diff options
Diffstat (limited to 'src/debug/nvwa')
| -rw-r--r-- | src/debug/nvwa/_nvwa.h | 112 | ||||
| -rw-r--r-- | src/debug/nvwa/c++11.h | 340 | ||||
| -rw-r--r-- | src/debug/nvwa/debug_new.cpp | 1197 | ||||
| -rw-r--r-- | src/debug/nvwa/debug_new.h | 207 | ||||
| -rw-r--r-- | src/debug/nvwa/fast_mutex.h | 427 | ||||
| -rw-r--r-- | src/debug/nvwa/static_assert.h | 62 |
6 files changed, 2345 insertions, 0 deletions
diff --git a/src/debug/nvwa/_nvwa.h b/src/debug/nvwa/_nvwa.h new file mode 100644 index 000000000..096893c59 --- /dev/null +++ b/src/debug/nvwa/_nvwa.h @@ -0,0 +1,112 @@ +// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- +// vim:tabstop=4:shiftwidth=4:expandtab: + +/* + * Copyright (C) 2013-2015 Wu Yongwei <adah at users dot sourceforge dot net> + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any + * damages arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute + * it freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must + * not claim that you wrote the original software. If you use this + * software in a product, an acknowledgement in the product + * documentation would be appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must + * not be misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source + * distribution. + * + * This file is part of Stones of Nvwa: + * http://sourceforge.net/projects/nvwa + * + */ + +/** + * @file _nvwa.h + * + * Common definitions for preprocessing. + * + * @date 2015-10-28 + */ + +#ifndef NVWA_NVWA_H +#define NVWA_NVWA_H + +/** + * @namespace nvwa + * Namespace of the nvwa project. Most functions and global variables + * are defined in this namespace. + */ + +#ifndef NVWA_USE_NAMESPACE +#ifdef __cplusplus +#define NVWA_USE_NAMESPACE 1 +#else +#define NVWA_USE_NAMESPACE 0 +#endif // __cplusplus +#endif // NVWA_USE_NAMESPACE + +#if NVWA_USE_NAMESPACE +#define NVWA_NAMESPACE_BEGIN namespace nvwa { +#define NVWA_NAMESPACE_END } +#define NVWA nvwa +#else // NVWA_USE_NAMESPACE +#define NVWA_NAMESPACE_BEGIN +#define NVWA_NAMESPACE_END +#define NVWA +#endif // NVWA_USE_NAMESPACE + +#ifndef NVWA_APPLE +#if defined(__APPLE__) && defined(__MACH__) +#define NVWA_APPLE 1 +#else +#define NVWA_APPLE 0 +#endif +#endif // NVWA_APPLE + +#ifndef NVWA_CYGWIN +#if defined(__CYGWIN__) +#define NVWA_CYGWIN 1 +#else +#define NVWA_CYGWIN 0 +#endif +#endif // NVWA_CYGWIN + +#ifndef NVWA_LINUX +#if defined(__linux__) || defined(__linux) +#define NVWA_LINUX 1 +#else +#define NVWA_LINUX 0 +#endif +#endif // NVWA_LINUX + +#ifndef NVWA_UNIX +#if defined(__unix__) || defined(__unix) || NVWA_APPLE +#define NVWA_UNIX 1 +#else +#define NVWA_UNIX 0 +#endif +#endif // NVWA_UNIX + +#ifndef NVWA_WIN32 +#if defined(_WIN32) +#define NVWA_WIN32 1 +#else +#define NVWA_WIN32 0 +#endif +#endif // NVWA_WIN32 + +#ifndef NVWA_WINDOWS +#if NVWA_CYGWIN || NVWA_WIN32 +#define NVWA_WINDOWS 1 +#else +#define NVWA_WINDOWS 0 +#endif +#endif // NVWA_WINDOWS + +#endif // NVWA_NVWA_H diff --git a/src/debug/nvwa/c++11.h b/src/debug/nvwa/c++11.h new file mode 100644 index 000000000..8d8e2d8af --- /dev/null +++ b/src/debug/nvwa/c++11.h @@ -0,0 +1,340 @@ +// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- +// vim:tabstop=4:shiftwidth=4:expandtab: + +/* + * Copyright (C) 2013-2017 Wu Yongwei <adah at users dot sourceforge dot net> + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any + * damages arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute + * it freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must + * not claim that you wrote the original software. If you use this + * software in a product, an acknowledgement in the product + * documentation would be appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must + * not be misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source + * distribution. + * + * This file is part of Stones of Nvwa: + * http://sourceforge.net/projects/nvwa + * + */ + +/** + * @file c++11.h + * + * C++11 feature detection macros and workarounds. + * + * @date 2017-04-03 + */ + +#ifndef NVWA_CXX11_H +#define NVWA_CXX11_H + +// Only Clang provides these macros; they need to be defined as follows +// to get a valid expression in preprocessing by other compilers. +#ifndef __has_extension +#define __has_extension(x) 0 +#endif +#ifndef __has_feature +#define __has_feature(x) 0 +#endif +#ifndef __has_include +#define __has_include(x) 0 +#endif + +// Detect whether C++11 mode is on (for GCC and Clang). MSVC does not +// have a special C++11 mode, so it is always on for Visual C++ 2010 and +// later. +#if __cplusplus >= 201103L || \ + defined(__GXX_EXPERIMENTAL_CXX0X__) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) +#define NVWA_CXX11_MODE 1 +#else +#define NVWA_CXX11_MODE 0 +#endif + + +/* Feature checks */ + +#if !defined(HAVE_CXX11_ATOMIC) +#if NVWA_CXX11_MODE && \ + ((__has_include(<atomic>) && !defined(__MINGW32__)) || \ + (defined(_MSC_VER) && _MSC_VER >= 1700) || \ + (((defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 405) || \ + defined(__clang__)) && \ + (!defined(__MINGW32__) || defined(_POSIX_THREADS)))) +// Note: MinGW GCC, unless built with POSIX threads (as in +// MinGW-builds), does not support atomics as of 4.8. +#define HAVE_CXX11_ATOMIC 1 +#else +#define HAVE_CXX11_ATOMIC 0 +#endif +#endif + +#if !defined(HAVE_CXX11_AUTO_TYPE) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_auto_type) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 404)) +#define HAVE_CXX11_AUTO_TYPE 1 +#else +#define HAVE_CXX11_AUTO_TYPE 0 +#endif +#endif + +#if !defined(HAVE_CXX11_DELETED_FUNCTION) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_deleted_functions) || \ + (defined(_MSC_VER) && _MSC_VER >= 1800) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 404)) +#define HAVE_CXX11_DELETED_FUNCTION 1 +#else +#define HAVE_CXX11_DELETED_FUNCTION 0 +#endif +#endif + +#if !defined(HAVE_CXX11_EXPLICIT_CONVERSION) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_explicit_conversions) || \ + (defined(_MSC_VER) && _MSC_VER >= 1900) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 405)) +#define HAVE_CXX11_EXPLICIT_CONVERSION 1 +#else +#define HAVE_CXX11_EXPLICIT_CONVERSION 0 +#endif +#endif + +#if !defined(HAVE_CXX11_FINAL) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_override_control) || \ + (defined(_MSC_VER) && _MSC_VER >= 1700) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 407)) +#define HAVE_CXX11_FINAL 1 +#else +#define HAVE_CXX11_FINAL 0 +#endif +#endif + +#if !defined(HAVE_CXX11_FUTURE) +#if NVWA_CXX11_MODE && \ + ((__has_include(<future>) && !defined(__MINGW32__)) || \ + (defined(_MSC_VER) && _MSC_VER >= 1700) || \ + (((defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 405) || \ + defined(__clang__)) && \ + (!defined(__MINGW32__) || defined(_POSIX_THREADS)))) +// Note: MinGW GCC, unless built with POSIX threads (as in +// MinGW-builds), does not support futures as of 4.8. +#define HAVE_CXX11_FUTURE 1 +#else +#define HAVE_CXX11_FUTURE 0 +#endif +#endif + +#if !defined(HAVE_CXX11_GENERALIZED_INITIALIZER) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_generalized_initializers) || \ + (defined(_MSC_VER) && _MSC_VER >= 1800) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 404)) +#define HAVE_CXX11_GENERALIZED_INITIALIZER 1 +#else +#define HAVE_CXX11_GENERALIZED_INITIALIZER 0 +#endif +#endif + +#if !defined(HAVE_CXX11_LAMBDA) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_lambdas) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 405)) +#define HAVE_CXX11_LAMBDA 1 +#else +#define HAVE_CXX11_LAMBDA 0 +#endif +#endif + +#if !defined(HAVE_CXX11_MUTEX) +#if NVWA_CXX11_MODE && \ + ((__has_include(<mutex>) && !defined(__MINGW32__)) || \ + (defined(_MSC_VER) && _MSC_VER >= 1700) || \ + (((defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 403) || \ + defined(__clang__)) && \ + (!defined(__MINGW32__) || defined(_POSIX_THREADS)))) +// Note: MinGW GCC, unless built with POSIX threads (as in +// MinGW-builds), does not support std::mutex as of 4.8. +#define HAVE_CXX11_MUTEX 1 +#else +#define HAVE_CXX11_MUTEX 0 +#endif +#endif + +#if !defined(HAVE_CXX11_NOEXCEPT) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_noexcept) || \ + (defined(_MSC_VER) && _MSC_VER >= 1900) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 406)) +#define HAVE_CXX11_NOEXCEPT 1 +#else +#define HAVE_CXX11_NOEXCEPT 0 +#endif +#endif + +#if !defined(HAVE_CXX11_NULLPTR) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_nullptr) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 406)) +#define HAVE_CXX11_NULLPTR 1 +#else +#define HAVE_CXX11_NULLPTR 0 +#endif +#endif + +#if !defined(HAVE_CXX11_OVERRIDE) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_override_control) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 407)) +#define HAVE_CXX11_OVERRIDE 1 +#else +#define HAVE_CXX11_OVERRIDE 0 +#endif +#endif + +#if !defined(HAVE_CXX11_RANGE_FOR) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_range_for) || \ + (defined(_MSC_VER) && _MSC_VER >= 1700) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 406)) +#define HAVE_CXX11_RANGE_FOR 1 +#else +#define HAVE_CXX11_RANGE_FOR 0 +#endif +#endif + +#if !defined(HAVE_CXX11_RVALUE_REFERENCE) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_rvalue_references) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 405)) +#define HAVE_CXX11_RVALUE_REFERENCE 1 +#else +#define HAVE_CXX11_RVALUE_REFERENCE 0 +#endif +#endif + +#if !defined(HAVE_CXX11_STATIC_ASSERT) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_static_assert) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 403)) +#define HAVE_CXX11_STATIC_ASSERT 1 +#else +#define HAVE_CXX11_STATIC_ASSERT 0 +#endif +#endif + +#if !defined(HAVE_CXX11_THREAD) +#if NVWA_CXX11_MODE && \ + ((__has_include(<thread>) && !defined(__MINGW32__)) || \ + (defined(_MSC_VER) && _MSC_VER >= 1700) || \ + (((defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 404) || \ + defined(__clang__)) && \ + (!defined(__MINGW32__) || defined(_POSIX_THREADS)))) +// Note: MinGW GCC, unless built with POSIX threads (as in +// MinGW-builds), does not support std::thread as of 4.8. +#define HAVE_CXX11_THREAD 1 +#else +#define HAVE_CXX11_THREAD 0 +#endif +#endif + +#if !defined(HAVE_CXX11_THREAD_LOCAL) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_thread_local) || \ + (defined(_MSC_VER) && _MSC_VER >= 1900) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 408)) +#define HAVE_CXX11_THREAD_LOCAL 1 +#else +#define HAVE_CXX11_THREAD_LOCAL 0 +#endif +#endif + +#if !defined(HAVE_CXX11_TYPE_TRAITS) +#if NVWA_CXX11_MODE && \ + (__has_include(<type_traits>) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 403)) +#define HAVE_CXX11_TYPE_TRAITS 1 +#else +#define HAVE_CXX11_TYPE_TRAITS 0 +#endif +#endif + +#if !defined(HAVE_CXX11_UNICODE_LITERAL) +#if NVWA_CXX11_MODE && \ + (__has_feature(cxx_unicode_literals) || \ + (defined(_MSC_VER) && _MSC_VER >= 1900) || \ + (defined(__GNUC__) && __GNUC__ * 100 + __GNUC_MINOR__ >= 405)) +#define HAVE_CXX11_UNICODE_LITERAL 1 +#else +#define HAVE_CXX11_UNICODE_LITERAL 0 +#endif +#endif + + +/* Workarounds */ + +#if HAVE_CXX11_DELETED_FUNCTION +#define _DELETED = delete +#else +#define _DELETED +#endif + +#if HAVE_CXX11_FINAL +#define _FINAL final +#else +#define _FINAL +#endif + +#if HAVE_CXX11_OVERRIDE +#define _OVERRIDE override +#else +#define _OVERRIDE +#endif + +#if HAVE_CXX11_NOEXCEPT +#define _NOEXCEPT noexcept +#define _NOEXCEPT_(x) noexcept(x) +#else +#ifdef _MSC_VER +#define _NOEXCEPT throw () +#else +#define _NOEXCEPT throw() +#endif +#define _NOEXCEPT_(x) +#endif + +#if HAVE_CXX11_NULLPTR +#define _NULLPTR nullptr +#else +#define _NULLPTR NULL +#endif + +#if HAVE_CXX11_THREAD_LOCAL +#define _THREAD_LOCAL thread_local +#else +#ifdef _MSC_VER +#define _THREAD_LOCAL __declspec(thread) +#else +#define _THREAD_LOCAL __thread +#endif +#endif + +#endif // NVWA_CXX11_H diff --git a/src/debug/nvwa/debug_new.cpp b/src/debug/nvwa/debug_new.cpp new file mode 100644 index 000000000..1a59353a3 --- /dev/null +++ b/src/debug/nvwa/debug_new.cpp @@ -0,0 +1,1197 @@ +// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- +// vim:tabstop=4:shiftwidth=4:expandtab: + +/* + * Copyright (C) 2004-2016 Wu Yongwei <adah at users dot sourceforge dot net> + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any + * damages arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute + * it freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must + * not claim that you wrote the original software. If you use this + * software in a product, an acknowledgement in the product + * documentation would be appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must + * not be misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source + * distribution. + * + * This file is part of Stones of Nvwa: + * http://sourceforge.net/projects/nvwa + * + */ + +/** + * @file debug_new.cpp + * + * Implementation of debug versions of new and delete to check leakage. + * + * @date 2016-10-14 + */ + +#include "localconsts.h" + +PRAGMACLANG6GCC(GCC diagnostic push) +PRAGMACLANG6GCC(GCC diagnostic ignored "-Wold-style-cast") + +PRAGMA45(GCC diagnostic push) +PRAGMA45(GCC diagnostic ignored "-Wcast-qual") + +#include <new> // std::bad_alloc/nothrow_t +#include <assert.h> // assert +#include <stdio.h> // fprintf/stderr +#include <stdlib.h> // abort +#include <string.h> // strcpy/strncpy/sprintf +#include "debug/_nvwa.h" // NVWA macros + +#if NVWA_UNIX +#include <alloca.h> // alloca +#endif +#if NVWA_WIN32 +#include <malloc.h> // alloca +#endif + +#if NVWA_LINUX || NVWA_APPLE +#include <execinfo.h> // backtrace +#endif + +#if NVWA_WINDOWS +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#include <windows.h> // CaptureStackBackTrace +#endif + +#include "debug/c++11.h" // _NOEXCEPT/_NULLPTR +#include "debug/fast_mutex.h" // nvwa::fast_mutex +#include "debug/static_assert.h" // STATIC_ASSERT + +#undef _DEBUG_NEW_EMULATE_MALLOC +#undef _DEBUG_NEW_REDEFINE_NEW +/** + * Macro to indicate whether redefinition of \c new is wanted. Here it + * is defined to \c 0 to disable the redefinition of \c new. + */ +#define _DEBUG_NEW_REDEFINE_NEW 0 +#include "debug/nvwa/debug_new.h" + +#if !_FAST_MUTEX_CHECK_INITIALIZATION && !defined(_NOTHREADS) +#error "_FAST_MUTEX_CHECK_INITIALIZATION not set: check_leaks may not work" +#endif + +/** + * @def _DEBUG_NEW_ALIGNMENT + * + * The alignment requirement of allocated memory blocks. It must be a + * power of two. + */ +#ifndef _DEBUG_NEW_ALIGNMENT +#define _DEBUG_NEW_ALIGNMENT 16 +#endif + +/** + * @def _DEBUG_NEW_CALLER_ADDRESS + * + * The expression to return the caller address. nvwa#print_position will + * later on use this address to print the position information of memory + * operation points. + */ +#ifndef _DEBUG_NEW_CALLER_ADDRESS +#ifdef __GNUC__ +#define _DEBUG_NEW_CALLER_ADDRESS __builtin_return_address(0) +#else +#define _DEBUG_NEW_CALLER_ADDRESS _NULLPTR +#endif +#endif + +/** + * @def _DEBUG_NEW_ERROR_ACTION + * + * The action to take when an error occurs. The default behaviour is to + * call \e abort, unless \c _DEBUG_NEW_ERROR_CRASH is defined, in which + * case a segmentation fault will be triggered instead (which can be + * useful on platforms like Windows that do not generate a core dump + * when \e abort is called). + */ +#ifndef _DEBUG_NEW_ERROR_ACTION +#ifndef _DEBUG_NEW_ERROR_CRASH +#define _DEBUG_NEW_ERROR_ACTION abort() +#else +#define _DEBUG_NEW_ERROR_ACTION do { *((char*)0) = 0; abort(); } while (0) +#endif +#endif + +/** + * @def _DEBUG_NEW_FILENAME_LEN + * + * The length of file name stored if greater than zero. If it is zero, + * only a const char pointer will be stored. Currently the default + * value is non-zero (thus to copy the file name) on non-Windows + * platforms, because I once found that the exit leakage check could not + * access the address of the file name on Linux (in my case, a core dump + * occurred when check_leaks tried to access the file name in a shared + * library after a \c SIGINT). This value makes the size of + * new_ptr_list_t \c 64 on non-Windows 32-bit platforms (w/o stack + * backtrace). + */ +#ifndef _DEBUG_NEW_FILENAME_LEN +#if NVWA_WINDOWS +#define _DEBUG_NEW_FILENAME_LEN 0 +#else +#define _DEBUG_NEW_FILENAME_LEN 44 +#endif +#endif + +/** + * @def _DEBUG_NEW_PROGNAME + * + * The program (executable) name to be set at compile time. It is + * better to assign the full program path to nvwa#new_progname in \e main + * (at run time) than to use this (compile-time) macro, but this macro + * serves well as a quick hack. Note also that double quotation marks + * need to be used around the program name, i.e., one should specify a + * command-line option like <code>-D_DEBUG_NEW_PROGNAME=\\"a.out\"</code> + * in \e bash, or <code>-D_DEBUG_NEW_PROGNAME=\\"a.exe\"</code> in the + * Windows command prompt. + */ +#ifndef _DEBUG_NEW_PROGNAME +#define _DEBUG_NEW_PROGNAME _NULLPTR +#endif + +/** + * @def _DEBUG_NEW_REMEMBER_STACK_TRACE + * + * Macro to indicate whether stack traces of allocations should be + * included in NVWA allocation information and be printed while leaks + * are reported. Useful to pinpoint leaks caused by strdup and other + * custom allocation functions. It is also very helpful in filtering + * out false positives caused by internal STL/C runtime operations. It + * is off by default because it is quite memory heavy. Set it to \c 1 + * to make all allocations have stack trace attached, or set to \c 2 to + * make only allocations that lack calling source code information (file + * and line) have the stack trace attached. + */ +#ifndef _DEBUG_NEW_REMEMBER_STACK_TRACE +#define _DEBUG_NEW_REMEMBER_STACK_TRACE 0 +#endif + +/** + * @def _DEBUG_NEW_STD_OPER_NEW + * + * Macro to indicate whether the standard-conformant behaviour of + * <code>operator new</code> is wanted. It is on by default now, but + * the user may set it to \c 0 to revert to the old behaviour. + */ +#ifndef _DEBUG_NEW_STD_OPER_NEW +#define _DEBUG_NEW_STD_OPER_NEW 1 +#endif + +/** + * @def _DEBUG_NEW_TAILCHECK + * + * Macro to indicate whether a writing-past-end check will be performed. + * Define it to a positive integer as the number of padding bytes at the + * end of a memory block for checking. + */ +#ifndef _DEBUG_NEW_TAILCHECK +#define _DEBUG_NEW_TAILCHECK 0 +#endif + +/** + * @def _DEBUG_NEW_TAILCHECK_CHAR + * + * Value of the padding bytes at the end of a memory block. + */ +//#ifndef _DEBUG_NEW_TAILCHECK_CHAR +//#define _DEBUG_NEW_TAILCHECK_CHAR 0xCC +//#endif + +/** + * @def _DEBUG_NEW_USE_ADDR2LINE + * + * Whether to use \e addr2line to convert a caller address to file/line + * information. Defining it to a non-zero value will enable the + * conversion (automatically done if GCC is detected). Defining it to + * zero will disable the conversion. + */ +#ifndef _DEBUG_NEW_USE_ADDR2LINE +#ifdef __GNUC__ +#define _DEBUG_NEW_USE_ADDR2LINE 1 +#else +#define _DEBUG_NEW_USE_ADDR2LINE 0 +#endif +#endif + +#ifdef _MSC_VER +#pragma warning(disable: 4074) // #pragma init_seg(compiler) used +#pragma warning(disable: 4290) // C++ exception specification ignored +#if _MSC_VER >= 1400 // Visual Studio 2005 or later +#pragma warning(disable: 4996) // Use the `unsafe' strncpy +#endif +#pragma init_seg(compiler) +#endif + +/** + * Gets the aligned value of memory block size. + */ +#define ALIGN(s) \ + (((s) + _DEBUG_NEW_ALIGNMENT - 1) & ~(_DEBUG_NEW_ALIGNMENT - 1)) + +NVWA_NAMESPACE_BEGIN + +/** + * The platform memory alignment. The current value works well in + * platforms I have tested: Windows XP, Windows 7 x64, and Mac OS X + * Leopard. It may be smaller than the real alignment, but must be + * bigger than \c sizeof(size_t) for it work. nvwa#debug_new_recorder + * uses it to detect misaligned pointer returned by `<code>new + * NonPODType[size]</code>'. + */ +const size_t PLATFORM_MEM_ALIGNMENT = sizeof(size_t) * 2; + +/** + * Structure to store the position information where \c new occurs. + */ +struct new_ptr_list_t +{ + new_ptr_list_t* next; ///< Pointer to the next memory block + new_ptr_list_t* prev; ///< Pointer to the previous memory block + size_t size; ///< Size of the memory block + union + { +#if _DEBUG_NEW_FILENAME_LEN == 0 + const char* file; ///< Pointer to the file name of the caller +#else + char file[_DEBUG_NEW_FILENAME_LEN]; ///< File name of the caller +#endif + void* addr; ///< Address of the caller to \e new + }; + unsigned line :31; ///< Line number of the caller; or \c 0 + unsigned is_array:1; ///< Non-zero iff <em>new[]</em> is used +#if _DEBUG_NEW_REMEMBER_STACK_TRACE + void** stacktrace; ///< Pointer to stack trace information +#endif + unsigned magic; ///< Magic number for error detection +}; + +/** + * Definition of the constant magic number used for error detection. + */ +static const unsigned DEBUG_NEW_MAGIC = 0x4442474E; + +/** + * The extra memory allocated by <code>operator new</code>. + */ +static const int ALIGNED_LIST_ITEM_SIZE = ALIGN(sizeof(new_ptr_list_t)); + +/** + * List of all new'd pointers. + */ +static new_ptr_list_t new_ptr_list = { + &new_ptr_list, + &new_ptr_list, + 0, + { +#if _DEBUG_NEW_FILENAME_LEN == 0 + _NULLPTR +#else + "" +#endif + }, + 0, + 0, +#if _DEBUG_NEW_REMEMBER_STACK_TRACE + _NULLPTR, +#endif + DEBUG_NEW_MAGIC +}; + +/** + * The mutex guard to protect simultaneous access to the pointer list. + */ +static fast_mutex new_ptr_lock; + +/** + * The mutex guard to protect simultaneous output to #new_output_fp. + */ +static fast_mutex new_output_lock; + +/** + * Total memory allocated in bytes. + */ +static size_t total_mem_alloc = 0; + +/** + * Flag to control whether nvwa#check_leaks will be automatically called + * on program exit. + */ +bool new_autocheck_flag = true; + +/** + * Flag to control whether verbose messages are output. + */ +bool new_verbose_flag = false; + +/** + * Pointer to the output stream. The default output is \e stderr, and + * one may change it to a user stream if needed (say, #new_verbose_flag + * is \c true and there are a lot of (de)allocations). + */ +FILE* new_output_fp = stderr; + +/** + * Pointer to the program name. Its initial value is the macro + * #_DEBUG_NEW_PROGNAME. You should try to assign the program path to + * it early in your application. Assigning <code>argv[0]</code> to it + * in \e main is one way. If you use \e bash or \e ksh (or similar), + * the following statement is probably what you want: + * `<code>new_progname = getenv("_");</code>'. + */ +const char* new_progname = _DEBUG_NEW_PROGNAME; + +/** + * Pointer to the callback used to print the stack backtrace in case of + * a memory problem. A null value causes the default stack trace + * printing routine to be used. + */ +stacktrace_print_callback_t stacktrace_print_callback = _NULLPTR; + +/** + * Pointer to the callback used to filter out false positives from leak + * reports. A null value means the lack of filtering. + */ +leak_whitelist_callback_t leak_whitelist_callback = _NULLPTR; + +#if _DEBUG_NEW_USE_ADDR2LINE +/** + * Tries printing the position information from an instruction address. + * This is the version that uses \e addr2line. + * + * @param addr the instruction address to convert and print + * @return \c true if the address is converted successfully (and + * the result is printed); \c false if no useful + * information is got (and nothing is printed) + */ +static bool print_position_from_addr(const void* addr) +{ + static const void* last_addr = _NULLPTR; + static char last_info[256] = ""; + if (addr == last_addr) + { + if (last_info[0] == '\0') + return false; + fprintf(new_output_fp, "%s", last_info); + return true; + } + if (new_progname) + { +#if NVWA_APPLE + const char addr2line_cmd[] = "atos -o "; +#else + const char addr2line_cmd[] = "addr2line -e "; +#endif + +#if NVWA_WINDOWS + const int exeext_len = 4; +#else + const int exeext_len = 0; +#endif + +#if NVWA_UNIX && !NVWA_CYGWIN + const char ignore_err[] = " 2>/dev/null"; +#elif NVWA_CYGWIN || \ + (NVWA_WIN32 && defined(WINVER) && WINVER >= 0x0500) + const char ignore_err[] = " 2>nul"; +#else + const char ignore_err[] = ""; +#endif + char* cmd = (char*)alloca(strlen(new_progname) + + exeext_len + + sizeof addr2line_cmd - 1 + + sizeof ignore_err - 1 + + sizeof(void*) * 2 + + 4 /* SP + "0x" + null */); + strcpy(cmd, addr2line_cmd); + strcpy(cmd + sizeof addr2line_cmd - 1, new_progname); + size_t len = strlen(cmd); +#if NVWA_WINDOWS + if (len <= 4 + || (strcmp(cmd + len - 4, ".exe") != 0 && + strcmp(cmd + len - 4, ".EXE") != 0)) + { + strcpy(cmd + len, ".exe"); + len += 4; + } +#endif + sprintf(cmd + len, " %p%s", addr, ignore_err); + FILE* fp = popen(cmd, "r"); + if (fp) + { + char buffer[sizeof last_info] = ""; + len = 0; + if (fgets(buffer, sizeof buffer, fp)) + { + len = strlen(buffer); + if (buffer[len - 1] == '\n') + buffer[--len] = '\0'; + } + int res = pclose(fp); + // Display the file/line information only if the command + // is executed successfully and the output points to a + // valid position, but the result will be cached if only + // the command is executed successfully. + if (res == 0 && len > 0) + { + last_addr = addr; + if (buffer[len - 1] == '0' && buffer[len - 2] == ':') + last_info[0] = '\0'; + else + { + fprintf(new_output_fp, "%s", buffer); + strcpy(last_info, buffer); + return true; + } + } + } + } + return false; +} +#else +/** + * Tries printing the position information from an instruction address. + * This is the stub version that does nothing at all. + * + * @return \c false always + */ +static bool print_position_from_addr(const void*) +{ + return false; +} +#endif // _DEBUG_NEW_USE_ADDR2LINE + +/** + * Prints the position information of a memory operation point. When \c + * _DEBUG_NEW_USE_ADDR2LINE is defined to a non-zero value, this + * function will try to convert a given caller address to file/line + * information with \e addr2line. + * + * @param ptr source file name if \e line is non-zero; caller address + * otherwise + * @param line source line number if non-zero; indication that \e ptr + * is the caller address otherwise + */ +static void print_position(const void* ptr, int line) +{ + if (line != 0) // Is file/line information present? + { + fprintf(new_output_fp, "%s:%d", (const char*)ptr, line); + } + else if (ptr != _NULLPTR) // Is caller address present? + { + if (!print_position_from_addr(ptr)) // Fail to get source position? + fprintf(new_output_fp, "%p", ptr); + } + else // No information is present + { + fprintf(new_output_fp, "<Unknown>"); + } +} + +#if _DEBUG_NEW_REMEMBER_STACK_TRACE +/** + * Prints the stack backtrace. + * + * When nvwa#stacktrace_print_callback is not null, it is used for + * printing the stacktrace items. Default implementation of call stack + * printing is very spartan—only stack frame pointers are + * printed—but even that output is still useful. Just do address + * lookup in LLDB etc. + * + * @param stacktrace pointer to the stack trace array + */ +static void print_stacktrace(void** stacktrace) +{ + if (stacktrace_print_callback == _NULLPTR) + { + fprintf(new_output_fp, "Stack backtrace:\n"); + for (size_t i = 0; stacktrace[i] != _NULLPTR; ++i) + fprintf(new_output_fp, "%p\n", stacktrace[i]); + } + else + { + stacktrace_print_callback(new_output_fp, stacktrace); + } +} +#endif + +/** + * Checks whether a leak should be ignored. Its runtime performance + * depends on the callback nvwa#leak_whitelist_callback. + * + * @param ptr pointer to a new_ptr_list_t struct + * @return \c true if the leak should be whitelisted; \c false + * otherwise + */ +static bool is_leak_whitelisted(new_ptr_list_t* ptr) +{ + if (leak_whitelist_callback == _NULLPTR) + return false; + + char const* file = ptr->line != 0 ? ptr->file : _NULLPTR; + int line = ptr->line; + void* addr = ptr->line == 0 ? ptr->addr : _NULLPTR; +#if _DEBUG_NEW_REMEMBER_STACK_TRACE + void** stacktrace = ptr->stacktrace; +#else + void** stacktrace = _NULLPTR; +#endif + + return leak_whitelist_callback(file, line, addr, stacktrace); +} + +#if _DEBUG_NEW_TAILCHECK +/** + * Checks whether the padding bytes at the end of a memory block is + * tampered with. + * + * @param ptr pointer to a new_ptr_list_t struct + * @return \c true if the padding bytes are untouched; \c false + * otherwise + */ +static bool check_tail(new_ptr_list_t* ptr) +{ + const unsigned char* const tail_ptr = (unsigned char*)ptr + + ALIGNED_LIST_ITEM_SIZE + ptr->size; + for (int i = 0; i < _DEBUG_NEW_TAILCHECK; ++i) + if (tail_ptr[i] != _DEBUG_NEW_TAILCHECK_CHAR) + return false; + return true; +} +#endif + +/** + * Allocates memory and initializes control data. + * + * @param size size of the required memory block + * @param file null-terminated string of the file name + * @param line line number + * @param is_array boolean value whether this is an array operation + * @return pointer to the user-requested memory area; null if + * memory allocation is not successful + */ +static void* alloc_mem(size_t size, const char* file, int line, bool is_array) +{ + assert(line >= 0); +#if _DEBUG_NEW_TYPE == 1 + STATIC_ASSERT(_DEBUG_NEW_ALIGNMENT >= PLATFORM_MEM_ALIGNMENT, + Alignment_too_small); +#endif + STATIC_ASSERT((_DEBUG_NEW_ALIGNMENT & (_DEBUG_NEW_ALIGNMENT - 1)) == 0, + Alignment_must_be_power_of_two); + STATIC_ASSERT(_DEBUG_NEW_TAILCHECK >= 0, Invalid_tail_check_length); + size_t s = size + ALIGNED_LIST_ITEM_SIZE + _DEBUG_NEW_TAILCHECK; + new_ptr_list_t* ptr = (new_ptr_list_t*)malloc(s); + if (ptr == _NULLPTR) + { +#if _DEBUG_NEW_STD_OPER_NEW + return _NULLPTR; +#else + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "Out of memory when allocating %lu bytes\n", + (unsigned long)size); + fflush(new_output_fp); + _DEBUG_NEW_ERROR_ACTION; +#endif + } + void* usr_ptr = (char*)ptr + ALIGNED_LIST_ITEM_SIZE; +#if _DEBUG_NEW_FILENAME_LEN == 0 + ptr->file = file; +#else + if (line) + strncpy(ptr->file, file, _DEBUG_NEW_FILENAME_LEN - 1) + [_DEBUG_NEW_FILENAME_LEN - 1] = '\0'; + else + ptr->addr = (void*)file; +#endif + ptr->line = line; +#if _DEBUG_NEW_REMEMBER_STACK_TRACE + ptr->stacktrace = _NULLPTR; + +#if _DEBUG_NEW_REMEMBER_STACK_TRACE == 2 + if (line == 0) +#endif + { + void* buffer [255]; + size_t buffer_length = sizeof(buffer) / sizeof(*buffer); + +#if NVWA_UNIX + int stacktrace_length = backtrace(buffer, int(buffer_length)); +#endif + +#if NVWA_WINDOWS + USHORT stacktrace_length = CaptureStackBackTrace( + 0, DWORD(buffer_length), buffer, _NULLPTR); +#endif + + size_t stacktrace_size = stacktrace_length * sizeof(void*); + ptr->stacktrace = (void**)malloc(stacktrace_size + sizeof(void*)); + + if (ptr->stacktrace != _NULLPTR) + { + memcpy(ptr->stacktrace, buffer, stacktrace_size); + ptr->stacktrace[stacktrace_length] = _NULLPTR; + } + } +#endif + ptr->is_array = is_array; + ptr->size = size; + ptr->magic = DEBUG_NEW_MAGIC; + { + fast_mutex_autolock lock(new_ptr_lock); + ptr->prev = new_ptr_list.prev; + ptr->next = &new_ptr_list; + new_ptr_list.prev->next = ptr; + new_ptr_list.prev = ptr; + } +#if _DEBUG_NEW_TAILCHECK + memset((char*)usr_ptr + size, _DEBUG_NEW_TAILCHECK_CHAR, + _DEBUG_NEW_TAILCHECK); +#endif + if (new_verbose_flag) + { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "new%s: allocated %p (size %lu, ", + is_array ? "[]" : "", + usr_ptr, (unsigned long)size); + if (line != 0) + print_position(ptr->file, ptr->line); + else + print_position(ptr->addr, ptr->line); + fprintf(new_output_fp, ")\n"); + } + total_mem_alloc += size; + return usr_ptr; +} + +/** + * Frees memory and adjusts pointers. + * + * @param usr_ptr pointer to the previously allocated memory + * @param addr pointer to the caller + * @param is_array flag indicating whether it is invoked by a + * <code>delete[]</code> call + */ +static void free_pointer(void* usr_ptr, void* addr, bool is_array) +{ + if (usr_ptr == _NULLPTR) + return; + new_ptr_list_t* ptr = + (new_ptr_list_t*)((char*)usr_ptr - ALIGNED_LIST_ITEM_SIZE); + if (ptr->magic != DEBUG_NEW_MAGIC) + { + { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, "delete%s: invalid pointer %p (", + is_array ? "[]" : "", usr_ptr); + print_position(addr, 0); + fprintf(new_output_fp, ")\n"); + } + check_mem_corruption(); + fflush(new_output_fp); + _DEBUG_NEW_ERROR_ACTION; + } + if (is_array != ptr->is_array) + { + const char* msg; + if (is_array) + msg = "delete[] after new"; + else + msg = "delete after new[]"; + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "%s: pointer %p (size %lu)\n\tat ", + msg, + (char*)ptr + ALIGNED_LIST_ITEM_SIZE, + (unsigned long)ptr->size); + print_position(addr, 0); + fprintf(new_output_fp, "\n\toriginally allocated at "); + if (ptr->line != 0) + print_position(ptr->file, ptr->line); + else + print_position(ptr->addr, ptr->line); + fprintf(new_output_fp, "\n"); + fflush(new_output_fp); + _DEBUG_NEW_ERROR_ACTION; + } +#if _DEBUG_NEW_TAILCHECK + if (!check_tail(ptr)) + { + check_mem_corruption(); + fflush(new_output_fp); + _DEBUG_NEW_ERROR_ACTION; + } +#endif + { + fast_mutex_autolock lock(new_ptr_lock); + total_mem_alloc -= ptr->size; + ptr->magic = 0; + ptr->prev->next = ptr->next; + ptr->next->prev = ptr->prev; + } + if (new_verbose_flag) + { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "delete%s: freed %p (size %lu, %lu bytes still allocated)\n", + is_array ? "[]" : "", + (char*)ptr + ALIGNED_LIST_ITEM_SIZE, + (unsigned long)ptr->size, (unsigned long)total_mem_alloc); + } +#if _DEBUG_NEW_REMEMBER_STACK_TRACE + free(ptr->stacktrace); +#endif + free(ptr); + return; +} + +/** + * Checks for memory leaks. + * + * @return zero if no leakage is found; the number of leaks otherwise + */ +int check_leaks() +{ + int leak_cnt = 0; + int whitelisted_leak_cnt = 0; + fast_mutex_autolock lock_ptr(new_ptr_lock); + fast_mutex_autolock lock_output(new_output_lock); + new_ptr_list_t* ptr = new_ptr_list.next; + + while (ptr != &new_ptr_list) + { + const char* const usr_ptr = (char*)ptr + ALIGNED_LIST_ITEM_SIZE; + if (ptr->magic != DEBUG_NEW_MAGIC) + { + fprintf(new_output_fp, + "warning: heap data corrupt near %p\n", + usr_ptr); + } +#if _DEBUG_NEW_TAILCHECK + if (!check_tail(ptr)) + { + fprintf(new_output_fp, + "warning: overwritten past end of object at %p\n", + usr_ptr); + } +#endif + + if (is_leak_whitelisted(ptr)) + { + ++whitelisted_leak_cnt; + } + else + { + fprintf(new_output_fp, + "Leaked object at %p (size %lu, ", + usr_ptr, + (unsigned long)ptr->size); + + if (ptr->line != 0) + print_position(ptr->file, ptr->line); + else + print_position(ptr->addr, ptr->line); + + fprintf(new_output_fp, ")\n"); + +#if _DEBUG_NEW_REMEMBER_STACK_TRACE + if (ptr->stacktrace != _NULLPTR) + print_stacktrace(ptr->stacktrace); +#endif + } + + ptr = ptr->next; + ++leak_cnt; + } + if (new_verbose_flag || leak_cnt) + { + if (whitelisted_leak_cnt > 0) + { + fprintf(new_output_fp, "*** %d leaks found (%d whitelisted)\n", + leak_cnt, whitelisted_leak_cnt); + } + else + { + fprintf(new_output_fp, "*** %d leaks found\n", leak_cnt); + } + } + + return leak_cnt; +} + +/** + * Checks for heap corruption. + * + * @return zero if no problem is found; the number of found memory + * corruptions otherwise + */ +int check_mem_corruption() +{ + int corrupt_cnt = 0; + fast_mutex_autolock lock_ptr(new_ptr_lock); + fast_mutex_autolock lock_output(new_output_lock); + fprintf(new_output_fp, "*** Checking for memory corruption: START\n"); + for (new_ptr_list_t* ptr = new_ptr_list.next; + ptr != &new_ptr_list; + ptr = ptr->next) + { + const char* const usr_ptr = (char*)ptr + ALIGNED_LIST_ITEM_SIZE; + if (ptr->magic == DEBUG_NEW_MAGIC +#if _DEBUG_NEW_TAILCHECK + && check_tail(ptr) +#endif + ) + continue; +#if _DEBUG_NEW_TAILCHECK + if (ptr->magic != DEBUG_NEW_MAGIC) + { +#endif + fprintf(new_output_fp, + "Heap data corrupt near %p (size %lu, ", + usr_ptr, + (unsigned long)ptr->size); +#if _DEBUG_NEW_TAILCHECK + } + else + { + fprintf(new_output_fp, + "Overwritten past end of object at %p (size %lu, ", + usr_ptr, + (unsigned long)ptr->size); + } +#endif + if (ptr->line != 0) + print_position(ptr->file, ptr->line); + else + print_position(ptr->addr, ptr->line); + fprintf(new_output_fp, ")\n"); + +#if _DEBUG_NEW_REMEMBER_STACK_TRACE + if (ptr->stacktrace != _NULLPTR) + print_stacktrace(ptr->stacktrace); +#endif + + ++corrupt_cnt; + } + fprintf(new_output_fp, "*** Checking for memory corruption: %d FOUND\n", + corrupt_cnt); + return corrupt_cnt; +} + +/** + * Processes the allocated memory and inserts file/line informatin. + * It will only be done when it can ensure the memory is allocated by + * one of our operator new variants. + * + * @param usr_ptr pointer returned by a new-expression + */ +void debug_new_recorder::_M_process(void* usr_ptr) +{ + if (usr_ptr == _NULLPTR) + return; + + // In an expression `new NonPODType[size]', the pointer returned is + // not the pointer returned by operator new[], but offset by size_t + // to leave room for the size. It needs to be compensated here. + size_t offset = (char*)usr_ptr - (char*)_NULLPTR; + if (offset % PLATFORM_MEM_ALIGNMENT != 0) { + offset -= sizeof(size_t); + if (offset % PLATFORM_MEM_ALIGNMENT != 0) { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "warning: memory unaligned; skipping processing (%s:%d)\n", + _M_file, _M_line); + return; + } + usr_ptr = (char*)usr_ptr - sizeof(size_t); + } + + new_ptr_list_t* ptr = + (new_ptr_list_t*)((char*)usr_ptr - ALIGNED_LIST_ITEM_SIZE); + if (ptr->magic != DEBUG_NEW_MAGIC || ptr->line != 0) + { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "warning: debug_new used with placement new (%s:%d)\n", + _M_file, _M_line); + return; + } + if (new_verbose_flag) { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "info: pointer %p allocated from %s:%d\n", + usr_ptr, _M_file, _M_line); + } +#if _DEBUG_NEW_FILENAME_LEN == 0 + ptr->file = _M_file; +#else + strncpy(ptr->file, _M_file, _DEBUG_NEW_FILENAME_LEN - 1) + [_DEBUG_NEW_FILENAME_LEN - 1] = '\0'; +#endif + ptr->line = _M_line; +#if _DEBUG_NEW_REMEMBER_STACK_TRACE == 2 + free(ptr->stacktrace); + ptr->stacktrace = _NULLPTR; +#endif +} + +/** + * Count of source files that use debug_new. + */ +int debug_new_counter::_S_count = 0; + +/** + * Constructor to increment the count. + */ +debug_new_counter::debug_new_counter() +{ + ++_S_count; +} + +/** + * Destructor to decrement the count. When the count is zero, + * nvwa#check_leaks will be called. + */ +debug_new_counter::~debug_new_counter() +{ + if (--_S_count == 0 && new_autocheck_flag) + if (check_leaks()) + { + new_verbose_flag = true; +#if defined(__GNUC__) && __GNUC__ == 3 + if (!getenv("GLIBCPP_FORCE_NEW") && !getenv("GLIBCXX_FORCE_NEW")) + fprintf(new_output_fp, +"*** WARNING: GCC 3 is detected, please make sure the environment\n" +" variable GLIBCPP_FORCE_NEW (GCC 3.2 and 3.3) or GLIBCXX_FORCE_NEW\n" +" (GCC 3.4) is defined. Check the README file for details.\n"); +#endif + } +} + +NVWA_NAMESPACE_END + +#if NVWA_USE_NAMESPACE +using namespace nvwa; +#endif // NVWA_USE_NAMESPACE + +/** + * Allocates memory with file/line information. + * + * @param size size of the required memory block + * @param file null-terminated string of the file name + * @param line line number + * @return pointer to the memory allocated; or null if memory is + * insufficient (#_DEBUG_NEW_STD_OPER_NEW is 0) + * @throw bad_alloc memory is insufficient (#_DEBUG_NEW_STD_OPER_NEW is 1) + */ +void* operator new(size_t size, const char* file, int line) +{ + void* ptr = alloc_mem(size, file, line, false); +#if _DEBUG_NEW_STD_OPER_NEW + if (ptr) + return ptr; + else + throw std::bad_alloc(); +#else + return ptr; +#endif +} + +/** + * Allocates array memory with file/line information. + * + * @param size size of the required memory block + * @param file null-terminated string of the file name + * @param line line number + * @return pointer to the memory allocated; or null if memory is + * insufficient (#_DEBUG_NEW_STD_OPER_NEW is 0) + * @throw bad_alloc memory is insufficient (#_DEBUG_NEW_STD_OPER_NEW is 1) + */ +void* operator new[](size_t size, const char* file, int line) +{ + void* ptr = alloc_mem(size, file, line, true); +#if _DEBUG_NEW_STD_OPER_NEW + if (ptr) + return ptr; + else + throw std::bad_alloc(); +#else + return ptr; +#endif +} + +/** + * Allocates memory without file/line information. + * + * @param size size of the required memory block + * @return pointer to the memory allocated; or null if memory is + * insufficient (#_DEBUG_NEW_STD_OPER_NEW is 0) + * @throw bad_alloc memory is insufficient (#_DEBUG_NEW_STD_OPER_NEW is 1) + */ +void* operator new(size_t size) +{ + return operator new(size, (char*)_DEBUG_NEW_CALLER_ADDRESS, 0); +} + +/** + * Allocates array memory without file/line information. + * + * @param size size of the required memory block + * @return pointer to the memory allocated; or null if memory is + * insufficient (#_DEBUG_NEW_STD_OPER_NEW is 0) + * @throw bad_alloc memory is insufficient (#_DEBUG_NEW_STD_OPER_NEW is 1) + */ +void* operator new[](size_t size) +{ + return operator new[](size, (char*)_DEBUG_NEW_CALLER_ADDRESS, 0); +} + +/** + * Allocates memory with no-throw guarantee. + * + * @param size size of the required memory block + * @return pointer to the memory allocated; or null if memory is + * insufficient + */ +void* operator new(size_t size, const std::nothrow_t&) _NOEXCEPT +{ + return alloc_mem(size, (char*)_DEBUG_NEW_CALLER_ADDRESS, 0, false); +} + +/** + * Allocates array memory with no-throw guarantee. + * + * @param size size of the required memory block + * @return pointer to the memory allocated; or null if memory is + * insufficient + */ +void* operator new[](size_t size, const std::nothrow_t&) _NOEXCEPT +{ + return alloc_mem(size, (char*)_DEBUG_NEW_CALLER_ADDRESS, 0, true); +} + +/** + * Deallocates memory. + * + * @param ptr pointer to the previously allocated memory + */ +void operator delete(void* ptr) _NOEXCEPT +{ + free_pointer(ptr, _DEBUG_NEW_CALLER_ADDRESS, false); +} + +/** + * Deallocates array memory. + * + * @param ptr pointer to the previously allocated memory + */ +void operator delete[](void* ptr) _NOEXCEPT +{ + free_pointer(ptr, _DEBUG_NEW_CALLER_ADDRESS, true); +} + +#if __cplusplus >= 201402L +// GCC under C++14 wants these definitions + +void operator delete(void* ptr, size_t) _NOEXCEPT +{ + free_pointer(ptr, _DEBUG_NEW_CALLER_ADDRESS, false); +} + +void operator delete[](void* ptr, size_t) _NOEXCEPT +{ + free_pointer(ptr, _DEBUG_NEW_CALLER_ADDRESS, true); +} +#endif + +/** + * Placement deallocation function. For details, please check Section + * 5.3.4 of the C++ 1998 or 2011 Standard. + * + * @param ptr pointer to the previously allocated memory + * @param file null-terminated string of the file name + * @param line line number + * + * @see http://www.csci.csusb.edu/dick/c++std/cd2/expr.html#expr.new + * @see http://wyw.dcweb.cn/leakage.htm + */ +void operator delete(void* ptr, const char* file, int line) _NOEXCEPT +{ + if (new_verbose_flag) + { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "info: exception thrown on initializing object at %p (", + ptr); + print_position(file, line); + fprintf(new_output_fp, ")\n"); + } + operator delete(ptr); +} + +/** + * Placement deallocation function. For details, please check Section + * 5.3.4 of the C++ 1998 or 2011 Standard. + * + * @param ptr pointer to the previously allocated memory + * @param file null-terminated string of the file name + * @param line line number + */ +void operator delete[](void* ptr, const char* file, int line) _NOEXCEPT +{ + if (new_verbose_flag) + { + fast_mutex_autolock lock(new_output_lock); + fprintf(new_output_fp, + "info: exception thrown on initializing objects at %p (", + ptr); + print_position(file, line); + fprintf(new_output_fp, ")\n"); + } + operator delete[](ptr); +} + +/** + * Placement deallocation function. For details, please check Section + * 5.3.4 of the C++ 1998 or 2011 Standard. + * + * @param ptr pointer to the previously allocated memory + */ +void operator delete(void* ptr, const std::nothrow_t&) _NOEXCEPT +{ + operator delete(ptr, (char*)_DEBUG_NEW_CALLER_ADDRESS, 0); +} + +/** + * Placement deallocation function. For details, please check Section + * 5.3.4 of the C++ 1998 or 2011 Standard. + * + * @param ptr pointer to the previously allocated memory + */ +void operator delete[](void* ptr, const std::nothrow_t&) _NOEXCEPT +{ + operator delete[](ptr, (char*)_DEBUG_NEW_CALLER_ADDRESS, 0); +} + +// This is to make Doxygen happy +#undef _DEBUG_NEW_REMEMBER_STACK_TRACE +//#define _DEBUG_NEW_REMEMBER_STACK_TRACE 0 + +PRAGMA45(GCC diagnostic pop) +PRAGMACLANG6GCC(GCC diagnostic pop) diff --git a/src/debug/nvwa/debug_new.h b/src/debug/nvwa/debug_new.h new file mode 100644 index 000000000..50b168c2e --- /dev/null +++ b/src/debug/nvwa/debug_new.h @@ -0,0 +1,207 @@ +// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- +// vim:tabstop=4:shiftwidth=4:expandtab: + +/* + * Copyright (C) 2004-2015 Wu Yongwei <adah at users dot sourceforge dot net> + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any + * damages arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute + * it freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must + * not claim that you wrote the original software. If you use this + * software in a product, an acknowledgement in the product + * documentation would be appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must + * not be misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source + * distribution. + * + * This file is part of Stones of Nvwa: + * http://sourceforge.net/projects/nvwa + * + */ + +/** + * @file debug_new.h + * + * Header file for checking leaks caused by unmatched new/delete. + * + * @date 2015-10-25 + */ + +#ifndef NVWA_DEBUG_NEW_H +#define NVWA_DEBUG_NEW_H + +#include <new> // size_t/std::bad_alloc +#include <stdio.h> // FILE +#include "debug/nvwa/_nvwa.h" // NVWA_NAMESPACE_* +#include "debug/nvwa/c++11.h" // _NOEXCEPT + +/* Special allocation/deallocation functions in the global scope */ +void* operator new(size_t size, const char* file, int line); +void* operator new[](size_t size, const char* file, int line); +void operator delete(void* ptr, const char* file, int line) _NOEXCEPT; +void operator delete[](void* ptr, const char* file, int line) _NOEXCEPT; + +NVWA_NAMESPACE_BEGIN + +/** + * @def _DEBUG_NEW_REDEFINE_NEW + * + * Macro to indicate whether redefinition of \c new is wanted. If one + * wants to define one's own <code>operator new</code>, or to call + * <code>operator new</code> directly, it should be defined to \c 0 to + * alter the default behaviour. Unless, of course, one is willing to + * take the trouble to write something like: + * @code + * # ifdef new + * # define _NEW_REDEFINED + * # undef new + * # endif + * + * // Code that uses new is here + * + * # ifdef _NEW_REDEFINED + * # ifdef DEBUG_NEW + * # define new DEBUG_NEW + * # endif + * # undef _NEW_REDEFINED + * # endif + * @endcode + */ +#ifndef _DEBUG_NEW_REDEFINE_NEW +#define _DEBUG_NEW_REDEFINE_NEW 1 +#endif + +/** + * @def _DEBUG_NEW_TYPE + * + * Macro to indicate which variant of #DEBUG_NEW is wanted. The + * default value \c 1 allows the use of placement new (like + * <code>%new(std::nothrow)</code>), but the verbose output (when + * nvwa#new_verbose_flag is \c true) looks worse than some older + * versions (no file/line information for allocations). Define it + * to \c 2 to revert to the old behaviour that records file and line + * information directly on the call to <code>operator new</code>. + */ +#ifndef _DEBUG_NEW_TYPE +#define _DEBUG_NEW_TYPE 1 +#endif + +/** + * Callback type for stack trace printing. + * + * @param fp pointer to the output stream + * @param stacktrace pointer to the stack trace array (null-terminated) + */ +typedef void (*stacktrace_print_callback_t)(FILE* fp, void** stacktrace); + +/** + * Callback type for the leak whitelist function. \a file, \a address, + * and \a backtrace might be null depending on library configuration, + * platform, and amount of runtime information available. \a line can + * be 0 when line number info is not available at runtime. + * + * @param file null-terminated string of the file name + * @param line line number + * @param addr address of code where leakage happens + * @param stacktrace pointer to the stack trace array (null-terminated) + * @return \c true if the leak should be whitelisted; + * \c false otherwise + */ +typedef bool (*leak_whitelist_callback_t)(char const* file, int line, + void* addr, void** stacktrace); + +/* Prototypes */ +int check_leaks(); +int check_mem_corruption(); + +/* Control variables */ +extern bool new_autocheck_flag; // default to true: call check_leaks() on exit +extern bool new_verbose_flag; // default to false: no verbose information +extern FILE* new_output_fp; // default to stderr: output to console +extern const char* new_progname;// default to null; should be assigned argv[0] +extern stacktrace_print_callback_t stacktrace_print_callback;// default to null +extern leak_whitelist_callback_t leak_whitelist_callback; // default to null + +/** + * @def DEBUG_NEW + * + * Macro to catch file/line information on allocation. If + * #_DEBUG_NEW_REDEFINE_NEW is \c 0, one can use this macro directly; + * otherwise \c new will be defined to it, and one must use \c new + * instead. + */ +# if _DEBUG_NEW_TYPE == 1 +# define DEBUG_NEW NVWA::debug_new_recorder(__FILE__, __LINE__) ->* new +# else +# define DEBUG_NEW new(__FILE__, __LINE__) +# endif + +# if _DEBUG_NEW_REDEFINE_NEW +# define new DEBUG_NEW +# endif +# ifdef _DEBUG_NEW_EMULATE_MALLOC +# include <stdlib.h> +# ifdef new +# define malloc(s) ((void*)(new char[s])) +# else +# define malloc(s) ((void*)(DEBUG_NEW char[s])) +# endif +# define free(p) delete[] (char*)(p) +# endif + +/** + * Recorder class to remember the call context. + * + * The idea comes from <a href="http://groups.google.com/group/comp.lang.c++.moderated/browse_thread/thread/7089382e3bc1c489/85f9107a1dc79ee9?#85f9107a1dc79ee9">Greg Herlihy's post</a> in comp.lang.c++.moderated. + */ +class debug_new_recorder +{ + const char* _M_file; + const int _M_line; + void _M_process(void* ptr); +public: + /** + * Constructor to remember the call context. The information will + * be used in debug_new_recorder::operator->*. + */ + debug_new_recorder(const char* file, int line) + : _M_file(file), _M_line(line) {} + /** + * Operator to write the context information to memory. + * <code>operator->*</code> is chosen because it has the right + * precedence, it is rarely used, and it looks good: so people can + * tell the special usage more quickly. + */ + template <class _Tp> _Tp* operator->*(_Tp* ptr) + { _M_process(ptr); return ptr; } +private: + debug_new_recorder(const debug_new_recorder&); + debug_new_recorder& operator=(const debug_new_recorder&); +}; + +/** + * Counter class for on-exit leakage check. + * + * This technique is learnt from <em>The C++ Programming Language</em> by + * Bjarne Stroustup. + */ +class debug_new_counter +{ + static int _S_count; +public: + debug_new_counter(); + ~debug_new_counter(); +}; +/** Counting object for each file including debug_new.h. */ +static debug_new_counter __debug_new_count; + +NVWA_NAMESPACE_END + +#endif // NVWA_DEBUG_NEW_H diff --git a/src/debug/nvwa/fast_mutex.h b/src/debug/nvwa/fast_mutex.h new file mode 100644 index 000000000..faccc4893 --- /dev/null +++ b/src/debug/nvwa/fast_mutex.h @@ -0,0 +1,427 @@ +// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- +// vim:tabstop=4:shiftwidth=4:expandtab: + +/* + * Copyright (C) 2004-2015 Wu Yongwei <adah at users dot sourceforge dot net> + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any + * damages arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute + * it freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must + * not claim that you wrote the original software. If you use this + * software in a product, an acknowledgement in the product + * documentation would be appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must + * not be misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source + * distribution. + * + * This file is part of Stones of Nvwa: + * http://sourceforge.net/projects/nvwa + * + */ + +/** + * @file fast_mutex.h + * + * A fast mutex implementation for POSIX, Win32, and modern C++. + * + * @date 2015-05-19 + */ + +#ifndef NVWA_FAST_MUTEX_H +#define NVWA_FAST_MUTEX_H + +#include "debug/nvwa/_nvwa.h" // NVWA_NAMESPACE_* +#include "debug/nvwa/c++11.h" // HAVE_CXX11_MUTEX + +# if !defined(_NOTHREADS) +# if !defined(NVWA_USE_CXX11_MUTEX) && HAVE_CXX11_MUTEX != 0 && \ + !defined(_WIN32THREADS) && !defined(NVWA_WIN32THREADS) && \ + !defined(NVWA_PTHREADS) && !defined(NVWA_NOTHREADS) && \ + defined(_WIN32) && defined(_MT) && \ + (!defined(_MSC_VER) || defined(_DLL)) +// Prefer using std::mutex on Windows to avoid the namespace +// pollution caused by <windows.h>. However, MSVC has a re-entry +// issue with its std::mutex implementation, and std::mutex should +// not be used unless /MD or /MDd is used. For more information, +// check out: +// +// https://connect.microsoft.com/VisualStudio/feedback/details/776596/std-mutex-not-a-constexpr-with-mtd-compiler-flag +// http://stackoverflow.com/questions/14319344/stdmutex-lock-hangs-when-overriding-the-new-operator +// +# define NVWA_USE_CXX11_MUTEX 1 +# endif + +# if !defined(_WIN32THREADS) && \ + (defined(_WIN32) && defined(_MT)) +// Automatically use _WIN32THREADS when specifying -MT/-MD in MSVC, +// or -mthreads in MinGW GCC. +# define _WIN32THREADS +# elif !defined(_PTHREADS) && \ + defined(_REENTRANT) +// Automatically use _PTHREADS when specifying -pthread in GCC or Clang. +# define _PTHREADS +# endif +# endif + +# ifndef NVWA_USE_CXX11_MUTEX +# if HAVE_CXX11_MUTEX != 0 && \ + !defined(_NOTHREADS) && !defined(NVWA_NOTHREADS) && \ + !defined(_PTHREADS) && !defined(NVWA_PTHREADS) && \ + !defined(_WIN32THREADS) && !defined(NVWA_WIN32THREADS) +# define NVWA_USE_CXX11_MUTEX 1 +# else +# define NVWA_USE_CXX11_MUTEX 0 +# endif +# endif + +# if !defined(_PTHREADS) && !defined(_WIN32THREADS) && \ + !defined(_NOTHREADS) && NVWA_USE_CXX11_MUTEX == 0 +# define _NOTHREADS +# endif + +# if defined(_NOTHREADS) +# if defined(_PTHREADS) || defined(_WIN32THREADS) || \ + NVWA_USE_CXX11_MUTEX != 0 +# undef _NOTHREADS +# error "Cannot define multi-threaded mode with -D_NOTHREADS" +# endif +# endif + +# if defined(__MINGW32__) && defined(_WIN32THREADS) && !defined(_MT) +# error "Be sure to specify -mthreads with -D_WIN32THREADS" +# endif + +// With all the heuristics above, things may still go wrong, maybe even +// due to a specific inclusion order. So they may be overridden by +// manually defining the NVWA_* macros below. +# if NVWA_USE_CXX11_MUTEX == 0 && \ + !defined(NVWA_WIN32THREADS) && \ + !defined(NVWA_PTHREADS) && \ + !defined(NVWA_NOTHREADS) +// _WIN32THREADS takes precedence, as some C++ libraries have _PTHREADS +// defined even on Win32 platforms. +# if defined(_WIN32THREADS) +# define NVWA_WIN32THREADS +# elif defined(_PTHREADS) +# define NVWA_PTHREADS +# else +# define NVWA_NOTHREADS +# endif +# endif + +# ifndef _FAST_MUTEX_CHECK_INITIALIZATION +/** + * Macro to control whether to check for initialization status for each + * lock/unlock operation. Defining it to a non-zero value will enable + * the check, so that the construction/destruction of a static object + * using a static fast_mutex not yet constructed or already destroyed + * will work (with lock/unlock operations ignored). Defining it to zero + * will disable to check. + */ +# define _FAST_MUTEX_CHECK_INITIALIZATION 1 +# endif + +# ifdef _DEBUG +# include <stdio.h> +# include <stdlib.h> +/** Macro for fast_mutex assertions. Real version (for debug mode). */ +# define _FAST_MUTEX_ASSERT(_Expr, _Msg) \ + if (!(_Expr)) { \ + fprintf(stderr, "fast_mutex::%s\n", _Msg); \ + abort(); \ + } +# else +/** Macro for fast_mutex assertions. Fake version (for release mode). */ +# define _FAST_MUTEX_ASSERT(_Expr, _Msg) \ + ((void)0) +# endif + +# if NVWA_USE_CXX11_MUTEX != 0 +# include <mutex> +NVWA_NAMESPACE_BEGIN +/** + * Macro alias to `volatile' semantics. Here it is truly volatile since + * it is in a multi-threaded (C++11) environment. + */ +# define __VOLATILE volatile + /** + * Class for non-reentrant fast mutexes. This is the implementation + * using the C++11 mutex. + */ + class fast_mutex + { + std::mutex _M_mtx_impl; +# if _FAST_MUTEX_CHECK_INITIALIZATION + bool _M_initialized; +# endif +# ifdef _DEBUG + bool _M_locked; +# endif + public: + fast_mutex() +# ifdef _DEBUG + : _M_locked(false) +# endif + { +# if _FAST_MUTEX_CHECK_INITIALIZATION + _M_initialized = true; +# endif + } + ~fast_mutex() + { + _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); +# if _FAST_MUTEX_CHECK_INITIALIZATION + _M_initialized = false; +# endif + } + void lock() + { +# if _FAST_MUTEX_CHECK_INITIALIZATION + if (!_M_initialized) + return; +# endif + _M_mtx_impl.lock(); +# ifdef _DEBUG + _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); + _M_locked = true; +# endif + } + void unlock() + { +# if _FAST_MUTEX_CHECK_INITIALIZATION + if (!_M_initialized) + return; +# endif +# ifdef _DEBUG + _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); + _M_locked = false; +# endif + _M_mtx_impl.unlock(); + } + private: + fast_mutex(const fast_mutex&); + fast_mutex& operator=(const fast_mutex&); + }; +NVWA_NAMESPACE_END +# elif defined(NVWA_PTHREADS) +# include <pthread.h> +NVWA_NAMESPACE_BEGIN +/** + * Macro alias to `volatile' semantics. Here it is truly volatile since + * it is in a multi-threaded (POSIX threads) environment. + */ +# define __VOLATILE volatile + /** + * Class for non-reentrant fast mutexes. This is the implementation + * for POSIX threads. + */ + class fast_mutex + { + pthread_mutex_t _M_mtx_impl; +# if _FAST_MUTEX_CHECK_INITIALIZATION + bool _M_initialized; +# endif +# ifdef _DEBUG + bool _M_locked; +# endif + public: + fast_mutex() +# ifdef _DEBUG + : _M_locked(false) +# endif + { + ::pthread_mutex_init(&_M_mtx_impl, _NULLPTR); +# if _FAST_MUTEX_CHECK_INITIALIZATION + _M_initialized = true; +# endif + } + ~fast_mutex() + { + _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); +# if _FAST_MUTEX_CHECK_INITIALIZATION + _M_initialized = false; +# endif + ::pthread_mutex_destroy(&_M_mtx_impl); + } + void lock() + { +# if _FAST_MUTEX_CHECK_INITIALIZATION + if (!_M_initialized) + return; +# endif + ::pthread_mutex_lock(&_M_mtx_impl); +# ifdef _DEBUG + // The following assertion should _always_ be true for a + // real `fast' pthread_mutex. However, this assertion can + // help sometimes, when people forget to use `-lpthread' and + // glibc provides an empty implementation. Having this + // assertion is also more consistent. + _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); + _M_locked = true; +# endif + } + void unlock() + { +# if _FAST_MUTEX_CHECK_INITIALIZATION + if (!_M_initialized) + return; +# endif +# ifdef _DEBUG + _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); + _M_locked = false; +# endif + ::pthread_mutex_unlock(&_M_mtx_impl); + } + private: + fast_mutex(const fast_mutex&); + fast_mutex& operator=(const fast_mutex&); + }; +NVWA_NAMESPACE_END +# elif defined(NVWA_WIN32THREADS) +# ifndef WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +# endif /* WIN32_LEAN_AND_MEAN */ +# include <windows.h> +NVWA_NAMESPACE_BEGIN +/** + * Macro alias to `volatile' semantics. Here it is truly volatile since + * it is in a multi-threaded (Win32 threads) environment. + */ +# define __VOLATILE volatile + /** + * Class for non-reentrant fast mutexes. This is the implementation + * for Win32 threads. + */ + class fast_mutex + { + CRITICAL_SECTION _M_mtx_impl; +# if _FAST_MUTEX_CHECK_INITIALIZATION + bool _M_initialized; +# endif +# ifdef _DEBUG + bool _M_locked; +# endif + public: + fast_mutex() +# ifdef _DEBUG + : _M_locked(false) +# endif + { + ::InitializeCriticalSection(&_M_mtx_impl); +# if _FAST_MUTEX_CHECK_INITIALIZATION + _M_initialized = true; +# endif + } + ~fast_mutex() + { + _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); +# if _FAST_MUTEX_CHECK_INITIALIZATION + _M_initialized = false; +# endif + ::DeleteCriticalSection(&_M_mtx_impl); + } + void lock() + { +# if _FAST_MUTEX_CHECK_INITIALIZATION + if (!_M_initialized) + return; +# endif + ::EnterCriticalSection(&_M_mtx_impl); +# ifdef _DEBUG + _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); + _M_locked = true; +# endif + } + void unlock() + { +# if _FAST_MUTEX_CHECK_INITIALIZATION + if (!_M_initialized) + return; +# endif +# ifdef _DEBUG + _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); + _M_locked = false; +# endif + ::LeaveCriticalSection(&_M_mtx_impl); + } + private: + fast_mutex(const fast_mutex&); + fast_mutex& operator=(const fast_mutex&); + }; +NVWA_NAMESPACE_END +# elif defined(NVWA_NOTHREADS) +NVWA_NAMESPACE_BEGIN +/** + * Macro alias to `volatile' semantics. Here it is not truly volatile + * since it is in a single-threaded environment. + */ +# define __VOLATILE + /** + * Class for non-reentrant fast mutexes. This is the null + * implementation for single-threaded environments. + */ + class fast_mutex + { +# ifdef _DEBUG + bool _M_locked; +# endif + public: + fast_mutex() +# ifdef _DEBUG + : _M_locked(false) +# endif + { + } + ~fast_mutex() + { + _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); + } + void lock() + { +# ifdef _DEBUG + _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); + _M_locked = true; +# endif + } + void unlock() + { +# ifdef _DEBUG + _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); + _M_locked = false; +# endif + } + private: + fast_mutex(const fast_mutex&); + fast_mutex& operator=(const fast_mutex&); + }; +NVWA_NAMESPACE_END +# endif // Definition of class fast_mutex + +NVWA_NAMESPACE_BEGIN +/** RAII lock class for fast_mutex. */ +class fast_mutex_autolock +{ + fast_mutex& _M_mtx; +public: + explicit fast_mutex_autolock(fast_mutex& mtx) : _M_mtx(mtx) + { + _M_mtx.lock(); + } + ~fast_mutex_autolock() + { + _M_mtx.unlock(); + } +private: + fast_mutex_autolock(const fast_mutex_autolock&); + fast_mutex_autolock& operator=(const fast_mutex_autolock&); +}; +NVWA_NAMESPACE_END + +#endif // NVWA_FAST_MUTEX_H diff --git a/src/debug/nvwa/static_assert.h b/src/debug/nvwa/static_assert.h new file mode 100644 index 000000000..877ef0f97 --- /dev/null +++ b/src/debug/nvwa/static_assert.h @@ -0,0 +1,62 @@ +// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- +// vim:tabstop=4:shiftwidth=4:expandtab: + +/* + * Copyright (C) 2004-2013 Wu Yongwei <adah at users dot sourceforge dot net> + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any + * damages arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute + * it freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must + * not claim that you wrote the original software. If you use this + * software in a product, an acknowledgement in the product + * documentation would be appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must + * not be misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source + * distribution. + * + * This file is part of Stones of Nvwa: + * http://sourceforge.net/projects/nvwa + * + */ + +/** + * @file static_assert.h + * + * Template class to check validity duing compile time (adapted from Loki). + * + * @date 2013-09-07 + */ + +#ifndef STATIC_ASSERT + +#include "debug/nvwa/c++11.h" + +#if HAVE_CXX11_STATIC_ASSERT + +#define STATIC_ASSERT(_Expr, _Msg) static_assert(_Expr, #_Msg) + +#else + +namespace nvwa { + +template <bool> struct compile_time_error; +template <> struct compile_time_error<true> {}; + +#define STATIC_ASSERT(_Expr, _Msg) \ + { \ + nvwa::compile_time_error<((_Expr) != 0)> ERROR_##_Msg; \ + (void)ERROR_##_Msg; \ + } + +} + +#endif // HAVE_CXX11_STATIC_ASSERT + +#endif // STATIC_ASSERT |