Difference between revisions of "How to use SystemView Heap Monitoring - Custom Heap"
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This article assumes a working SystemView setup. To gain some more info on this subject, please consult either the main article ([[How to use SystemView Heap_Monitoring]]) or the SystemView documentation. |
This article assumes a working SystemView setup. To gain some more info on this subject, please consult either the main article ([[How to use SystemView Heap_Monitoring]]) or the SystemView documentation. |
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+ | Note that the size reported to SystemView should be the internally allocated size minus the meta data, not the size requested buy a user. |
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<pre> |
<pre> |
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static void* _MyMalloc(size_t size) { |
static void* _MyMalloc(size_t size) { |
Revision as of 17:33, 18 July 2023
This article assumes a working SystemView setup. To gain some more info on this subject, please consult either the main article (How to use SystemView Heap_Monitoring) or the SystemView documentation.
Note that the size reported to SystemView should be the internally allocated size minus the meta data, not the size requested buy a user.
static void* _MyMalloc(size_t size) { void* p = malloc(size); // SystemView needs the real internal heap block size, not the amount requested by the user SEGGER_SYSVIEW_HeapAlloc(__heap_start__, p, _GetAllocBlockSize(size)); return p; }
Since there is no dedicated realloc SystemView API function, a combination of SEGGER_SYSVIEW_HeapFree
and SEGGER_SYSVIEW_HeapAlloc
is needed:
static void* _MyRealloc(void* p, size_t size) { void* rp = realloc(p, size); SEGGER_SYSVIEW_HeapFree(__heap_start__, p); // SystemView needs the real internal heap block size, not the amount requested by the user SEGGER_SYSVIEW_HeapAlloc(__heap_start__, rp, _GetAllocBlockSize(size)); return rp; }
static void _MyFree(void* p) { free(p); SEGGER_SYSVIEW_HeapFree(__heap_start__, p); }