2010-02-02 Zoltan Varga <vargaz@gmail.com>

	* mini-amd64.c (mono_arch_emit_prolog): Initialize lmf->rsp in the prolog too
	so async stack walks don't crash.

svn path=/branches/mono-2-6/mono/; revision=150738

mono/mini/ChangeLog

@@ -1,3 +1,8 @@
+2010-02-02  Zoltan Varga  <vargaz@gmail.com>
+
+	* mini-amd64.c (mono_arch_emit_prolog): Initialize lmf->rsp in the prolog too
+	so async stack walks don't crash.
+
 2010-02-02  Zoltan Varga  <vargaz@gmail.com>
 
 	* mini-trampolines.c (mono_magic_trampoline): Fix a problem where the callsite

mono/mini/debugger-agent.c

@@ -1858,6 +1858,8 @@ mono_debugger_agent_thread_interrupt (void *sigctx, MonoJitInfo *ji)
 				tls->has_async_ctx = FALSE;
 			}
 
+			mono_memory_barrier ();
+
 			tls->suspended = TRUE;
 			MONO_SEM_POST (&suspend_sem);
 		}

mono/mini/mini-amd64.c

@@ -5827,7 +5827,11 @@ mono_arch_emit_prolog (MonoCompile *cfg)
 		/* 
 		 * The ip field is not set, the exception handling code will obtain it from the stack location pointed to by the sp field.
 		 */
-		/* sp is saved right before calls */
+		/* 
+		 * sp is saved right before calls but we need to save it here too so
+		 * async stack walks would work.
+		 */
+		amd64_mov_membase_reg (code, cfg->frame_reg, cfg->arch.lmf_offset + G_STRUCT_OFFSET (MonoLMF, rsp), AMD64_RSP, 8);
 		/* Skip method (only needed for trampoline LMF frames) */
 		/* Save callee saved regs */
 		for (i = 0; i < MONO_MAX_IREGS; ++i) {