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x86_64-signal.h
- From: Andrew Haley <aph at redhat dot com>
- To: java-patches at gcc dot gnu dot org
- Date: Tue, 3 Jun 2003 17:14:30 +0100
- Subject: x86_64-signal.h
There's an aliasing bug in libgcj. Interestingly, nothing (offsetof,
unions) I did could fix the problem, and in the end I had to use
volatile.
Andrew.
2003-06-03 Andrew Haley <aph@redhat.com>
* include/x86_64-signal.h (MAKE_THROW_FRAME): Mark sigcontext on
stack volatile to prevent optimization from removing it.
Index: x86_64-signal.h
===================================================================
RCS file: /cvs/gcc/gcc/libjava/include/x86_64-signal.h,v
retrieving revision 1.2
diff -u -w -r1.2 x86_64-signal.h
--- x86_64-signal.h 22 Jan 2003 17:47:04 -0000 1.2
+++ x86_64-signal.h 3 Jun 2003 16:10:43 -0000
@@ -21,7 +21,7 @@
#define HANDLE_SEGV 1
#define SIGNAL_HANDLER(_name) \
-static void _Jv_##_name (int, siginfo_t *_sip, void *_p)
+static void _Jv_##_name (int, siginfo_t *, void *_p)
extern "C"
{
@@ -41,7 +41,7 @@
instruction: the x86_64 exception handler expects \
the PC to point to the instruction after a call. */ \
struct ucontext *_uc = (struct ucontext *)_p; \
- struct sigcontext *_sc = (struct sigcontext *) &_uc->uc_mcontext; \
+ volatile struct sigcontext *_sc = (struct sigcontext *) &_uc->uc_mcontext; \
_sc->rip += 2; \
} \
while (0)