merge revision(s) 56030,56035: [Backport #12711]

	* vm_dump.c (backtrace): use rip in the saved context for the case
	  the SIGSEGV is received when the process is in userland.
	  Note that ip in the stack should be used if the signal is received
	  when it is in kernel (when it is calling syscall) [Bug #12711]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@56257 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 15 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index b143725230..20cb13f06a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Mon Sep 26 23:10:43 2016  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* vm_dump.c (backtrace): use rip in the saved context for the case
+	  the SIGSEGV is received when the process is in userland.
+	  Note that ip in the stack should be used if the signal is received
+	  when it is in kernel (when it is calling syscall) [Bug #12711]
+
 Mon Sep 26 20:23:32 2016  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
 
 	* gems/bundled_gems: update minitest to 5.8.5.
diff --git a/version.h b/version.h
index 7c40c249a9..1ba20db5bf 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.2"
 #define RUBY_RELEASE_DATE "2016-09-26"
-#define RUBY_PATCHLEVEL 189
+#define RUBY_PATCHLEVEL 190
 
 #define RUBY_RELEASE_YEAR 2016
 #define RUBY_RELEASE_MONTH 9
diff --git a/vm_dump.c b/vm_dump.c
index df0d2413c9..01d15062fc 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -482,10 +482,14 @@ darwin_sigtramp:
 	unw_set_reg(&cursor, UNW_X86_64_R13, uctx->uc_mcontext->__ss.__r13);
 	unw_set_reg(&cursor, UNW_X86_64_R14, uctx->uc_mcontext->__ss.__r14);
 	unw_set_reg(&cursor, UNW_X86_64_R15, uctx->uc_mcontext->__ss.__r15);
-	ip = *(unw_word_t*)uctx->uc_mcontext->__ss.__rsp;
-	unw_set_reg(&cursor, UNW_REG_IP, ip);
-	trace[n++] = (void *)uctx->uc_mcontext->__ss.__rip;
+	ip = uctx->uc_mcontext->__ss.__rip;
+	if (((char*)ip)[-2] == 0x0f && ((char*)ip)[-1] == 5) {
+	    /* signal received in syscall */
+	    trace[n++] = (void *)ip;
+	    ip = *(unw_word_t*)uctx->uc_mcontext->__ss.__rsp;
+	}
 	trace[n++] = (void *)ip;
+	unw_set_reg(&cursor, UNW_REG_IP, ip);
     }
     while (unw_step(&cursor) > 0) {
 	unw_get_reg(&cursor, UNW_REG_IP, &ip);