Install signal handler for SIGSEGV.

[simgrid.git] / src / simix / smx_context_thread.c

diff --git a/src/simix/smx_context_thread.c b/src/simix/smx_context_thread.c
index ea06db0..ee35dfd 100644 (file)
--- a/src/simix/smx_context_thread.c
+++ b/src/simix/smx_context_thread.c
@@ -94,6 +94,8 @@ smx_ctx_thread_factory_create_context(xbt_main_func_t code, int argc,
     context->end = xbt_os_sem_init(0);
     if (smx_context_stack_size_was_set)
       xbt_os_thread_setstacksize(smx_context_stack_size);
+    if (smx_context_guard_size_was_set)
+      xbt_os_thread_setguardsize(smx_context_guard_size);
 
     /* create and start the process */
     /* NOTE: The first argument to xbt_os_thread_create used to be the process *
@@ -151,6 +153,13 @@ static void *smx_ctx_thread_wrapper(void *param)
 {
   smx_ctx_thread_t context = (smx_ctx_thread_t) param;
 
+  /* Install alternate signal stack, for SIGSEGV handler. */
+  stack_t stack;
+  stack.ss_sp = sigsegv_stack;
+  stack.ss_size = sizeof sigsegv_stack;
+  stack.ss_flags = 0;
+  sigaltstack(&stack, NULL);
+
   /* Tell the maestro we are starting, and wait for its green light */
   xbt_os_sem_release(context->end);
   xbt_os_sem_acquire(context->begin);