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module: mbedtls: add shell module

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Add mbedTLS specific shell module, which allows (for now) to show heap
allocation statistics.

Signed-off-by: Marcin Niestroj <m.niestroj@emb.dev>
This commit is contained in:
Marcin Niestroj 2021-06-08 02:58:36 +02:00 • committed by Christopher Friedt
commit 84c5a469ab
3 changed files with 70 additions and 0 deletions
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2
modules/mbedtls/CMakeLists.txt
View file

@ -23,6 +23,8 @@ if(CONFIG_MBEDTLS_BUILTIN)
${mbedtls_sources}
)
zephyr_library_sources_ifdef(CONFIG_MBEDTLS_SHELL shell.c)
zephyr_library_app_memory(k_mbedtls_partition)
if(CONFIG_ARCH_POSIX AND CONFIG_ASAN AND NOT CONFIG_64BIT)
# i386 assembly code used in MBEDTLS does not compile with size optimization

8
modules/mbedtls/Kconfig
View file

@ -151,6 +151,14 @@ config MBEDTLS_HEAP_SIZE
be needed. For some dedicated and specific usage of mbedtls API, the
1000 bytes might be ok.
config MBEDTLS_SHELL
bool "mbed TLS shell"
depends on MBEDTLS
depends on SHELL
help
Enable mbed TLS shell module, which allows to show debug information
about mbed TLS library, such as heap usage.
config APP_LINK_WITH_MBEDTLS
bool "Link 'app' with MBEDTLS"
default y

60
modules/mbedtls/shell.c Normal file
View file

@ -0,0 +1,60 @@
/*
* Copyright (C) 2021 Marcin Niestroj
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <shell/shell.h>
#include <mbedtls/memory_buffer_alloc.h>
#if defined(MBEDTLS_MEMORY_DEBUG)
static int cmd_mbedtls_heap_details(const struct shell *sh, size_t argc,
char **argv)
{
mbedtls_memory_buffer_alloc_status();
return 0;
}
static int cmd_mbedtls_heap_max_reset(const struct shell *sh, size_t argc,
char **argv)
{
mbedtls_memory_buffer_alloc_max_reset();
return 0;
}
static int cmd_mbedtls_heap(const struct shell *sh, size_t argc, char **argv)
{
size_t max_used, max_blocks;
size_t cur_used, cur_blocks;
mbedtls_memory_buffer_alloc_max_get(&max_used, &max_blocks);
mbedtls_memory_buffer_alloc_cur_get(&cur_used, &cur_blocks);
shell_print(sh, "Maximum (peak): %zu bytes, %zu blocks",
max_used, max_blocks);
shell_print(sh, "Current: %zu bytes, %zu blocks",
cur_used, cur_blocks);
return 0;
}
SHELL_STATIC_SUBCMD_SET_CREATE(mbedtls_heap_cmds,
SHELL_CMD_ARG(details, NULL, "Print heap details",
cmd_mbedtls_heap_details, 1, 0),
SHELL_CMD_ARG(max_reset, NULL, "Reset max heap statistics",
cmd_mbedtls_heap_max_reset, 1, 0),
SHELL_SUBCMD_SET_END /* Array terminated. */
);
#endif
SHELL_STATIC_SUBCMD_SET_CREATE(mbedtls_cmds,
#if defined(MBEDTLS_MEMORY_DEBUG)
SHELL_CMD_ARG(heap, &mbedtls_heap_cmds, "Show heap status",
cmd_mbedtls_heap, 1, 0),
#endif
SHELL_SUBCMD_SET_END /* Array terminated. */
);
SHELL_CMD_REGISTER(mbedtls, &mbedtls_cmds, "mbed TLS commands", NULL);