From 69dfe51b684dd9d510dbcb63295fe180f998efde Mon Sep 17 00:00:00 2001
From: Dave Allison <dallison@google.com>
Date: Fri, 11 Jul 2014 17:11:58 +0000
Subject: Revert "Revert "Revert "Revert "Add implicit null and stack checks
 for x86""""

This reverts commit 0025a86411145eb7cd4971f9234fc21c7b4aced1.

Bug: 16256184
Change-Id: Ie0760a0c293aa3b62e2885398a8c512b7a946a73
---
 sigchainlib/Android.mk  | 15 +++++++++++++++
 sigchainlib/sigchain.cc | 20 ++++++++++++++++++++
 2 files changed, 35 insertions(+)

(limited to 'sigchainlib')

diff --git a/sigchainlib/Android.mk b/sigchainlib/Android.mk
index 8e25339..d86735d 100644
--- a/sigchainlib/Android.mk
+++ b/sigchainlib/Android.mk
@@ -23,8 +23,23 @@ LOCAL_CPP_EXTENSION := $(ART_CPP_EXTENSION)
 LOCAL_MODULE_TAGS := optional
 LOCAL_CFLAGS += $(ART_TARGET_CFLAGS)
 LOCAL_SRC_FILES := sigchain.cc
+LOCAL_CLANG = $(ART_TARGET_CLANG)
 LOCAL_MODULE:= libsigchain
 LOCAL_SHARED_LIBRARIES := liblog libdl
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 LOCAL_ADDITIONAL_DEPENDENCIES += art/build/Android.common_build.mk
 include $(BUILD_SHARED_LIBRARY)
+
+# Build host library.
+include $(CLEAR_VARS)
+LOCAL_CPP_EXTENSION := $(ART_CPP_EXTENSION)
+LOCAL_MODULE_TAGS := optional
+LOCAL_IS_HOST_MODULE := true
+LOCAL_CFLAGS += $(ART_HOST_CFLAGS)
+LOCAL_CLANG = $(ART_HOST_CLANG)
+LOCAL_SRC_FILES := sigchain.cc
+LOCAL_MODULE:= libsigchain
+LOCAL_ADDITIONAL_DEPENDENCIES += $(LOCAL_PATH)/Android.mk
+LOCAL_LDLIBS = -ldl
+LOCAL_MULTILIB := both
+include $(BUILD_HOST_SHARED_LIBRARY)
diff --git a/sigchainlib/sigchain.cc b/sigchainlib/sigchain.cc
index 5a5805f..6f93083 100644
--- a/sigchainlib/sigchain.cc
+++ b/sigchainlib/sigchain.cc
@@ -14,12 +14,22 @@
  * limitations under the License.
  */
 
+#ifdef HAVE_ANDROID_OS
 #include <android/log.h>
+#else
+#include <stdarg.h>
+#include <iostream>
+#endif
+
 #include <dlfcn.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 
+#if defined(__APPLE__)
+#define _NSIG NSIG
+#endif
+
 namespace art {
 
 class SignalAction {
@@ -67,7 +77,11 @@ static void log(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   vsnprintf(buf, sizeof(buf), format, ap);
+#ifdef HAVE_ANDROID_OS
   __android_log_write(ANDROID_LOG_ERROR, "libsigchain", buf);
+#else
+  std::cout << buf << "\n";
+#endif
   va_end(ap);
 }
 
@@ -104,10 +118,16 @@ void InvokeUserSignalHandler(int sig, siginfo_t* info, void* context) {
   if ((action.sa_flags & SA_SIGINFO) == 0) {
     if (action.sa_handler != NULL) {
       action.sa_handler(sig);
+    } else {
+       signal(sig, SIG_DFL);
+       raise(sig);
     }
   } else {
     if (action.sa_sigaction != NULL) {
       action.sa_sigaction(sig, info, context);
+    } else {
+       signal(sig, SIG_DFL);
+       raise(sig);
     }
   }
 }
-- 
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