switch to freeRtos malloc + improve malloc_safe utils, fixed memleak

FreeRTOSConfig.h

@@ -95,7 +95,7 @@
 
 #define configUSE_PREEMPTION                     1
 #define configSUPPORT_STATIC_ALLOCATION          1
-#define configSUPPORT_DYNAMIC_ALLOCATION         0
+#define configSUPPORT_DYNAMIC_ALLOCATION         1
 #define configUSE_IDLE_HOOK                      0
 #define configUSE_TICK_HOOK                      0
 #define configCPU_CLOCK_HZ                       ( SystemCoreClock )
@@ -109,6 +109,8 @@
 #define configCHECK_FOR_STACK_OVERFLOW           2
 #define configENABLE_BACKWARD_COMPATIBILITY      0
 
+#define configTOTAL_HEAP_SIZE 4096
+
 /* Co-routine definitions. */
 #define configUSE_CO_ROUTINES                    0
 #define configMAX_CO_ROUTINE_PRIORITIES          ( 2 )

comm/messages.c

@@ -2,13 +2,14 @@
 // Created by MightyPork on 2017/11/21.
 //
 
-#include <framework/system_settings.h>
 #include "platform.h"
 #include "framework/settings.h"
 #include "utils/ini_parser.h"
 #include "TinyFrame.h"
 #include "framework/unit_registry.h"
 #include "comm/messages.h"
+#include "framework/system_settings.h"
+#include "utils/malloc_safe.h"
 
 static TinyFrame tf_;
 TinyFrame *comm = &tf_;
@@ -61,7 +62,7 @@ static void settings_bulkread_cb(BulkRead *bulk, uint32_t chunk, uint8_t *buffer
 {
     // clean-up request
     if (buffer == NULL) {
-        free(bulk);
+        free_ck(bulk);
         iw_end();
         dbg("INI read complete.");
         return;
@@ -80,8 +81,8 @@ static TF_Result lst_ini_export(TinyFrame *tf, TF_Msg *msg)
 {
     dbg("Bulk read INI file");
 
-    BulkRead *bulk = malloc(sizeof(BulkRead));
+    BulkRead *bulk = malloc_ck(sizeof(BulkRead));
-    assert_param(bulk);
+    assert_param(bulk != NULL);
 
     bulk->frame_id = msg->frame_id;
     bulk->len = iw_measure_total(settings_build_units_ini);
@@ -115,7 +116,7 @@ static void settings_bulkwrite_cb(BulkWrite *bulk, const uint8_t *chunk, uint32_
             dbg("INI write failed");
         }
 
-        free(bulk);
+        free_ck(bulk);
         return;
     }
 
@@ -129,7 +130,7 @@ static TF_Result lst_ini_import(TinyFrame *tf, TF_Msg *msg)
 {
     dbg("Bulk write INI file");
 
-    BulkWrite *bulk = malloc(sizeof(BulkWrite));
+    BulkWrite *bulk = malloc_ck(sizeof(BulkWrite));
     assert_param(bulk);
 
     bulk->frame_id = msg->frame_id;

cortex_handlers.c

@@ -206,5 +206,31 @@ void  __attribute__((naked)) HardFault_Handler(void)
     while (1);
 }
 
+#if 0
+char *heap_end = 0;
+caddr_t _sbrk(int incr) {
+    extern char _end; // this is the end of bbs, defined in LD
+    extern char _estack; // this is the end of the allocable memory - defined in LD. Top level stack lives here.
+    char *prev_heap_end;
+
+    if (heap_end == 0) {
+        heap_end = &_end;
+    }
+    prev_heap_end = heap_end;
+
+    if (heap_end + incr > &_estack) {
+        /* Heap and stack collision */
+        dbg("\r\nOUT OF MEMORY");
+        return (char*)-1;
+    }
+#if DEBUG_MALLOC
+    PRINTF(" !sbrk(%d),total=%d! ", incr, (int)(heap_end - &_end));
+#endif
+
+    heap_end += incr;
+    return (caddr_t) prev_heap_end;
+}
+#endif
+
 /* USER CODE END 1 */
 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

debug.h

@@ -8,6 +8,7 @@
 #include <inttypes.h>
 #include <stddef.h>
 #include <stdarg.h>
+#include "macro.h"
 
 #if USE_DEBUG_UART
 

framework/settings.c

@@ -87,11 +87,10 @@ static bool savebuf_ovhandler(PayloadBuilder *pb, uint32_t more)
 void settings_save(void)
 {
     HAL_StatusTypeDef hst;
-    bool suc;
 
     assert_param(save_buffer == NULL); // It must be NULL here - otherwise we have a leak
-    save_buffer = malloc_ck(FLASH_SAVE_BUF_LEN, &suc);
+    save_buffer = malloc_ck(FLASH_SAVE_BUF_LEN);
-    assert_param(suc);
+    assert_param(save_buffer != NULL);
 
     PayloadBuilder pb = pb_start(save_buffer, FLASH_SAVE_BUF_LEN, savebuf_ovhandler);
 
@@ -151,7 +150,7 @@ void settings_save(void)
     assert_param(hst == HAL_OK);
     fls_printf("--- Flash done ---\r\n");
 
-    free(save_buffer);
+    free_ck(save_buffer);
     save_buffer = NULL;
 
 #if DEBUG_FLASH_WRITE

framework/unit.c

@@ -5,6 +5,7 @@
 #include "platform.h"
 #include "unit.h"
 #include "resources.h"
+#include "unit_base.h"
 
 char unit_tmp512[UNIT_TMP_LEN];
 
@@ -16,16 +17,8 @@ void clean_failed_unit(Unit *unit)
     dbg("!! Init of [%s] failed!", unit->name);
 
     // Free if it looks like it might've been allocated
-    if (isDynAlloc(unit->data)) {
+    free_ck(unit->data);
-        dbg("Freeing allocated unit data");
+    free_ck(unit->name);
-        free(unit->data);
-        unit->data = NULL;
-    }
-    if (isDynAlloc(unit->name)) {
-        dbg("Freeing allocated name");
-        free((void *) unit->name);
-        unit->name = NULL;
-    }
 
     dbg("Releasing any held resources");
     // Release any already claimed resources

framework/unit_registry.c

@@ -58,8 +58,8 @@ void ureg_add_type(const UnitDriver *driver)
     assert_param(driver->deInit != NULL);
     assert_param(driver->handleRequest != NULL);
 
-    UregEntry *re = calloc_ck(1, sizeof(UregEntry), &suc);
+    UregEntry *re = calloc_ck(1, sizeof(UregEntry));
-    assert_param(suc);
+    assert_param(re != NULL);
 
     re->driver = driver;
     re->next = NULL;
@@ -81,11 +81,7 @@ static void free_le_unit(UlistEntry *le)
     pUnit->driver->deInit(pUnit);
     // Name is not expected to be freed by the deInit() function
     // - was alloc'd in the settings load loop
-    if (isDynAlloc(pUnit->name)) {
+    free_ck(pUnit->name);
-        dbg("Freeing allocated name");
-        free((void *) pUnit->name);
-        pUnit->name = NULL;
-    }
 }
 
 /** Add unit to the list, updating references as needed */
@@ -103,7 +99,6 @@ static void add_unit_to_list(UlistEntry *le)
 // create a unit instance (not yet loading or initing - just pre-init)
 Unit *ureg_instantiate(const char *driver_name)
 {
-    bool suc = true;
     error_t rv;
 
     // Find type in the repository
@@ -111,8 +106,8 @@ Unit *ureg_instantiate(const char *driver_name)
     while (re != NULL) {
         if (streq(re->driver->name, driver_name)) {
             // Create new list entry
-            UlistEntry *le = calloc_ck(1, sizeof(UlistEntry), &suc);
+            UlistEntry *le = calloc_ck(1, sizeof(UlistEntry));
-            CHECK_SUC();
+            if (le == NULL) return NULL;
 
             le->next = NULL;
 
@@ -132,7 +127,7 @@ Unit *ureg_instantiate(const char *driver_name)
 
                 dbg("!! Unit type %s failed to pre-init! %s", driver_name, error_get_message(rv));
                 clean_failed_unit(pUnit);
-                free(le);
+                free_ck(le);
                 return NULL;
             }
 
@@ -211,7 +206,7 @@ bool ureg_load_units(PayloadParser *pp)
 
                 // NAME
                 pp_string(pp, typebuf, 16);
-                pUnit->name = strdup(typebuf);
+                pUnit->name = strdup_ck(typebuf);
                 assert_param(pUnit->name);
 
                 // callsign
@@ -247,7 +242,7 @@ void ureg_remove_all_units(void)
         next = le->next;
 
         free_le_unit(le);
-        free(le);
+        free_ck(le);
 
         le = next;
     }
@@ -274,17 +269,17 @@ bool ureg_instantiate_by_ini(const char *restrict driver_name, const char *restr
                 char *name = NULL;
                 if (delim != NULL) {
                     // not last
-                    name = strndup(p, delim - p);
+                    name = strndup_ck(p, delim - p);
                     p = delim + 1;
                 } else {
                     // last name
-                    name = strdup(p);
+                    name = strdup_ck(p);
                     p = NULL; // quit after this loop ends
                 }
                 assert_param(name);
                 Unit *pUnit = ureg_instantiate(driver_name);
                 if (!pUnit) {
-                    free(name);
+                    free_ck(name);
                     return false;
                 }
 
@@ -514,9 +509,8 @@ void ureg_report_active_units(TF_ID frame_id)
     }
     msglen += count; // one byte per message for the callsign
 
-    bool suc = true;
+    uint8_t *buff = calloc_ck(1, msglen);
-    uint8_t *buff = calloc_ck(1, msglen, &suc);
+    if (buff == NULL) {
-    if (!suc) {
         com_respond_error(frame_id, E_OUT_OF_MEM);
         return;
     }
@@ -539,7 +533,7 @@ void ureg_report_active_units(TF_ID frame_id)
 
         com_respond_buf(frame_id, MSG_SUCCESS, buff, msglen);
     }
-    free(buff);
+    free_ck(buff);
 }
 
 Unit *ureg_get_rsc_owner(Resource resource)

gex.mk

@@ -57,7 +57,8 @@ GEX_CFLAGS = \
     -MD -Wno-redundant-decls -Wno-unused-parameter \
     -Wno-unused-variable -Wno-inline \
     -fmerge-constants -fmerge-all-constants -Wno-implicit-fallthrough \
-    -fno-exceptions -finline-small-functions -findirect-inlining -Wno-strict-aliasing -Wno-float-equal -Wno-discarded-qualifiers -fstack-usage
+    -fno-exceptions -finline-small-functions -findirect-inlining -Wno-strict-aliasing -Wno-float-equal \
+    -Wno-discarded-qualifiers -fstack-usage
 
 GEX_CDEFS_BASE =  \
     -D__weak="__attribute__((weak))" \
@@ -75,7 +76,8 @@ GEX_CDEFS = $(GEX_CDEFS_BASE) \
     -DDEBUG_FLASH_WRITE=0 \
     -DVERBOSE_HARDFAULT=0 \
     -DUSE_STACK_MONITOR=0 \
-    -DUSE_DEBUG_UART=0
+    -DUSE_DEBUG_UART=0 \
+    -DDEBUG_MALLOC=0
 
 else
 
@@ -86,7 +88,8 @@ GEX_CDEFS = $(GEX_CDEFS_BASE) \
     -DDEBUG_FLASH_WRITE=0 \
     -DVERBOSE_HARDFAULT=1 \
     -DUSE_STACK_MONITOR=1 \
-    -DUSE_DEBUG_UART=1
+    -DUSE_DEBUG_UART=1 \
+    -DDEBUG_MALLOC=0
 
 endif
 

platform/plat_compat.h

@@ -15,7 +15,8 @@
  #define TSK_STACK_MAIN      160
 #endif
 
-#define TSK_STACK_MSG       180 // TF message handler task stack size (all unit commands run on this thread)
+// 180 is normally enough if not doing extensive debug logging
+#define TSK_STACK_MSG       200 // TF message handler task stack size (all unit commands run on this thread)
 
 #define BULK_READ_BUF_LEN 256   // Buffer for TF bulk reads
 #define UNIT_TMP_LEN      512   // Buffer for internal unit operations

units/digital_in/unit_din.c

@@ -103,9 +103,8 @@ static void DI_writeIni(Unit *unit, IniWriter *iw)
 /** Allocate data structure and set defaults */
 static error_t DI_preInit(Unit *unit)
 {
-    bool suc = true;
+    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
-    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
+    if (priv == NULL) return E_OUT_OF_MEM;
-    if (!suc) return E_OUT_OF_MEM;
 
     // some defaults
     priv->port_name = 'A';
@@ -167,8 +166,7 @@ static void DI_deInit(Unit *unit)
     rsc_teardown(unit);
 
     // Free memory
-    free(unit->data);
+    free_ck(unit->data);
-    unit->data = NULL;
 }
 
 // ------------------------------------------------------------------------

units/digital_out/unit_dout.c

@@ -96,9 +96,8 @@ static void DO_writeIni(Unit *unit, IniWriter *iw)
 /** Allocate data structure and set defaults */
 static error_t DO_preInit(Unit *unit)
 {
-    bool suc = true;
+    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
-    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
+    if (priv == NULL) return E_OUT_OF_MEM;
-    if (!suc) return E_OUT_OF_MEM;
 
     // some defaults
     priv->port_name = 'A';
@@ -153,8 +152,7 @@ static void DO_deInit(Unit *unit)
     rsc_teardown(unit);
 
     // Free memory
-    free(unit->data);
+    free_ck(unit->data);
-    unit->data = NULL;
 }
 
 // ------------------------------------------------------------------------

units/i2c/unit_i2c.c

@@ -129,9 +129,8 @@ static void UI2C_writeIni(Unit *unit, IniWriter *iw)
 /** Allocate data structure and set defaults */
 static error_t UI2C_preInit(Unit *unit)
 {
-    bool suc = true;
+    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
-    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
+    if (priv == NULL) return E_OUT_OF_MEM;
-    if (!suc) return E_OUT_OF_MEM;
 
     // some defaults
     priv->periph_num = 1;
@@ -282,8 +281,7 @@ static void UI2C_deInit(Unit *unit)
     rsc_teardown(unit);
 
     // Free memory
-    free(unit->data);
+    free_ck(unit->data);
-    unit->data = NULL;
 }
 
 // ------------------------------------------------------------------------

units/neopixel/unit_neopixel.c

@@ -79,9 +79,8 @@ static void Npx_writeIni(Unit *unit, IniWriter *iw)
 /** Allocate data structure and set defaults */
 static error_t Npx_preInit(Unit *unit)
 {
-    bool suc = true;
+    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
-    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
+    if (priv == NULL)
-    if (!suc) return E_OUT_OF_MEM;
 
         // some defaults
     priv->pin_number = 0;
@@ -127,8 +126,7 @@ static void Npx_deInit(Unit *unit)
     rsc_teardown(unit);
 
     // Free memory
-    free(unit->data);
+    free_ck(unit->data);
-    unit->data = NULL;
 }
 
 // ------------------------------------------------------------------------

units/spi/unit_spi.c

@@ -169,9 +169,8 @@ static void USPI_writeIni(Unit *unit, IniWriter *iw)
 /** Allocate data structure and set defaults */
 static error_t USPI_preInit(Unit *unit)
 {
-    bool suc = true;
+    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
-    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
+    if (priv == NULL) return E_OUT_OF_MEM;
-    if (!suc) return E_OUT_OF_MEM;
 
     // some defaults
     priv->periph_num = 1;
@@ -359,8 +358,7 @@ static void USPI_deInit(Unit *unit)
     rsc_teardown(unit);
 
     // Free memory
-    free(unit->data);
+    free_ck(unit->data);
-    unit->data = NULL;
 }
 
 // ------------------------------------------------------------------------

units/test/unit_test.c

@@ -50,9 +50,8 @@ static void Tst_writeIni(Unit *unit, IniWriter *iw)
 /** Allocate data structure and set defaults */
 static error_t Tst_preInit(Unit *unit)
 {
-    bool suc = true;
+    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
-    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
+    if (priv == NULL) return E_OUT_OF_MEM;
-    if (!suc) return E_OUT_OF_MEM;
 
     //
 
@@ -78,8 +77,7 @@ static void Tst_deInit(Unit *unit)
     //
 
     // Free memory
-    free(unit->data);
+    free_ck(unit->data);
-    unit->data = NULL;
 }
 
 // ------------------------------------------------------------------------
@@ -98,7 +96,7 @@ static void br_longtext(struct bulk_read *bulk, uint32_t chunk, uint8_t *buffer)
 {
     // clean-up request
     if (buffer == NULL) {
-        free(bulk);
+        free_ck(bulk);
         return;
     }
 
@@ -109,7 +107,7 @@ static void bw_dump(struct bulk_write *bulk, const uint8_t *chunk, uint32_t len)
 {
     // clean-up request
     if (chunk == NULL) {
-        free(bulk);
+        free_ck(bulk);
         return;
     }
 
@@ -133,7 +131,7 @@ static error_t Tst_handleRequest(Unit *unit, TF_ID frame_id, uint8_t command, Pa
             return E_SUCCESS;
 
         case CMD_BULKREAD:;
-            BulkRead *br = malloc(sizeof(struct bulk_read));
+            BulkRead *br = malloc_ck(sizeof(struct bulk_read));
             assert_param(br);
 
             br->len = (uint32_t) strlen(longtext);
@@ -144,7 +142,7 @@ static error_t Tst_handleRequest(Unit *unit, TF_ID frame_id, uint8_t command, Pa
             return E_SUCCESS;
 
         case CMD_BULKWRITE:;
-            BulkWrite *bw = malloc(sizeof(struct bulk_write));
+            BulkWrite *bw = malloc_ck(sizeof(struct bulk_write));
             assert_param(bw);
 
             bw->len = 10240;

units/usart/unit_usart.c

@@ -42,9 +42,8 @@ struct priv {
 /** Allocate data structure and set defaults */
 static error_t UUSART_preInit(Unit *unit)
 {
-    bool suc = true;
+    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv));
-    struct priv *priv = unit->data = calloc_ck(1, sizeof(struct priv), &suc);
+    if (priv == NULL) return E_OUT_OF_MEM;
-    if (!suc) return E_OUT_OF_MEM;
 
     // some defaults
     priv->periph_num = 1;
@@ -618,7 +617,7 @@ static void UUSART_deInit(Unit *unit)
     rsc_teardown(unit);
 
     // Free memory
-    free(unit->data);
+    free_ck(unit->data);
     unit->data = NULL;
 }
 

utils/cortex_utils.h

@@ -12,17 +12,6 @@ static inline bool inIRQ(void)
     return __get_IPSR() != 0;
 }
 
-register char *__SP asm("sp");
-
-static inline bool isDynAlloc(const void *obj)
-{
-    // this is the 0x20000000-something address that should correspond to heap bottom
-    extern char heapstart __asm("end");
-
-    return ((uint32_t)obj >= (uint32_t)&heapstart)
-           && ((uint32_t)obj < (uint32_t)__SP);
-}
-
 /** Tight asm loop */
 #define __asm_loop(cycles) \
 do { \

utils/ini_writer.c

@@ -23,17 +23,15 @@ char *iwbuffer = NULL;
 void iw_begin(void)
 {
     assert_param(iwbuffer == NULL);
-    bool suc = true;
+    iwbuffer = malloc_ck(IWBUFFER_LEN);
-    iwbuffer = malloc_ck(IWBUFFER_LEN, &suc);
+    assert_param(iwbuffer != NULL);
-    assert_param(suc);
 }
 
 /** Release the helper buffer */
 void iw_end(void)
 {
     assert_param(iwbuffer != NULL);
-    free(iwbuffer);
+    free_ck(iwbuffer);
-    iwbuffer = NULL;
 }
 
 #define IW_VPRINTF() do { \

utils/malloc_safe.c

@@ -1,48 +1,44 @@
-#include <stdlib.h>
+#include "platform.h"
-#include <stdint.h>
-#include <stdbool.h>
-#include <inttypes.h>
 #include "debug.h"
 #include "stm32_assert.h"
 #include "malloc_safe.h"
 
-#if 1
+void *malloc_ck_do(size_t size,  const char *file, uint32_t line)
-
-void *malloc_safe_do(size_t size, const char *file, uint32_t line)
-{
-    void *mem = malloc(size);
-    if (mem == NULL) abort_msg("MALLOC FAILED", file, line);
-    return mem;
-}
-
-void *calloc_safe_do(size_t nmemb, size_t size, const char *file, uint32_t line)
 {
-    void *mem = calloc(size, nmemb);
+    void *mem = pvPortMalloc(size);
-    if (mem == NULL) abort_msg("CALLOC FAILED", file, line);
+    _malloc_trace(size, mem, file, line);
-    return mem;
-}
-
-
-void *malloc_ck_do(size_t size, bool *suc, const char *file, uint32_t line)
-{
-    void *mem = malloc(size);
     if (mem == NULL) {
         warn_msg("MALLOC FAILED", file, line);
-        *suc = false;
-        mem = NULL;
     }
     return mem;
 }
 
-void *calloc_ck_do(size_t nmemb, size_t size, bool *suc, const char *file, uint32_t line)
+void *calloc_ck_do(size_t nmemb, size_t size, const char *file, uint32_t line)
 {
-    void *mem = calloc(size, nmemb);
+    void *mem = pvPortMalloc(size*nmemb);
+    _malloc_trace(nmemb*size, mem, file, line);
     if (mem == NULL) {
         warn_msg("CALLOC FAILED", file, line);
-        *suc = false;
-        mem = NULL;
     }
+    memset(mem, 0, size*nmemb);
     return mem;
 }
 
-#endif
+char *strdup_ck_do(const char *s, const char* file, uint32_t line)
+{
+    size_t len = strlen(s) + 1;
+    void *new = malloc_ck_do(len, file, line);
+    if (new == NULL) return NULL;
+    return (char *) memcpy (new, s, len);
+}
+
+char *strndup_ck_do(const char *s, uint32_t len, const char* file, uint32_t line)
+{
+    // TODO verify - this was not tested
+    size_t alen = MIN(strlen(s) + 1, len);
+    uint8_t *new = malloc_ck_do(alen, file, line);
+    if (new == NULL) return NULL;
+    memcpy (new, s, alen-1);
+    new[alen-1] = '\0';
+    return (char *) new;
+}

utils/malloc_safe.h

@@ -9,14 +9,35 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-void *malloc_safe_do(size_t size, const char* file, uint32_t line) __attribute__((malloc));
+void *malloc_ck_do(size_t size, const char* file, uint32_t line) __attribute__((malloc));
-void *calloc_safe_do(size_t nmemb, size_t size, const char* file, uint32_t line) __attribute__((malloc));
+void *calloc_ck_do(size_t nmemb, size_t size, const char* file, uint32_t line) __attribute__((malloc));
-void *malloc_ck_do(size_t size, bool *suc, const char* file, uint32_t line) __attribute__((malloc));
+char *strdup_ck_do(const char *s, const char* file, uint32_t line) __attribute__((malloc));
-void *calloc_ck_do(size_t nmemb, size_t size, bool *suc, const char* file, uint32_t line) __attribute__((malloc));
+char *strndup_ck_do(const char *s, uint32_t len, const char* file, uint32_t line) __attribute__((malloc));
 
-#define malloc_s(size)        malloc_safe_do(size,        __BASE_FILE__, __LINE__)
+#if DEBUG_MALLOC
-#define calloc_s(nmemb, size) calloc_safe_do(nmemb, size, __BASE_FILE__, __LINE__)
+
-#define malloc_ck(size, suc)        malloc_ck_do(size, suc,   __BASE_FILE__, __LINE__)
+    #define _malloc_trace(len, obj, file, line) do { PRINTF("~ malloc(%d) -> 0x%p at ", len, obj); PUTS(file); PUTCHAR(':'); PRINTF("%d\r\n", (int)line); } while (0)
-#define calloc_ck(nmemb, size, suc) calloc_ck_do(nmemb, size, suc, __BASE_FILE__, __LINE__)
+    #define _free_trace(obj, file, line)   do { PRINTF("~ free(0x%p) at ", obj); PUTS(file); PUTCHAR(':'); PRINTF("%d\r\n", (int)line); } while (0)
+    #define malloc_ck(size) malloc_ck_do(size, __BASE_FILE__, __LINE__)
+    #define calloc_ck(nmemb, size) calloc_ck_do(nmemb, size, __BASE_FILE__, __LINE__)
+    #define strdup_ck(s) strdup_ck_do(s, __BASE_FILE__, __LINE__)
+    #define strndup_ck(s, len) strndup_ck_do(s, (uint32_t)(len), __BASE_FILE__, __LINE__)
+#else
+    #define _malloc_trace(len, obj, file, line)
+    #define _free_trace(obj, file, line)
+    #define malloc_ck(size) malloc_ck_do(size, "", 0)
+    #define calloc_ck(nmemb, size) calloc_ck_do(nmemb, size, "", 0)
+    #define strdup_ck(s) strdup_ck_do(s, "", 0)
+    #define strndup_ck(s, len) strndup_ck_do(s, (uint32_t)(len), "", 0)
+#endif
+
+/**
+ * Free an allocated object, and assign it to NULL.
+ */
+#define free_ck(obj) do { \
+    _free_trace(obj, __BASE_FILE__, __LINE__); \
+    if ((obj) != NULL) vPortFree((void *)(obj)); \
+    obj = NULL; \
+} while (0)
 
 #endif // MALLOC_SAFE_H

utils/snprintf.c

@@ -23,6 +23,7 @@
 
 /**** pts: sam2p-specific defines ****/
 #include "snprintf.h"
+#include "malloc_safe.h"
 /* #include <stdarg.h> -- from snprintf.h */
 #ifdef NULL  /* as on Mac OS/X 10.5.7 <stdlib.h> */
 #  undef NULL
@@ -32,7 +33,7 @@
 #  define malloc ::operator new
 #else
 #  include <stdlib.h> /* malloc() */
-#include <debug.h>
+#include "debug.h"
 
 #endif
 #define size_t size_t /* normally: int, unsigned */
@@ -834,7 +835,7 @@ size_t vasprintf(char **ptr, const char *format, va_list ap)
     ret = vsnprintf((char*)NULL, 0, format, ap);
     if (ret+1 <= 1) return ret; /* pts: bit of old unsigned trick... */
 
-    if (NULL==(*ptr = (char *)malloc(ret+1))) return (size_t)-1;
+    if (NULL==(*ptr = (char *)malloc_ck(ret+1))) return (size_t)-1;
     ret = vsnprintf(*ptr, ret+1, format, ap);
 
     return ret;