/* * SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #pragma once #include #include #include "multi_heap.h" #include #include "esp_err.h" #ifdef __cplusplus extern "C" { #endif /** * @brief Flags to indicate the capabilities of the various memory systems */ #define MALLOC_CAP_EXEC (1<<0) ///< Memory must be able to run executable code #define MALLOC_CAP_32BIT (1<<1) ///< Memory must allow for aligned 32-bit data accesses #define MALLOC_CAP_8BIT (1<<2) ///< Memory must allow for 8/16/...-bit data accesses #define MALLOC_CAP_DMA (1<<3) ///< Memory must be able to accessed by DMA #define MALLOC_CAP_PID2 (1<<4) ///< Memory must be mapped to PID2 memory space (PIDs are not currently used) #define MALLOC_CAP_PID3 (1<<5) ///< Memory must be mapped to PID3 memory space (PIDs are not currently used) #define MALLOC_CAP_PID4 (1<<6) ///< Memory must be mapped to PID4 memory space (PIDs are not currently used) #define MALLOC_CAP_PID5 (1<<7) ///< Memory must be mapped to PID5 memory space (PIDs are not currently used) #define MALLOC_CAP_PID6 (1<<8) ///< Memory must be mapped to PID6 memory space (PIDs are not currently used) #define MALLOC_CAP_PID7 (1<<9) ///< Memory must be mapped to PID7 memory space (PIDs are not currently used) #define MALLOC_CAP_SPIRAM (1<<10) ///< Memory must be in SPI RAM #define MALLOC_CAP_INTERNAL (1<<11) ///< Memory must be internal; specifically it should not disappear when flash/spiram cache is switched off #define MALLOC_CAP_DEFAULT (1<<12) ///< Memory can be returned in a non-capability-specific memory allocation (e.g. malloc(), calloc()) call #define MALLOC_CAP_IRAM_8BIT (1<<13) ///< Memory must be in IRAM and allow unaligned access #define MALLOC_CAP_RETENTION (1<<14) ///< Memory must be able to accessed by retention DMA #define MALLOC_CAP_RTCRAM (1<<15) ///< Memory must be in RTC fast memory #define MALLOC_CAP_INVALID (1<<31) ///< Memory can't be used / list end marker /** * @brief callback called when an allocation operation fails, if registered * @param size in bytes of failed allocation * @param caps capabilities requested of failed allocation * @param function_name function which generated the failure */ typedef void (*esp_alloc_failed_hook_t) (size_t size, uint32_t caps, const char * function_name); /** * @brief registers a callback function to be invoked if a memory allocation operation fails * @param callback caller defined callback to be invoked * @return ESP_OK if callback was registered. */ esp_err_t heap_caps_register_failed_alloc_callback(esp_alloc_failed_hook_t callback); /** * @brief Allocate a chunk of memory which has the given capabilities * * Equivalent semantics to libc malloc(), for capability-aware memory. * * @param size Size, in bytes, of the amount of memory to allocate * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory to be returned * * @return A pointer to the memory allocated on success, NULL on failure */ void *heap_caps_malloc(size_t size, uint32_t caps); /** * @brief Free memory previously allocated via heap_caps_malloc() or heap_caps_realloc(). * * Equivalent semantics to libc free(), for capability-aware memory. * * In IDF, ``free(p)`` is equivalent to ``heap_caps_free(p)``. * * @param ptr Pointer to memory previously returned from heap_caps_malloc() or heap_caps_realloc(). Can be NULL. */ void heap_caps_free( void *ptr); /** * @brief Reallocate memory previously allocated via heap_caps_malloc() or heap_caps_realloc(). * * Equivalent semantics to libc realloc(), for capability-aware memory. * * In IDF, ``realloc(p, s)`` is equivalent to ``heap_caps_realloc(p, s, MALLOC_CAP_8BIT)``. * * 'caps' parameter can be different to the capabilities that any original 'ptr' was allocated with. In this way, * realloc can be used to "move" a buffer if necessary to ensure it meets a new set of capabilities. * * @param ptr Pointer to previously allocated memory, or NULL for a new allocation. * @param size Size of the new buffer requested, or 0 to free the buffer. * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory desired for the new allocation. * * @return Pointer to a new buffer of size 'size' with capabilities 'caps', or NULL if allocation failed. */ void *heap_caps_realloc( void *ptr, size_t size, uint32_t caps); /** * @brief Allocate an aligned chunk of memory which has the given capabilities * * Equivalent semantics to libc aligned_alloc(), for capability-aware memory. * @param alignment How the pointer received needs to be aligned * must be a power of two * @param size Size, in bytes, of the amount of memory to allocate * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory to be returned * * @return A pointer to the memory allocated on success, NULL on failure * * */ void *heap_caps_aligned_alloc(size_t alignment, size_t size, uint32_t caps); /** * @brief Used to deallocate memory previously allocated with heap_caps_aligned_alloc * * @param ptr Pointer to the memory allocated * @note This function is deprecated, please consider using heap_caps_free() instead */ void __attribute__((deprecated)) heap_caps_aligned_free(void *ptr); /** * @brief Allocate an aligned chunk of memory which has the given capabilities. The initialized value in the memory is set to zero. * * @param alignment How the pointer received needs to be aligned * must be a power of two * @param n Number of continuing chunks of memory to allocate * @param size Size, in bytes, of a chunk of memory to allocate * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory to be returned * * @return A pointer to the memory allocated on success, NULL on failure * */ void *heap_caps_aligned_calloc(size_t alignment, size_t n, size_t size, uint32_t caps); /** * @brief Allocate a chunk of memory which has the given capabilities. The initialized value in the memory is set to zero. * * Equivalent semantics to libc calloc(), for capability-aware memory. * * In IDF, ``calloc(p)`` is equivalent to ``heap_caps_calloc(p, MALLOC_CAP_8BIT)``. * * @param n Number of continuing chunks of memory to allocate * @param size Size, in bytes, of a chunk of memory to allocate * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory to be returned * * @return A pointer to the memory allocated on success, NULL on failure */ void *heap_caps_calloc(size_t n, size_t size, uint32_t caps); /** * @brief Get the total size of all the regions that have the given capabilities * * This function takes all regions capable of having the given capabilities allocated in them * and adds up the total space they have. * * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory * * @return total size in bytes */ size_t heap_caps_get_total_size(uint32_t caps); /** * @brief Get the total free size of all the regions that have the given capabilities * * This function takes all regions capable of having the given capabilities allocated in them * and adds up the free space they have. * * @note Note that because of heap fragmentation it is probably not possible to allocate a single block of memory * of this size. Use heap_caps_get_largest_free_block() for this purpose. * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory * * @return Amount of free bytes in the regions */ size_t heap_caps_get_free_size( uint32_t caps ); /** * @brief Get the total minimum free memory of all regions with the given capabilities * * This adds all the low watermarks of the regions capable of delivering the memory * with the given capabilities. * * @note Note the result may be less than the global all-time minimum available heap of this kind, as "low watermarks" are * tracked per-region. Individual regions' heaps may have reached their "low watermarks" at different points in time. However, * this result still gives a "worst case" indication for all-time minimum free heap. * * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory * * @return Amount of free bytes in the regions */ size_t heap_caps_get_minimum_free_size( uint32_t caps ); /** * @brief Get the largest free block of memory able to be allocated with the given capabilities. * * Returns the largest value of ``s`` for which ``heap_caps_malloc(s, caps)`` will succeed. * * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory * * @return Size of the largest free block in bytes. */ size_t heap_caps_get_largest_free_block( uint32_t caps ); /** * @brief Get heap info for all regions with the given capabilities. * * Calls multi_heap_info() on all heaps which share the given capabilities. The information returned is an aggregate * across all matching heaps. The meanings of fields are the same as defined for multi_heap_info_t, except that * ``minimum_free_bytes`` has the same caveats described in heap_caps_get_minimum_free_size(). * * @param info Pointer to a structure which will be filled with relevant * heap metadata. * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory * */ void heap_caps_get_info( multi_heap_info_t *info, uint32_t caps ); /** * @brief Print a summary of all memory with the given capabilities. * * Calls multi_heap_info on all heaps which share the given capabilities, and * prints a two-line summary for each, then a total summary. * * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory * */ void heap_caps_print_heap_info( uint32_t caps ); /** * @brief Check integrity of all heap memory in the system. * * Calls multi_heap_check on all heaps. Optionally print errors if heaps are corrupt. * * Calling this function is equivalent to calling heap_caps_check_integrity * with the caps argument set to MALLOC_CAP_INVALID. * * @param print_errors Print specific errors if heap corruption is found. * * @return True if all heaps are valid, False if at least one heap is corrupt. */ bool heap_caps_check_integrity_all(bool print_errors); /** * @brief Check integrity of all heaps with the given capabilities. * * Calls multi_heap_check on all heaps which share the given capabilities. Optionally * print errors if the heaps are corrupt. * * See also heap_caps_check_integrity_all to check all heap memory * in the system and heap_caps_check_integrity_addr to check memory * around a single address. * * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory * @param print_errors Print specific errors if heap corruption is found. * * @return True if all heaps are valid, False if at least one heap is corrupt. */ bool heap_caps_check_integrity(uint32_t caps, bool print_errors); /** * @brief Check integrity of heap memory around a given address. * * This function can be used to check the integrity of a single region of heap memory, * which contains the given address. * * This can be useful if debugging heap integrity for corruption at a known address, * as it has a lower overhead than checking all heap regions. Note that if the corrupt * address moves around between runs (due to timing or other factors) then this approach * won't work, and you should call heap_caps_check_integrity or * heap_caps_check_integrity_all instead. * * @note The entire heap region around the address is checked, not only the adjacent * heap blocks. * * @param addr Address in memory. Check for corruption in region containing this address. * @param print_errors Print specific errors if heap corruption is found. * * @return True if the heap containing the specified address is valid, * False if at least one heap is corrupt or the address doesn't belong to a heap region. */ bool heap_caps_check_integrity_addr(intptr_t addr, bool print_errors); /** * @brief Enable malloc() in external memory and set limit below which * malloc() attempts are placed in internal memory. * * When external memory is in use, the allocation strategy is to initially try to * satisfy smaller allocation requests with internal memory and larger requests * with external memory. This sets the limit between the two, as well as generally * enabling allocation in external memory. * * @param limit Limit, in bytes. */ void heap_caps_malloc_extmem_enable(size_t limit); /** * @brief Allocate a chunk of memory as preference in decreasing order. * * @attention The variable parameters are bitwise OR of MALLOC_CAP_* flags indicating the type of memory. * This API prefers to allocate memory with the first parameter. If failed, allocate memory with * the next parameter. It will try in this order until allocating a chunk of memory successfully * or fail to allocate memories with any of the parameters. * * @param size Size, in bytes, of the amount of memory to allocate * @param num Number of variable parameters * * @return A pointer to the memory allocated on success, NULL on failure */ void *heap_caps_malloc_prefer( size_t size, size_t num, ... ); /** * @brief Reallocate a chunk of memory as preference in decreasing order. * * @param ptr Pointer to previously allocated memory, or NULL for a new allocation. * @param size Size of the new buffer requested, or 0 to free the buffer. * @param num Number of variable paramters * * @return Pointer to a new buffer of size 'size', or NULL if allocation failed. */ void *heap_caps_realloc_prefer( void *ptr, size_t size, size_t num, ... ); /** * @brief Allocate a chunk of memory as preference in decreasing order. * * @param n Number of continuing chunks of memory to allocate * @param size Size, in bytes, of a chunk of memory to allocate * @param num Number of variable paramters * * @return A pointer to the memory allocated on success, NULL on failure */ void *heap_caps_calloc_prefer( size_t n, size_t size, size_t num, ... ); /** * @brief Dump the full structure of all heaps with matching capabilities. * * Prints a large amount of output to serial (because of locking limitations, * the output bypasses stdout/stderr). For each (variable sized) block * in each matching heap, the following output is printed on a single line: * * - Block address (the data buffer returned by malloc is 4 bytes after this * if heap debugging is set to Basic, or 8 bytes otherwise). * - Data size (the data size may be larger than the size requested by malloc, * either due to heap fragmentation or because of heap debugging level). * - Address of next block in the heap. * - If the block is free, the address of the next free block is also printed. * * @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type * of memory */ void heap_caps_dump(uint32_t caps); /** * @brief Dump the full structure of all heaps. * * Covers all registered heaps. Prints a large amount of output to serial. * * Output is the same as for heap_caps_dump. * */ void heap_caps_dump_all(void); /** * @brief Return the size that a particular pointer was allocated with. * * @param ptr Pointer to currently allocated heap memory. Must be a pointer value previously * returned by heap_caps_malloc, malloc, calloc, etc. and not yet freed. * * @note The app will crash with an assertion failure if the pointer is not valid. * * @return Size of the memory allocated at this block. * */ size_t heap_caps_get_allocated_size( void *ptr ); #ifdef __cplusplus } #endif