Willie Solano / mbedtls-slave-prot-prod

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Dependents:   Slave-prot-prod

include/mbedtls/memory_buffer_alloc.h@1:1a219dea6cb5, 2019-06-04 (annotated)

Committer:
williequesada
Date:
Tue Jun 04 16:03:38 2019 +0000
Revision:
1:1a219dea6cb5
Parent:
0:cdf462088d13 
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markrad 0:cdf462088d13 1 /**
markrad 0:cdf462088d13 2 * \file memory_buffer_alloc.h
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * \brief Buffer-based memory allocator
markrad 0:cdf462088d13 5 *
markrad 0:cdf462088d13 6 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 7 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 8 *
markrad 0:cdf462088d13 9 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 10 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 11 * You may obtain a copy of the License at
markrad 0:cdf462088d13 12 *
markrad 0:cdf462088d13 13 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 14 *
markrad 0:cdf462088d13 15 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 16 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 17 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 18 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 19 * limitations under the License.
markrad 0:cdf462088d13 20 *
markrad 0:cdf462088d13 21 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 22 */
markrad 0:cdf462088d13 23 #ifndef MBEDTLS_MEMORY_BUFFER_ALLOC_H
markrad 0:cdf462088d13 24 #define MBEDTLS_MEMORY_BUFFER_ALLOC_H
markrad 0:cdf462088d13 25
markrad 0:cdf462088d13 26 #if !defined(MBEDTLS_CONFIG_FILE)
markrad 0:cdf462088d13 27 #include "config.h"
markrad 0:cdf462088d13 28 #else
markrad 0:cdf462088d13 29 #include MBEDTLS_CONFIG_FILE
markrad 0:cdf462088d13 30 #endif
markrad 0:cdf462088d13 31
markrad 0:cdf462088d13 32 #include <stddef.h>
markrad 0:cdf462088d13 33
markrad 0:cdf462088d13 34 /**
markrad 0:cdf462088d13 35 * \name SECTION: Module settings
markrad 0:cdf462088d13 36 *
markrad 0:cdf462088d13 37 * The configuration options you can set for this module are in this section.
markrad 0:cdf462088d13 38 * Either change them in config.h or define them on the compiler command line.
markrad 0:cdf462088d13 39 * \{
markrad 0:cdf462088d13 40 */
markrad 0:cdf462088d13 41
markrad 0:cdf462088d13 42 #if !defined(MBEDTLS_MEMORY_ALIGN_MULTIPLE)
markrad 0:cdf462088d13 43 #define MBEDTLS_MEMORY_ALIGN_MULTIPLE 4 /**< Align on multiples of this value */
markrad 0:cdf462088d13 44 #endif
markrad 0:cdf462088d13 45
markrad 0:cdf462088d13 46 /* \} name SECTION: Module settings */
markrad 0:cdf462088d13 47
markrad 0:cdf462088d13 48 #define MBEDTLS_MEMORY_VERIFY_NONE 0
markrad 0:cdf462088d13 49 #define MBEDTLS_MEMORY_VERIFY_ALLOC (1 << 0)
markrad 0:cdf462088d13 50 #define MBEDTLS_MEMORY_VERIFY_FREE (1 << 1)
markrad 0:cdf462088d13 51 #define MBEDTLS_MEMORY_VERIFY_ALWAYS (MBEDTLS_MEMORY_VERIFY_ALLOC | MBEDTLS_MEMORY_VERIFY_FREE)
markrad 0:cdf462088d13 52
markrad 0:cdf462088d13 53 #ifdef __cplusplus
markrad 0:cdf462088d13 54 extern "C" {
markrad 0:cdf462088d13 55 #endif
markrad 0:cdf462088d13 56
markrad 0:cdf462088d13 57 /**
markrad 0:cdf462088d13 58 * \brief Initialize use of stack-based memory allocator.
markrad 0:cdf462088d13 59 * The stack-based allocator does memory management inside the
markrad 0:cdf462088d13 60 * presented buffer and does not call calloc() and free().
markrad 0:cdf462088d13 61 * It sets the global mbedtls_calloc() and mbedtls_free() pointers
markrad 0:cdf462088d13 62 * to its own functions.
markrad 0:cdf462088d13 63 * (Provided mbedtls_calloc() and mbedtls_free() are thread-safe if
markrad 0:cdf462088d13 64 * MBEDTLS_THREADING_C is defined)
markrad 0:cdf462088d13 65 *
markrad 0:cdf462088d13 66 * \note This code is not optimized and provides a straight-forward
markrad 0:cdf462088d13 67 * implementation of a stack-based memory allocator.
markrad 0:cdf462088d13 68 *
markrad 0:cdf462088d13 69 * \param buf buffer to use as heap
markrad 0:cdf462088d13 70 * \param len size of the buffer
markrad 0:cdf462088d13 71 */
markrad 0:cdf462088d13 72 void mbedtls_memory_buffer_alloc_init( unsigned char *buf, size_t len );
markrad 0:cdf462088d13 73
markrad 0:cdf462088d13 74 /**
markrad 0:cdf462088d13 75 * \brief Free the mutex for thread-safety and clear remaining memory
markrad 0:cdf462088d13 76 */
markrad 0:cdf462088d13 77 void mbedtls_memory_buffer_alloc_free( void );
markrad 0:cdf462088d13 78
markrad 0:cdf462088d13 79 /**
markrad 0:cdf462088d13 80 * \brief Determine when the allocator should automatically verify the state
markrad 0:cdf462088d13 81 * of the entire chain of headers / meta-data.
markrad 0:cdf462088d13 82 * (Default: MBEDTLS_MEMORY_VERIFY_NONE)
markrad 0:cdf462088d13 83 *
markrad 0:cdf462088d13 84 * \param verify One of MBEDTLS_MEMORY_VERIFY_NONE, MBEDTLS_MEMORY_VERIFY_ALLOC,
markrad 0:cdf462088d13 85 * MBEDTLS_MEMORY_VERIFY_FREE or MBEDTLS_MEMORY_VERIFY_ALWAYS
markrad 0:cdf462088d13 86 */
markrad 0:cdf462088d13 87 void mbedtls_memory_buffer_set_verify( int verify );
markrad 0:cdf462088d13 88
markrad 0:cdf462088d13 89 #if defined(MBEDTLS_MEMORY_DEBUG)
markrad 0:cdf462088d13 90 /**
markrad 0:cdf462088d13 91 * \brief Print out the status of the allocated memory (primarily for use
markrad 0:cdf462088d13 92 * after a program should have de-allocated all memory)
markrad 0:cdf462088d13 93 * Prints out a list of 'still allocated' blocks and their stack
markrad 0:cdf462088d13 94 * trace if MBEDTLS_MEMORY_BACKTRACE is defined.
markrad 0:cdf462088d13 95 */
markrad 0:cdf462088d13 96 void mbedtls_memory_buffer_alloc_status( void );
markrad 0:cdf462088d13 97
markrad 0:cdf462088d13 98 /**
markrad 0:cdf462088d13 99 * \brief Get the peak heap usage so far
markrad 0:cdf462088d13 100 *
markrad 0:cdf462088d13 101 * \param max_used Peak number of bytes in use or committed. This
markrad 0:cdf462088d13 102 * includes bytes in allocated blocks too small to split
markrad 0:cdf462088d13 103 * into smaller blocks but larger than the requested size.
markrad 0:cdf462088d13 104 * \param max_blocks Peak number of blocks in use, including free and used
markrad 0:cdf462088d13 105 */
markrad 0:cdf462088d13 106 void mbedtls_memory_buffer_alloc_max_get( size_t *max_used, size_t *max_blocks );
markrad 0:cdf462088d13 107
markrad 0:cdf462088d13 108 /**
markrad 0:cdf462088d13 109 * \brief Reset peak statistics
markrad 0:cdf462088d13 110 */
markrad 0:cdf462088d13 111 void mbedtls_memory_buffer_alloc_max_reset( void );
markrad 0:cdf462088d13 112
markrad 0:cdf462088d13 113 /**
markrad 0:cdf462088d13 114 * \brief Get the current heap usage
markrad 0:cdf462088d13 115 *
markrad 0:cdf462088d13 116 * \param cur_used Current number of bytes in use or committed. This
markrad 0:cdf462088d13 117 * includes bytes in allocated blocks too small to split
markrad 0:cdf462088d13 118 * into smaller blocks but larger than the requested size.
markrad 0:cdf462088d13 119 * \param cur_blocks Current number of blocks in use, including free and used
markrad 0:cdf462088d13 120 */
markrad 0:cdf462088d13 121 void mbedtls_memory_buffer_alloc_cur_get( size_t *cur_used, size_t *cur_blocks );
markrad 0:cdf462088d13 122 #endif /* MBEDTLS_MEMORY_DEBUG */
markrad 0:cdf462088d13 123
markrad 0:cdf462088d13 124 /**
markrad 0:cdf462088d13 125 * \brief Verifies that all headers in the memory buffer are correct
markrad 0:cdf462088d13 126 * and contain sane values. Helps debug buffer-overflow errors.
markrad 0:cdf462088d13 127 *
markrad 0:cdf462088d13 128 * Prints out first failure if MBEDTLS_MEMORY_DEBUG is defined.
markrad 0:cdf462088d13 129 * Prints out full header information if MBEDTLS_MEMORY_DEBUG
markrad 0:cdf462088d13 130 * is defined. (Includes stack trace information for each block if
markrad 0:cdf462088d13 131 * MBEDTLS_MEMORY_BACKTRACE is defined as well).
markrad 0:cdf462088d13 132 *
markrad 0:cdf462088d13 133 * \return 0 if verified, 1 otherwise
markrad 0:cdf462088d13 134 */
markrad 0:cdf462088d13 135 int mbedtls_memory_buffer_alloc_verify( void );
markrad 0:cdf462088d13 136
markrad 0:cdf462088d13 137 #if defined(MBEDTLS_SELF_TEST)
markrad 0:cdf462088d13 138 /**
markrad 0:cdf462088d13 139 * \brief Checkup routine
markrad 0:cdf462088d13 140 *
markrad 0:cdf462088d13 141 * \return 0 if successful, or 1 if a test failed
markrad 0:cdf462088d13 142 */
markrad 0:cdf462088d13 143 int mbedtls_memory_buffer_alloc_self_test( int verbose );
markrad 0:cdf462088d13 144 #endif
markrad 0:cdf462088d13 145
markrad 0:cdf462088d13 146 #ifdef __cplusplus
markrad 0:cdf462088d13 147 }
markrad 0:cdf462088d13 148 #endif
markrad 0:cdf462088d13 149
markrad 0:cdf462088d13 150 #endif /* memory_buffer_alloc.h */