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platform/mbed_alloc_wrappers.cpp
- Committer:
- thedo
- Date:
- 2017-07-04
- Revision:
- 170:54ff26da7eb6
- Parent:
- 167:1657b442184c
File content as of revision 170:54ff26da7eb6:
/* mbed Microcontroller Library * Copyright (c) 2006-2016 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "platform/mbed_mem_trace.h" #include "platform/mbed_stats.h" #include "platform/mbed_toolchain.h" #include "platform/SingletonPtr.h" #include "platform/PlatformMutex.h" #include <stddef.h> #include <stdio.h> #include <string.h> #include <stdlib.h> /* There are two memory tracers in mbed OS: - the first can be used to detect the maximum heap usage at runtime. It is activated by defining the MBED_HEAP_STATS_ENABLED macro. - the second can be used to trace each memory call by automatically invoking a callback on each memory operation (see hal/api/mbed_mem_trace.h). It is activated by defining the MBED_MEM_TRACING_ENABLED macro. Both tracers can be activated and deactivated in any combination. If both tracers are active, the second one (MBED_MEM_TRACING_ENABLED) will trace the first one's (MBED_HEAP_STATS_ENABLED) memory calls.*/ /******************************************************************************/ /* Implementation of the runtime max heap usage checker */ /******************************************************************************/ /* Size must be a multiple of 8 to keep alignment */ typedef struct { uint32_t size; uint32_t pad; } alloc_info_t; #ifdef MBED_MEM_TRACING_ENABLED static SingletonPtr<PlatformMutex> mem_trace_mutex; #endif #ifdef MBED_HEAP_STATS_ENABLED static SingletonPtr<PlatformMutex> malloc_stats_mutex; static mbed_stats_heap_t heap_stats = {0, 0, 0, 0, 0}; #endif void mbed_stats_heap_get(mbed_stats_heap_t *stats) { #ifdef MBED_HEAP_STATS_ENABLED extern uint32_t mbed_heap_size; heap_stats.reserved_size = mbed_heap_size; malloc_stats_mutex->lock(); memcpy(stats, &heap_stats, sizeof(mbed_stats_heap_t)); malloc_stats_mutex->unlock(); #else memset(stats, 0, sizeof(mbed_stats_heap_t)); #endif } /******************************************************************************/ /* GCC memory allocation wrappers */ /******************************************************************************/ #if defined(TOOLCHAIN_GCC) #ifdef FEATURE_UVISOR #include "uvisor-lib/uvisor-lib.h" #endif/* FEATURE_UVISOR */ extern "C" { void * __real__malloc_r(struct _reent * r, size_t size); void * __real__memalign_r(struct _reent * r, size_t alignment, size_t bytes); void * __real__realloc_r(struct _reent * r, void * ptr, size_t size); void __real__free_r(struct _reent * r, void * ptr); void* __real__calloc_r(struct _reent * r, size_t nmemb, size_t size); } // TODO: memory tracing doesn't work with uVisor enabled. #if !defined(FEATURE_UVISOR) extern "C" void * __wrap__malloc_r(struct _reent * r, size_t size) { void *ptr = NULL; #ifdef MBED_HEAP_STATS_ENABLED malloc_stats_mutex->lock(); alloc_info_t *alloc_info = (alloc_info_t*)__real__malloc_r(r, size + sizeof(alloc_info_t)); if (alloc_info != NULL) { alloc_info->size = size; ptr = (void*)(alloc_info + 1); heap_stats.current_size += size; heap_stats.total_size += size; heap_stats.alloc_cnt += 1; if (heap_stats.current_size > heap_stats.max_size) { heap_stats.max_size = heap_stats.current_size; } } else { heap_stats.alloc_fail_cnt += 1; } malloc_stats_mutex->unlock(); #else // #ifdef MBED_HEAP_STATS_ENABLED ptr = __real__malloc_r(r, size); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_malloc(ptr, size, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED return ptr; } extern "C" void * __wrap__realloc_r(struct _reent * r, void * ptr, size_t size) { void *new_ptr = NULL; #ifdef MBED_HEAP_STATS_ENABLED // Implement realloc_r with malloc and free. // The function realloc_r can't be used here directly since // it can call into __wrap__malloc_r (returns ptr + 4) or // resize memory directly (returns ptr + 0). // Note - no lock needed since malloc and free are thread safe // Get old size uint32_t old_size = 0; if (ptr != NULL) { alloc_info_t *alloc_info = ((alloc_info_t*)ptr) - 1; old_size = alloc_info->size; } // Allocate space if (size != 0) { new_ptr = malloc(size); } // If the new buffer has been allocated copy the data to it // and free the old buffer if (new_ptr != NULL) { uint32_t copy_size = (old_size < size) ? old_size : size; memcpy(new_ptr, (void*)ptr, copy_size); free(ptr); } #else // #ifdef MBED_HEAP_STATS_ENABLED new_ptr = __real__realloc_r(r, ptr, size); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_realloc(new_ptr, ptr, size, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED return new_ptr; } extern "C" void __wrap__free_r(struct _reent * r, void * ptr) { #ifdef MBED_HEAP_STATS_ENABLED malloc_stats_mutex->lock(); alloc_info_t *alloc_info = NULL; if (ptr != NULL) { alloc_info = ((alloc_info_t*)ptr) - 1; heap_stats.current_size -= alloc_info->size; heap_stats.alloc_cnt -= 1; } __real__free_r(r, (void*)alloc_info); malloc_stats_mutex->unlock(); #else // #ifdef MBED_HEAP_STATS_ENABLED __real__free_r(r, ptr); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_free(ptr, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED } extern "C" void * __wrap__calloc_r(struct _reent * r, size_t nmemb, size_t size) { void *ptr = NULL; #ifdef MBED_HEAP_STATS_ENABLED // Note - no lock needed since malloc is thread safe ptr = malloc(nmemb * size); if (ptr != NULL) { memset(ptr, 0, nmemb * size); } #else // #ifdef MBED_HEAP_STATS_ENABLED ptr = __real__calloc_r(r, nmemb, size); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_calloc(ptr, nmemb, size, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED return ptr; } extern "C" void * __wrap__memalign_r(struct _reent * r, size_t alignment, size_t bytes) { return __real__memalign_r(r, alignment, bytes); } #endif // if !defined(FEATURE_UVISOR) /******************************************************************************/ /* ARMCC memory allocation wrappers */ /******************************************************************************/ #elif defined(TOOLCHAIN_ARM) // #if defined(TOOLCHAIN_GCC) /* Enable hooking of memory function only if tracing is also enabled */ #if defined(MBED_MEM_TRACING_ENABLED) || defined(MBED_HEAP_STATS_ENABLED) extern "C" { void *$Super$$malloc(size_t size); void *$Super$$realloc(void *ptr, size_t size); void *$Super$$calloc(size_t nmemb, size_t size); void $Super$$free(void *ptr); } extern "C" void* $Sub$$malloc(size_t size) { void *ptr = NULL; #ifdef MBED_HEAP_STATS_ENABLED malloc_stats_mutex->lock(); alloc_info_t *alloc_info = (alloc_info_t*)$Super$$malloc(size + sizeof(alloc_info_t)); if (alloc_info != NULL) { alloc_info->size = size; ptr = (void*)(alloc_info + 1); heap_stats.current_size += size; heap_stats.total_size += size; heap_stats.alloc_cnt += 1; if (heap_stats.current_size > heap_stats.max_size) { heap_stats.max_size = heap_stats.current_size; } } else { heap_stats.alloc_fail_cnt += 1; } malloc_stats_mutex->unlock(); #else // #ifdef MBED_HEAP_STATS_ENABLED ptr = $Super$$malloc(size); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_malloc(ptr, size, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED return ptr; } extern "C" void* $Sub$$realloc(void *ptr, size_t size) { void *new_ptr = NULL; #ifdef MBED_HEAP_STATS_ENABLED // Note - no lock needed since malloc and free are thread safe // Get old size uint32_t old_size = 0; if (ptr != NULL) { alloc_info_t *alloc_info = ((alloc_info_t*)ptr) - 1; old_size = alloc_info->size; } // Allocate space if (size != 0) { new_ptr = malloc(size); } // If the new buffer has been allocated copy the data to it // and free the old buffer if (new_ptr != NULL) { uint32_t copy_size = (old_size < size) ? old_size : size; memcpy(new_ptr, (void*)ptr, copy_size); free(ptr); } #else // #ifdef MBED_HEAP_STATS_ENABLED new_ptr = $Super$$realloc(ptr, size); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_realloc(new_ptr, ptr, size, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED return new_ptr; } extern "C" void *$Sub$$calloc(size_t nmemb, size_t size) { void *ptr = NULL; #ifdef MBED_HEAP_STATS_ENABLED // Note - no lock needed since malloc is thread safe ptr = malloc(nmemb * size); if (ptr != NULL) { memset(ptr, 0, nmemb * size); } #else // #ifdef MBED_HEAP_STATS_ENABLED ptr = $Super$$calloc(nmemb, size); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_calloc(ptr, nmemb, size, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED return ptr; } extern "C" void $Sub$$free(void *ptr) { #ifdef MBED_HEAP_STATS_ENABLED malloc_stats_mutex->lock(); alloc_info_t *alloc_info = NULL; if (ptr != NULL) { alloc_info = ((alloc_info_t*)ptr) - 1; heap_stats.current_size -= alloc_info->size; heap_stats.alloc_cnt -= 1; } $Super$$free((void*)alloc_info); malloc_stats_mutex->unlock(); #else // #ifdef MBED_HEAP_STATS_ENABLED $Super$$free(ptr); #endif // #ifdef MBED_HEAP_STATS_ENABLED #ifdef MBED_MEM_TRACING_ENABLED mem_trace_mutex->lock(); mbed_mem_trace_free(ptr, MBED_CALLER_ADDR()); mem_trace_mutex->unlock(); #endif // #ifdef MBED_MEM_TRACING_ENABLED } #endif // #if defined(MBED_MEM_TRACING_ENABLED) || defined(MBED_HEAP_STATS_ENABLED) /******************************************************************************/ /* Allocation wrappers for other toolchains are not supported yet */ /******************************************************************************/ #else // #if defined(TOOLCHAIN_GCC) #ifdef MBED_MEM_TRACING_ENABLED #warning Memory tracing is not supported with the current toolchain. #endif #ifdef MBED_HEAP_STATS_ENABLED #warning Heap statistics are not supported with the current toolchain. #endif #endif // #if defined(TOOLCHAIN_GCC)