Fix cctest/test-cpu-profiler/CollectCpuProfile test on Arm and MIPS simulators

src/platform-freebsd.cc

Index: src/platform-freebsd.cc
diff --git a/src/platform-freebsd.cc b/src/platform-freebsd.cc
index 57d49b699aeb25dced614df62a2957b8c5111e01..baab4714b9d05bce55982e8722a8b52d6819883c 100644
--- a/src/platform-freebsd.cc
+++ b/src/platform-freebsd.cc
@@ -56,6 +56,7 @@
 
 #include "platform-posix.h"
 #include "platform.h"
+#include "simulator.h"
 #include "vm-state-inl.h"
 
 
@@ -690,12 +691,16 @@ static pthread_t GetThreadID() {
 
 class Sampler::PlatformData : public Malloced {
  public:
-  PlatformData() : vm_tid_(GetThreadID()) {}
+  PlatformData()
+      : vm_tid_(GetThreadID()),
+        profiled_thread_id_(ThreadId::Current()) {}
 
   pthread_t vm_tid() const { return vm_tid_; }
+  ThreadId profiled_thread_id() { return profiled_thread_id_; }
 
  private:
   pthread_t vm_tid_;
+  ThreadId profiled_thread_id_;
 };
 
 
@@ -715,6 +720,18 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
   Sampler* sampler = isolate->logger()->sampler();
   if (sampler == NULL || !sampler->IsActive()) return;
 
+#if defined(USE_SIMULATOR)
+#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS
+  ThreadId thread_id = sampler->platform_data()->profiled_thread_id();
+  Isolate::PerIsolateThreadData* per_thread_data = isolate->
+      FindPerThreadDataForThread(thread_id);
+  if (!per_thread_data) return;
+  Simulator* sim = per_thread_data->simulator();
+  // Check if there is active simulator before allocating TickSample.
+  if (!sim) return;
+#endif
+#endif  // USE_SIMULATOR
+
   TickSample sample_obj;
   TickSample* sample = isolate->cpu_profiler()->TickSampleEvent();
   if (sample == NULL) sample = &sample_obj;
@@ -723,6 +740,17 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
   ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
   mcontext_t& mcontext = ucontext->uc_mcontext;
   sample->state = isolate->current_vm_state();
+#if defined(USE_SIMULATOR)
+#if V8_TARGET_ARCH_ARM
+  sample->pc = reinterpret_cast<Address>(sim->get_register(Simulator::pc));
+  sample->sp = reinterpret_cast<Address>(sim->get_register(Simulator::sp));
+  sample->fp = reinterpret_cast<Address>(sim->get_register(Simulator::r11));
+#elif V8_TARGET_ARCH_MIPS
+  sample->pc = reinterpret_cast<Address>(sim->get_register(Simulator::pc));
+  sample->sp = reinterpret_cast<Address>(sim->get_register(Simulator::sp));
+  sample->fp = reinterpret_cast<Address>(sim->get_register(Simulator::fp));
+#endif
+#else
 #if V8_HOST_ARCH_IA32
   sample->pc = reinterpret_cast<Address>(mcontext.mc_eip);
   sample->sp = reinterpret_cast<Address>(mcontext.mc_esp);
@@ -735,7 +763,8 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
   sample->pc = reinterpret_cast<Address>(mcontext.mc_r15);
   sample->sp = reinterpret_cast<Address>(mcontext.mc_r13);
   sample->fp = reinterpret_cast<Address>(mcontext.mc_r11);
-#endif
+#endif  // V8_HOST_ARCH_*
+#endif  // USE_SIMULATOR
   sampler->SampleStack(sample);
   sampler->Tick(sample);
 }