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py/gc: Avoid valgrind false positives.

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When you want to use the valgrind memory analysis tool on MicroPython, you
can arrange to define MICROPY_DEBUG_VALGRIND to enable use of special
valgrind macros.  For now, this only fixes `gc_get_ptr` so that it never
emits the diagnostic "Conditional jump or move depends on uninitialised
value(s)".

Signed-off-by: Jeff Epler <jepler@gmail.com>
This commit is contained in:
Jeff Epler
2021-08-27 09:02:03 -05:00
committed by Damien George
parent 2283b6d68f
commit 84071590b3
2 changed files with 14 additions and 0 deletions
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5
py/mpconfig.h
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@@ -510,6 +510,11 @@
#define MICROPY_DEBUG_VM_STACK_OVERFLOW (0)
#endif
// Whether to enable extra instrumentation for valgrind
#ifndef MICROPY_DEBUG_VALGRIND
#define MICROPY_DEBUG_VALGRIND (0)
#endif
/*****************************************************************************/
/* Optimisations */