else
constexpr size_t MINIMUM_ALIGNMENT_BYTES = 8 ;
#endif
// If one or more of these options is set, then a special header is needed.
constexpr uint64_t HEADER_OPTIONS = FRONT_GUARD | REAR_GUARD;
class Config {
public :
bool Init(const char * options_str);
void LogUsage() const ;
uint64_t options() const { return options_; }
int backtrace_signal() const { return backtrace_signal_; }
int backtrace_dump_signal() const { return backtrace_dump_signal_; }
size_t backtrace_frames() const { return backtrace_frames_; }
size_t backtrace_enabled() const { return backtrace_enabled_; }
size_t backtrace_enable_on_signal() const { return backtrace_enable_on_signal_; }
bool backtrace_dump_on_exit() const { return backtrace_dump_on_exit_; }
const std::string& backtrace_dump_prefix() const { return backtrace_dump_prefix_; }
size_t front_guard_bytes() const { return front_guard_bytes_; }
size_t rear_guard_bytes() const { return rear_guard_bytes_; }
uint8_t front_guard_value() const { return front_guard_value_; }
uint8_t rear_guard_value() const { return rear_guard_value_; }
size_t expand_alloc_bytes() const { return expand_alloc_bytes_; }
size_t free_track_allocations() const { return free_track_allocations_; }
size_t free_track_backtrace_num_frames() const { return free_track_backtrace_num_frames_; }
size_t fill_on_alloc_bytes() const { return fill_on_alloc_bytes_; }
size_t fill_on_free_bytes() const { return fill_on_free_bytes_; }
uint8_t fill_alloc_value() const { return fill_alloc_value_; }
uint8_t fill_free_value() const { return fill_free_value_; }
size_t backtrace_min_size_bytes() const { return backtrace_min_size_bytes_; }
size_t backtrace_max_size_bytes() const { return backtrace_max_size_bytes_; }
int record_allocs_signal() const { return record_allocs_signal_; }
size_t record_allocs_num_entries() const { return record_allocs_num_entries_; }
const std::string& record_allocs_file() const { return record_allocs_file_; }
bool record_allocs_on_exit() const { return record_allocs_on_exit_; }
int check_unreachable_signal() const { return check_unreachable_signal_; }
int log_allocator_stats_signal() const { return log_allocator_stats_signal_; }
private :
struct OptionInfo {
uint64_t option;
bool (Config::*process_func)(const std::string&, const std::string&);
};
bool ParseValue(const std::string& option, const std::string& value, size_t default_value,
size_t min_value, size_t max_value, size_t* new_value) const ;
bool ParseValue(const std::string& option, const std::string& value, size_t min_value,
size_t max_value, size_t* parsed_value) const ;
bool SetGuard(const std::string& option, const std::string& value);
bool SetFrontGuard(const std::string& option, const std::string& value);
bool SetRearGuard(const std::string& option, const std::string& value);
bool SetFill(const std::string& option, const std::string& value);
bool SetFillOnAlloc(const std::string& option, const std::string& value);
bool SetFillOnFree(const std::string& option, const std::string& value);
bool SetBacktrace(const std::string& option, const std::string& value);
bool SetBacktraceEnableOnSignal(const std::string& option, const std::string& value);
bool SetBacktraceDumpOnExit(const std::string& option, const std::string& value);
bool SetBacktraceDumpPrefix(const std::string& option, const std::string& value);
bool SetBacktraceSize(const std::string& option, const std::string& value);
bool SetBacktraceMinSize(const std::string& option, const std::string& value);
bool SetBacktraceMaxSize(const std::string& option, const std::string& value);
bool SetExpandAlloc(const std::string& option, const std::string& value);
bool SetFreeTrack(const std::string& option, const std::string& value);
bool SetFreeTrackBacktraceNumFrames(const std::string& option, const std::string& value);
bool SetRecordAllocs(const std::string& option, const std::string& value);
bool SetRecordAllocsFile(const std::string& option, const std::string& value);
bool SetRecordAllocsOnExit(const std::string& option, const std::string& value);
bool VerifyValueEmpty(const std::string& option, const std::string& value);
static bool GetOption(const char ** option_str, std::string* option, std::string* value);
const static std::unordered_map<std::string, OptionInfo> kOptions;
size_t front_guard_bytes_ = 0 ;
size_t rear_guard_bytes_ = 0 ;
bool backtrace_enable_on_signal_ = false ;
int backtrace_signal_ = 0 ;
int backtrace_dump_signal_ = 0 ;
bool backtrace_enabled_ = false ;
size_t backtrace_frames_ = 0 ;
bool backtrace_dump_on_exit_ = false ;
std::string backtrace_dump_prefix_;
size_t backtrace_min_size_bytes_ = 0 ;
size_t backtrace_max_size_bytes_ = 0 ;
size_t fill_on_alloc_bytes_ = 0 ;
size_t fill_on_free_bytes_ = 0 ;
size_t expand_alloc_bytes_ = 0 ;
size_t free_track_allocations_ = 0 ;
size_t free_track_backtrace_num_frames_ = 0 ;
int record_allocs_signal_ = 0 ;
size_t record_allocs_num_entries_ = 0 ;
std::string record_allocs_file_;
bool record_allocs_on_exit_ = false ;
uint64_t options_ = 0 ;
uint8_t fill_alloc_value_;
uint8_t fill_free_value_;
uint8_t front_guard_value_;
uint8_t rear_guard_value_;
int check_unreachable_signal_ = 0 ;
int log_allocator_stats_signal_ = 0 ;
};
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(vorverarbeitet am 2026-06-28)
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