gecko/tools/profiler/SaveProfileTask.h

112 lines
3.1 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef PROFILER_SAVETASK_H_
#define PROFILER_SAVETASK_H_
#include "platform.h"
#include "nsThreadUtils.h"
#include "nsIXULRuntime.h"
#include "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsXULAppAPI.h"
#include "nsIJSRuntimeService.h"
#ifdef XP_WIN
#include <windows.h>
#define getpid GetCurrentProcessId
#else
#include <unistd.h>
#endif
static JSBool
WriteCallback(const jschar *buf, uint32_t len, void *data)
{
std::ofstream& stream = *static_cast<std::ofstream*>(data);
nsAutoCString profile = NS_ConvertUTF16toUTF8(buf, len);
stream << profile.Data();
return JS_TRUE;
}
/**
* This is an event used to save the profile on the main thread
* to be sure that it is not being modified while saving.
*/
class SaveProfileTask : public nsRunnable {
public:
SaveProfileTask() {}
NS_IMETHOD Run() {
// Get file path
# if defined(SPS_PLAT_arm_android) && !defined(MOZ_WIDGET_GONK)
nsCString tmpPath;
tmpPath.AppendPrintf("/sdcard/profile_%i_%i.txt", XRE_GetProcessType(), getpid());
# else
nsCOMPtr<nsIFile> tmpFile;
nsAutoCString tmpPath;
if (NS_FAILED(NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tmpFile)))) {
LOG("Failed to find temporary directory.");
return NS_ERROR_FAILURE;
}
tmpPath.AppendPrintf("profile_%i_%i.txt", XRE_GetProcessType(), getpid());
nsresult rv = tmpFile->AppendNative(tmpPath);
if (NS_FAILED(rv))
return rv;
rv = tmpFile->GetNativePath(tmpPath);
if (NS_FAILED(rv))
return rv;
# endif
// Create a JSContext to run a JSObjectBuilder :(
// Based on XPCShellEnvironment
JSRuntime *rt;
JSContext *cx;
nsCOMPtr<nsIJSRuntimeService> rtsvc
= do_GetService("@mozilla.org/js/xpc/RuntimeService;1");
if (!rtsvc || NS_FAILED(rtsvc->GetRuntime(&rt)) || !rt) {
LOG("failed to get RuntimeService");
return NS_ERROR_FAILURE;;
}
cx = JS_NewContext(rt, 8192);
if (!cx) {
LOG("Failed to get context");
return NS_ERROR_FAILURE;
}
{
JSAutoRequest ar(cx);
static JSClass c = {
"global", JSCLASS_GLOBAL_FLAGS,
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub
};
JSObject *obj = JS_NewGlobalObject(cx, &c, NULL);
std::ofstream stream;
stream.open(tmpPath.get());
if (stream.is_open()) {
JSAutoCompartment autoComp(cx, obj);
JSObject* profileObj = profiler_get_profile_jsobject(cx);
jsval val = OBJECT_TO_JSVAL(profileObj);
JS_Stringify(cx, &val, nullptr, JSVAL_NULL, WriteCallback, &stream);
stream.close();
LOGF("Saved to %s", tmpPath.get());
} else {
LOGF("Fail to open profile log file '%s'.", tmpPath.get());
}
}
JS_EndRequest(cx);
JS_DestroyContext(cx);
return NS_OK;
}
};
#endif