From: Julian Seward <jseward@acm.org>
Date: Wed, 20 Oct 2004 18:36:23 +0000 (+0000)
Subject: In the signal handler, make debug printing a bit more verbose.
X-Git-Tag: svn/VALGRIND_3_0_1^2~945
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13743647042851b1e1e0ba9622a613ed1d43e5fa;p=thirdparty%2Fvalgrind.git

In the signal handler, make debug printing a bit more verbose.


git-svn-id: svn://svn.valgrind.org/vex/trunk@389
---

diff --git a/VEX/head20041019/coregrind/vg_signals.c b/VEX/head20041019/coregrind/vg_signals.c
index 602393c97f..5c5d0266b5 100644
--- a/VEX/head20041019/coregrind/vg_signals.c
+++ b/VEX/head20041019/coregrind/vg_signals.c
@@ -1700,6 +1700,7 @@ void vg_sync_signalhandler ( Int sigNo, vki_ksiginfo_t *info, struct vki_ucontex
    */
 
    if (VG_(clo_trace_signals)) {
+      VG_(message)(Vg_DebugMsg, "");
       VG_(message)(Vg_DebugMsg, "signal %d arrived ... si_code=%d", sigNo, info->si_code );
    }
    vg_assert(sigNo >= 1 && sigNo <= VKI_KNSIG);
@@ -1767,6 +1768,9 @@ void vg_sync_signalhandler ( Int sigNo, vki_ksiginfo_t *info, struct vki_ucontex
 	    then extend the stack segment. 
 	 */
 	 Addr base = PGROUNDDN(esp);
+         if (VG_(clo_trace_signals)) {
+            VG_(message)(Vg_DebugMsg, "attempt to extend stack downwards ...");
+         }
          if (seg->len + (seg->addr - base) <= VG_(threads)[tid].stack_size &&
              (void*)-1 != VG_(mmap)((Char *)base, seg->addr - base,
                               VKI_PROT_READ|VKI_PROT_WRITE|VKI_PROT_EXEC,
@@ -1774,7 +1778,14 @@ void vg_sync_signalhandler ( Int sigNo, vki_ksiginfo_t *info, struct vki_ucontex
                               SF_STACK|SF_GROWDOWN,
                               -1, 0))
          {
-           return;             // extension succeeded, restart instruction
+            if (VG_(clo_trace_signals)) {
+               VG_(message)(Vg_DebugMsg, "... succeeded.");
+            }
+            return;             // extension succeeded, restart instruction
+	 } else {
+            if (VG_(clo_trace_signals)) {
+               VG_(message)(Vg_DebugMsg, "... failed.");
+            }
 	 }
 	 /* Otherwise fall into normal signal handling */
       } else if (info->si_code == 2 && /* SEGV_ACCERR */