/*
* DUMA - Red-Zone memory allocator.
* Copyright (C) 2006 Michael Eddington <meddington@gmail.com>
* Copyright (C) 2002-2009 Hayati Ayguen <h_ayguen@web.de>, Procitec GmbH
* Copyright (C) 1987-1999 Bruce Perens <bruce@perens.com>
* License: GNU GPL (GNU General Public License, see COPYING-GPL)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* FILE CONTENTS:
* --------------
* This is a special version of malloc() and company for debugging software
* that is suspected of overrunning or underrunning the boundaries of a
* malloc buffer, or touching free memory.
*
* It arranges for each malloc buffer to be followed (or preceded)
* in the address space by an inaccessable virtual memory page,
* and for free memory to be inaccessable. If software touches the
* inaccessable page, it will get an immediate segmentation
* fault. It is then trivial to uncover the offending code using a debugger.
*
* An advantage of this product over most malloc debuggers is that this one
* detects reading out of bounds as well as writing, and this one stops on
* the exact instruction that causes the error, rather than waiting until the
* next boundary check.
*
* There is one product that debugs malloc buffer overruns
* better than DUMA: "Purify" from Purify Systems, and that's only
* a small part of what Purify does. I'm not affiliated with Purify, I just
* respect a job well done.
*
* This version of malloc() should not be linked into production software,
* since it tremendously increases the time and memory overhead of malloc().
* Each malloc buffer will consume a minimum of two virtual memory pages,
* this is 16 kilobytes on many systems. On some systems it will be necessary
* to increase the amount of swap space in order to debug large programs that
* perform lots of allocation, because of the per-buffer overhead.
*/
#ifndef DUMA_NO_DUMA
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include <string.h>
extern char *strdup(const char *s);
#include <signal.h>
#include <errno.h>
#include <stdarg.h>
#ifndef WIN32
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#define __USE_BSD // necessary for caddr_t on Linux
#define __USE_MISC // necessary for caddr_t on Linux
#include <sys/types.h>
#else
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#include <winbase.h>
#include <io.h>
#ifndef __CYGWIN__
/* already defined in cygwin headers */
typedef LPVOID caddr_t;
typedef unsigned u_int;
#endif
#endif
#ifdef _MSC_VER
#include <crtdbg.h>
#endif
#include "duma.h"
#include "noduma.h"
#include "print.h"
#include "duma_sem.h"
#include "paging.h"
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
DUMA_EXTERN_C void StackTraceCleanup();
DUMA_EXTERN_C void printStackTrace(char* buffer, int bufferSize, char* mapFilename);
#endif
static const char version[] =
"DUMA 2.5.15 ("
#ifdef DUMA_SO_LIBRARY
"shared library"
#elif DUMA_DLL_LIBRARY
"DLL library"
#elif DUMA_DETOURS
"detours"
#else
"static library"
#endif
#ifdef DUMA_NO_GLOBAL_MALLOC_FREE
", NO_GLOBAL_MALLOC_FREE"
#endif
#ifdef DUMA_NO_THREAD_SAFETY
", NO_THREAD_SAFETY"
#endif
#ifdef DUMA_NO_CPP_SUPPORT
", NO_CPP_SUPPORT"
#endif
#ifdef DUMA_NO_LEAKDETECTION
", NO_LEAKDETECTION"
#endif
#ifdef DUMA_EXPLICIT_INIT
", EXPLICIT_INIT"
#endif
#ifdef DUMA_PREFER_ATEXIT
", PREFER_ATEXIT"
#endif
#ifdef DUMA_PREFER_GETENV
", PREFER_GETENV"
#endif
")\n"
"Copyright (C) 2006 Michael Eddington <meddington@gmail.com>\n"
"Copyright (C) 2002-2008 Hayati Ayguen <h_ayguen@web.de>, Procitec GmbH\n"
"Copyright (C) 1987-1999 Bruce Perens <bruce@perens.com>\n\n";
static const char unknown_file[] =
"UNKNOWN (use #include \"duma.h\")";
#ifndef DUMA_NO_LEAKDETECTION
#define DUMA_PARAMLIST_FL , const char * filename, int lineno
#define DUMA_PARAMS_FL , filename, lineno
#define DUMA_PARAMS_UK , unknown_file, 0
#else
#define DUMA_PARAMLIST_FL
#define DUMA_PARAMS_FL
#define DUMA_PARAMS_UK
#endif
#ifndef DUMA_PREFER_GETENV
#define DUMA_GETENV duma_getenv
#else
#define DUMA_GETENV getenv
#endif
/* Variable: MEMORY_CREATION_SIZE
*
* MEMORY_CREATION_SIZE is the amount of memory to get from the operating
* system at one time. We'll break that memory down into smaller pieces for
* malloc buffers. One megabyte is probably a good value.
*/
#define MEMORY_CREATION_SIZE 1024 * 1024
/* Enum: _DUMA_SlotState
*
* State of slot values (empty, free, etc)
*/
enum _DUMA_SlotState
{
DUMAST_EMPTY /* slot not in use */
, DUMAST_FREE /* internal memory reserved, unused by user */
, DUMAST_IN_USE /* memory in use by allocator; see following enum AllocType */
, DUMAST_ALL_PROTECTED /* memory no more used by allocator; memory is not deallocated but protected */
, DUMAST_BEGIN_PROTECTED /* most memory deallocated, but not page covering userAddress:
* slot holds userAddress, userSize and allocator.
*/
};
enum _DUMA_Slot_FileSource
{
DUMAFS_EMPTY /* no filename, lineno */
, DUMAFS_ALLOCATION /* filename, lineno from allocation */
, DUMAFS_DEALLOCATION /* filename, lineno from deallocation */
};
enum _DUMA_InitState
{
DUMAIS_UNINITIALIZED = 0x1611 /* not initialized */
, DUMAIS_IN_CONSTRUCTOR /* in constructor _duma_init() */
, DUMAIS_OUT_CONSTRUCTOR /* construction _duma_init() finished */
, DUMAIS_IN_INIT /* in initializer duma_init() */
, DUMAIS_OUT_INIT /* initialization duma_init() finished */
};
/*
* Struct Slot contains all of the information about a malloc buffer except
* for the contents of its memory.
*/
struct _DUMA_Slot
{
void * internalAddress;
void * userAddress;
void * protAddress;
size_t internalSize;
size_t userSize;
#if 0
/* just for checking compiler warnings / errors */
enum _DUMA_SlotState state;
enum _DUMA_Allocator allocator;
#ifndef DUMA_NO_LEAKDETECTION
enum _DUMA_Slot_FileSource fileSource;
#endif
#else
/* save (some) space in production */
unsigned short state :16;
#ifdef DUMA_NO_LEAKDETECTION
unsigned short allocator :16;
#else
unsigned short allocator :8;
unsigned short fileSource :8;
#endif
#endif
#ifndef DUMA_NO_LEAKDETECTION
char * filename; /* filename of allocation */
int lineno; /* linenumber of allocation
* -1 == memory was allocated before duma_init()
* 0 == no leak information present
* >0 == leak information present
*/
#endif
/* Feature currently only works on win32 */
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
char * stacktrace; /* stacktrace of allocation */
#endif
#ifdef DUMA_EXPLICIT_INIT
int slackfill;
#endif
};
enum _DUMA_AllocType
{
DUMAAT_INTERNAL
, DUMAAT_MALLOC
, DUMAAT_NEW_ELEM
, DUMAAT_NEW_ARRAY
, DUMAAT_MEMBER_NEW_ELEM
, DUMAAT_MEMBER_NEW_ARRAY
};
enum _DUMA_AllocStd
{
DUMAAS_C
, DUMAAS_CPP
};
static const struct _DUMA_AllocDesc
{
char * name;
enum _DUMA_AllocType type;
enum _DUMA_AllocStd std;
}
_duma_allocDesc[] =
{
{ "duma allocate()" , DUMAAT_INTERNAL , DUMAAS_C }
, { "duma deallocate()" , DUMAAT_INTERNAL , DUMAAS_C }
, { "malloc()" , DUMAAT_MALLOC , DUMAAS_C }
, { "calloc()" , DUMAAT_MALLOC , DUMAAS_C }
, { "free()" , DUMAAT_MALLOC , DUMAAS_C }
, { "memalign()" , DUMAAT_MALLOC , DUMAAS_C }
, { "posix_memalign()" , DUMAAT_MALLOC , DUMAAS_C }
, { "realloc()" , DUMAAT_MALLOC , DUMAAS_C }
, { "valloc()" , DUMAAT_MALLOC , DUMAAS_C }
, { "strdup()" , DUMAAT_MALLOC , DUMAAS_C }
, { "scalar new" , DUMAAT_NEW_ELEM , DUMAAS_CPP }
, { "scalar delete" , DUMAAT_NEW_ELEM , DUMAAS_CPP }
, { "vector new[]" , DUMAAT_NEW_ARRAY , DUMAAS_CPP }
, { "vector delete[]" , DUMAAT_NEW_ARRAY , DUMAAS_CPP }
, { "member scalar new" , DUMAAT_MEMBER_NEW_ELEM , DUMAAS_CPP }
, { "member scalar delete" , DUMAAT_MEMBER_NEW_ELEM , DUMAAS_CPP }
, { "member vector new[]" , DUMAAT_MEMBER_NEW_ARRAY, DUMAAS_CPP }
, { "member vector delete[]", DUMAAT_MEMBER_NEW_ARRAY, DUMAAS_CPP }
};
#ifdef DUMA_EXPLICIT_INIT
#define IF__DUMA_INIT_DONE if (DUMAIS_OUT_INIT == _duma_s.init_state)
#else
#define IF__DUMA_INIT_DONE
#endif
/* Collection of all global static non const variables for DUMA */
static struct _DUMA_GlobalStaticVars
{
/* Protection Space A */
char acSpaceA[2 * DUMA_PAGE_SIZE];
int DUMA_IN_DUMA;
/* Variable: DUMA_DISABLE_BANNER
*
* DUMA_DISABLE_BANNER is a global variable used to control whether DUMA prints
* its usual startup message. Default is 0, meaning that the startup message
* gets printed.
*/
int DISABLE_BANNER;
/* Variable: DUMA_SKIPCOUNT_INIT
*
* DUMA_SKIPCOUNT_INIT controls after how many DUMA allocations the full internal
* initialization is done. Default is 0.
*/
int SKIPCOUNT_INIT;
/* Variable: CHECK_FREQ
*
* DUMA_CHECK_FREQ controls the frequency to check all memory blocks no man's land.
* The frequency counter is incremented at each memory allocation and deallocation.
* Whenever the counter reaches the value of DUMA_CHECK_FREQ the check is performed.
* 0 means no checks. 1 means to check always. Be careful with this value, it may
* get very time consuming.
* Default is 0.
*/
int CHECK_FREQ;
/* Variable: DUMA_REPORT_ALL_LEAKS
*
* DUMA_REPORT_ALL_LEAKS is a global variable used to control whether DUMA should
* all leaks - even without source filename/line number. Default is 0, meaning that
* only leaks with source information will get reported.
*/
int REPORT_ALL_LEAKS;
/* Variable: DUMA_SLACKFILL
*
* DUMA_SLACKFILL is set to 0-255. The slack / no mans land of all new allocated
* memory is filled with the specified value.
* default is set to initialise with 0xAA (=binary 10101010)
* initialisation to 0!
*/
int SLACKFILL;
/* Variable: DUMA_PROTECT_FREE
*
* DUMA_PROTECT_FREE is used to control the disposition of memory that is
* released using free(). It is all-caps so that its name
* matches the name of the environment variable that is used to set it.
* If its value is non-zero, memory released by free is made inaccessable.
* Any software that touches free memory will then get a segmentation fault.
* Depending on your application and your resources you may tell
* DUMA not to use this memory ever again by setting a negative
* value f.e. -1.
* You can tell DUMA to limit the sum of protected memory by setting
* a positive value, which is interpreted in kB.
* If its value is zero, freed memory will be available for reallocation,
* but will still be inaccessable until it is reallocated.
*/
long PROTECT_FREE;
/* Variable: DUMA_MAX_ALLOC
*
* DUMA_MAX_ALLOC is used to control the maximum memory print of the program
* in total: When the sum of allocated and protected memory would exceed
* this value in kB, the protected memory is freed/deleted.
*/
long MAX_ALLOC;
#if 0
/* Variable: DUMA_ALLOW_MALLOC_0
*
* DUMA_ALLOW_MALLOC_0 is set if DUMA is to allow malloc(0). I
* trap malloc(0) by default because it is a common source of bugs.
* But you should know the allocation with size 0 is ANSI conform.
*/
int ALLOW_MALLOC_0;
#endif
/* Variable: DUMA_MALLOC_0_STRATEGY
*
* DUMA_MALLOC_0_STRATEGY how DUMA should behave on malloc(0).
* 0 - like having former ALLOW_MALLOC_0 = 0 ==> abort program with segfault
* 1 - return NULL pointer
* 2 - return always the same pointer to some protected page
* 3 - return unique protected page (=default)
* ATTENTION: only 1 and 3 are ANSI conform. But value 1 will break most programs,
* cause value 3 is the usual one, the system libraries implement
*/
int MALLOC_0_STRATEGY;
/* Variable: DUMA_NEW_0_STRATEGY
*
* DUMA_NEW_0_STRATEGY how DUMA should behave on C++ operator new or new[]
* with size 0
* 2 - return always the same pointer to some protected page
* 3 - return unique protected page (=default)
* ATTENTION: only 3 is standard conform. Value 2 may break some but will
* work for most programs. With value 2 you may reduce the memory consumption.
*/
int NEW_0_STRATEGY;
/* Variable: DUMA_MALLOC_FAILEXIT
*
* DUMA_MALLOC_FAILEXIT controls the behaviour of DUMA when
* malloc() fails and would return NULL. But most applications don't
* check the return value for errors ... so
* default to Exit on Fail
*/
int MALLOC_FAILEXIT;
/* Variable: DUMA_FREE_ACCESS
*
* DUMA_FREE_ACCESS is set if DUMA is to write access memory before
* freeing it. This makes easier using watch expressions in debuggers as the
* process is interrupted even if the memory is going to be freed.
*/
int FREE_ACCESS;
/* Variable: DUMA_SHOW_ALLOC
*
* DUMA_SHOW_ALLOC is set if DUMA is to print all allocations
* and deallocations to the console. Although this generates a lot
* of messages, the option can be useful to detect inefficient code
* containing many allocations / deallocations
*/
int SHOW_ALLOC;
/* Variable: DUMA_SUPPRESS_ATEXIT
*
* DUMA_SUPPRESS_ATEXIT is set if DUMA is to suppress the installation of
* an exit handler, called at the exit of the main program. This handler allows for
* the detection of memory areas that have not been freed correctly before
* program exit, so the handler's installation should *normally* not be
* suppressed. One reason for doing so regardless are some buggy environments,
* where calls to the atexit()-function hang.
*/
int SUPPRESS_ATEXIT;
/* Variable: _duma_allocListSize
*
* _duma_allocListSize is the size of the allocation list. This will always
* be a multiple of the page size.
*/
size_t allocListSize;
/* Variable: slotCount
*
* slotCount is the number of Slot structures in allocationList.
*/
size_t slotCount;
/* Variable: unUsedSlots
*
* unUsedSlots is the number of Slot structures that are currently available
* to represent new malloc buffers. When this number gets too low, we will
* create new slots.
*/
size_t unUsedSlots;
/* Variable: slotsPerPage
*
* slotsPerPage is the number of slot structures that fit in a virtual
* memory page.
*/
size_t slotsPerPage;
/* Variable: sumAllocatedMem
*
* internal variable: sum of allocated -freed +protected memory in kB
*/
long sumAllocatedMem;
/* Variable: sumTotalAllocatedMem
*
* internal variable: sum of allocated memory in kB
*/
long sumTotalAllocatedMem;
/* Variable: sumProtectedMem
*
* internal variable: sum of protected memory in kB
*/
long sumProtectedMem;
/* Variable: numDeallocs
*
* internal variable: number of deallocations processed so far
*/
long numDeallocs;
/* Variable: numAllocs
*
* internal variable: number of allocations processed so far
*/
long numAllocs;
/* Variable checkFreqCounter
*
* number of (de)allocations since last checks
*/
int checkFreqCounter;
/* Variable: duma_init_state
*
* internal variable: state of initialization
*/
enum _DUMA_InitState init_state;
/* memory block for malloc() or new with size 0 */
void * null_block;
/* Protection Space B */
char acSpaceB[2 * DUMA_PAGE_SIZE];
}
_duma_s =
{
"Static Protection Space Front" /* Protection Space A */
, 0 /* int DUMA_IN_DUMA; */
, 0 /* Variable: DISABLE_BANNER */
, 0 /* Variable: SKIPCOUNT_INIT */
, 1 /* Variable: CHECK_FREQ */
, 0 /* Variable: REPORT_ALL_LEAKS */
, 0xDB /* Variable: SLACKFILL */
, -1L /* Variable: PROTECT_FREE */
, -1L /* Variable: MAX_ALLOC */
#if 0
, 1 /* Variable: ALLOW_MALLOC_0 */
#endif
, 3 /* Variable: MALLOC_0_STRATEGY; see above */
, 3 /* Variable: NEW_0_STRATEGY; see above */
, 1 /* Variable: MALLOC_FAILEXIT */
, 0 /* Variable: FREE_ACCESS */
, 0 /* Variable: SHOW_ALLOC */
, 0 /* Variable: SUPPRESS_ATEXIT */
, 0 /* Variable: allocListSize */
, 0 /* Variable: slotCount */
, 0 /* Variable: unUsedSlots */
, 0 /* Variable: slotsPerPage */
, 0L /* Variable: sumAllocatedMem */
, 0L /* Variable: sumTotalAllocatedMem */
, 0L /* Variable: sumProtectedMem */
, 0L /* Variable: numDeallocs */
, 0L /* Variable: numAllocs */
, 0 /* Variable: checkFreqCounter */
, DUMAIS_UNINITIALIZED /* Variable: duma_init_done */
, (void *)0 /* Variable: null_block */
, "Static Protection Space Back" /* Protection Space B */
};
DUMA_GLOBALVARS_T _duma_g =
{
"Global Protection Space Front" /* Protection Space A */
, (void*)0 /* Variable: allocList */
, (void*)0 /* Variable: null_addr */
, { DUMA_MIN_ALIGNMENT
, 0 /* PROTECT_BELOW */
, 255 /* FILL */
#if !defined(DUMA_NO_CPP_SUPPORT) && !defined(DUMA_NO_LEAKDETECTION)
, 0 /* Magic */
, 0 /* DelPtr */
, { 0 }
, { 0 }
#endif
}
, "Global Protection Space Back" /* Protection Space B */
};
/* Variable: DUMA_OUTPUT_DEBUG
*
* DUMA_OUTPUT_DEBUG is a global variable used to control if DUMA
* output is printed to the win32 debugging console. Default is 0,
* meaning that output is not by default sent to the debugging console.
*
* OS: WIN32 Only
*/
int DUMA_OUTPUT_DEBUG = 0;
/* Variable: DUMA_OUTPUT_STDOUT
*
* DUMA_OUTPUT_STDOUT is a global variable used to control if DUMA
* output is printed to STDOUT. Default is 0,
* meaning that output is not by default sent to STDOUT.
*/
int DUMA_OUTPUT_STDOUT = 0;
/* Variable: DUMA_OUTPUT_STDERR
*
* DUMA_OUTPUT_STDERR is a global variable used to control if DUMA
* output is printed to STDERR. Default is 1,
* meaning that output is by default sent to STDERR.
*/
int DUMA_OUTPUT_STDERR = 1;
/* Variable: DUMA_OUTPUT_FILE
*
* DUMA_OUTPUT_FILE is a global variable used to control if DUMA
* output is printed to a specified file. Default is NULL,
* meaning that output is not by default sent to a file.
*/
char* DUMA_OUTPUT_FILE = NULL;
/* char* DUMA_OUTPUT_FILE = "c:\\duma.txt"; */
/* Variable: DUMA_OUTPUT_STACKTRACE
*
* DUMA_OUTPUT_STACKTRACE is a global variable used to control if DUMA
* outputs a stacktrace of the allocation that is not free'd. Default is 0,
* meaning that this option is disabled.
*
* OS: WIN32 Only
*/
int DUMA_OUTPUT_STACKTRACE = 0;
/* Variable: DUMA_OUTPUT_STACKTRACE_MAPFILE
*
* DUMA_OUTPUT_STACKTRACE_MAPFILE is a global variable used to control
* what mapfile is used for stack traces. This is needed when using
* detours and duma. Default is NULL, indicating the system will try
* and guess.
*
* OS: WIN32 Only
*/
char* DUMA_OUTPUT_STACKTRACE_MAPFILE = NULL;
/*
* include helper functions
*/
#include "duma_hlp.h"
#ifndef DUMA_NO_LEAKDETECTION
/*
* declare exit function
*/
void
#if ( defined(DUMA_GNU_INIT_ATTR) && !defined(DUMA_PREFER_ATEXIT) )
__attribute ((destructor))
#endif
_duma_exit(void);
#endif
// Avoid pulling in stubs_passert.h here, causes too many issues
// define a weak fallback for code that doesn't pull in clar
__attribute__((__weak__)) void passert_failed(
const char* filename, int line_number, const char* message, ...) {
va_list ap;
va_start(ap, message);
printf("*** ASSERTION FAILED: %s:%u\n", filename, line_number);
if (message) {
vprintf(message, ap);
}
va_end(ap);
printf("\n");
abort();
}
/* Function: _duma_assert
*
* Print message and halt program execution in crazy way.
*/
void _duma_assert(const char * exprstr, const char * filename, int lineno)
{
passert_failed(filename, lineno, "\nDUMA: DUMA_ASSERT(%s) failed)\n", exprstr);
}
#ifndef DUMA_PREFER_GETENV
extern char **environ;
/* Function: duma_getenv
*
* replacement for standard C library function
*/
static
const char * duma_getenv( const char * varname )
{
const char * ret = NULL;
int varno = 0;
if ( !varname )
return ret;
if ( varname[0] == '\0' )
return ret;
while ( environ[varno] )
{
const char * v = environ[varno++];
int idx = 0;
while ( varname[idx] != '\0' && v[idx] == varname[idx] )
++idx;
if ( idx > 0 && varname[idx] == '\0' && v[idx] == '=' )
return v + (idx +1);
}
return ret;
}
#endif
static
void duma_getenvvars( DUMA_TLSVARS_T * duma_tls )
{
const char * string;
/*
* Import the user's environment specification of the default
* alignment for malloc(). We want that alignment to be under
* user control, since smaller alignment lets us catch more bugs,
* however some software will break if malloc() returns a buffer
* that is not word-aligned.
*
* I would like
* alignment to be zero so that we could catch all one-byte
* overruns, however if malloc() is asked to allocate an odd-size
* buffer and returns an address that is not word-aligned, or whose
* size is not a multiple of the word size, software breaks.
* This was the case with the Sun string-handling routines,
* which can do word fetches up to three bytes beyond the end of a
* string. I handle this problem in part by providing
* byte-reference-only versions of the string library functions, but
* there are other functions that break, too. Some in X Windows, one
* in Sam Leffler's TIFF library, and doubtless many others.
*/
if ( (string = DUMA_GETENV("DUMA_ALIGNMENT")) != 0 )
{
duma_tls->ALIGNMENT = (size_t)atoi(string);
/* we could check for DUMA_MIN_ALIGNMENT. should we do so? */
if (!duma_tls->ALIGNMENT)
duma_tls->ALIGNMENT = 1;
}
/*
* See if the user wants to protect the address space below a buffer,
* rather than that above a buffer.
*/
if ( (string = DUMA_GETENV("DUMA_PROTECT_BELOW")) != 0 )
duma_tls->PROTECT_BELOW = (atoi(string) != 0);
/* Should we report all leaks? */
if ( (string = DUMA_GETENV("DUMA_REPORT_ALL_LEAKS")) != 0 )
_duma_s.REPORT_ALL_LEAKS = (atoi(string) != 0);
/*
* See if the user wants to protect memory that has been freed until
* the program exits, rather than until it is re-allocated.
* =-1 protect as much free'd memory as possible
* =0 do not protect free'd memory
* =N protect memory up to N kB
*/
if ( (string = DUMA_GETENV("DUMA_PROTECT_FREE")) != 0 )
_duma_s.PROTECT_FREE = atol(string);
/*
* See if the user has a memory usage limit. This controls the maximum
* memory print of the program in total: The sum of allocated and protected
* memory won't exceed this limit.
* =-1 use as much memory as possible
* =N limit total memory usage to N kB
*/
if ( (string = DUMA_GETENV("DUMA_MAX_ALLOC")) != 0 )
_duma_s.MAX_ALLOC = atol(string);
#if 0
/*
* See if the user wants to allow malloc(0).
*/
if ( (string = DUMA_GETENV("DUMA_ALLOW_MALLOC_0")) != 0 )
_duma_s.ALLOW_MALLOC_0 = (atoi(string) != 0);
#endif
/*
* See what strategy the user wants for malloc(0).
*/
if ( (string = DUMA_GETENV("MALLOC_0_STRATEGY")) != 0 )
{
int tmp = atoi(string);
if ( tmp >= 0 && tmp <= 3 )
_duma_s.MALLOC_0_STRATEGY = tmp;
}
/*
* See what strategy the user wants for C++ operator new with size zero.
*/
if ( (string = DUMA_GETENV("NEW_0_STRATEGY")) != 0 )
{
int tmp = atoi(string);
if ( tmp >= 2 && tmp <= 3 )
_duma_s.NEW_0_STRATEGY = tmp;
}
/*
* See if the user wants to exit on malloc() failure
*/
if ( (string = DUMA_GETENV("DUMA_MALLOC_FAILEXIT")) != 0 )
_duma_s.MALLOC_FAILEXIT = (atoi(string) != 0);
/*
* See if the user wants to write access freed memory
*/
if ( (string = DUMA_GETENV("DUMA_FREE_ACCESS")) != 0 )
_duma_s.FREE_ACCESS = (atoi(string) != 0);
/*
* Check if we should be filling new memory with a value.
*/
if ( (string = DUMA_GETENV("DUMA_FILL")) != 0)
{
duma_tls->FILL = atoi(string);
if ( -1 != duma_tls->FILL )
duma_tls->FILL &= 255;
}
/*
* Check with which value the memories no mans land is filled
*/
if ( (string = DUMA_GETENV("DUMA_SLACKFILL")) != 0)
_duma_s.SLACKFILL = atoi(string);
_duma_s.SLACKFILL &= 255;
/*
* See if the user wants to see allocations / frees
*/
if ( (string = DUMA_GETENV("DUMA_SHOW_ALLOC")) != 0 )
_duma_s.SHOW_ALLOC = (atoi(string) != 0);
/*
* See if the user wants to call atexit()
*/
if ( (string = DUMA_GETENV("DUMA_SUPPRESS_ATEXIT")) != 0 )
_duma_s.SUPPRESS_ATEXIT = (atoi(string) != 0);
/*
* DUMA_OUTPUT_STACKTRACE is a global variable used to control if DUMA
* outputs a stacktrace of the allocation that is not free'd. Default is 0,
* meaning that this option is disabled.
*/
if ( (string = DUMA_GETENV("DUMA_OUTPUT_STACKTRACE")) != 0 )
DUMA_OUTPUT_STACKTRACE = (atoi(string) != 0);
/*
* DUMA_OUTPUT_STACKTRACE is a global variable used to control if DUMA
* outputs a stacktrace of the allocation that is not free'd. Default is 0,
* meaning that this option is disabled.
*/
if ( (string = DUMA_GETENV("DUMA_OUTPUT_STACKTRACE_MAPFILE")) != 0 )
DUMA_OUTPUT_STACKTRACE_MAPFILE = strdup(string);
/*
* DUMA_OUTPUT_DEBUG is a global variable used to control if DUMA
* output is printed to the win32 debugging console. Default is 0,
* meaning that output is not by default sent to the debugging console.
*/
if ( (string = DUMA_GETENV("DUMA_OUTPUT_DEBUG")) != 0 )
DUMA_OUTPUT_DEBUG = (atoi(string) != 0);
/*
* DUMA_OUTPUT_STDOUT is a global variable used to control if DUMA
* output is printed to STDOUT. Default is 0,
* meaning that output is not by default sent to STDOUT.
*/
if ( (string = DUMA_GETENV("DUMA_OUTPUT_STDOUT")) != 0 )
DUMA_OUTPUT_STDOUT = (atoi(string) != 0);
/*
* DUMA_OUTPUT_STDERR is a global variable used to control if DUMA
* output is printed to STDERR. Default is 1,
* meaning that output is by default sent to STDERR.
*/
if ( (string = DUMA_GETENV("DUMA_OUTPUT_STDERR")) != 0 )
DUMA_OUTPUT_STDERR = (atoi(string) != 0);
/*
* DUMA_OUTPUT_FILE is a global variable used to control if DUMA
* output is printed to a specified file. Default is NULL,
* meaning that output is not by default sent to a file.
*/
if ( (string = DUMA_GETENV("DUMA_OUTPUT_FILE")) != 0 )
DUMA_OUTPUT_FILE = strdup(string);
/* Get Value for DUMA_SKIPCOUNT_INIT */
if ( (string = DUMA_GETENV("DUMA_SKIPCOUNT_INIT")) != 0 )
_duma_s.SKIPCOUNT_INIT = (atoi(string) != 0);
/* Get Value for DUMA_CHECK_FREQ */
if ( (string = DUMA_GETENV("DUMA_CHECK_FREQ")) != 0 )
{
int tmp = atoi(string);
if ( tmp > 0 )
_duma_s.CHECK_FREQ = tmp;
}
/* Should we send banner? */
if ( (string = DUMA_GETENV("DUMA_DISABLE_BANNER")) != 0 )
_duma_s.DISABLE_BANNER = (atoi(string) != 0);
if ( !_duma_s.DISABLE_BANNER )
DUMA_Print(version);
}
#include <signal.h>
static void sigsegv_handler(int signum) {
passert_failed(__FILE__, __LINE__, "\nDUMA: DUMA_ASSERT(%d) failed)\n", signum);
}
/* Function: duma_init
*
* duma_init sets configuration settings. Can sometimes cause problems
* when called from _duma_init.
*
* duma_init is called from _duma_init unless DUMA_EXPLICIT_INIT
* is defined at compile time.
*
* See Also: <_duma_init>
*/
#ifndef DUMA_EXPLICIT_INIT
static
#endif
void duma_init(void)
{
void * testAlloc;
DUMA_TLSVARS_T * duma_tls;
/* avoid double call, when initialization already in progress */
if ( _duma_s.init_state >= DUMAIS_IN_INIT && _duma_s.init_state <= DUMAIS_OUT_INIT )
return;
else
{
#if DUMA_DETOURS
_duma_init();
#endif
_duma_s.init_state = DUMAIS_IN_INIT;
}
duma_tls = GET_DUMA_TLSVARS();
duma_getenvvars( duma_tls );
// SIGSEGV callback setup
// So that failed tests show more info
// and validate on asserts
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_handler = sigsegv_handler;
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGBUS, &sa, NULL); // required for OSX
#if ( !defined(DUMA_NO_LEAKDETECTION) && ( defined(DUMA_PREFER_ATEXIT) || !defined(DUMA_GNU_INIT_ATTR) ) )
/*
* Register atexit()
* a) when we have Leak Detection and atexit() is preferred over GNU_INIT_ATTR
* b) when we have Leak Detection and GNU_INIT_ATTR is not set
*/
#ifndef DUMA_NO_HANG_MSG
if (0 == _duma_s.SUPPRESS_ATEXIT)
DUMA_Print("\nDUMA: Registering with atexit().\n"
#ifdef WIN32
"DUMA: If this hangs, change the library initialization order with DUMA_EXPLICIT_INIT.\n");
#else
"DUMA: If this hangs, change the library load/init order with DUMA_EXPLICIT_INIT or LD_PRELOAD.\n");
#endif
else
DUMA_Print("\nDUMA: Skipping registering with atexit(). Set DUMA_SUPPRESS_ATEXIT to 0 to register.\n");
#endif /* DUMA_NO_HANG_MSG */
if (!_duma_s.SUPPRESS_ATEXIT)
{
if ( atexit( _duma_exit ) )
DUMA_Abort("Cannot register exit function.\n");
#ifndef DUMA_NO_HANG_MSG
DUMA_Print("DUMA: Registration was successful.\n");
#endif /* DUMA_NO_HANG_MSG */
}
#endif /* ( !defined(DUMA_NO_LEAKDETECTION) && ( defined(DUMA_PREFER_ATEXIT) || !defined(DUMA_GNU_INIT_ATTR) ) ) */
/* initialize semaphoring */
DUMA_INIT_SEMAPHORE();
#ifndef DUMA_NO_GLOBAL_MALLOC_FREE
/*
* Check whether malloc and free is available
*/
testAlloc = malloc(123);
if (_duma_s.numAllocs == 0)
DUMA_Abort("malloc() is not bound to duma.\nDUMA Aborting: Preload lib with 'LD_PRELOAD=libduma.so <prog>'.\n");
free(testAlloc);
if (_duma_s.numDeallocs == 0)
DUMA_Abort("free() is not bound to duma.\nDUMA Aborting: Preload lib with 'LD_PRELOAD=libduma.so <prog>'.\n");
#endif
/* initialization finished */
_duma_s.init_state = DUMAIS_OUT_INIT;
}
/* Function: _duma_init
*
* _duma_init sets up the memory allocation arena and the run-time
* configuration information. We will call duma_init unless DUMA_EXPLICIT_INIT
* is defined at compile time.
*
* See Also: <duma_init>
*/
void
#ifdef DUMA_GNU_INIT_ATTR
__attribute ((constructor))
#endif
_duma_init(void)
{
size_t size = MEMORY_CREATION_SIZE;
struct _DUMA_Slot * slot;
int inRecursion = (_duma_s.init_state >= DUMAIS_IN_CONSTRUCTOR && _duma_s.init_state <= DUMAIS_OUT_INIT);
/* constuction already done? this should not happen! */
if (_duma_s.init_state >= DUMAIS_OUT_CONSTRUCTOR && _duma_s.init_state <= DUMAIS_OUT_INIT)
{
#ifndef DUMA_EXPLICIT_INIT
goto duma_constructor_callinit;
#else
return;
#endif
}
else
_duma_s.init_state = DUMAIS_IN_CONSTRUCTOR;
if ( DUMA_PAGE_SIZE != Page_Size() )
DUMA_Abort("DUMA_PAGE_SIZE is not correct. Run createconf and save results as duma_config.h");
if(!inRecursion)
DUMA_GET_SEMAPHORE();
/* call of DUMA_GET_SEMAPHORE() may already have done the construction recursively! */
if ( _duma_s.init_state >= DUMAIS_OUT_CONSTRUCTOR )
goto duma_constructor_relsem;
/*
* Allocate special memory for malloc() or C++ operator new, when size is 0
*/
_duma_s.null_block = Page_Create(2*DUMA_PAGE_SIZE, 1/*=exitonfail*/, 1/*=printerror*/);
Page_DenyAccess(_duma_s.null_block, 2*DUMA_PAGE_SIZE);
_duma_g.null_addr = (void*)( (DUMA_ADDR)_duma_s.null_block + DUMA_PAGE_SIZE );
/*
* Figure out how many Slot structures to allocate at one time.
*/
_duma_s.slotCount = _duma_s.slotsPerPage = DUMA_PAGE_SIZE / sizeof(struct _DUMA_Slot);
_duma_s.allocListSize = DUMA_PAGE_SIZE;
if ( size < _duma_s.allocListSize )
size = _duma_s.allocListSize;
size = ( size + DUMA_PAGE_SIZE -1 ) & ~( DUMA_PAGE_SIZE -1 );
/*
* Allocate memory, and break it up into two malloc buffers. The
* first buffer will be used for Slot structures, the second will
* be marked free.
*/
slot = _duma_g.allocList = (struct _DUMA_Slot *)Page_Create(size, 0/*=exitonfail*/, 0/*=printerror*/);
if ( 0 == _duma_g.allocList && 0L != _duma_s.PROTECT_FREE )
{
int reduce_more;
do
{
/* reduce as much protected memory as we need - or at least try so */
reduce_more = reduceProtectedMemory( (size+1023) >>10 );
/* simply try again */
slot = _duma_g.allocList = (struct _DUMA_Slot *)Page_Create( size, 0/*=exitonfail*/, 0/*= printerror*/ );
}
while ( reduce_more && 0 == _duma_g.allocList );
if ( 0 == _duma_g.allocList )
slot = _duma_g.allocList = (struct _DUMA_Slot *)Page_Create( size, 1/*=exitonfail*/, 1/*= printerror*/ );
}
memset((char *)_duma_g.allocList, 0, _duma_s.allocListSize);
/* enter _duma_g.allocList as slot to allow call to free() when doing allocateMoreSlots() */
slot[0].internalAddress = slot[0].userAddress = _duma_g.allocList;
slot[0].internalSize = slot[0].userSize = _duma_s.allocListSize;
slot[0].state = DUMAST_IN_USE;
slot[0].allocator = EFA_INT_ALLOC;
#ifndef DUMA_NO_LEAKDETECTION
slot[0].fileSource = DUMAFS_ALLOCATION;
slot[0].filename = __FILE__;
slot[0].lineno = __LINE__;
#endif
if ( size > _duma_s.allocListSize )
{
slot[1].internalAddress = slot[1].userAddress
= ((char *)slot[0].internalAddress) + slot[0].internalSize;
slot[1].internalSize = slot[1].userSize
= size - slot[0].internalSize;
slot[1].state = DUMAST_FREE;
slot[1].allocator = EFA_INT_ALLOC;
#ifndef DUMA_NO_LEAKDETECTION
slot[1].fileSource = DUMAFS_ALLOCATION;
slot[1].filename = __FILE__;
slot[1].lineno = __LINE__;
#endif
}
/*
* Deny access to the free page, so that we will detect any software
* that treads upon free memory.
*/
Page_DenyAccess(slot[1].internalAddress, slot[1].internalSize);
/*
* Account for the two slot structures that we've used.
*/
_duma_s.unUsedSlots = _duma_s.slotCount - 2;
/* construction done */
if ( _duma_s.init_state < DUMAIS_OUT_CONSTRUCTOR )
_duma_s.init_state = DUMAIS_OUT_CONSTRUCTOR;
duma_constructor_relsem:
/***********************/
if ( !inRecursion )
DUMA_RELEASE_SEMAPHORE(0);
#ifndef DUMA_EXPLICIT_INIT
duma_constructor_callinit:
/*************************/
if ( _duma_s.init_state < DUMAIS_OUT_INIT )
duma_init();
#elif 0
/* this output produces other problems !!! */
DUMA_Print("\nDUMA: This platform needs an explicit call of duma_init() (DUMA_EXPLICIT_INIT).");
DUMA_Print("\n Take care that duma_init() is called early in main()!\n\n");
#endif
}
/* Function: allocateMoreSlots
*
* allocateMoreSlots is called when there are only enough slot structures
* left to support the allocation of a single malloc buffer.
*
* See Also: <_duma_allocate>
*/
static void allocateMoreSlots(void)
{
size_t newSize = _duma_s.allocListSize + DUMA_PAGE_SIZE;
void * newAllocation;
void * oldAllocation = _duma_g.allocList;
#ifndef DUMA_NO_LEAKDETECTION
newAllocation = _duma_allocate( 1 /*=alignment*/
, newSize
, 0 /*=protectBelow*/
, -1 /*=fillByte*/
, 0 /*=protectAllocList*/
, EFA_INT_ALLOC
, DUMA_FAIL_NULL
, __FILE__, __LINE__
);
#else
newAllocation = _duma_allocate( 1 /*=alignment*/
, newSize
, 0 /*=protectBelow*/
, -1 /*=fillByte*/
, 0 /*=protectAllocList*/
, EFA_INT_ALLOC
, DUMA_FAIL_NULL
);
#endif
if ( ! newAllocation )
return;
memcpy(newAllocation, _duma_g.allocList, _duma_s.allocListSize);
memset(&(((char *)newAllocation)[_duma_s.allocListSize]), 0, DUMA_PAGE_SIZE);
_duma_g.allocList = (struct _DUMA_Slot *)newAllocation;
_duma_s.allocListSize = newSize;
_duma_s.slotCount += _duma_s.slotsPerPage;
_duma_s.unUsedSlots += _duma_s.slotsPerPage;
#ifndef DUMA_NO_LEAKDETECTION
_duma_deallocate( oldAllocation, 0 /*=protectAllocList*/, EFA_INT_DEALLOC, __FILE__, __LINE__ );
#else
_duma_deallocate( oldAllocation, 0 /*=protectAllocList*/, EFA_INT_DEALLOC);
#endif
}
/* Function: duma_alloc_return
*
* set your conditional breakpoint here to catch a specific allocation
*/
void * duma_alloc_return( void * address )
{
return address;
}
/* Function: _duma_allocate
*
* This is the memory allocator. When asked to allocate a buffer, allocate
* it in such a way that the end of the buffer is followed by an inaccessable
* memory page. If software overruns that buffer, it will touch the bad page
* and get an immediate segmentation fault. It's then easy to zero in on the
* offending code with a debugger.
*
* There are a few complications. If the user asks for an odd-sized buffer,
* we would have to have that buffer start on an odd address if the byte after
* the end of the buffer was to be on the inaccessable page. Unfortunately,
* there is lots of software that asks for odd-sized buffers and then
* requires that the returned address be word-aligned, or the size of the
* buffer be a multiple of the word size. An example are the string-processing
* functions on Sun systems, which do word references to the string memory
* and may refer to memory up to three bytes beyond the end of the string.
* For this reason, I take the alignment requests to memalign() and valloc()
* seriously, and
*
* DUMA wastes lots of memory.
*
* See Also: <_duma_deallocate>
*/
void * _duma_allocate(size_t alignment, size_t userSize, int protectBelow, int fillByte, int protectAllocList, enum _DUMA_Allocator allocator, enum _DUMA_FailReturn fail DUMA_PARAMLIST_FL)
{
size_t count;
struct _DUMA_Slot * slot;
struct _DUMA_Slot * fullSlot;
struct _DUMA_Slot * emptySlots[2];
DUMA_ADDR intAddr, userAddr, protAddr, endAddr;
size_t internalSize;
int allocationStrategy;
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
char stacktrace[601];
char* ptrStacktrace;
#endif
DUMA_TLSVARS_T * duma_tls = GET_DUMA_TLSVARS();
/* check allocation strategy to use */
switch ( _duma_allocDesc[allocator].std )
{
default:
case DUMAAS_C:
allocationStrategy = _duma_s.MALLOC_0_STRATEGY;
break;
case DUMAAS_CPP:
allocationStrategy = _duma_s.NEW_0_STRATEGY;
break;
}
DUMA_ASSERT( 0 != _duma_g.allocList );
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
/* When getting the stack trace memory will be allocated
* via DUMA. In situations were additional slots must
* be allocated we must do this prior to getting a pointer
* to the new empty slot. For this reason please leave
* this code at the top of this function.
*/
if(!_duma_s.DUMA_IN_DUMA && _duma_s.init_state && DUMA_OUTPUT_STACKTRACE)
{
_duma_s.DUMA_IN_DUMA = 1;
printStackTrace(stacktrace, sizeof(stacktrace), DUMA_OUTPUT_STACKTRACE_MAPFILE);
internalSize = strlen(stacktrace) * sizeof(char) + 1;
ptrStacktrace = (char*) LocalAlloc(NULL, internalSize);
strcpy(ptrStacktrace, stacktrace);
memset(stacktrace, 0, 600);
_duma_s.DUMA_IN_DUMA = 0;
}
#endif
/* initialize return value */
userAddr = 0;
/* count and show allocation, if requested */
_duma_s.numAllocs++;
if (_duma_s.SHOW_ALLOC)
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Print("\nDUMA: Allocating %d bytes at %s(%i).", (DUMA_SIZE)userSize, filename, lineno);
#else
DUMA_Print("\nDUMA: Allocating %d bytes.", (DUMA_SIZE)userSize);
#endif
if ( 0 == userSize )
DUMA_Print(" This is ANSI conform but probably a bug. See DUMA_ALLOW_MALLOC_0.");
}
/* check userSize */
if ( 0 == userSize )
{
#if 0
if ( !_duma_s.ALLOW_MALLOC_0 )
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("Allocating 0 bytes, probably a bug at %s(%i). See DUMA_ALLOW_MALLOC_0.", filename, lineno);
#else
DUMA_Abort("Allocating 0 bytes, probably a bug. See DUMA_ALLOW_MALLOC_0.");
#endif
}
else
{
if ( allocationStrategy )
userAddr = (DUMA_ADDR)_duma_g.null_addr;
return (void*)userAddr;
}
#else
switch ( allocationStrategy )
{
case 0: /* like having former ALLOW_MALLOC_0 = 0 ==> abort program with segfault */
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("Allocating 0 bytes, probably a bug at %s(%i). See DUMA_ALLOW_MALLOC_0.", filename, lineno);
#else
DUMA_Abort("Allocating 0 bytes, probably a bug. See DUMA_ALLOW_MALLOC_0.");
#endif
return (void*)userAddr;
break;
case 1: /* return NULL pointer */
return (void*)userAddr;
break;
case 2: /* return always the same pointer to some protected page */
default:
userAddr = (DUMA_ADDR)_duma_g.null_addr;
return (void*)userAddr;
break;
case 3: /* return unique protected page */
/* continue allocation! */
break;
} /* end switch () */
/* only case 3 */
internalSize = DUMA_PAGE_SIZE;
#endif
}
else /* if ( userSize ) */
{
/* check alignment */
if ( ! alignment )
{
DUMA_SIZE a = (DUMA_SIZE)duma_tls->ALIGNMENT;
DUMA_SIZE s = (DUMA_SIZE)userSize;
if ( s < a )
{
/* to next lower power of 2 */
for (a = s; a & (a-1); a &= a-1) ;
}
alignment = (size_t)a; /* this is new alignment */
}
if ( (int)alignment != ((int)alignment & -(int)alignment) )
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("Alignment (=%d) is not a power of 2 requested from %s(%i)", (DUMA_SIZE)alignment, filename, lineno);
#else
DUMA_Abort("Alignment (=%d) is not a power of 2", (DUMA_SIZE)alignment);
#endif
}
/*
* If protectBelow is set, all addresses returned by malloc()
* and company will be page-aligned.
*
* The internal size of the buffer is rounded up to the next alignment and page-size
* boundary, and then we add another page's worth of memory for the dead page.
*/
/* a bit tricky but no modulo and no if () */
internalSize = ( (userSize + DUMA_PAGE_SIZE -1) & ~(DUMA_PAGE_SIZE -1) ) + DUMA_PAGE_SIZE;
if ( alignment > DUMA_PAGE_SIZE )
internalSize += alignment - DUMA_PAGE_SIZE;
} /* end if ( userSize ) */
/*
* These will hold the addresses of two empty Slot structures, that
* can be used to hold information for any memory I create, and any
* memory that I mark free.
*/
fullSlot = emptySlots[0] = emptySlots[1] = 0;
/*
* The internal memory used by the allocator is currently
* inaccessable, so that errant programs won't scrawl on the
* allocator's arena. I'll un-protect it here so that I can make
* a new allocation. I'll re-protect it before I return.
*/
if ( protectAllocList )
{
IF__DUMA_INIT_DONE
DUMA_GET_SEMAPHORE();
Page_AllowAccess(_duma_g.allocList, _duma_s.allocListSize);
}
if ( _duma_s.CHECK_FREQ > 0 )
{
if ( (++ _duma_s.checkFreqCounter) == _duma_s.CHECK_FREQ )
{
_duma_check_all_slacks();
_duma_s.checkFreqCounter = 0;
}
}
/*
* If I'm running out of empty slots, create some more before
* I don't have enough slots left to make an allocation.
*/
if ( DUMAAT_INTERNAL != _duma_allocDesc[allocator].type && _duma_s.unUsedSlots < 7 )
allocateMoreSlots();
/*
* Iterate through all of the slot structures. Attempt to find a slot
* containing free memory of the exact right size. Accept a slot with
* more memory than we want, if the exact right size is not available.
* Find two slot structures that are not in use. We will need one if
* we split a buffer into free and allocated parts, and the second if
* we have to create new memory and mark it as free.
*
*/
for ( slot = _duma_g.allocList, count = _duma_s.slotCount ; count > 0; --count, ++slot )
{
/*
* Windows needs special treatment, cause Page_Delete() needs exactly
* the same memory region as Page_Create()!
* Thus as a quick hack no memory management is done by DUMA.
*/
#if !defined(WIN32)
if ( DUMAST_FREE == slot->state && slot->internalSize >= internalSize )
{
if ( !fullSlot || slot->internalSize < fullSlot->internalSize )
{
fullSlot = slot;
if ( slot->internalSize == internalSize )
break; /* All done; no empty slot needed in this case */
}
}
else
#endif
if ( DUMAST_EMPTY == slot->state )
{
if(!emptySlots[0])
emptySlots[0] = slot;
else if ( !emptySlots[1] )
emptySlots[1] = slot;
#if defined(WIN32)
break;
#endif
}
}
if ( !fullSlot )
{
/*
* I get here if I haven't been able to find a free buffer
* with all of the memory I need. I'll have to create more
* memory. I'll mark it all as free, and then split it into
* free and allocated portions later.
*/
size_t chunkSize;
long chunkSizekB;
#if defined(WIN32)
chunkSize = internalSize;
#else
chunkSize = MEMORY_CREATION_SIZE;
if ( chunkSize < internalSize )
chunkSize = internalSize;
chunkSize = ( chunkSize + DUMA_PAGE_SIZE -1 ) & ~( DUMA_PAGE_SIZE -1 );
#endif
chunkSizekB = (long)( (chunkSize+1023) >>10 );
/* Use up one of the empty slots to make the full slot. */
if ( !emptySlots[0] )
DUMA_Abort("Internal error in allocator: No empty slot 0.\n");
#if !defined(WIN32)
if ( !emptySlots[1] )
DUMA_Abort("Internal error in allocator: No empty slot 1.\n");
#endif
fullSlot = emptySlots[0];
emptySlots[0] = emptySlots[1];
/* reduce protected memory when we would exceed _duma_s.MAX_ALLOC */
if ( _duma_s.MAX_ALLOC > 0L && _duma_s.sumAllocatedMem + chunkSizekB > _duma_s.MAX_ALLOC )
reduceProtectedMemory( chunkSizekB );
fullSlot->internalAddress = Page_Create( chunkSize, 0/*= exitonfail*/, 0/*= printerror*/ );
if ( 0 == fullSlot->internalAddress && 0L != _duma_s.PROTECT_FREE )
{
int reduce_more;
do
{
/* reduce as much protected memory as we need - or at least try so */
reduce_more = reduceProtectedMemory( (chunkSize+1023) >>10 );
/* simply try again */
fullSlot->internalAddress = Page_Create( chunkSize, 0/*= exitonfail*/, 0/*= printerror*/ );
}
while ( reduce_more && 0 == fullSlot->internalAddress );
if ( 0 == fullSlot->internalAddress && DUMA_FAIL_ENV == fail )
fullSlot->internalAddress = Page_Create( chunkSize, _duma_s.MALLOC_FAILEXIT, 1/*= printerror*/ );
}
if ( fullSlot->internalAddress )
{
_duma_s.sumAllocatedMem += ( (chunkSize +1023) >>10 );
_duma_s.sumTotalAllocatedMem += ( (chunkSize +1023) >>10 );
fullSlot->internalSize = chunkSize;
fullSlot->state = DUMAST_FREE;
--_duma_s.unUsedSlots;
}
} /* end if ( !fullSlot ) */
if ( fullSlot->internalSize )
{
#if !defined(WIN32)
/*
* If the buffer I've found is larger than I need, split it into
* an allocated buffer with the exact amount of memory I need, and
* a free buffer containing the surplus memory.
*/
if ( fullSlot->internalSize > internalSize )
{
/* copy and adjust contents for free slot */
*emptySlots[0] = *fullSlot;
emptySlots[0]->internalAddress = (char *)emptySlots[0]->internalAddress + internalSize;
emptySlots[0]->internalSize -= internalSize;
emptySlots[0]->userAddress = emptySlots[0]->internalAddress;
emptySlots[0]->userSize = emptySlots[0]->internalSize;
/* adjust size of fullSlot */
fullSlot->internalSize = internalSize;
--_duma_s.unUsedSlots;
}
#endif
#if 0
#else
if ( 0 == userSize )
{
/*
* we need just a single page
* may deny any access to it
*
*/
/* Figure out what address to give the user: mid of protected page */
intAddr = (DUMA_ADDR)fullSlot->internalAddress;
endAddr = intAddr + internalSize;
userAddr = intAddr + (DUMA_PAGE_SIZE >> 1);
protAddr = intAddr;
/* Set up the "dead" page(s). */
Page_DenyAccess( (char*)protAddr, endAddr - protAddr );
}
else
#endif
if ( !protectBelow )
{
/*
* Arrange the buffer so that it is followed by an inaccessable
* memory page. A buffer overrun that touches that page will
* cause a segmentation fault.
* internalAddr <= userAddr < protectedAddr
*/
/* Figure out what address to give the user. */
intAddr = (DUMA_ADDR)fullSlot->internalAddress;
endAddr = intAddr + internalSize;
userAddr = ( intAddr + internalSize - DUMA_PAGE_SIZE - userSize ) & ~(alignment -1);
protAddr = ( userAddr + userSize + DUMA_PAGE_SIZE -1) & ~(DUMA_PAGE_SIZE -1);
/* DUMA_ASSERT(intAddr <= userAddr && intAddr < protAddr ); */
/* Set up the "live" page(s). */
Page_AllowAccess( (char*)intAddr, protAddr - intAddr );
/* Set up the "dead" page(s). */
Page_DenyAccess( (char*)protAddr, endAddr - protAddr );
}
else /* if (protectBelow) */
{
/*
* Arrange the buffer so that it is preceded by an inaccessable
* memory page. A buffer underrun that touches that page will
* cause a segmentation fault.
*/
/* Figure out what address to give the user. */
intAddr = (DUMA_ADDR)fullSlot->internalAddress;
endAddr = intAddr + internalSize;
userAddr = ( intAddr + DUMA_PAGE_SIZE + alignment -1) & ~(alignment -1);
protAddr = ( userAddr & ~(DUMA_PAGE_SIZE -1) ) - DUMA_PAGE_SIZE;
/* DUMA_ASSERT(intAddr < userAddr && intAddr <= protAddr ); */
/* Set up the "live" page(s). userAddr == protAddr + DUMA_PAGE_SIZE ! */
Page_AllowAccess( (char*)userAddr, internalSize - (userAddr - protAddr) );
/* Set up the "dead" page(s). */
Page_DenyAccess( (char*)intAddr, userAddr - intAddr );
}
/* => userAddress = internalAddress + DUMA_PAGE_SIZE */
fullSlot->userAddress = (char*)userAddr;
fullSlot->protAddress = (char*)protAddr;
fullSlot->userSize = userSize;
fullSlot->state = DUMAST_IN_USE;
fullSlot->allocator = allocator;
#ifndef DUMA_NO_LEAKDETECTION
fullSlot->fileSource = DUMAFS_ALLOCATION;
fullSlot->filename = (char*)filename;
#ifdef DUMA_EXPLICIT_INIT
/* mark allocations from standard libraries
* before duma_init() is finished with lineno = -1
* to allow special treatment in leak_checking
*/
fullSlot->lineno = (DUMAIS_OUT_INIT == _duma_s.init_state) ? lineno : -1;
#else
fullSlot->lineno = lineno;
#endif
#endif
/* initialise no mans land of slot */
_duma_init_slack( fullSlot );
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
if(!_duma_s.DUMA_IN_DUMA && _duma_s.init_state && DUMA_OUTPUT_STACKTRACE)
{
_duma_s.DUMA_IN_DUMA = 1;
/* Get stacktrace */
if(fullSlot->stacktrace)
LocalFree(fullSlot->stacktrace);
fullSlot->stacktrace = ptrStacktrace;
_duma_s.DUMA_IN_DUMA = 0;
}
else
fullSlot->stacktrace = 0;
#endif
} /* end if ( fullSlot->internalSize ) */
/*
* Make the pool's internal memory inaccessable, so that the program
* being debugged can't stomp on it.
*/
if ( protectAllocList )
{
Page_DenyAccess(_duma_g.allocList, _duma_s.allocListSize);
IF__DUMA_INIT_DONE
DUMA_RELEASE_SEMAPHORE(0);
}
/* Fill the memory if it was specified to do so. */
if ( ((char*)userAddr) && fillByte != -1 && userSize )
memset( (char*)userAddr, fillByte, userSize);
return duma_alloc_return( (char*)userAddr );
}
/* Function: _duma_deallocate
*
* Deallocate allocated memory after running some checks, then open
* slot for use. Uses Page_Delete to free the underlying memory.
*
* See Also: <Page_Delete> <_duma_allocate>
*/
void _duma_deallocate(void * address, int protectAllocList, enum _DUMA_Allocator allocator DUMA_PARAMLIST_FL)
{
struct _DUMA_Slot * slot;
long internalSizekB;
if ( 0 == _duma_g.allocList )
{
#ifdef DUMA_DETOURS
/* Odd things happen with detours sometimes... */
DUMA_Print("DUMA_Warning: free() called before first malloc().");
return;
#else
DUMA_Abort("free() called before first malloc().");
#endif
}
if ( 0 == address || _duma_g.null_addr == address )
return;
if ( protectAllocList )
{
IF__DUMA_INIT_DONE
DUMA_GET_SEMAPHORE();
Page_AllowAccess(_duma_g.allocList, _duma_s.allocListSize);
}
if ( _duma_s.CHECK_FREQ > 0 )
{
if ( (++ _duma_s.checkFreqCounter) == _duma_s.CHECK_FREQ )
{
_duma_check_all_slacks();
_duma_s.checkFreqCounter = 0;
}
}
if ( !(slot = slotForUserAddress(address)) )
{
if ( (slot = nearestSlotForUserAddress(address)) )
{
#ifndef DUMA_NO_LEAKDETECTION
if ( DUMAFS_ALLOCATION == slot->fileSource )
DUMA_Abort("free(%a): address not from DUMA or already freed. Address may be corrupted from %a allocated from %s(%i)",
(DUMA_ADDR)address, (DUMA_ADDR)slot->userAddress, slot->filename, slot->lineno);
else if ( DUMAFS_DEALLOCATION == slot->fileSource )
DUMA_Abort("free(%a): address not from DUMA or already freed. Address may be corrupted from %a deallocated at %s(%i)",
(DUMA_ADDR)address, (DUMA_ADDR)slot->userAddress, slot->filename, slot->lineno);
else
#endif
DUMA_Abort("free(%a): address not from DUMA or already freed. Address may be corrupted from %a.",
(DUMA_ADDR)address, (DUMA_ADDR)slot->userAddress);
}
else
{
#if DUMA_DETOURS
/* For Detours we need to not dump out, we get one extra free up front for some reason. */
DUMA_Print("DUMA_Warning: free(%a): address not from DUMA or already freed.", (DUMA_ADDR)address);
return;
#else
DUMA_Abort("free(%a): address not from DUMA or already freed.", (DUMA_ADDR)address);
#endif
}
}
if ( DUMAST_ALL_PROTECTED == slot->state || DUMAST_BEGIN_PROTECTED == slot->state )
{
#ifndef DUMA_NO_LEAKDETECTION
if ( DUMAFS_ALLOCATION == slot->fileSource )
DUMA_Abort("free(%a): memory already freed. allocated from %s(%i)",
(DUMA_ADDR)address, slot->filename, slot->lineno);
else if ( DUMAFS_DEALLOCATION == slot->fileSource )
DUMA_Abort("free(%a): memory already freed at %s(%i)",
(DUMA_ADDR)address, slot->filename, slot->lineno);
else
#endif
DUMA_Abort("free(%a): memory already freed.", (DUMA_ADDR)address);
}
else if ( _duma_allocDesc[slot->allocator].type != _duma_allocDesc[allocator].type )
{
#ifndef DUMA_NO_LEAKDETECTION
if ( DUMAFS_ALLOCATION == slot->fileSource )
/* 1 2 3 4 5 6 */
DUMA_Abort("Free mismatch: allocator '%s' used at %s(%i)\n but deallocator '%s' called at %s(%i)!",
_duma_allocDesc[slot->allocator].name, slot->filename, slot->lineno,
_duma_allocDesc[allocator].name, filename, lineno );
else if ( DUMAFS_DEALLOCATION == slot->fileSource )
/* 1 2 3 4 */
DUMA_Abort("Free mismatch: allocator '%s' used \nbut deallocator '%s' called at %s(%i)!",
_duma_allocDesc[slot->allocator].name,
_duma_allocDesc[allocator].name, filename, lineno );
else
#endif
DUMA_Abort("Free mismatch: allocator '%s' used but deallocator '%s' called!",
_duma_allocDesc[slot->allocator].name, _duma_allocDesc[allocator].name );
}
/* count and show deallocation, if requested */
_duma_s.numDeallocs++;
if (_duma_s.SHOW_ALLOC)
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Print("\nDUMA: Freeing %d bytes at %s(%i) (Allocated from %s(%i)).",
(DUMA_SIZE)slot->userSize, filename, lineno, slot->filename, slot->lineno);
#else
DUMA_Print("\nDUMA: Freeing %d bytes.", (DUMA_SIZE)slot->userSize);
#endif
/* CHECK INTEGRITY OF NO MANS LAND */
_duma_check_slack( slot );
if ( _duma_s.FREE_ACCESS )
{
volatile char *start = slot->userAddress;
volatile char *cur;
for (cur = (char*)slot->userAddress+slot->userSize; --cur >= start; )
{
char c = *cur;
*cur = c-1;
*cur = c;
}
}
internalSizekB = (slot->internalSize+1023) >>10;
/* protect memory, that nobody can access it */
/* Free as much protected memory, that we can protect this one */
/* is there need? and is there a way to free such much? */
if ( _duma_s.PROTECT_FREE > 0L
&& _duma_s.sumProtectedMem + internalSizekB > _duma_s.PROTECT_FREE
&& internalSizekB < _duma_s.PROTECT_FREE
&& _duma_s.sumProtectedMem >= internalSizekB)
{
reduceProtectedMemory( internalSizekB );
}
if (( EFA_INT_ALLOC != slot->allocator )
&& ( _duma_s.PROTECT_FREE < 0L
|| ( _duma_s.PROTECT_FREE > 0L
&& _duma_s.sumProtectedMem + internalSizekB <= _duma_s.PROTECT_FREE
) )
)
{
slot->state = DUMAST_ALL_PROTECTED;
Page_DenyAccess(slot->internalAddress, slot->internalSize);
_duma_s.sumProtectedMem += internalSizekB;
#ifndef DUMA_NO_LEAKDETECTION
if ( lineno )
{
slot->fileSource = DUMAFS_DEALLOCATION;
slot->filename = (char*)filename;
slot->lineno = lineno;
}
#endif
}
else
{
/* free all the memory */
Page_Delete(slot->internalAddress, slot->internalSize);
_duma_s.sumAllocatedMem -= internalSizekB;
/* free slot and userAddr */
slot->internalAddress = slot->userAddress = 0;
slot->internalSize = slot->userSize = 0;
slot->state = DUMAST_EMPTY;
slot->allocator = EFA_INT_ALLOC;
#ifndef DUMA_NO_LEAKDETECTION
slot->fileSource = DUMAFS_EMPTY;
slot->filename = 0;
slot->lineno = 0;
#endif
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
if(slot->stacktrace)
{
slot->stacktrace = 0;
LocalFree(slot->stacktrace);
}
#endif
}
if ( protectAllocList )
{
Page_DenyAccess(_duma_g.allocList, _duma_s.allocListSize);
IF__DUMA_INIT_DONE
DUMA_RELEASE_SEMAPHORE(0);
}
}
/* Function: duma_check
*
* Check No Mans Land of a memory block.
*
*/
void duma_check(void * address)
{
struct _DUMA_Slot * slot;
if ( 0 == address )
return;
IF__DUMA_INIT_DONE
DUMA_GET_SEMAPHORE();
Page_AllowAccess(_duma_g.allocList, _duma_s.allocListSize);
if ( !(slot = slotForUserAddress(address)) )
{
if ( (slot = nearestSlotForUserAddress(address)) )
{
#ifndef DUMA_NO_LEAKDETECTION
if ( DUMAFS_ALLOCATION == slot->fileSource )
DUMA_Abort("check(%a): address not from DUMA or already freed. Address may be corrupted from %a allocated from %s(%i)",
(DUMA_ADDR)address, (DUMA_ADDR)slot->userAddress, slot->filename, slot->lineno);
else if ( DUMAFS_DEALLOCATION == slot->fileSource )
DUMA_Abort("check(%a): address not from DUMA or already freed. Address may be corrupted from %a deallocated at %s(%i)",
(DUMA_ADDR)address, (DUMA_ADDR)slot->userAddress, slot->filename, slot->lineno);
else
#endif
DUMA_Abort("check(%a): address not from DUMA or already freed. Address may be corrupted from %a.",
(DUMA_ADDR)address, (DUMA_ADDR)slot->userAddress);
}
else
DUMA_Abort("check(%a): address not from DUMA or already freed.", (DUMA_ADDR)address);
}
if ( DUMAST_ALL_PROTECTED == slot->state || DUMAST_BEGIN_PROTECTED == slot->state )
{
#ifndef DUMA_NO_LEAKDETECTION
if ( DUMAFS_ALLOCATION == slot->fileSource )
DUMA_Abort("check(%a): memory already freed. allocated from %s(%i)",
(DUMA_ADDR)address, slot->filename, slot->lineno);
else if ( DUMAFS_DEALLOCATION == slot->fileSource )
DUMA_Abort("check(%a): memory already freed at %s(%i)",
(DUMA_ADDR)address, slot->filename, slot->lineno);
else
#endif
DUMA_Abort("check(%a): memory already freed.", (DUMA_ADDR)address);
}
/* CHECK INTEGRITY OF NO MANS LAND */
_duma_check_slack( slot );
Page_DenyAccess(_duma_g.allocList, _duma_s.allocListSize);
IF__DUMA_INIT_DONE
DUMA_RELEASE_SEMAPHORE(0);
}
/* Function: duma_checkAll
*
* Check No Mans Land of all memory blocks.
*
*/
void duma_checkAll()
{
IF__DUMA_INIT_DONE
DUMA_GET_SEMAPHORE();
Page_AllowAccess(_duma_g.allocList, _duma_s.allocListSize);
_duma_check_all_slacks();
Page_DenyAccess(_duma_g.allocList, _duma_s.allocListSize);
IF__DUMA_INIT_DONE
DUMA_RELEASE_SEMAPHORE(0);
}
/*********************************************************/
/* Function: _duma_malloc
*
* A version of malloc.
*/
void * _duma_malloc(size_t size DUMA_PARAMLIST_FL)
{
DUMA_TLSVARS_T * duma_tls;
if ( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
duma_tls = GET_DUMA_TLSVARS();
return _duma_allocate(0, size, duma_tls->PROTECT_BELOW,
duma_tls->FILL, 1 /*=protectAllocList*/, EFA_MALLOC,
DUMA_FAIL_ENV DUMA_PARAMS_FL);
}
/* Function: _duma_calloc
*
* A version of calloc.
*/
void * _duma_calloc(size_t nelem, size_t elsize DUMA_PARAMLIST_FL)
{
DUMA_TLSVARS_T * duma_tls;
if ( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
duma_tls = GET_DUMA_TLSVARS();
return _duma_allocate(0, nelem * elsize,
duma_tls->PROTECT_BELOW, 0 /*=fillByte*/,
1 /*=protectAllocList*/, EFA_CALLOC,
DUMA_FAIL_ENV DUMA_PARAMS_FL);
}
/* Function: _duma_free
*
* A version of free.
*/
void _duma_free(void * baseAdr DUMA_PARAMLIST_FL)
{
if ( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
_duma_deallocate(baseAdr, 1 /*=protectAllocList*/, EFA_FREE DUMA_PARAMS_FL);
}
/* Function: _duma_memalign
*
* A version of memalign.
*/
void * _duma_memalign(size_t alignment, size_t size DUMA_PARAMLIST_FL)
{
DUMA_TLSVARS_T * duma_tls;
if ( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
duma_tls = GET_DUMA_TLSVARS();
return _duma_allocate(alignment, size, duma_tls->PROTECT_BELOW,
duma_tls->FILL, 1 /*=protectAllocList*/, EFA_MEMALIGN,
DUMA_FAIL_ENV DUMA_PARAMS_FL);
}
/* Function: _duma_posix_memalign
*
* A version of posix_memalign.
*/
int _duma_posix_memalign(void **memptr, size_t alignment, size_t size DUMA_PARAMLIST_FL)
{
DUMA_TLSVARS_T * duma_tls;
void * retptr;
if ( (alignment & (alignment -1)) || alignment < sizeof(void *) )
return EINVAL;
if ( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
duma_tls = GET_DUMA_TLSVARS();
retptr = _duma_allocate(alignment, size, duma_tls->PROTECT_BELOW,
duma_tls->FILL, 1 /*=protectAllocList*/, EFA_POSIX_MEMALIGN,
DUMA_FAIL_ENV DUMA_PARAMS_FL);
if ( retptr )
{
(*(char**)memptr) = (char*)retptr;
return 0;
}
else
{
(*(char**)memptr) = NULL;
return ENOMEM;
}
}
/* Function: _duma_realloc
*
* A version of realloc that provides extra checks based on
* information we know about HEAP.
*/
void * _duma_realloc(void * oldBuffer, size_t newSize DUMA_PARAMLIST_FL)
{
void * ptr;
DUMA_TLSVARS_T * duma_tls;
if( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
duma_tls = GET_DUMA_TLSVARS();
IF__DUMA_INIT_DONE
DUMA_GET_SEMAPHORE();
Page_AllowAccess(_duma_g.allocList, _duma_s.allocListSize);
ptr = _duma_allocate(0, newSize, duma_tls->PROTECT_BELOW,
-1 /*=fillByte*/, 0 /*=protectAllocList*/, EFA_REALLOC,
DUMA_FAIL_ENV DUMA_PARAMS_FL);
if( ptr && oldBuffer )
{
struct _DUMA_Slot * slot = slotForUserAddress(oldBuffer);
if ( slot == 0 )
DUMA_Abort("realloc(%a, %d): address not from malloc().",
(DUMA_ADDR)oldBuffer, (DUMA_SIZE)newSize);
if ( newSize > slot->userSize )
{
memcpy( ptr, oldBuffer, slot->userSize );
memset( (char*)ptr + slot->userSize, 0, newSize - slot->userSize );
}
else if ( newSize > 0 )
memcpy(ptr, oldBuffer, newSize);
_duma_deallocate(oldBuffer, 0 /*=protectAllocList*/, EFA_REALLOC DUMA_PARAMS_FL);
}
Page_DenyAccess(_duma_g.allocList, _duma_s.allocListSize);
IF__DUMA_INIT_DONE
DUMA_RELEASE_SEMAPHORE(0);
return ptr;
}
/* Function: _duma_valloc
*
* A version of valloc.
*/
void * _duma_valloc(size_t size DUMA_PARAMLIST_FL)
{
DUMA_TLSVARS_T * duma_tls;
if ( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
duma_tls = GET_DUMA_TLSVARS();
return _duma_allocate(DUMA_PAGE_SIZE, size, duma_tls->PROTECT_BELOW,
duma_tls->FILL, 1 /*=protectAllocList*/, EFA_VALLOC,
DUMA_FAIL_ENV DUMA_PARAMS_FL);
}
/* Function: _duma_strdup
*
* A version of strdup.
*/
char * _duma_strdup(const char * str DUMA_PARAMLIST_FL)
{
size_t size;
char * dup;
DUMA_TLSVARS_T * duma_tls;
unsigned i;
if ( _duma_g.allocList == 0 )
_duma_init(); /* This sets DUMA_ALIGNMENT, DUMA_PROTECT_BELOW, DUMA_FILL, ... */
duma_tls = GET_DUMA_TLSVARS();
size = 0;
while (str[size])
++size;
dup = _duma_allocate(0, size +1, duma_tls->PROTECT_BELOW,
-1 /*=fillByte*/, 1 /*=protectAllocList*/, EFA_STRDUP,
DUMA_FAIL_ENV DUMA_PARAMS_FL);
if (dup) /* if successful */
for (i=0; i<=size; ++i) /* copy string */
dup[i] = str[i];
return dup;
}
/* Function: _duma_memcpy
*
* A version of memcpy that provides extra checks based on
* information we know about HEAP.
*
* Currently the only check we perform is overlapping memory
* regions. This should be expanded to include checking size
* of dest to verify assumptions.
*/
void * _duma_memcpy(void *dest, const void *src, size_t size DUMA_PARAMLIST_FL)
{
char * d = (char *)dest;
const char * s = (const char *)src;
unsigned i;
if ( (s < d && d < s + size) || (d < s && s < d + size) )
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("memcpy(%a, %a, %d): memory regions overlap at %s(%i)."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, (DUMA_SIZE)size, filename, lineno );
#else
DUMA_Abort("memcpy(%a, %a, %d): memory regions overlap."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, (DUMA_SIZE)size );
#endif
}
for (i=0; i<size; ++i)
d[i] = s[i];
return dest;
}
/* Function: _duma_strnlen
*
* like strlen() but maximum return value is size
*/
size_t _duma_strnlen(const char *src, size_t size)
{
size_t len;
for ( len =0; len < size && src[len]; ++len )
;
return len;
}
/* Function: _duma_strcpy
*
* A version of strcpy that provides extra checks based on
* information we know about HEAP.
*
* Currently the only check we perform is overlapping memory
* regions. This should be expanded to include checking size
* of dest to verify assumptions.
*/
char * _duma_strcpy(char *dest, const char *src DUMA_PARAMLIST_FL)
{
size_t i;
size_t size = strlen(src) +1;
if ( src < dest && dest < src + size )
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("strcpy(%a, %a): memory regions overlap at %s(%i)."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, filename, lineno );
#else
DUMA_Abort("strcpy(%a, %a): memory regions overlap."
, (DUMA_ADDR)dest, (DUMA_ADDR)src );
#endif
}
for (i=0; i<size; ++i)
dest[i] = src[i];
return dest;
}
/* Function: _duma_strncpy
*
* A version of strncpy that provides extra checks based on
* information we know about HEAP.
*
* Currently the only check we perform is overlapping memory
* regions. This should be expanded to include checking size
* of dest to verify assumptions.
*/
char * _duma_strncpy(char *dest, const char *src, size_t size DUMA_PARAMLIST_FL)
{
size_t i, srclen;
srclen = _duma_strnlen(src, size);
if ( size > 0 &&
( ( src < dest && dest < src + srclen )
||( dest < src && src < dest + size )
))
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("strncpy(%a, %a, %d): memory regions overlap at %s(%i)."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, (DUMA_SIZE)size, filename, lineno );
#else
DUMA_Abort("strncpy(%a, %a, %d): memory regions overlap."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, (DUMA_SIZE)size );
#endif
}
/* copy src to dest - up to size or zero terminator
* whatever happens first
*/
for (i =0; i < size && src[i]; ++i)
dest[i] = src[i];
/* fill rest with '\0' character */
for ( ; i<size; ++i)
dest[i] = 0;
return dest;
}
/* Function: _duma_strcat
*
* A version of strcat that provides extra checks based on
* information we know about HEAP.
*
* Currently the only check we perform is overlapping memory
* regions. This should be expanded to include checking size
* of dest to verify assumptions.
*/
char * _duma_strcat(char *dest, const char *src DUMA_PARAMLIST_FL)
{
unsigned i;
size_t destlen = strlen(dest);
size_t srcsize = strlen(src) + 1;
if ( src < dest +destlen && dest + destlen < src + srcsize )
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("strcat(%a, %a): memory regions overlap at %s(%i)."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, filename, lineno );
#else
DUMA_Abort("strcat(%a, %a): memory regions overlap."
, (DUMA_ADDR)dest, (DUMA_ADDR)src );
#endif
}
for (i=0; i<srcsize; ++i)
dest[destlen+i] = src[i];
return dest;
}
/* Function: _duma_strncat
*
* A version of strncat that provides extra checks based on
* information we know about HEAP.
*
* Currently the only check we perform is overlapping memory
* regions. This should be expanded to include checking size
* of dest to verify assumptions (like is size right).
*/
char * _duma_strncat(char *dest, const char *src, size_t size DUMA_PARAMLIST_FL)
{
unsigned i;
size_t destlen, srclen;
/* do nothing, when size not > 0 */
if ( size <= 0 )
return dest;
/* calculate number of characters to copy from src to dest */
destlen = strlen(dest);
srclen = _duma_strnlen(src, size);
/* CHECK: Verify memory regions do not overlap */
if ( src < (dest + destlen) && (dest + destlen) < (src + srclen + 1) )
{
#ifndef DUMA_NO_LEAKDETECTION
DUMA_Abort("strncat(%a, %a, %d): memory regions overlap at %s(%i)."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, (DUMA_SIZE)size, filename, lineno );
#else
DUMA_Abort("strncat(%a, %a, %d): memory regions overlap."
, (DUMA_ADDR)dest, (DUMA_ADDR)src, (DUMA_SIZE)size );
#endif
}
/* copy up to size characters from src to dest */
for (i=0; i<srclen; ++i)
dest[destlen+i] = src[i];
/* append single '\0' character */
dest[destlen+srclen] = 0;
return dest;
}
/*********************************************************/
#ifndef DUMA_NO_GLOBAL_MALLOC_FREE
/*
* define global functions for malloc(), free(), ..
*/
#ifdef _MSC_VER
/* define these functions as non-intrinsic */
#pragma function( memcpy, strcpy, strcat )
#endif
void * malloc(size_t size)
{
return _duma_malloc(size DUMA_PARAMS_UK);
}
void * calloc(size_t nelem, size_t elsize)
{
return _duma_calloc(nelem, elsize DUMA_PARAMS_UK);
}
void free(void * address)
{
_duma_free(address DUMA_PARAMS_UK);
}
void * memalign(size_t alignment, size_t size)
{
return _duma_memalign(alignment, size DUMA_PARAMS_UK);
}
int posix_memalign(void **memptr, size_t alignment, size_t size)
{
return _duma_posix_memalign(memptr, alignment, size DUMA_PARAMS_UK);
}
void * realloc(void * oldBuffer, size_t newSize)
{
return _duma_realloc(oldBuffer, newSize DUMA_PARAMS_UK);
}
void * valloc(size_t size)
{
return _duma_valloc(size DUMA_PARAMS_UK);
}
char * strdup(const char * str)
{
return _duma_strdup(str DUMA_PARAMS_UK);
}
void * memcpy(void *dest, const void *src, size_t size)
{
return _duma_memcpy(dest, src, size DUMA_PARAMS_UK);
}
char * strcpy(char *dest, const char *src)
{
return _duma_strcpy(dest, src DUMA_PARAMS_UK);
}
char * strncpy(char *dest, const char *src, size_t size)
{
return _duma_strncpy(dest, src, size DUMA_PARAMS_UK);
}
char * strcat(char *dest, const char *src)
{
return _duma_strcat(dest, src DUMA_PARAMS_UK);
}
char * strncat(char *dest, const char *src, size_t size)
{
return _duma_strncat(dest, src, size DUMA_PARAMS_UK);
}
#endif /* DUMA_NO_GLOBAL_MALLOC_FREE */
#ifndef DUMA_NO_LEAKDETECTION
/* Function DUMA_newFrame
*/
void DUMA_newFrame(void)
{
}
/* Function DUMA_delFrame
*
* Will output DUMA message for all in use frames along with totals.
* This method is called to when all memory should have been free'd by
* the application to locate memory leaks.
*/
void DUMA_delFrame(void)
{
struct _DUMA_Slot * slot = _duma_g.allocList;
size_t count = _duma_s.slotCount;
int nonFreedTotal = 0;
int nonFreedReported = 0;
int iExtraLeaks;
IF__DUMA_INIT_DONE
DUMA_GET_SEMAPHORE();
Page_AllowAccess(_duma_g.allocList, _duma_s.allocListSize);
for ( ; count > 0; --count, ++slot )
{
if ( DUMAST_IN_USE == slot->state
&& EFA_INT_ALLOC != slot->allocator
#ifdef DUMA_EXPLICIT_INIT
&& -1 != slot->lineno
#endif
)
{
if ( _duma_s.REPORT_ALL_LEAKS || slot->lineno > 0 )
{
#if defined(DUMA_DLL_LIBRARY) || defined(DUMA_SO_LIBRARY) || defined(DUMA_DETOURS)
DUMA_Print("\nDUMA: ptr=0x%a size=%d type='%s' not freed\n"
, (DUMA_ADDR)slot->userAddress, (DUMA_SIZE)slot->userSize
, _duma_allocDesc[slot->allocator].name
);
#else
DUMA_Print("\nDUMA: ptr=0x%a size=%d type='%s' alloced from %s(%i) not freed\n"
, (DUMA_ADDR)slot->userAddress, (DUMA_SIZE)slot->userSize
, _duma_allocDesc[slot->allocator].name
, slot->filename, slot->lineno
);
#endif
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
if(DUMA_OUTPUT_STACKTRACE)
DUMA_Print("Stacktrace of allocation:\n%s\n", slot->stacktrace);
#endif
++nonFreedReported;
}
++nonFreedTotal;
}
}
iExtraLeaks = nonFreedTotal - nonFreedReported;
if ( nonFreedReported )
DUMA_Abort("DUMA: Reported %i leaks. There are %i extra leaks without allocation information\n"
, nonFreedReported, iExtraLeaks
);
else if ( nonFreedReported < nonFreedTotal )
DUMA_Print("DUMA: Reported %i leaks. There are %i extra leaks without allocation information\n"
, nonFreedReported, iExtraLeaks
);
Page_DenyAccess(_duma_g.allocList, _duma_s.allocListSize);
IF__DUMA_INIT_DONE
DUMA_RELEASE_SEMAPHORE(0);
if (_duma_s.SHOW_ALLOC)
DUMA_Print("\nDUMA: Processed %l allocations and %l deallocations in total.\n", _duma_s.numAllocs, _duma_s.numDeallocs);
}
/* Function: _duma_exit
*
* DUMA's exit function, called atexit() or with GNU C Compiler's destructor attribute.
* This function also calls DUMA_delFrame to check for still in use memory and allert
* the user.
*/
void
#if ( defined(DUMA_GNU_INIT_ATTR) && !defined(DUMA_PREFER_ATEXIT) )
__attribute ((destructor))
#endif
_duma_exit(void)
{
#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__MINGW64__)
/* Cleanup memory owned by the stack library */
/* wouldn't do to leak memory :) */
StackTraceCleanup();
#endif
DUMA_delFrame();
}
#endif /* end ifndef DUMA_NO_LEAKDETECTION */
#endif /* ifndef DUMA_NO_DUMA */