From: Martin Quinson <martin.quinson@loria.fr>
Date: Sun, 11 Dec 2016 21:14:07 +0000 (+0100)
Subject: improve an error message
X-Git-Tag: v3_14~72
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/85bf1fb563ae7e47c7bfa232aa09147aa917083c

improve an error message
---

diff --git a/src/simix/smx_global.cpp b/src/simix/smx_global.cpp
index 6ed45ba6ea..dd1e2687f5 100644
--- a/src/simix/smx_global.cpp
+++ b/src/simix/smx_global.cpp
@@ -81,12 +81,17 @@ static void segvhandler(int signum, siginfo_t *siginfo, void *context)
 {
   if (siginfo->si_signo == SIGSEGV && siginfo->si_code == SEGV_ACCERR) {
     fprintf(stderr, "Access violation detected.\n"
-                    "This can result from a programming error in your code or, although less likely,\n"
-                    "from a bug in SimGrid itself.  This can also be the sign of a bug in the OS or\n"
-                    "in third-party libraries.  Failing hardware can sometimes generate such errors\n"
-                    "too.\n"
-                    "Finally, if nothing of the above applies, this can result from a stack overflow.\n"
-                    "Try to increase stack size with --cfg=contexts/stack-size (current size is %d KiB).\n",
+                    "This probably comes from a programming error in your code, or from a stack\n"
+                    "overflow. If you are certain of your code, try increasing the stack size\n"
+                    "   --cfg=contexts/stack-size=XXX (current size is %d KiB).\n"
+                    "\n"
+                    "If it does not help, this may have one of the following causes:\n"
+                    "a bug in SimGrid, a bug in the OS or a bug in a third-party libraries.\n"
+                    "Failing hardware can sometimes generate such errors too.\n"
+                    "\n"
+                    "If you think you've found a bug in SimGrid, please report it along with a\n"
+                    "Minimal Working Example (MWE) reproducing your problem and a full backtrace\n"
+                    "of the fault captured with gdb or valgrind.\n",
             smx_context_stack_size / 1024);
     if (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_debug)) {
       fprintf(stderr, "siginfo = {si_signo = %d, si_errno = %d, si_code = %d, si_addr = %p}\n",