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Upstream-Status: Backport
This fixes undefined behaviour in boehm GC as suggested at
https://github.com/ivmai/bdwgc/commit/16780405c899f01119bc45167122b4242f6b34fb.
The undefined behaviour at very least causes a segmentation fault during
classpath-native configure step.
Signed-off-by: Erkka Kääriä <erkka.kaaria@intel.com>
--- cacao-0.98/src/mm/boehm-gc/mark_rts.c
+++ cacao-0.98/src/mm/boehm-gc/mark_rts.c
@@ -371,18 +371,7 @@ ptr_t p;
ptr_t GC_approx_sp()
{
- VOLATILE word dummy;
-
- dummy = 42; /* Force stack to grow if necessary. Otherwise the */
- /* later accesses might cause the kernel to think we're */
- /* doing something wrong. */
-# ifdef _MSC_VER
-# pragma warning(disable:4172)
-# endif
- return((ptr_t)(&dummy));
-# ifdef _MSC_VER
-# pragma warning(default:4172)
-# endif
+ return __builtin_frame_address(0);
}
/*
--
2.1.4
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