From 173247db5500c88f7a7229fd20fb49ebd2d49296 Mon Sep 17 00:00:00 2001
From: Patrick Scott <phanna@android.com>
Date: Tue, 28 Jul 2009 14:44:16 -0400
Subject: Do not merge.

This will attach and detach the native thread to and from the java vm. I believe
this was the cause of a crash in donut. Sometimes, the IconDatabase needs to
notify the WebCore thread of a new Icon. These callbacks post messages through
the vm which causes AttachCurrentThread to be called but no matching
DetachCurrentThread when the thread exits.

Bug:1977972
---
 JavaScriptCore/wtf/ThreadingPthreads.cpp | 41 ++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'JavaScriptCore/wtf/ThreadingPthreads.cpp')

diff --git a/JavaScriptCore/wtf/ThreadingPthreads.cpp b/JavaScriptCore/wtf/ThreadingPthreads.cpp
index 105e42a..8a2c943 100644
--- a/JavaScriptCore/wtf/ThreadingPthreads.cpp
+++ b/JavaScriptCore/wtf/ThreadingPthreads.cpp
@@ -42,6 +42,10 @@
 #include <limits.h>
 #include <sys/time.h>
 
+#if PLATFORM(ANDROID)
+#include "jni_utility.h"
+#endif
+
 namespace WTF {
 
 typedef HashMap<ThreadIdentifier, pthread_t> ThreadMap;
@@ -130,6 +134,42 @@ static void clearPthreadHandleForIdentifier(ThreadIdentifier id)
     threadMap().remove(id);
 }
 
+#if PLATFORM(ANDROID)
+// On the Android platform, threads must be registered with the VM before they run.
+struct ThreadData {
+    ThreadFunction entryPoint;
+    void* arg;
+};
+
+static void* runThreadWithRegistration(void* arg)
+{
+    ThreadData* data = static_cast<ThreadData*>(arg);
+    JavaVM* vm = JSC::Bindings::getJavaVM();
+    JNIEnv* env;
+    void* ret = 0;
+    if (vm->AttachCurrentThread(&env, 0) == JNI_OK) {
+        ret = data->entryPoint(data->arg);
+        vm->DetachCurrentThread();
+    }
+    delete data;
+    return ret;
+}
+
+ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, const char*)
+{
+    pthread_t threadHandle;
+    ThreadData* threadData = new ThreadData;
+    threadData->entryPoint = entryPoint;
+    threadData->arg = data;
+
+    if (pthread_create(&threadHandle, 0, runThreadWithRegistration, static_cast<void*>(threadData))) {
+        LOG_ERROR("Failed to create pthread at entry point %p with data %p", entryPoint, data);
+        delete threadData;
+        return 0;
+    }
+    return establishIdentifierForPthreadHandle(threadHandle);
+}
+#else
 ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, const char*)
 {
     pthread_t threadHandle;
@@ -140,6 +180,7 @@ ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, con
 
     return establishIdentifierForPthreadHandle(threadHandle);
 }
+#endif
 
 int waitForThreadCompletion(ThreadIdentifier threadID, void** result)
 {
-- 
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