Updated JavaScriptCore from /home/khansen/dev/qtwebkit-qtscript-integration to javascriptcore-snapshot-16062010 ( 8b2d3443afca194f8ac50a63151dc9d19a150582 )

Integrated changes:

|| <https://webkit.org/b/37195> || JSC's currentThreadStackBase is not reentrant on some platforms

3 files changed, 29 insertions, 10 deletions

diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog b/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog
index fd6125f..b0873ab 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/ChangeLog
@@ -12,6 +12,23 @@
 
         * wtf/Platform.h:
 
+2010-04-28  Simon Hausmann  <simon.hausmann@nokia.com>, Kent Hansen <kent.hansen@nokia.com>
+
+        Reviewed by Darin Adler.
+
+        JSC's currentThreadStackBase is not reentrant on some platforms
+        https://bugs.webkit.org/show_bug.cgi?id=37195
+
+        This function needs to be reentrant to avoid memory corruption on platforms where
+        the implementation uses global variables.
+
+        This patch adds a mutex lock where necessary and makes the Symbian implementation
+        reentrant.
+
+        * runtime/Collector.cpp:
+        (JSC::currentThreadStackBaseMutex):
+        (JSC::currentThreadStackBase):
+
 2010-04-14  Kent Hansen  <kent.hansen@nokia.com>
 
         Reviewed by Maciej Stachowiak.
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp
index 57f2a92..eafcc23 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp
@@ -637,6 +637,8 @@ static inline void* currentThreadStackBase()
 #elif OS(HPUX)
     return hpux_get_stack_base();
 #elif OS(QNX)
+    AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
+    MutexLocker locker(mutex);
     return currentThreadStackBaseQNX();
 #elif OS(SOLARIS)
     stack_t s;
@@ -660,19 +662,17 @@ static inline void* currentThreadStackBase()
     pthread_stackseg_np(thread, &stack);
     return stack.ss_sp;
 #elif OS(SYMBIAN)
-    static void* stackBase = 0;
-    if (stackBase == 0) {
-        TThreadStackInfo info;
-        RThread thread;
-        thread.StackInfo(info);
-        stackBase = (void*)info.iBase;
-    }
-    return (void*)stackBase;
+    TThreadStackInfo info;
+    RThread thread;
+    thread.StackInfo(info);
+    return (void*)info.iBase;
 #elif OS(HAIKU)
     thread_info threadInfo;
     get_thread_info(find_thread(NULL), &threadInfo);
     return threadInfo.stack_end;
 #elif OS(UNIX)
+    AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
+    MutexLocker locker(mutex);
     static void* stackBase = 0;
     static size_t stackSize = 0;
     static pthread_t stackThread;
@@ -695,6 +695,8 @@ static inline void* currentThreadStackBase()
     }
     return static_cast<char*>(stackBase) + stackSize;
 #elif OS(WINCE)
+    AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
+    MutexLocker locker(mutex);
     if (g_stackBase)
         return g_stackBase;
     else {
diff --git a/src/3rdparty/javascriptcore/VERSION b/src/3rdparty/javascriptcore/VERSION
index 1b5109a..daecc37 100644
--- a/src/3rdparty/javascriptcore/VERSION
+++ b/src/3rdparty/javascriptcore/VERSION
@@ -4,8 +4,8 @@ This is a snapshot of JavaScriptCore from
 
 The commit imported was from the
 
-        javascriptcore-snapshot-19052010 branch/tag
+        javascriptcore-snapshot-16062010 branch/tag
 
 and has the sha1 checksum
 
-        8039ba79702d6516cf6841c9f15b324ec499bbf3
+        8b2d3443afca194f8ac50a63151dc9d19a150582