Fuchsia: Platform specific calls needed to Initialize and Cleanup VM.

runtime/vm/os_fuchsia.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_OS_FUCHSIA)
 
 #include "vm/os.h"
 
 #include <magenta/syscalls.h>
 #include <magenta/types.h>
 
 #include "platform/assert.h"
+#include "vm/zone.h"
 
 namespace dart {
 
 const char* OS::Name() {
   return "fuchsia";
 }
 
 
 intptr_t OS::ProcessId() {
   UNIMPLEMENTED();
@@ skipping 23 matching lines @@
   return GetCurrentTimeMicros() / 1000;
 }
 
 
 int64_t OS::GetCurrentTimeMicros() {
   return _magenta_current_time() / 1000;
 }
 
 
 int64_t OS::GetCurrentMonotonicTicks() {
-  UNIMPLEMENTED();
-  return 0;
+  return _magenta_current_time();
 }
 
 
 int64_t OS::GetCurrentMonotonicFrequency() {
-  UNIMPLEMENTED();
-  return 0;
+  return kNanosecondsPerSecond;
 }
 
 
 int64_t OS::GetCurrentMonotonicMicros() {
-  UNIMPLEMENTED();
-  return 0;
+  int64_t ticks = GetCurrentMonotonicTicks();
+  ASSERT(GetCurrentMonotonicFrequency() == kNanosecondsPerSecond);
+  return ticks / kNanosecondsPerMicrosecond;
 }
 
 
 int64_t OS::GetCurrentThreadCPUMicros() {
   UNIMPLEMENTED();
   return 0;
 }
 
 
 void* OS::AlignedAllocate(intptr_t size, intptr_t alignment) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 void OS::AlignedFree(void* ptr) {
   UNIMPLEMENTED();
 }
 
 
 // TODO(5411554):  May need to hoist these architecture dependent code
 // into a architecture specific file e.g: os_ia32_linux.cc

[siva, 2016/07/13 00:27:16]

the comment seems inaccurate (os_ia32_fuschia.cc) ??

[zra, 2016/07/13 16:04:33]

Done.

 intptr_t OS::ActivationFrameAlignment() {
-  UNIMPLEMENTED();
-  return 0;
+#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64) || \
+    defined(TARGET_ARCH_ARM64)
+  const int kMinimumAlignment = 16;
+#elif defined(TARGET_ARCH_ARM) || defined(TARGET_ARCH_DBC)
+  const int kMinimumAlignment = 8;
+#else
+#error Unsupported architecture.
+#endif
+  intptr_t alignment = kMinimumAlignment;
+  // TODO(5411554): Allow overriding default stack alignment for
+  // testing purposes.
+  // Flags::DebugIsInt("stackalign", &alignment);
+  ASSERT(Utils::IsPowerOfTwo(alignment));
+  ASSERT(alignment >= kMinimumAlignment);
+  return alignment;
 }
 
 
 intptr_t OS::PreferredCodeAlignment() {
-  UNIMPLEMENTED();
-  return 0;
+#if defined(TARGET_ARCH_IA32) ||                                               \
+    defined(TARGET_ARCH_X64) ||                                                \
+    defined(TARGET_ARCH_ARM64) ||                                              \
+    defined(TARGET_ARCH_DBC)
+  const int kMinimumAlignment = 32;
+#elif defined(TARGET_ARCH_ARM) || defined(TARGET_ARCH_MIPS)
+  const int kMinimumAlignment = 16;
+#else
+#error Unsupported architecture.
+#endif
+  intptr_t alignment = kMinimumAlignment;
+  // TODO(5411554): Allow overriding default code alignment for
+  // testing purposes.
+  // Flags::DebugIsInt("codealign", &alignment);
+  ASSERT(Utils::IsPowerOfTwo(alignment));
+  ASSERT(alignment >= kMinimumAlignment);
+  ASSERT(alignment <= OS::kMaxPreferredCodeAlignment);
+  return alignment;
 }
 
 
 bool OS::AllowStackFrameIteratorFromAnotherThread() {
   UNIMPLEMENTED();
   return false;
 }
 
 
 int OS::NumberOfAvailableProcessors() {
@@ skipping 34 matching lines @@
 }
 
 
 void OS::VFPrint(FILE* stream, const char* format, va_list args) {
   vfprintf(stream, format, args);
   fflush(stream);
 }
 
 
 int OS::SNPrint(char* str, size_t size, const char* format, ...) {
-  UNIMPLEMENTED();
-  return 0;
+  va_list args;
+  va_start(args, format);
+  int retval = VSNPrint(str, size, format, args);
+  va_end(args);
+  return retval;
 }
 
 
 int OS::VSNPrint(char* str, size_t size, const char* format, va_list args) {
-  UNIMPLEMENTED();
-  return 0;
+  int retval = vsnprintf(str, size, format, args);
+  if (retval < 0) {
+    FATAL1("Fatal error in OS::VSNPrint with format '%s'", format);
+  }
+  return retval;
 }
 
 
 char* OS::SCreate(Zone* zone, const char* format, ...) {
-  UNIMPLEMENTED();
-  return NULL;
+  va_list args;
+  va_start(args, format);
+  char* buffer = VSCreate(zone, format, args);
+  va_end(args);
+  return buffer;
 }
 
 
 char* OS::VSCreate(Zone* zone, const char* format, va_list args) {
-  UNIMPLEMENTED();
-  return NULL;
+  // Measure.
+  va_list measure_args;
+  va_copy(measure_args, args);
+  intptr_t len = VSNPrint(NULL, 0, format, measure_args);
+  va_end(measure_args);
+
+  char* buffer;
+  if (zone) {
+    buffer = zone->Alloc<char>(len + 1);
+  } else {
+    buffer = reinterpret_cast<char*>(malloc(len + 1));
+  }
+  ASSERT(buffer != NULL);
+
+  // Print.
+  va_list print_args;
+  va_copy(print_args, args);
+  VSNPrint(buffer, len + 1, format, print_args);
+  va_end(print_args);
+  return buffer;
 }
 
 
 bool OS::StringToInt64(const char* str, int64_t* value) {
   UNIMPLEMENTED();
   return false;
 }
 
 
 void OS::RegisterCodeObservers() {
@@ skipping 28 matching lines @@
 }
 
 
 void OS::Exit(int code) {
   UNIMPLEMENTED();
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_FUCHSIA)