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424 lines
12 KiB
C
424 lines
12 KiB
C
/* mem_track.h
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*
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* Copyright (C) 2006-2021 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/* The memory tracker overrides the wolfSSL memory callback system and uses a
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* static to track the total, peak and currently allocated bytes.
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*
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* If you are already using the memory callbacks then enabling this will
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* override the memory callbacks and prevent your memory callbacks from
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* working. This assumes malloc() and free() are available. Feel free to
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* customize this for your needs.
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* The enable this feature define the following:
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* #define USE_WOLFSSL_MEMORY
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* #define WOLFSSL_TRACK_MEMORY
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*
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* On startup call:
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* InitMemoryTracker();
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*
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* When ready to dump the memory report call:
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* ShowMemoryTracker();
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*
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* Report example:
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* total Allocs = 228
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* total Bytes = 93442
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* peak Bytes = 8840
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* current Bytes = 0
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*
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*
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* You can also:
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* #define WOLFSSL_DEBUG_MEMORY
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*
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* To print every alloc/free along with the function and line number.
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* Example output:
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* Alloc: 0x7fa14a500010 -> 120 at wc_InitRng:496
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* Free: 0x7fa14a500010 -> 120 at wc_FreeRng:606
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*/
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#ifndef WOLFSSL_MEM_TRACK_H
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#define WOLFSSL_MEM_TRACK_H
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#if defined(USE_WOLFSSL_MEMORY) && !defined(WOLFSSL_STATIC_MEMORY)
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#include "wolfssl/wolfcrypt/logging.h"
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#if defined(WOLFSSL_TRACK_MEMORY)
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#define DO_MEM_STATS
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#if defined(__linux__) || defined(__MACH__)
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#define DO_MEM_LIST
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#endif
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#endif
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typedef struct memoryStats {
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long totalAllocs; /* number of allocations */
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long totalDeallocs; /* number of deallocations */
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long totalBytes; /* total number of bytes allocated */
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long peakBytes; /* concurrent max bytes */
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long currentBytes; /* total current bytes in use */
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#ifdef WOLFSSL_TRACK_MEMORY_VERBOSE
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long peakAllocsTripOdometer; /* peak number of concurrent allocations,
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* subject to reset by
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* wolfCrypt_heap_peak_checkpoint()
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*/
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long peakBytesTripOdometer; /* peak concurrent bytes, subject to reset
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* by wolfCrypt_heap_peak_checkpoint()
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*/
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#endif
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} memoryStats;
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typedef struct memHint {
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size_t thisSize; /* size of this memory */
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#ifdef DO_MEM_LIST
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struct memHint* next;
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struct memHint* prev;
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#ifdef WOLFSSL_DEBUG_MEMORY
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const char* func;
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unsigned int line;
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#endif
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#endif
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void* thisMemory; /* actual memory for user */
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} memHint;
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typedef struct memoryTrack {
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union {
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memHint hint;
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byte alignit[sizeof(memHint) + ((16-1) & ~(16-1))]; /* make sure we have strong alignment */
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} u;
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} memoryTrack;
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#ifdef DO_MEM_LIST
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/* track allocations and report at end */
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typedef struct memoryList {
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memHint* head;
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memHint* tail;
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word32 count;
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} memoryList;
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#endif
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#if defined(WOLFSSL_TRACK_MEMORY)
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static memoryStats ourMemStats;
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#ifdef DO_MEM_LIST
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#include <pthread.h>
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static memoryList ourMemList;
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static pthread_mutex_t memLock = PTHREAD_MUTEX_INITIALIZER;
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#endif
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#endif
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/* if defined to not using inline then declare function prototypes */
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#ifdef NO_INLINE
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#define WC_STATIC
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#ifdef WOLFSSL_DEBUG_MEMORY
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WOLFSSL_LOCAL void* TrackMalloc(size_t sz, const char* func, unsigned int line);
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WOLFSSL_LOCAL void TrackFree(void* ptr, const char* func, unsigned int line);
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WOLFSSL_LOCAL void* TrackRealloc(void* ptr, size_t sz, const char* func, unsigned int line);
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#else
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WOLFSSL_LOCAL void* TrackMalloc(size_t sz);
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WOLFSSL_LOCAL void TrackFree(void* ptr);
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WOLFSSL_LOCAL void* TrackRealloc(void* ptr, size_t sz);
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#endif
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WOLFSSL_LOCAL int InitMemoryTracker(void);
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WOLFSSL_LOCAL void ShowMemoryTracker(void);
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#else
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#define WC_STATIC static
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#endif
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#ifdef WOLFSSL_DEBUG_MEMORY
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WC_STATIC WC_INLINE void* TrackMalloc(size_t sz, const char* func, unsigned int line)
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#else
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WC_STATIC WC_INLINE void* TrackMalloc(size_t sz)
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#endif
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{
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memoryTrack* mt;
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memHint* header;
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if (sz == 0)
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return NULL;
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mt = (memoryTrack*)malloc(sizeof(memoryTrack) + sz);
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if (mt == NULL)
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return NULL;
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header = &mt->u.hint;
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header->thisSize = sz;
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header->thisMemory = (byte*)mt + sizeof(memoryTrack);
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#ifdef WOLFSSL_DEBUG_MEMORY
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#ifdef WOLFSSL_DEBUG_MEMORY_PRINT
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printf("Alloc: %p -> %u at %s:%d\n", header->thisMemory, (word32)sz, func, line);
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#else
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(void)func;
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(void)line;
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#endif
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#endif
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#ifdef DO_MEM_STATS
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ourMemStats.totalAllocs++;
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ourMemStats.totalBytes += sz;
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ourMemStats.currentBytes += sz;
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#ifdef WOLFSSL_TRACK_MEMORY_VERBOSE
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if (ourMemStats.peakAllocsTripOdometer < ourMemStats.totalAllocs - ourMemStats.totalDeallocs)
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ourMemStats.peakAllocsTripOdometer = ourMemStats.totalAllocs - ourMemStats.totalDeallocs;
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if (ourMemStats.peakBytesTripOdometer < ourMemStats.currentBytes) {
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ourMemStats.peakBytesTripOdometer = ourMemStats.currentBytes;
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#endif
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if (ourMemStats.currentBytes > ourMemStats.peakBytes)
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ourMemStats.peakBytes = ourMemStats.currentBytes;
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#ifdef WOLFSSL_TRACK_MEMORY_VERBOSE
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}
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#endif
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#endif
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#ifdef DO_MEM_LIST
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if (pthread_mutex_lock(&memLock) == 0) {
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#ifdef WOLFSSL_DEBUG_MEMORY
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header->func = func;
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header->line = line;
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#endif
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/* Setup event */
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header->next = NULL;
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if (ourMemList.tail == NULL) {
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ourMemList.head = header;
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header->prev = NULL;
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}
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else {
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ourMemList.tail->next = header;
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header->prev = ourMemList.tail;
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}
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ourMemList.tail = header; /* add to the end either way */
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ourMemList.count++;
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pthread_mutex_unlock(&memLock);
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}
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#endif
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return header->thisMemory;
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}
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#ifdef WOLFSSL_DEBUG_MEMORY
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WC_STATIC WC_INLINE void TrackFree(void* ptr, const char* func, unsigned int line)
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#else
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WC_STATIC WC_INLINE void TrackFree(void* ptr)
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#endif
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{
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memoryTrack* mt;
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memHint* header;
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size_t sz;
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if (ptr == NULL) {
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return;
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}
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mt = (memoryTrack*)((byte*)ptr - sizeof(memoryTrack));
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header = &mt->u.hint;
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sz = header->thisSize;
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#ifdef DO_MEM_LIST
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if (pthread_mutex_lock(&memLock) == 0)
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{
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#endif
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#ifdef DO_MEM_STATS
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ourMemStats.currentBytes -= header->thisSize;
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ourMemStats.totalDeallocs++;
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#endif
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#ifdef DO_MEM_LIST
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if (header == ourMemList.head && header == ourMemList.tail) {
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ourMemList.head = NULL;
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ourMemList.tail = NULL;
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}
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else if (header == ourMemList.head) {
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ourMemList.head = header->next;
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ourMemList.head->prev = NULL;
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}
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else if (header == ourMemList.tail) {
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ourMemList.tail = header->prev;
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ourMemList.tail->next = NULL;
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}
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else {
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memHint* next = header->next;
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memHint* prev = header->prev;
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if (next)
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next->prev = prev;
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if (prev)
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prev->next = next;
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}
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ourMemList.count--;
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pthread_mutex_unlock(&memLock);
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}
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#endif
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#ifdef WOLFSSL_DEBUG_MEMORY
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#ifdef WOLFSSL_DEBUG_MEMORY_PRINT
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printf("Free: %p -> %u at %s:%d\n", ptr, (word32)sz, func, line);
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#else
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(void)func;
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(void)line;
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#endif
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#endif
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(void)sz;
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free(mt);
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}
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#ifdef WOLFSSL_DEBUG_MEMORY
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WC_STATIC WC_INLINE void* TrackRealloc(void* ptr, size_t sz, const char* func, unsigned int line)
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#else
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WC_STATIC WC_INLINE void* TrackRealloc(void* ptr, size_t sz)
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#endif
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{
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#ifdef WOLFSSL_DEBUG_MEMORY
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void* ret = TrackMalloc(sz, func, line);
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#else
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void* ret = TrackMalloc(sz);
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#endif
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if (ptr) {
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/* if realloc is bigger, don't overread old ptr */
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memoryTrack* mt;
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memHint* header;
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mt = (memoryTrack*)((byte*)ptr - sizeof(memoryTrack));
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header = &mt->u.hint;
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if (header->thisSize < sz)
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sz = header->thisSize;
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}
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if (ret && ptr)
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XMEMCPY(ret, ptr, sz);
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if (ret) {
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#ifdef WOLFSSL_DEBUG_MEMORY
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TrackFree(ptr, func, line);
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#else
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TrackFree(ptr);
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#endif
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}
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return ret;
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}
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#ifdef WOLFSSL_TRACK_MEMORY
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static wolfSSL_Malloc_cb mfDefault = NULL;
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static wolfSSL_Free_cb ffDefault = NULL;
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static wolfSSL_Realloc_cb rfDefault = NULL;
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WC_STATIC WC_INLINE int InitMemoryTracker(void)
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{
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int ret;
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ret = wolfSSL_GetAllocators(&mfDefault, &ffDefault, &rfDefault);
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if (ret < 0) {
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printf("wolfSSL GetAllocators failed to get the defaults\n");
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}
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ret = wolfSSL_SetAllocators(TrackMalloc, TrackFree, TrackRealloc);
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if (ret < 0) {
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printf("wolfSSL SetAllocators failed for track memory\n");
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return ret;
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}
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#ifdef DO_MEM_LIST
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if (pthread_mutex_lock(&memLock) == 0)
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{
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#endif
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#ifdef DO_MEM_STATS
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ourMemStats.totalAllocs = 0;
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ourMemStats.totalDeallocs = 0;
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ourMemStats.totalBytes = 0;
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ourMemStats.peakBytes = 0;
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ourMemStats.currentBytes = 0;
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#ifdef WOLFSSL_TRACK_MEMORY_VERBOSE
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ourMemStats.peakAllocsTripOdometer = 0;
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ourMemStats.peakBytesTripOdometer = 0;
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#endif
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#endif
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#ifdef DO_MEM_LIST
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XMEMSET(&ourMemList, 0, sizeof(ourMemList));
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pthread_mutex_unlock(&memLock);
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}
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#endif
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return ret;
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}
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WC_STATIC WC_INLINE void ShowMemoryTracker(void)
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{
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#ifdef DO_MEM_LIST
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if (pthread_mutex_lock(&memLock) == 0)
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{
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#endif
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#ifdef DO_MEM_STATS
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printf("total Allocs = %9ld\n", ourMemStats.totalAllocs);
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printf("total Deallocs = %9ld\n", ourMemStats.totalDeallocs);
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printf("total Bytes = %9ld\n", ourMemStats.totalBytes);
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printf("peak Bytes = %9ld\n", ourMemStats.peakBytes);
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printf("current Bytes = %9ld\n", ourMemStats.currentBytes);
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#endif
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#ifdef DO_MEM_LIST
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if (ourMemList.count > 0) {
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/* print list of allocations */
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memHint* header;
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for (header = ourMemList.head; header != NULL; header = header->next) {
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printf("Leak: Ptr %p, Size %u"
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#ifdef WOLFSSL_DEBUG_MEMORY
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", Func %s, Line %d"
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#endif
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"\n",
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(byte*)header + sizeof(memHint), (unsigned int)header->thisSize
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#ifdef WOLFSSL_DEBUG_MEMORY
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, header->func, header->line
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#endif
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);
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}
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}
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pthread_mutex_unlock(&memLock);
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}
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#endif
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}
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WC_STATIC WC_INLINE int CleanupMemoryTracker(void)
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{
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/* restore default allocators */
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return wolfSSL_SetAllocators(mfDefault, ffDefault, rfDefault);
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}
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#endif
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#endif /* USE_WOLFSSL_MEMORY */
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#endif /* WOLFSSL_MEM_TRACK_H */
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