diff options
Diffstat (limited to 'vendor/mbedtls/memory_buffer_alloc.h')
| -rw-r--r-- | vendor/mbedtls/memory_buffer_alloc.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/vendor/mbedtls/memory_buffer_alloc.h b/vendor/mbedtls/memory_buffer_alloc.h new file mode 100644 index 0000000..b527d9b --- /dev/null +++ b/vendor/mbedtls/memory_buffer_alloc.h @@ -0,0 +1,142 @@ +/** + * \file memory_buffer_alloc.h + * + * \brief Buffer-based memory allocator + */ +/* + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later + */ +#ifndef MBEDTLS_MEMORY_BUFFER_ALLOC_H +#define MBEDTLS_MEMORY_BUFFER_ALLOC_H + +#include "mbedtls/build_info.h" + +#include <stddef.h> + +/** + * \name SECTION: Module settings + * + * The configuration options you can set for this module are in this section. + * Either change them in mbedtls_config.h or define them on the compiler command line. + * \{ + */ + +#if !defined(MBEDTLS_MEMORY_ALIGN_MULTIPLE) +#define MBEDTLS_MEMORY_ALIGN_MULTIPLE 4 /**< Align on multiples of this value */ +#endif + +/** \} name SECTION: Module settings */ + +#define MBEDTLS_MEMORY_VERIFY_NONE 0 +#define MBEDTLS_MEMORY_VERIFY_ALLOC (1 << 0) +#define MBEDTLS_MEMORY_VERIFY_FREE (1 << 1) +#define MBEDTLS_MEMORY_VERIFY_ALWAYS (MBEDTLS_MEMORY_VERIFY_ALLOC | \ + MBEDTLS_MEMORY_VERIFY_FREE) + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief Initialize use of stack-based memory allocator. + * The stack-based allocator does memory management inside the + * presented buffer and does not call calloc() and free(). + * It sets the global mbedtls_calloc() and mbedtls_free() pointers + * to its own functions. + * (Provided mbedtls_calloc() and mbedtls_free() are thread-safe if + * MBEDTLS_THREADING_C is defined) + * + * \note This code is not optimized and provides a straight-forward + * implementation of a stack-based memory allocator. + * + * \param buf buffer to use as heap + * \param len size of the buffer + */ +void mbedtls_memory_buffer_alloc_init(unsigned char *buf, size_t len); + +/** + * \brief Free the mutex for thread-safety and clear remaining memory + */ +void mbedtls_memory_buffer_alloc_free(void); + +/** + * \brief Determine when the allocator should automatically verify the state + * of the entire chain of headers / meta-data. + * (Default: MBEDTLS_MEMORY_VERIFY_NONE) + * + * \param verify One of MBEDTLS_MEMORY_VERIFY_NONE, MBEDTLS_MEMORY_VERIFY_ALLOC, + * MBEDTLS_MEMORY_VERIFY_FREE or MBEDTLS_MEMORY_VERIFY_ALWAYS + */ +void mbedtls_memory_buffer_set_verify(int verify); + +#if defined(MBEDTLS_MEMORY_DEBUG) +/** + * \brief Print out the status of the allocated memory (primarily for use + * after a program should have de-allocated all memory) + * Prints out a list of 'still allocated' blocks and their stack + * trace if MBEDTLS_MEMORY_BACKTRACE is defined. + */ +void mbedtls_memory_buffer_alloc_status(void); + +/** + * \brief Get the number of alloc/free so far. + * + * \param alloc_count Number of allocations. + * \param free_count Number of frees. + */ +void mbedtls_memory_buffer_alloc_count_get(size_t *alloc_count, size_t *free_count); + +/** + * \brief Get the peak heap usage so far + * + * \param max_used Peak number of bytes in use or committed. This + * includes bytes in allocated blocks too small to split + * into smaller blocks but larger than the requested size. + * \param max_blocks Peak number of blocks in use, including free and used + */ +void mbedtls_memory_buffer_alloc_max_get(size_t *max_used, size_t *max_blocks); + +/** + * \brief Reset peak statistics + */ +void mbedtls_memory_buffer_alloc_max_reset(void); + +/** + * \brief Get the current heap usage + * + * \param cur_used Current number of bytes in use or committed. This + * includes bytes in allocated blocks too small to split + * into smaller blocks but larger than the requested size. + * \param cur_blocks Current number of blocks in use, including free and used + */ +void mbedtls_memory_buffer_alloc_cur_get(size_t *cur_used, size_t *cur_blocks); +#endif /* MBEDTLS_MEMORY_DEBUG */ + +/** + * \brief Verifies that all headers in the memory buffer are correct + * and contain sane values. Helps debug buffer-overflow errors. + * + * Prints out first failure if MBEDTLS_MEMORY_DEBUG is defined. + * Prints out full header information if MBEDTLS_MEMORY_DEBUG + * is defined. (Includes stack trace information for each block if + * MBEDTLS_MEMORY_BACKTRACE is defined as well). + * + * \return 0 if verified, 1 otherwise + */ +int mbedtls_memory_buffer_alloc_verify(void); + +#if defined(MBEDTLS_SELF_TEST) +/** + * \brief Checkup routine + * + * \return 0 if successful, or 1 if a test failed + */ +int mbedtls_memory_buffer_alloc_self_test(int verbose); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* memory_buffer_alloc.h */ |