Merge 6095:6198 from bleeding_edge to experimental/gc.

src/platform-linux.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Platform specific code for Linux goes here. For the POSIX comaptible parts
 // the implementation is in platform-posix.cc.
 
 #include <pthread.h>
 #include <semaphore.h>
 #include <signal.h>
+#include <sys/prctl.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
 #include <stdlib.h>
 
 // Ubuntu Dapper requires memory pages to be marked as
 // executable. Otherwise, OS raises an exception when executing code
 // in that page.
 #include <sys/types.h>  // mmap & munmap
@@ skipping 533 matching lines @@
   return pthread_equal(data_->thread_, pthread_self());
 }
 
 
 bool ThreadHandle::IsValid() const {
   return data_->thread_ != kNoThread;
 }
 
 
 Thread::Thread() : ThreadHandle(ThreadHandle::INVALID) {
+  set_name("v8:<unknown>");
+}
+
+
+Thread::Thread(const char* name) : ThreadHandle(ThreadHandle::INVALID) {
+  set_name(name);
 }
 
 
 Thread::~Thread() {
 }
 
 
 static void* ThreadEntry(void* arg) {
   Thread* thread = reinterpret_cast<Thread*>(arg);
   // This is also initialized by the first argument to pthread_create() but we
   // don't know which thread will run first (the original thread or the new
   // one) so we initialize it here too.
+  prctl(PR_SET_NAME, thread->name(), 0, 0, 0);
   thread->thread_handle_data()->thread_ = pthread_self();
   ASSERT(thread->IsValid());
   thread->Run();
   return NULL;
 }
 
 
+void Thread::set_name(const char* name) {
+  strncpy(name_, name, sizeof(name_));
+  name_[sizeof(name_) - 1] = '\0';
+}
+
+
 void Thread::Start() {
   pthread_create(&thread_handle_data()->thread_, NULL, ThreadEntry, this);
   ASSERT(IsValid());
 }
 
 
 void Thread::Join() {
   pthread_join(thread_handle_data()->thread_, NULL);
 }
 
@@ skipping 361 matching lines @@
   }
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal