Fix abort(3) to raise SIGABRT rather than causing SIGSEGV.

tgkill() needs the .save stack unwinding directive to get the complete
stack trace.

BUG: https://code.google.com/p/android/issues/detail?id=16672

Change-Id: Ifb447dca2147a592c48baf32769dfc175d8aea72

1 files changed, 3 insertions, 15 deletions

diff --git a/libc/unistd/abort.c b/libc/unistd/abort.c
index 4dffbae..4a349bd 100644
--- a/libc/unistd/abort.c
+++ b/libc/unistd/abort.c
@@ -53,9 +53,7 @@ abort(void)
 	 * any errors -- X311J doesn't allow abort to return anyway.
 	 */
 	sigdelset(&mask, SIGABRT);
-    /* temporary, so deliberate seg fault can be caught by debuggerd */
-	sigdelset(&mask, SIGSEGV);
-    /* -- */
+
 	(void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
 
 	/*
@@ -72,17 +70,7 @@ abort(void)
 		}
 	}
 
-    /* temporary, for bug hunting */
-    /* seg fault seems to produce better debuggerd results than SIGABRT */
-#ifdef __mips__
-    /* An access that will generate SIGSEGV rather than SIGBUS. */
-    *((char*)0xdeadc0c0) = 39;
-#else
-    *((char*)0xdeadbaad) = 39;
-#endif
-    /* -- */
-
-	(void)kill(getpid(), SIGABRT);
+	raise(SIGABRT);
 
 	/*
 	 * if SIGABRT ignored, or caught and the handler returns, do
@@ -99,6 +87,6 @@ abort(void)
         }
 
 	(void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
-	(void)kill(getpid(), SIGABRT);
+	raise(SIGABRT);
 	_exit(1);
 }