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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/shared_impl/ppb_trace_event_impl.h"
#include "base/basictypes.h"
#include "base/debug/trace_event.h"
#include "base/threading/platform_thread.h"
#include "ppapi/thunk/thunk.h"
namespace ppapi {
// PPB_Trace_Event_Dev is a shared implementation because Trace Events can be
// sent from either the plugin process or renderer process depending on whether
// the plugin is in- or out-of-process. Also, for NaCl plugins these functions
// will be executed from untrusted code and handled appropriately by tracing
// functionality in the IRT.
// static
void* TraceEventImpl::GetCategoryEnabled(const char* category_name) {
// This casting is here because all mem_t return types in Pepper are void* and
// non-const. All mem_t parameters are const void* so there is no way to
// return a pointer type to the caller without some const_cast. The pointer
// type the tracing system works with is normally unsigned char*.
return const_cast<void*>(static_cast<const void*>(
base::debug::TraceLog::GetInstance()->GetCategoryGroupEnabled(
category_name)));
}
// static
void TraceEventImpl::AddTraceEvent(
int8_t phase,
const void* category_enabled,
const char* name,
uint64_t id,
uint32_t num_args,
const char* arg_names[],
const uint8_t arg_types[],
const uint64_t arg_values[],
uint8_t flags) {
COMPILE_ASSERT(sizeof(unsigned long long) == sizeof(uint64_t), msg);
base::debug::TraceLog::GetInstance()->AddTraceEvent(phase,
static_cast<const unsigned char*>(category_enabled), name, id, num_args,
arg_names, arg_types,
// This cast is necessary for LP64 systems, where uint64_t is defined as
// an unsigned long int, but trace_event internals are hermetic and
// accepts an |unsigned long long*|. The pointer types are compatible but
// the compiler throws an error without an explicit cast.
reinterpret_cast<const unsigned long long*>(arg_values), NULL, flags);
}
// static
void TraceEventImpl::AddTraceEventWithThreadIdAndTimestamp(
int8_t phase,
const void* category_enabled,
const char* name,
uint64_t id,
int32_t thread_id,
int64_t timestamp,
uint32_t num_args,
const char* arg_names[],
const uint8_t arg_types[],
const uint64_t arg_values[],
uint8_t flags) {
base::debug::TraceLog::GetInstance()->AddTraceEventWithThreadIdAndTimestamp(
phase,
static_cast<const unsigned char*>(category_enabled), name, id,
thread_id,
base::TimeTicks::FromInternalValue(timestamp),
num_args, arg_names, arg_types,
// This cast is necessary for LP64 systems, where uint64_t is defined as
// an unsigned long int, but trace_event internals are hermetic and
// accepts an |unsigned long long*|. The pointer types are compatible but
// the compiler throws an error without an explicit cast.
reinterpret_cast<const unsigned long long*>(arg_values), NULL, flags);
}
// static
int64_t TraceEventImpl::Now() {
return base::TimeTicks::NowFromSystemTraceTime().ToInternalValue();
}
// static
void TraceEventImpl::SetThreadName(const char* thread_name) {
base::PlatformThread::SetName(thread_name);
}
namespace {
const PPB_Trace_Event_Dev_0_1 g_ppb_trace_event_thunk_0_1 = {
&TraceEventImpl::GetCategoryEnabled,
&TraceEventImpl::AddTraceEvent,
&TraceEventImpl::SetThreadName,
};
const PPB_Trace_Event_Dev_0_2 g_ppb_trace_event_thunk_0_2 = {
&TraceEventImpl::GetCategoryEnabled,
&TraceEventImpl::AddTraceEvent,
&TraceEventImpl::AddTraceEventWithThreadIdAndTimestamp,
&TraceEventImpl::Now,
&TraceEventImpl::SetThreadName,
};
} // namespace ppapi
} // namespace
namespace ppapi {
namespace thunk {
const PPB_Trace_Event_Dev_0_1* GetPPB_Trace_Event_Dev_0_1_Thunk() {
return &g_ppb_trace_event_thunk_0_1;
}
const PPB_Trace_Event_Dev_0_2* GetPPB_Trace_Event_Dev_0_2_Thunk() {
return &g_ppb_trace_event_thunk_0_2;
}
} // namespace thunk
} // namespace ppapi
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