blob: b527d9b66503a5245db6efd39330db23e4402485 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
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 */
|
