About HEAP error

[Richi Dubey]

What's the element written after the free? I set a watch at the exact block
location, but it doesn't work:

Hardware watchpoint 7: *0x202ba8
(gdb) watch *0x206fec
Hardware watchpoint 8: *0x206fec
(gdb) c
Continuing.

Thread 1 hit Breakpoint 6, Init (argument=2107944) at
/home/richi/quick-start/LatestStrong/src/rtems/c/src/../../testsuites/sptests/sp02/init.c:26
26  TEST_BEGIN();
(gdb)
Continuing.

Thread 1 hit Breakpoint 5, _Terminate (the_source=RTEMS_FATAL_SOURCE_HEAP,
the_error=2125180) at
/home/richi/quick-start/LatestStrong/src/rtems/c/src/../../cpukit/score/src/interr.c:38
38  _User_extensions_Fatal( the_source, the_error );
(gdb)
Continuing.

Thread 1 hit Breakpoint 4, bsp_reset () at
/home/richi/quick-start/LatestStrong/src/rtems/c/src/lib/libbsp/arm/realview-pbx-a9/../../../../../../bsps/arm/realview-pbx-a9/start/bspreset.c:19
19  volatile uint32_t *sys_lock = (volatile uint32_t *) 0x10000020;
(gdb)

On Wed, Mar 3, 2021 at 12:31 PM Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:

> On 02/03/2021 05:44, Richi Dubey wrote:
>
> >
> > (gdb) p *(Heap_Error_context*)(0x00206d7c)
> > $5 = {
> >   heap = 0x202ba8 <_Workspace_Area>,
> >   block = 0x206fec,
> >   reason = HEAP_ERROR_FREE_PATTERN
> > }
>
> If it is always the same address, then you can set a watch point to an
> element which is written after the free to catch the function which
> writes into this area.
>
> --
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