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-rw-r--r--recipes-core/cacao/files/cacao-0.9.8-initial-fix-gc-undefined-behaviour.patch35
1 files changed, 35 insertions, 0 deletions
diff --git a/recipes-core/cacao/files/cacao-0.9.8-initial-fix-gc-undefined-behaviour.patch b/recipes-core/cacao/files/cacao-0.9.8-initial-fix-gc-undefined-behaviour.patch
new file mode 100644
index 0000000..ccc35cb
--- /dev/null
+++ b/recipes-core/cacao/files/cacao-0.9.8-initial-fix-gc-undefined-behaviour.patch
@@ -0,0 +1,35 @@
+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
+