Merge 6168:6800 from bleeding_edge to experimental/gc branch.

src/platform-solaris.cc

 // Copyright 2006-2009 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 27 matching lines @@
 #include <ucontext.h>  // walkstack(), getcontext()
 #include <dlfcn.h>     // dladdr
 #include <pthread.h>
 #include <sched.h>  // for sched_yield
 #include <semaphore.h>
 #include <time.h>
 #include <sys/time.h>  // gettimeofday(), timeradd()
 #include <errno.h>
 #include <ieeefp.h>  // finite()
 #include <signal.h>  // sigemptyset(), etc
+#include <sys/kdi_regs.h>
 
 
 #undef MAP_TYPE
 
 #include "v8.h"
 
 #include "platform.h"
 #include "vm-state-inl.h"
 
 
@@ skipping 160 matching lines @@
   asm("int $3");
 }
 
 
 class PosixMemoryMappedFile : public OS::MemoryMappedFile {
  public:
   PosixMemoryMappedFile(FILE* file, void* memory, int size)
     : file_(file), memory_(memory), size_(size) { }
   virtual ~PosixMemoryMappedFile();
   virtual void* memory() { return memory_; }
+  virtual int size() { return size_; }
  private:
   FILE* file_;
   void* memory_;
   int size_;
 };
 
 
+OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) {
+  FILE* file = fopen(name, "w+");
+  if (file == NULL) return NULL;
+
+  fseek(file, 0, SEEK_END);
+  int size = ftell(file);
+
+  void* memory =
+      mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fileno(file), 0);
+  return new PosixMemoryMappedFile(file, memory, size);
+}
+
+
 OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size,
     void* initial) {
   FILE* file = fopen(name, "w+");
   if (file == NULL) return NULL;
   int result = fwrite(initial, size, 1, file);
   if (result < 1) {
     fclose(file);
     return NULL;
   }
   void* memory =
@@ skipping 241 matching lines @@
     pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
     pthread_mutex_init(&mutex_, &attr);
   }
 
   ~SolarisMutex() { pthread_mutex_destroy(&mutex_); }
 
   int Lock() { return pthread_mutex_lock(&mutex_); }
 
   int Unlock() { return pthread_mutex_unlock(&mutex_); }
 
+  virtual bool TryLock() {
+    int result = pthread_mutex_trylock(&mutex_);
+    // Return false if the lock is busy and locking failed.
+    if (result == EBUSY) {
+      return false;
+    }
+    ASSERT(result == 0);  // Verify no other errors.
+    return true;
+  }
+
  private:
   pthread_mutex_t mutex_;
 };
 
 
 Mutex* OS::CreateMutex() {
   return new SolarisMutex();
 }
 
 
@@ skipping 71 matching lines @@
 
 
 Semaphore* OS::CreateSemaphore(int count) {
   return new SolarisSemaphore(count);
 }
 
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 
 static Sampler* active_sampler_ = NULL;
+static pthread_t vm_tid_ = 0;
+
 
 static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
   USE(info);
   if (signal != SIGPROF) return;
-  if (active_sampler_ == NULL) return;
+  if (active_sampler_ == NULL || !active_sampler_->IsActive()) return;
+  if (vm_tid_ != pthread_self()) return;
 
-  TickSample sample;
-  sample.pc = 0;
-  sample.sp = 0;
-  sample.fp = 0;
+  TickSample sample_obj;
+  TickSample* sample = CpuProfiler::TickSampleEvent();
+  if (sample == NULL) sample = &sample_obj;
 
-  // We always sample the VM state.
-  sample.state = VMState::current_state();
+  // Extracting the sample from the context is extremely machine dependent.
+  ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
+  mcontext_t& mcontext = ucontext->uc_mcontext;
+  sample->state = Top::current_vm_state();
 
-  active_sampler_->Tick(&sample);
+#if V8_HOST_ARCH_IA32
+  sample->pc = reinterpret_cast<Address>(mcontext.gregs[KDIREG_EIP]);
+  sample->sp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_ESP]);
+  sample->fp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_EBP]);
+#elif V8_HOST_ARCH_X64
+  sample->pc = reinterpret_cast<Address>(mcontext.gregs[KDIREG_RIP]);
+  sample->sp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_RSP]);
+  sample->fp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_RBP]);
+#else
+  UNIMPLEMENTED();
+#endif
+  active_sampler_->SampleStack(sample);
+  active_sampler_->Tick(sample);
 }
 
 
 class Sampler::PlatformData : public Malloced {
  public:
   PlatformData() {
     signal_handler_installed_ = false;
   }
 
   bool signal_handler_installed_;
@@ skipping 52 matching lines @@
   }
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal