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android / platform / external / chromium_org / ba5b9a6 / . / ppapi / native_client / src / trusted / plugin / plugin.cc
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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.
#ifdef _MSC_VER
// Do not warn about use of std::copy with raw pointers.
#pragma warning(disable : 4996)
#endif
#include "ppapi/native_client/src/trusted/plugin/plugin.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <algorithm>
#include <deque>
#include <string>
#include <vector>
#include "native_client/src/include/nacl_base.h"
#include "native_client/src/include/nacl_macros.h"
#include "native_client/src/include/nacl_scoped_ptr.h"
#include "native_client/src/include/nacl_string.h"
#include "native_client/src/include/portability.h"
#include "native_client/src/include/portability_io.h"
#include "native_client/src/include/portability_string.h"
#include "native_client/src/shared/platform/nacl_check.h"
#include "native_client/src/trusted/desc/nacl_desc_wrapper.h"
#include "native_client/src/trusted/nonnacl_util/sel_ldr_launcher.h"
#include "native_client/src/trusted/service_runtime/nacl_error_code.h"
#include "ppapi/c/dev/ppp_find_dev.h"
#include "ppapi/c/dev/ppp_printing_dev.h"
#include "ppapi/c/dev/ppp_selection_dev.h"
#include "ppapi/c/dev/ppp_zoom_dev.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/ppb_console.h"
#include "ppapi/c/ppb_var.h"
#include "ppapi/c/ppp_input_event.h"
#include "ppapi/c/ppp_instance.h"
#include "ppapi/c/ppp_mouse_lock.h"
#include "ppapi/c/private/ppb_nacl_private.h"
#include "ppapi/c/private/ppb_uma_private.h"
#include "ppapi/cpp/dev/find_dev.h"
#include "ppapi/cpp/dev/printing_dev.h"
#include "ppapi/cpp/dev/selection_dev.h"
#include "ppapi/cpp/dev/url_util_dev.h"
#include "ppapi/cpp/dev/zoom_dev.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/input_event.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/mouse_lock.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/text_input_controller.h"
#include "ppapi/native_client/src/trusted/plugin/file_utils.h"
#include "ppapi/native_client/src/trusted/plugin/json_manifest.h"
#include "ppapi/native_client/src/trusted/plugin/module_ppapi.h"
#include "ppapi/native_client/src/trusted/plugin/nacl_entry_points.h"
#include "ppapi/native_client/src/trusted/plugin/nacl_subprocess.h"
#include "ppapi/native_client/src/trusted/plugin/nexe_arch.h"
#include "ppapi/native_client/src/trusted/plugin/plugin_error.h"
#include "ppapi/native_client/src/trusted/plugin/scriptable_plugin.h"
#include "ppapi/native_client/src/trusted/plugin/service_runtime.h"
#include "ppapi/native_client/src/trusted/plugin/utility.h"
namespace plugin {
namespace {
const char* const kTypeAttribute = "type";
// The "src" attribute of the <embed> tag. The value is expected to be either
// a URL or URI pointing to the manifest file (which is expected to contain
// JSON matching ISAs with .nexe URLs).
const char* const kSrcManifestAttribute = "src";
// The "nacl" attribute of the <embed> tag. We use the value of this attribute
// to find the manifest file when NaCl is registered as a plug-in for another
// MIME type because the "src" attribute is used to supply us with the resource
// of that MIME type that we're supposed to display.
const char* const kNaClManifestAttribute = "nacl";
// The pseudo-ISA used to indicate portable native client.
const char* const kPortableISA = "portable";
// This is a pretty arbitrary limit on the byte size of the NaCl manfest file.
// Note that the resulting string object has to have at least one byte extra
// for the null termination character.
const size_t kNaClManifestMaxFileBytes = 1024 * 1024;
// Define an argument name to enable 'dev' interfaces. To make sure it doesn't
// collide with any user-defined HTML attribute, make the first character '@'.
const char* const kDevAttribute = "@dev";
// URL schemes that we treat in special ways.
const char* const kChromeExtensionUriScheme = "chrome-extension";
const char* const kDataUriScheme = "data";
// The key used to find the dictionary nexe URLs in the manifest file.
const char* const kNexesKey = "nexes";
// Up to 20 seconds
const int64_t kTimeSmallMin = 1; // in ms
const int64_t kTimeSmallMax = 20000; // in ms
const uint32_t kTimeSmallBuckets = 100;
// Up to 3 minutes, 20 seconds
const int64_t kTimeMediumMin = 10; // in ms
const int64_t kTimeMediumMax = 200000; // in ms
const uint32_t kTimeMediumBuckets = 100;
// Up to 33 minutes.
const int64_t kTimeLargeMin = 100; // in ms
const int64_t kTimeLargeMax = 2000000; // in ms
const uint32_t kTimeLargeBuckets = 100;
const int64_t kSizeKBMin = 1;
const int64_t kSizeKBMax = 512*1024; // very large .nexe
const uint32_t kSizeKBBuckets = 100;
const PPB_NaCl_Private* GetNaClInterface() {
pp::Module *module = pp::Module::Get();
CHECK(module);
return static_cast<const PPB_NaCl_Private*>(
module->GetBrowserInterface(PPB_NACL_PRIVATE_INTERFACE));
}
const PPB_UMA_Private* GetUMAInterface() {
pp::Module *module = pp::Module::Get();
CHECK(module);
return static_cast<const PPB_UMA_Private*>(
module->GetBrowserInterface(PPB_UMA_PRIVATE_INTERFACE));
}
void HistogramTimeSmall(const std::string& name, int64_t ms) {
if (ms < 0) return;
const PPB_UMA_Private* ptr = GetUMAInterface();
if (ptr == NULL) return;
ptr->HistogramCustomTimes(pp::Var(name).pp_var(),
ms,
kTimeSmallMin, kTimeSmallMax,
kTimeSmallBuckets);
}
void HistogramTimeMedium(const std::string& name, int64_t ms) {
if (ms < 0) return;
const PPB_UMA_Private* ptr = GetUMAInterface();
if (ptr == NULL) return;
ptr->HistogramCustomTimes(pp::Var(name).pp_var(),
ms,
kTimeMediumMin, kTimeMediumMax,
kTimeMediumBuckets);
}
void HistogramTimeLarge(const std::string& name, int64_t ms) {
if (ms < 0) return;
const PPB_UMA_Private* ptr = GetUMAInterface();
if (ptr == NULL) return;
ptr->HistogramCustomTimes(pp::Var(name).pp_var(),
ms,
kTimeLargeMin, kTimeLargeMax,
kTimeLargeBuckets);
}
void HistogramSizeKB(const std::string& name, int32_t sample) {
if (sample < 0) return;
const PPB_UMA_Private* ptr = GetUMAInterface();
if (ptr == NULL) return;
ptr->HistogramCustomCounts(pp::Var(name).pp_var(),
sample,
kSizeKBMin, kSizeKBMax,
kSizeKBBuckets);
}
void HistogramEnumerate(const std::string& name, int sample, int maximum,
int out_of_range_replacement) {
if (sample < 0 || sample >= maximum) {
if (out_of_range_replacement < 0)
// No replacement for bad input, abort.
return;
else
// Use a specific value to signal a bad input.
sample = out_of_range_replacement;
}
const PPB_UMA_Private* ptr = GetUMAInterface();
if (ptr == NULL) return;
ptr->HistogramEnumeration(pp::Var(name).pp_var(), sample, maximum);
}
void HistogramEnumerateOsArch(const std::string& sandbox_isa) {
enum NaClOSArch {
kNaClLinux32 = 0,
kNaClLinux64,
kNaClLinuxArm,
kNaClMac32,
kNaClMac64,
kNaClMacArm,
kNaClWin32,
kNaClWin64,
kNaClWinArm,
kNaClOSArchMax
};
NaClOSArch os_arch = kNaClOSArchMax;
#if NACL_LINUX
os_arch = kNaClLinux32;
#elif NACL_OSX
os_arch = kNaClMac32;
#elif NACL_WINDOWS
os_arch = kNaClWin32;
#endif
if (sandbox_isa == "x86-64")
os_arch = static_cast<NaClOSArch>(os_arch + 1);
if (sandbox_isa == "arm")
os_arch = static_cast<NaClOSArch>(os_arch + 2);
HistogramEnumerate("NaCl.Client.OSArch", os_arch, kNaClOSArchMax, -1);
}
void HistogramEnumerateLoadStatus(PluginErrorCode error_code,
bool is_installed) {
HistogramEnumerate("NaCl.LoadStatus.Plugin", error_code, ERROR_MAX,
ERROR_UNKNOWN);
// Gather data to see if being installed changes load outcomes.
const char* name = is_installed ? "NaCl.LoadStatus.Plugin.InstalledApp" :
"NaCl.LoadStatus.Plugin.NotInstalledApp";
HistogramEnumerate(name, error_code, ERROR_MAX,
ERROR_UNKNOWN);
}
void HistogramEnumerateSelLdrLoadStatus(NaClErrorCode error_code,
bool is_installed) {
HistogramEnumerate("NaCl.LoadStatus.SelLdr", error_code, NACL_ERROR_CODE_MAX,
LOAD_STATUS_UNKNOWN);
// Gather data to see if being installed changes load outcomes.
const char* name = is_installed ? "NaCl.LoadStatus.SelLdr.InstalledApp" :
"NaCl.LoadStatus.SelLdr.NotInstalledApp";
HistogramEnumerate(name, error_code, NACL_ERROR_CODE_MAX,
LOAD_STATUS_UNKNOWN);
}
void HistogramEnumerateManifestIsDataURI(bool is_data_uri) {
HistogramEnumerate("NaCl.Manifest.IsDataURI", is_data_uri, 2, -1);
}
void HistogramHTTPStatusCode(const std::string& name, int status) {
// Log the status codes in rough buckets - 1XX, 2XX, etc.
int sample = status / 100;
// HTTP status codes only go up to 5XX, using "6" to indicate an internal
// error.
// Note: installed files may have "0" for a status code.
if (status < 0 || status >= 600)
sample = 6;
HistogramEnumerate(name, sample, 7, 6);
}
} // namespace
static int const kAbiHeaderBuffer = 256; // must be at least EI_ABIVERSION + 1
void Plugin::AddPropertyGet(const nacl::string& prop_name,
Plugin::PropertyGetter getter) {
PLUGIN_PRINTF(("Plugin::AddPropertyGet (prop_name='%s')\n",
prop_name.c_str()));
property_getters_[nacl::string(prop_name)] = getter;
}
bool Plugin::HasProperty(const nacl::string& prop_name) {
PLUGIN_PRINTF(("Plugin::HasProperty (prop_name=%s)\n",
prop_name.c_str()));
return property_getters_.find(prop_name) != property_getters_.end();
}
bool Plugin::GetProperty(const nacl::string& prop_name,
NaClSrpcArg* prop_value) {
PLUGIN_PRINTF(("Plugin::GetProperty (prop_name=%s)\n", prop_name.c_str()));
if (property_getters_.find(prop_name) == property_getters_.end()) {
return false;
}
PropertyGetter getter = property_getters_[prop_name];
(this->*getter)(prop_value);
return true;
}
void Plugin::GetExitStatus(NaClSrpcArg* prop_value) {
PLUGIN_PRINTF(("GetExitStatus (this=%p)\n", reinterpret_cast<void*>(this)));
prop_value->tag = NACL_SRPC_ARG_TYPE_INT;
prop_value->u.ival = exit_status();
}
void Plugin::GetLastError(NaClSrpcArg* prop_value) {
PLUGIN_PRINTF(("GetLastError (this=%p)\n", reinterpret_cast<void*>(this)));
prop_value->tag = NACL_SRPC_ARG_TYPE_STRING;
prop_value->arrays.str = strdup(last_error_string().c_str());
}
void Plugin::GetReadyStateProperty(NaClSrpcArg* prop_value) {
PLUGIN_PRINTF(("GetReadyState (this=%p)\n", reinterpret_cast<void*>(this)));
prop_value->tag = NACL_SRPC_ARG_TYPE_INT;
prop_value->u.ival = nacl_ready_state();
}
bool Plugin::Init(int argc, char* argn[], char* argv[]) {
PLUGIN_PRINTF(("Plugin::Init (instance=%p)\n", static_cast<void*>(this)));
#ifdef NACL_OSX
// TODO(kochi): For crbug.com/102808, this is a stopgap solution for Lion
// until we expose IME API to .nexe. This disables any IME interference
// against key inputs, so you cannot use off-the-spot IME input for NaCl apps.
// This makes discrepancy among platforms and therefore we should remove
// this hack when IME API is made available.
// The default for non-Mac platforms is still off-the-spot IME mode.
pp::TextInputController(this).SetTextInputType(PP_TEXTINPUT_TYPE_NONE);
#endif
// Remember the embed/object argn/argv pairs.
argn_ = new char*[argc];
argv_ = new char*[argc];
argc_ = 0;
for (int i = 0; i < argc; ++i) {
if (NULL != argn_ && NULL != argv_) {
argn_[argc_] = strdup(argn[i]);
argv_[argc_] = strdup(argv[i]);
if (NULL == argn_[argc_] || NULL == argv_[argc_]) {
// Give up on passing arguments.
free(argn_[argc_]);
free(argv_[argc_]);
continue;
}
++argc_;
}
}
// TODO(sehr): this leaks strings if there is a subsequent failure.
// Set up the factory used to produce DescWrappers.
wrapper_factory_ = new nacl::DescWrapperFactory();
if (NULL == wrapper_factory_) {
return false;
}
PLUGIN_PRINTF(("Plugin::Init (wrapper_factory=%p)\n",
static_cast<void*>(wrapper_factory_)));
// Export a property to allow us to get the exit status of a nexe.
AddPropertyGet("exitStatus", &Plugin::GetExitStatus);
// Export a property to allow us to get the last error description.
AddPropertyGet("lastError", &Plugin::GetLastError);
// Export a property to allow us to get the ready state of a nexe during load.
AddPropertyGet("readyState", &Plugin::GetReadyStateProperty);
PLUGIN_PRINTF(("Plugin::Init (return 1)\n"));
// Return success.
return true;
}
void Plugin::ShutDownSubprocesses() {
PLUGIN_PRINTF(("Plugin::ShutDownSubprocesses (this=%p)\n",
static_cast<void*>(this)));
PLUGIN_PRINTF(("Plugin::ShutDownSubprocesses (%s)\n",
main_subprocess_.detailed_description().c_str()));
// Shut down service runtime. This must be done before all other calls so
// they don't block forever when waiting for the upcall thread to exit.
main_subprocess_.Shutdown();
PLUGIN_PRINTF(("Plugin::ShutDownSubprocess (this=%p, return)\n",
static_cast<void*>(this)));
}
void Plugin::StartSelLdrOnMainThread(int32_t pp_error,
ServiceRuntime* service_runtime,
const SelLdrStartParams& params,
bool* success) {
if (pp_error != PP_OK) {
PLUGIN_PRINTF(("Plugin::StartSelLdrOnMainThread: non-PP_OK arg "
"-- SHOULD NOT HAPPEN\n"));
*success = false;
return;
}
*success = service_runtime->StartSelLdr(params);
// Signal outside of StartSelLdr here, so that the write to *success
// is done before signaling.
service_runtime->SignalStartSelLdrDone();
}
bool Plugin::LoadNaClModuleCommon(nacl::DescWrapper* wrapper,
NaClSubprocess* subprocess,
const Manifest* manifest,
bool should_report_uma,
const SelLdrStartParams& params,
const pp::CompletionCallback& init_done_cb,
const pp::CompletionCallback& crash_cb) {
ServiceRuntime* new_service_runtime =
new ServiceRuntime(this, manifest, should_report_uma, init_done_cb,
crash_cb);
subprocess->set_service_runtime(new_service_runtime);
PLUGIN_PRINTF(("Plugin::LoadNaClModuleCommon (service_runtime=%p)\n",
static_cast<void*>(new_service_runtime)));
if (NULL == new_service_runtime) {
params.error_info->SetReport(
ERROR_SEL_LDR_INIT,
"sel_ldr init failure " + subprocess->description());
return false;
}
// Now start the SelLdr instance. This must be created on the main thread.
pp::Core* core = pp::Module::Get()->core();
bool service_runtime_started;
if (core->IsMainThread()) {
StartSelLdrOnMainThread(PP_OK, new_service_runtime, params,
&service_runtime_started);
} else {
pp::CompletionCallback callback =
callback_factory_.NewCallback(&Plugin::StartSelLdrOnMainThread,
new_service_runtime, params,
&service_runtime_started);
core->CallOnMainThread(0, callback, 0);
new_service_runtime->WaitForSelLdrStart();
}
PLUGIN_PRINTF(("Plugin::LoadNaClModuleCommon (service_runtime_started=%d)\n",
service_runtime_started));
if (!service_runtime_started) {
return false;
}
// Now actually load the nexe, which can happen on a background thread.
bool nexe_loaded = new_service_runtime->LoadNexeAndStart(wrapper,
params.error_info,
crash_cb);
PLUGIN_PRINTF(("Plugin::LoadNaClModuleCommon (nexe_loaded=%d)\n",
nexe_loaded));
if (!nexe_loaded) {
return false;
}
return true;
}
bool Plugin::LoadNaClModule(nacl::DescWrapper* wrapper,
ErrorInfo* error_info,
bool enable_dyncode_syscalls,
bool enable_exception_handling,
const pp::CompletionCallback& init_done_cb,
const pp::CompletionCallback& crash_cb) {
// Before forking a new sel_ldr process, ensure that we do not leak
// the ServiceRuntime object for an existing subprocess, and that any
// associated listener threads do not go unjoined because if they
// outlive the Plugin object, they will not be memory safe.
ShutDownSubprocesses();
SelLdrStartParams params(manifest_base_url(),
error_info,
true /* uses_irt */,
true /* uses_ppapi */,
enable_dev_interfaces_,
enable_dyncode_syscalls,
enable_exception_handling);
if (!LoadNaClModuleCommon(wrapper, &main_subprocess_, manifest_.get(),
true /* should_report_uma */,
params, init_done_cb, crash_cb)) {
return false;
}
PLUGIN_PRINTF(("Plugin::LoadNaClModule (%s)\n",
main_subprocess_.detailed_description().c_str()));
return true;
}
bool Plugin::LoadNaClModuleContinuationIntern(ErrorInfo* error_info) {
if (!main_subprocess_.StartSrpcServices()) {
// The NaCl process probably crashed. On Linux, a crash causes this error,
// while on other platforms, the error is detected below, when we attempt to
// start the proxy. Report a module initialization error here, to make it
// less confusing for developers.
NaClLog(LOG_ERROR, "LoadNaClModuleContinuationIntern: "
"StartSrpcServices failed\n");
error_info->SetReport(ERROR_START_PROXY_MODULE,
"could not initialize module.");
return false;
}
PP_ExternalPluginResult ipc_result =
nacl_interface_->StartPpapiProxy(pp_instance());
if (ipc_result == PP_EXTERNAL_PLUGIN_OK) {
// Log the amound of time that has passed between the trusted plugin being
// initialized and the untrusted plugin being initialized. This is
// (roughly) the cost of using NaCl, in terms of startup time.
HistogramStartupTimeMedium(
"NaCl.Perf.StartupTime.NaClOverhead",
static_cast<float>(NaClGetTimeOfDayMicroseconds() - init_time_)
/ NACL_MICROS_PER_MILLI);
} else if (ipc_result == PP_EXTERNAL_PLUGIN_ERROR_MODULE) {
NaClLog(LOG_ERROR, "LoadNaClModuleContinuationIntern: "
"Got PP_EXTERNAL_PLUGIN_ERROR_MODULE\n");
error_info->SetReport(ERROR_START_PROXY_MODULE,
"could not initialize module.");
return false;
} else if (ipc_result == PP_EXTERNAL_PLUGIN_ERROR_INSTANCE) {
error_info->SetReport(ERROR_START_PROXY_INSTANCE,
"could not create instance.");
return false;
}
PLUGIN_PRINTF(("Plugin::LoadNaClModule (%s)\n",
main_subprocess_.detailed_description().c_str()));
return true;
}
NaClSubprocess* Plugin::LoadHelperNaClModule(nacl::DescWrapper* wrapper,
const Manifest* manifest,
ErrorInfo* error_info) {
nacl::scoped_ptr<NaClSubprocess> nacl_subprocess(
new NaClSubprocess("helper module", NULL, NULL));
if (NULL == nacl_subprocess.get()) {
error_info->SetReport(ERROR_SEL_LDR_INIT,
"unable to allocate helper subprocess.");
return NULL;
}
// Do not report UMA stats for translator-related nexes.
// TODO(sehr): define new UMA stats for translator related nexe events.
// NOTE: The PNaCl translator nexes are not built to use the IRT. This is
// done to save on address space and swap space.
// TODO(jvoung): See if we still need the uses_ppapi variable, now that
// LaunchSelLdr always happens on the main thread.
SelLdrStartParams params(manifest_base_url(),
error_info,
false /* uses_irt */,
false /* uses_ppapi */,
enable_dev_interfaces_,
false /* enable_dyncode_syscalls */,
false /* enable_exception_handling */);
if (!LoadNaClModuleCommon(wrapper, nacl_subprocess.get(), manifest,
false /* should_report_uma */,
params,
pp::BlockUntilComplete(),
pp::BlockUntilComplete())) {
return NULL;
}
// We need not wait for the init_done callback. We can block
// here in StartSrpcServices, since helper NaCl modules
// are spawned from a private thread.
//
// TODO(bsy): if helper module crashes, we should abort.
// crash_cb is not used here, so we are relying on crashes
// being detected in StartSrpcServices or later.
//
// NB: More refactoring might be needed, however, if helper
// NaCl modules have their own manifest. Currently the
// manifest is a per-plugin-instance object, not a per
// NaClSubprocess object.
if (!nacl_subprocess->StartSrpcServices()) {
error_info->SetReport(ERROR_SRPC_CONNECTION_FAIL,
"SRPC connection failure for " +
nacl_subprocess->description());
return NULL;
}
PLUGIN_PRINTF(("Plugin::LoadHelperNaClModule (%s)\n",
nacl_subprocess.get()->detailed_description().c_str()));
return nacl_subprocess.release();
}
char* Plugin::LookupArgument(const char* key) {
char** keys = argn();
for (int ii = 0, len = argc(); ii < len; ++ii) {
if (!strcmp(keys[ii], key)) {
return argv()[ii];
}
}
return NULL;
}
// Suggested names for progress event types, per
// http://www.w3.org/TR/progress-events/
const char* const Plugin::kProgressEventLoadStart = "loadstart";
const char* const Plugin::kProgressEventProgress = "progress";
const char* const Plugin::kProgressEventError = "error";
const char* const Plugin::kProgressEventAbort = "abort";
const char* const Plugin::kProgressEventLoad = "load";
const char* const Plugin::kProgressEventLoadEnd = "loadend";
// Define a NaCl specific event type for .nexe crashes.
const char* const Plugin::kProgressEventCrash = "crash";
class ProgressEvent {
public:
ProgressEvent(const char* event_type,
const nacl::string& url,
Plugin::LengthComputable length_computable,
uint64_t loaded_bytes,
uint64_t total_bytes) :
event_type_(event_type),
url_(url),
length_computable_(length_computable),
loaded_bytes_(loaded_bytes),
total_bytes_(total_bytes) { }
const char* event_type() const { return event_type_; }
const char* url() const { return url_.c_str(); }
Plugin::LengthComputable length_computable() const {
return length_computable_;
}
uint64_t loaded_bytes() const { return loaded_bytes_; }
uint64_t total_bytes() const { return total_bytes_; }
private:
// event_type_ is always passed from a string literal, so ownership is
// not taken. Hence it does not need to be deleted when ProgressEvent is
// destroyed.
const char* event_type_;
nacl::string url_;
Plugin::LengthComputable length_computable_;
uint64_t loaded_bytes_;
uint64_t total_bytes_;
};
const char* const Plugin::kNaClMIMEType = "application/x-nacl";
const char* const Plugin::kPnaclMIMEType = "application/x-pnacl";
bool Plugin::NexeIsContentHandler() const {
// Tests if the MIME type is not a NaCl MIME type.
// If the MIME type is foreign, then this NEXE is being used as a content
// type handler rather than directly by an HTML document.
return
!mime_type().empty() &&
mime_type() != kNaClMIMEType &&
mime_type() != kPnaclMIMEType;
}
Plugin* Plugin::New(PP_Instance pp_instance) {
PLUGIN_PRINTF(("Plugin::New (pp_instance=%" NACL_PRId32 ")\n", pp_instance));
Plugin* plugin = new Plugin(pp_instance);
PLUGIN_PRINTF(("Plugin::New (plugin=%p)\n", static_cast<void*>(plugin)));
if (plugin == NULL) {
return NULL;
}
return plugin;
}
// All failures of this function will show up as "Missing Plugin-in", so
// there is no need to log to JS console that there was an initialization
// failure. Note that module loading functions will log their own errors.
bool Plugin::Init(uint32_t argc, const char* argn[], const char* argv[]) {
PLUGIN_PRINTF(("Plugin::Init (argc=%" NACL_PRIu32 ")\n", argc));
HistogramEnumerateOsArch(GetSandboxISA());
init_time_ = NaClGetTimeOfDayMicroseconds();
ScriptablePlugin* scriptable_plugin = ScriptablePlugin::NewPlugin(this);
if (scriptable_plugin == NULL)
return false;
set_scriptable_plugin(scriptable_plugin);
PLUGIN_PRINTF(("Plugin::Init (scriptable_handle=%p)\n",
static_cast<void*>(scriptable_plugin_)));
url_util_ = pp::URLUtil_Dev::Get();
if (url_util_ == NULL)
return false;
PLUGIN_PRINTF(("Plugin::Init (url_util_=%p)\n",
static_cast<const void*>(url_util_)));
bool status = Plugin::Init(
static_cast<int>(argc),
// TODO(polina): Can we change the args on our end to be const to
// avoid these ugly casts?
const_cast<char**>(argn),
const_cast<char**>(argv));
if (status) {
// Look for the developer attribute; if it's present, enable 'dev'
// interfaces.
const char* dev_settings = LookupArgument(kDevAttribute);
enable_dev_interfaces_ = (dev_settings != NULL);
const char* type_attr = LookupArgument(kTypeAttribute);
if (type_attr != NULL) {
mime_type_ = nacl::string(type_attr);
std::transform(mime_type_.begin(), mime_type_.end(), mime_type_.begin(),
tolower);
}
const char* manifest_url = LookupArgument(kSrcManifestAttribute);
if (NexeIsContentHandler()) {
// For content handlers 'src' will be the URL for the content
// and 'nacl' will be the URL for the manifest.
manifest_url = LookupArgument(kNaClManifestAttribute);
// For content handlers the NEXE runs in the security context of the
// content it is rendering and the NEXE itself appears to be a
// cross-origin resource stored in a Chrome extension.
}
// Use the document URL as the base for resolving relative URLs to find the
// manifest. This takes into account the setting of <base> tags that
// precede the embed/object.
CHECK(url_util_ != NULL);
pp::Var base_var = url_util_->GetDocumentURL(this);
if (!base_var.is_string()) {
PLUGIN_PRINTF(("Plugin::Init (unable to find document url)\n"));
return false;
}
set_plugin_base_url(base_var.AsString());
if (manifest_url == NULL) {
// TODO(sehr,polina): this should be a hard error when scripting
// the src property is no longer allowed.
PLUGIN_PRINTF(("Plugin::Init:"
" WARNING: no 'src' property, so no manifest loaded.\n"));
if (NULL != LookupArgument(kNaClManifestAttribute)) {
PLUGIN_PRINTF(("Plugin::Init:"
" WARNING: 'nacl' property is incorrect. Use 'src'.\n"));
}
} else {
// Issue a GET for the manifest_url. The manifest file will be parsed to
// determine the nexe URL.
// Sets src property to full manifest URL.
RequestNaClManifest(manifest_url);
}
}
PLUGIN_PRINTF(("Plugin::Init (status=%d)\n", status));
return status;
}
Plugin::Plugin(PP_Instance pp_instance)
: pp::InstancePrivate(pp_instance),
scriptable_plugin_(NULL),
argc_(-1),
argn_(NULL),
argv_(NULL),
main_subprocess_("main subprocess", NULL, NULL),
nacl_ready_state_(UNSENT),
nexe_error_reported_(false),
wrapper_factory_(NULL),
enable_dev_interfaces_(false),
is_installed_(false),
init_time_(0),
ready_time_(0),
nexe_size_(0),
time_of_last_progress_event_(0),
nacl_interface_(NULL) {
PLUGIN_PRINTF(("Plugin::Plugin (this=%p, pp_instance=%"
NACL_PRId32 ")\n", static_cast<void*>(this), pp_instance));
callback_factory_.Initialize(this);
nexe_downloader_.Initialize(this);
nacl_interface_ = GetNaClInterface();
CHECK(nacl_interface_ != NULL);
}
Plugin::~Plugin() {
int64_t shutdown_start = NaClGetTimeOfDayMicroseconds();
PLUGIN_PRINTF(("Plugin::~Plugin (this=%p, scriptable_plugin=%p)\n",
static_cast<void*>(this),
static_cast<void*>(scriptable_plugin())));
// Destroy the coordinator while the rest of the data is still there
pnacl_coordinator_.reset(NULL);
if (!nexe_error_reported()) {
HistogramTimeLarge(
"NaCl.ModuleUptime.Normal",
(shutdown_start - ready_time_) / NACL_MICROS_PER_MILLI);
}
url_downloaders_.erase(url_downloaders_.begin(), url_downloaders_.end());
ScriptablePlugin* scriptable_plugin_ = scriptable_plugin();
ScriptablePlugin::Unref(&scriptable_plugin_);
// ShutDownSubprocesses shuts down the main subprocess, which shuts
// down the main ServiceRuntime object, which kills the subprocess.
// As a side effect of the subprocess being killed, the reverse
// services thread(s) will get EOF on the reverse channel(s), and
// the thread(s) will exit. In ServiceRuntime::Shutdown, we invoke
// ReverseService::WaitForServiceThreadsToExit(), so that there will
// not be an extent thread(s) hanging around. This means that the
// ~Plugin will block until this happens. This is a requirement,
// since the renderer should be free to unload the plugin code, and
// we cannot have threads running code that gets unloaded before
// they exit.
//
// By waiting for the threads here, we also ensure that the Plugin
// object and the subprocess and ServiceRuntime objects is not
// (fully) destroyed while the threads are running, so resources
// that are destroyed after ShutDownSubprocesses (below) are
// guaranteed to be live and valid for access from the service
// threads.
//
// The main_subprocess object, which wraps the main service_runtime
// object, is dtor'd implicitly after the explicit code below runs,
// so the main service runtime object will not have been dtor'd,
// though the Shutdown method may have been called, during the
// lifetime of the service threads.
ShutDownSubprocesses();
delete wrapper_factory_;
delete[] argv_;
delete[] argn_;
HistogramTimeSmall(
"NaCl.Perf.ShutdownTime.Total",
(NaClGetTimeOfDayMicroseconds() - shutdown_start)
/ NACL_MICROS_PER_MILLI);
PLUGIN_PRINTF(("Plugin::~Plugin (this=%p, return)\n",
static_cast<void*>(this)));
}
bool Plugin::HandleDocumentLoad(const pp::URLLoader& url_loader) {
PLUGIN_PRINTF(("Plugin::HandleDocumentLoad (this=%p)\n",
static_cast<void*>(this)));
// We don't know if the plugin will handle the document load, but return
// true in order to give it a chance to respond once the proxy is started.
return true;
}
pp::Var Plugin::GetInstanceObject() {
PLUGIN_PRINTF(("Plugin::GetInstanceObject (this=%p)\n",
static_cast<void*>(this)));
// The browser will unref when it discards the var for this object.
ScriptablePlugin* handle =
static_cast<ScriptablePlugin*>(scriptable_plugin()->AddRef());
pp::Var* handle_var = handle->var();
PLUGIN_PRINTF(("Plugin::GetInstanceObject (handle=%p, handle_var=%p)\n",
static_cast<void*>(handle), static_cast<void*>(handle_var)));
return *handle_var; // make a copy
}
void Plugin::HistogramStartupTimeSmall(const std::string& name, float dt) {
if (nexe_size_ > 0) {
float size_in_MB = static_cast<float>(nexe_size_) / (1024.f * 1024.f);
HistogramTimeSmall(name, static_cast<int64_t>(dt));
HistogramTimeSmall(name + "PerMB", static_cast<int64_t>(dt / size_in_MB));
}
}
void Plugin::HistogramStartupTimeMedium(const std::string& name, float dt) {
if (nexe_size_ > 0) {
float size_in_MB = static_cast<float>(nexe_size_) / (1024.f * 1024.f);
HistogramTimeMedium(name, static_cast<int64_t>(dt));
HistogramTimeMedium(name + "PerMB", static_cast<int64_t>(dt / size_in_MB));
}
}
void Plugin::NexeFileDidOpen(int32_t pp_error) {
PLUGIN_PRINTF(("Plugin::NexeFileDidOpen (pp_error=%" NACL_PRId32 ")\n",
pp_error));
struct NaClFileInfo info = nexe_downloader_.GetFileInfo();
PLUGIN_PRINTF(("Plugin::NexeFileDidOpen (file_desc=%" NACL_PRId32 ")\n",
info.desc));
HistogramHTTPStatusCode(
is_installed_ ?
"NaCl.HttpStatusCodeClass.Nexe.InstalledApp" :
"NaCl.HttpStatusCodeClass.Nexe.NotInstalledApp",
nexe_downloader_.status_code());
ErrorInfo error_info;
if (pp_error != PP_OK || info.desc == NACL_NO_FILE_DESC) {
if (pp_error == PP_ERROR_ABORTED) {
ReportLoadAbort();
} else if (pp_error == PP_ERROR_NOACCESS) {
error_info.SetReport(ERROR_NEXE_NOACCESS_URL,
"access to nexe url was denied.");
ReportLoadError(error_info);
} else {
error_info.SetReport(ERROR_NEXE_LOAD_URL, "could not load nexe url.");
ReportLoadError(error_info);
}
return;
}
int32_t file_desc_ok_to_close = DUP(info.desc);
if (file_desc_ok_to_close == NACL_NO_FILE_DESC) {
error_info.SetReport(ERROR_NEXE_FH_DUP,
"could not duplicate loaded file handle.");
ReportLoadError(error_info);
return;
}
struct stat stat_buf;
if (0 != fstat(file_desc_ok_to_close, &stat_buf)) {
CLOSE(file_desc_ok_to_close);
error_info.SetReport(ERROR_NEXE_STAT, "could not stat nexe file.");
ReportLoadError(error_info);
return;
}
size_t nexe_bytes_read = static_cast<size_t>(stat_buf.st_size);
nexe_size_ = nexe_bytes_read;
HistogramSizeKB("NaCl.Perf.Size.Nexe",
static_cast<int32_t>(nexe_size_ / 1024));
HistogramStartupTimeMedium(
"NaCl.Perf.StartupTime.NexeDownload",
static_cast<float>(nexe_downloader_.TimeSinceOpenMilliseconds()));
// Inform JavaScript that we successfully downloaded the nacl module.
EnqueueProgressEvent(kProgressEventProgress,
nexe_downloader_.url_to_open(),
LENGTH_IS_COMPUTABLE,
nexe_bytes_read,
nexe_bytes_read);
load_start_ = NaClGetTimeOfDayMicroseconds();
nacl::scoped_ptr<nacl::DescWrapper>
wrapper(wrapper_factory()->MakeFileDesc(file_desc_ok_to_close, O_RDONLY));
NaClLog(4, "NexeFileDidOpen: invoking LoadNaClModule\n");
bool was_successful = LoadNaClModule(
wrapper.get(), &error_info,
true, /* enable_dyncode_syscalls */
true, /* enable_exception_handling */
callback_factory_.NewCallback(&Plugin::NexeFileDidOpenContinuation),
callback_factory_.NewCallback(&Plugin::NexeDidCrash));
if (!was_successful) {
ReportLoadError(error_info);
}
}
void Plugin::NexeFileDidOpenContinuation(int32_t pp_error) {
ErrorInfo error_info;
bool was_successful;
UNREFERENCED_PARAMETER(pp_error);
NaClLog(4, "Entered NexeFileDidOpenContinuation\n");
NaClLog(4, "NexeFileDidOpenContinuation: invoking"
" LoadNaClModuleContinuationIntern\n");
was_successful = LoadNaClModuleContinuationIntern(&error_info);
if (was_successful) {
NaClLog(4, "NexeFileDidOpenContinuation: success;"
" setting histograms\n");
ready_time_ = NaClGetTimeOfDayMicroseconds();
HistogramStartupTimeSmall(
"NaCl.Perf.StartupTime.LoadModule",
static_cast<float>(ready_time_ - load_start_) / NACL_MICROS_PER_MILLI);
HistogramStartupTimeMedium(
"NaCl.Perf.StartupTime.Total",
static_cast<float>(ready_time_ - init_time_) / NACL_MICROS_PER_MILLI);
ReportLoadSuccess(LENGTH_IS_COMPUTABLE, nexe_size_, nexe_size_);
} else {
NaClLog(4, "NexeFileDidOpenContinuation: failed.");
ReportLoadError(error_info);
}
NaClLog(4, "Leaving NexeFileDidOpenContinuation\n");
}
static void LogLineToConsole(Plugin* plugin, const nacl::string& one_line) {
PLUGIN_PRINTF(("LogLineToConsole: %s\n",
one_line.c_str()));
plugin->AddToConsole(one_line);
}
void Plugin::CopyCrashLogToJsConsole() {
nacl::string fatal_msg(main_service_runtime()->GetCrashLogOutput());
size_t ix_start = 0;
size_t ix_end;
PLUGIN_PRINTF(("Plugin::CopyCrashLogToJsConsole: got %" NACL_PRIuS " bytes\n",
fatal_msg.size()));
while (nacl::string::npos != (ix_end = fatal_msg.find('\n', ix_start))) {
LogLineToConsole(this, fatal_msg.substr(ix_start, ix_end - ix_start));
ix_start = ix_end + 1;
}
if (ix_start != fatal_msg.size()) {
LogLineToConsole(this, fatal_msg.substr(ix_start));
}
}
void Plugin::NexeDidCrash(int32_t pp_error) {
PLUGIN_PRINTF(("Plugin::NexeDidCrash (pp_error=%" NACL_PRId32 ")\n",
pp_error));
if (pp_error != PP_OK) {
PLUGIN_PRINTF(("Plugin::NexeDidCrash: CallOnMainThread callback with"
" non-PP_OK arg -- SHOULD NOT HAPPEN\n"));
}
PLUGIN_PRINTF(("Plugin::NexeDidCrash: crash event!\n"));
int exit_status = main_subprocess_.service_runtime()->exit_status();
if (-1 != exit_status) {
// The NaCl module voluntarily exited. However, this is still a
// crash from the point of view of Pepper, since PPAPI plugins are
// event handlers and should never exit.
PLUGIN_PRINTF((("Plugin::NexeDidCrash: nexe exited with status %d"
" so this is a \"controlled crash\".\n"),
exit_status));
}
// If the crash occurs during load, we just want to report an error
// that fits into our load progress event grammar. If the crash
// occurs after loaded/loadend, then we use ReportDeadNexe to send a
// "crash" event.
if (nexe_error_reported()) {
PLUGIN_PRINTF(("Plugin::NexeDidCrash: error already reported;"
" suppressing\n"));
} else {
if (nacl_ready_state() == DONE) {
ReportDeadNexe();
} else {
ErrorInfo error_info;
// The error is not quite right. In particular, the crash
// reported by this path could be due to NaCl application
// crashes that occur after the PPAPI proxy has started.
error_info.SetReport(ERROR_START_PROXY_CRASH,
"Nexe crashed during startup");
ReportLoadError(error_info);
}
}
// In all cases, try to grab the crash log. The first error
// reported may have come from the start_module RPC reply indicating
// a validation error or something similar, which wouldn't grab the
// crash log. In the event that this is called twice, the second
// invocation will just be a no-op, since all the crash log will
// have been received and we'll just get an EOF indication.
CopyCrashLogToJsConsole();
// Remember the nexe crash time, which helps determine the need to throttle.
ModulePpapi* module_ppapi = static_cast<ModulePpapi*>(pp::Module::Get());
module_ppapi->RegisterPluginCrash();
}
void Plugin::BitcodeDidTranslate(int32_t pp_error) {
PLUGIN_PRINTF(("Plugin::BitcodeDidTranslate (pp_error=%" NACL_PRId32 ")\n",
pp_error));
if (pp_error != PP_OK) {
// Error should have been reported by pnacl. Just return.
PLUGIN_PRINTF(("Plugin::BitcodeDidTranslate error in Pnacl\n"));
return;
}
// Inform JavaScript that we successfully translated the bitcode to a nexe.
nacl::scoped_ptr<nacl::DescWrapper>
wrapper(pnacl_coordinator_.get()->ReleaseTranslatedFD());
ErrorInfo error_info;
bool was_successful = LoadNaClModule(
wrapper.get(), &error_info,
false, /* enable_dyncode_syscalls */
false, /* enable_exception_handling */
callback_factory_.NewCallback(&Plugin::BitcodeDidTranslateContinuation),
callback_factory_.NewCallback(&Plugin::NexeDidCrash));
if (!was_successful) {
ReportLoadError(error_info);
}
}
void Plugin::BitcodeDidTranslateContinuation(int32_t pp_error) {
ErrorInfo error_info;
bool was_successful = LoadNaClModuleContinuationIntern(&error_info);
NaClLog(4, "Entered BitcodeDidTranslateContinuation\n");
UNREFERENCED_PARAMETER(pp_error);
if (was_successful) {
int64_t loaded;
int64_t total;
pnacl_coordinator_->GetCurrentProgress(&loaded, &total);
ReportLoadSuccess(LENGTH_IS_COMPUTABLE, loaded, total);
} else {
ReportLoadError(error_info);
}
}
void Plugin::ReportDeadNexe() {
PLUGIN_PRINTF(("Plugin::ReportDeadNexe\n"));
if (nacl_ready_state() == DONE && !nexe_error_reported()) { // After loadEnd.
int64_t crash_time = NaClGetTimeOfDayMicroseconds();
// Crashes will be more likely near startup, so use a medium histogram
// instead of a large one.
HistogramTimeMedium(
"NaCl.ModuleUptime.Crash",
(crash_time - ready_time_) / NACL_MICROS_PER_MILLI);
nacl::string message = nacl::string("NaCl module crashed");
set_last_error_string(message);
AddToConsole(message);
EnqueueProgressEvent(kProgressEventCrash);
set_nexe_error_reported(true);
}
// else ReportLoadError() and ReportAbortError() will be used by loading code
// to provide error handling.
//
// NOTE: not all crashes during load will make it here.
// Those in BrowserPpp::InitializeModule and creation of PPP interfaces
// will just get reported back as PP_ERROR_FAILED.
}
void Plugin::NaClManifestBufferReady(int32_t pp_error) {
PLUGIN_PRINTF(("Plugin::NaClManifestBufferReady (pp_error=%"
NACL_PRId32 ")\n", pp_error));
ErrorInfo error_info;
set_manifest_url(nexe_downloader_.url());
if (pp_error != PP_OK) {
if (pp_error == PP_ERROR_ABORTED) {
ReportLoadAbort();
} else {
error_info.SetReport(ERROR_MANIFEST_LOAD_URL,
"could not load manifest url.");
ReportLoadError(error_info);
}
return;
}
const std::deque<char>& buffer = nexe_downloader_.buffer();
size_t buffer_size = buffer.size();
if (buffer_size > kNaClManifestMaxFileBytes) {
error_info.SetReport(ERROR_MANIFEST_TOO_LARGE,
"manifest file too large.");
ReportLoadError(error_info);
return;
}
nacl::scoped_array<char> json_buffer(new char[buffer_size + 1]);
if (json_buffer == NULL) {
error_info.SetReport(ERROR_MANIFEST_MEMORY_ALLOC,
"could not allocate manifest memory.");
ReportLoadError(error_info);
return;
}
std::copy(buffer.begin(), buffer.begin() + buffer_size, &json_buffer[0]);
json_buffer[buffer_size] = '\0';
ProcessNaClManifest(json_buffer.get());
}
void Plugin::NaClManifestFileDidOpen(int32_t pp_error) {
PLUGIN_PRINTF(("Plugin::NaClManifestFileDidOpen (pp_error=%"
NACL_PRId32 ")\n", pp_error));
HistogramTimeSmall("NaCl.Perf.StartupTime.ManifestDownload",
nexe_downloader_.TimeSinceOpenMilliseconds());
HistogramHTTPStatusCode(
is_installed_ ?
"NaCl.HttpStatusCodeClass.Manifest.InstalledApp" :
"NaCl.HttpStatusCodeClass.Manifest.NotInstalledApp",
nexe_downloader_.status_code());
ErrorInfo error_info;
// The manifest file was successfully opened. Set the src property on the
// plugin now, so that the full url is available to error handlers.
set_manifest_url(nexe_downloader_.url());
struct NaClFileInfo info = nexe_downloader_.GetFileInfo();
PLUGIN_PRINTF(("Plugin::NaClManifestFileDidOpen (file_desc=%"
NACL_PRId32 ")\n", info.desc));
if (pp_error != PP_OK || info.desc == NACL_NO_FILE_DESC) {
if (pp_error == PP_ERROR_ABORTED) {
ReportLoadAbort();
} else if (pp_error == PP_ERROR_NOACCESS) {
error_info.SetReport(ERROR_MANIFEST_NOACCESS_URL,
"access to manifest url was denied.");
ReportLoadError(error_info);
} else {
error_info.SetReport(ERROR_MANIFEST_LOAD_URL,
"could not load manifest url.");
ReportLoadError(error_info);
}
return;
}
// SlurpFile closes the file descriptor after reading (or on error).
// Duplicate our file descriptor since it will be handled by the browser.
int dup_file_desc = DUP(info.desc);
nacl::string json_buffer;
file_utils::StatusCode status = file_utils::SlurpFile(
dup_file_desc, json_buffer, kNaClManifestMaxFileBytes);
if (status != file_utils::PLUGIN_FILE_SUCCESS) {
switch (status) {
case file_utils::PLUGIN_FILE_SUCCESS:
CHECK(0);
break;
case file_utils::PLUGIN_FILE_ERROR_MEM_ALLOC:
error_info.SetReport(ERROR_MANIFEST_MEMORY_ALLOC,
"could not allocate manifest memory.");
break;
case file_utils::PLUGIN_FILE_ERROR_OPEN:
error_info.SetReport(ERROR_MANIFEST_OPEN,
"could not open manifest file.");
break;
case file_utils::PLUGIN_FILE_ERROR_FILE_TOO_LARGE:
error_info.SetReport(ERROR_MANIFEST_TOO_LARGE,
"manifest file too large.");
break;
case file_utils::PLUGIN_FILE_ERROR_STAT:
error_info.SetReport(ERROR_MANIFEST_STAT,
"could not stat manifest file.");
break;
case file_utils::PLUGIN_FILE_ERROR_READ:
error_info.SetReport(ERROR_MANIFEST_READ,
"could not read manifest file.");
break;
}
ReportLoadError(error_info);
return;
}
ProcessNaClManifest(json_buffer);
}
void Plugin::ProcessNaClManifest(const nacl::string& manifest_json) {
HistogramSizeKB("NaCl.Perf.Size.Manifest",
static_cast<int32_t>(manifest_json.length() / 1024));
nacl::string program_url;
PnaclOptions pnacl_options;
ErrorInfo error_info;
if (!SetManifestObject(manifest_json, &error_info)) {
ReportLoadError(error_info);
return;
}
if (manifest_->GetProgramURL(&program_url, &pnacl_options, &error_info)) {
is_installed_ = GetUrlScheme(program_url) == SCHEME_CHROME_EXTENSION;
set_nacl_ready_state(LOADING);
// Inform JavaScript that we found a nexe URL to load.
EnqueueProgressEvent(kProgressEventProgress);
if (pnacl_options.translate()) {
if (this->nacl_interface()->IsPnaclEnabled()) {
// Check whether PNaCl has been crashing "frequently". If so, report
// a load error.
ModulePpapi* module_ppapi =
static_cast<ModulePpapi*>(pp::Module::Get());
if (module_ppapi->IsPluginUnstable()) {
error_info.SetReport(ERROR_PNACL_CRASH_THROTTLED,
"PNaCl has been temporarily disabled because too"
" many crashes have been observed.");
} else {
pp::CompletionCallback translate_callback =
callback_factory_.NewCallback(&Plugin::BitcodeDidTranslate);
// Will always call the callback on success or failure.
pnacl_coordinator_.reset(
PnaclCoordinator::BitcodeToNative(this,
program_url,
pnacl_options,
translate_callback));
return;
}
} else {
error_info.SetReport(ERROR_PNACL_NOT_ENABLED,
"PNaCl has been disabled (e.g., by setting "
"the --disable-pnacl flag).");
}
} else {
// Try the fast path first. This will only block if the file is installed.
if (OpenURLFast(program_url, &nexe_downloader_)) {
NexeFileDidOpen(PP_OK);
} else {
pp::CompletionCallback open_callback =
callback_factory_.NewCallback(&Plugin::NexeFileDidOpen);
// Will always call the callback on success or failure.
CHECK(
nexe_downloader_.Open(program_url,
DOWNLOAD_TO_FILE,
open_callback,
true,
&UpdateDownloadProgress));
}
return;
}
}
// Failed to select the program and/or the translator.
ReportLoadError(error_info);
}
void Plugin::RequestNaClManifest(const nacl::string& url) {
PLUGIN_PRINTF(("Plugin::RequestNaClManifest (url='%s')\n", url.c_str()));
PLUGIN_PRINTF(("Plugin::RequestNaClManifest (plugin base url='%s')\n",
plugin_base_url().c_str()));
// The full URL of the manifest file is relative to the base url.
CHECK(url_util_ != NULL);
pp::Var nmf_resolved_url =
url_util_->ResolveRelativeToURL(plugin_base_url(), pp::Var(url));
if (!nmf_resolved_url.is_string()) {
ErrorInfo error_info;
error_info.SetReport(
ERROR_MANIFEST_RESOLVE_URL,
nacl::string("could not resolve URL \"") + url.c_str() +
"\" relative to \"" + plugin_base_url().c_str() + "\".");
ReportLoadError(error_info);
return;
}
PLUGIN_PRINTF(("Plugin::RequestNaClManifest (resolved url='%s')\n",
nmf_resolved_url.AsString().c_str()));
is_installed_ = GetUrlScheme(nmf_resolved_url.AsString()) ==
SCHEME_CHROME_EXTENSION;
set_manifest_base_url(nmf_resolved_url.AsString());
set_manifest_url(url);
// Inform JavaScript that a load is starting.
set_nacl_ready_state(OPENED);
EnqueueProgressEvent(kProgressEventLoadStart);
bool is_data_uri = GetUrlScheme(nmf_resolved_url.AsString()) == SCHEME_DATA;
HistogramEnumerateManifestIsDataURI(static_cast<int>(is_data_uri));
if (is_data_uri) {
pp::CompletionCallback open_callback =
callback_factory_.NewCallback(&Plugin::NaClManifestBufferReady);
// Will always call the callback on success or failure.
CHECK(nexe_downloader_.Open(nmf_resolved_url.AsString(),
DOWNLOAD_TO_BUFFER,
open_callback,
false,
NULL));
} else {
pp::CompletionCallback open_callback =
callback_factory_.NewCallback(&Plugin::NaClManifestFileDidOpen);
// Will always call the callback on success or failure.
CHECK(nexe_downloader_.Open(nmf_resolved_url.AsString(),
DOWNLOAD_TO_FILE,
open_callback,
false,
NULL));
}
}
bool Plugin::SetManifestObject(const nacl::string& manifest_json,
ErrorInfo* error_info) {
PLUGIN_PRINTF(("Plugin::SetManifestObject(): manifest_json='%s'.\n",
manifest_json.c_str()));
if (error_info == NULL)
return false;
// Determine whether lookups should use portable (i.e., pnacl versions)
// rather than platform-specific files.
bool is_pnacl = (mime_type() == kPnaclMIMEType);
nacl::scoped_ptr<JsonManifest> json_manifest(
new JsonManifest(url_util_,
manifest_base_url(),
(is_pnacl ? kPortableISA : GetSandboxISA())));
if (!json_manifest->Init(manifest_json, error_info)) {
return false;
}
manifest_.reset(json_manifest.release());
return true;
}
void Plugin::UrlDidOpenForStreamAsFile(int32_t pp_error,
FileDownloader*& url_downloader,
PP_CompletionCallback callback) {
PLUGIN_PRINTF(("Plugin::UrlDidOpen (pp_error=%" NACL_PRId32
", url_downloader=%p)\n", pp_error,
static_cast<void*>(url_downloader)));
url_downloaders_.erase(url_downloader);
nacl::scoped_ptr<FileDownloader> scoped_url_downloader(url_downloader);
struct NaClFileInfo info = scoped_url_downloader->GetFileInfo();
if (pp_error != PP_OK) {
PP_RunCompletionCallback(&callback, pp_error);
} else if (info.desc > NACL_NO_FILE_DESC) {
url_file_info_map_[url_downloader->url_to_open()] = info;
PP_RunCompletionCallback(&callback, PP_OK);
} else {
PP_RunCompletionCallback(&callback, PP_ERROR_FAILED);
}
}
struct NaClFileInfo Plugin::GetFileInfo(const nacl::string& url) {
struct NaClFileInfo info;
memset(&info, 0, sizeof(info));
std::map<nacl::string, struct NaClFileInfo>::iterator it =
url_file_info_map_.find(url);
if (it != url_file_info_map_.end()) {
info = it->second;
info.desc = DUP(info.desc);
} else {
info.desc = -1;
}
return info;
}
bool Plugin::StreamAsFile(const nacl::string& url,
PP_CompletionCallback callback) {
PLUGIN_PRINTF(("Plugin::StreamAsFile (url='%s')\n", url.c_str()));
FileDownloader* downloader = new FileDownloader();
downloader->Initialize(this);
url_downloaders_.insert(downloader);
// Untrusted loads are always relative to the page's origin.
CHECK(url_util_ != NULL);
pp::Var resolved_url =
url_util_->ResolveRelativeToURL(pp::Var(plugin_base_url()), url);
if (!resolved_url.is_string()) {
PLUGIN_PRINTF(("Plugin::StreamAsFile: "
"could not resolve url \"%s\" relative to plugin \"%s\".",
url.c_str(),
plugin_base_url().c_str()));
return false;
}
// Try the fast path first. This will only block if the file is installed.
if (OpenURLFast(url, downloader)) {
UrlDidOpenForStreamAsFile(PP_OK, downloader, callback);
return true;
}
pp::CompletionCallback open_callback = callback_factory_.NewCallback(
&Plugin::UrlDidOpenForStreamAsFile, downloader, callback);
// If true, will always call the callback on success or failure.
return downloader->Open(url,
DOWNLOAD_TO_FILE,
open_callback,
true,
&UpdateDownloadProgress);
}
void Plugin::ReportLoadSuccess(LengthComputable length_computable,
uint64_t loaded_bytes,
uint64_t total_bytes) {
// Set the readyState attribute to indicate loaded.
set_nacl_ready_state(DONE);
// Inform JavaScript that loading was successful and is complete.
const nacl::string& url = nexe_downloader_.url_to_open();
EnqueueProgressEvent(
kProgressEventLoad, url, length_computable, loaded_bytes, total_bytes);
EnqueueProgressEvent(
kProgressEventLoadEnd, url, length_computable, loaded_bytes, total_bytes);
// UMA
HistogramEnumerateLoadStatus(ERROR_LOAD_SUCCESS, is_installed_);
}
// TODO(ncbray): report UMA stats
void Plugin::ReportLoadError(const ErrorInfo& error_info) {
PLUGIN_PRINTF(("Plugin::ReportLoadError (error='%s')\n",
error_info.message().c_str()));
// For errors the user (and not just the developer) should know about,
// report them to the renderer so the browser can display a message.
if (error_info.error_code() == ERROR_MANIFEST_PROGRAM_MISSING_ARCH) {
// A special case: the manifest may otherwise be valid but is missing
// a program/file compatible with the user's sandbox.
nacl_interface()->ReportNaClError(pp_instance(),
PP_NACL_MANIFEST_MISSING_ARCH);
}
// Set the readyState attribute to indicate we need to start over.
set_nacl_ready_state(DONE);
set_nexe_error_reported(true);
// Report an error in lastError and on the JavaScript console.
nacl::string message = nacl::string("NaCl module load failed: ") +
error_info.message();
set_last_error_string(message);
AddToConsole(nacl::string("NaCl module load failed: ") +
error_info.console_message());
// Inform JavaScript that loading encountered an error and is complete.
EnqueueProgressEvent(kProgressEventError);
EnqueueProgressEvent(kProgressEventLoadEnd);
// UMA
HistogramEnumerateLoadStatus(error_info.error_code(), is_installed_);
}
void Plugin::ReportLoadAbort() {
PLUGIN_PRINTF(("Plugin::ReportLoadAbort\n"));
// Set the readyState attribute to indicate we need to start over.
set_nacl_ready_state(DONE);
set_nexe_error_reported(true);
// Report an error in lastError and on the JavaScript console.
nacl::string error_string("NaCl module load failed: user aborted");
set_last_error_string(error_string);
AddToConsole(error_string);
// Inform JavaScript that loading was aborted and is complete.
EnqueueProgressEvent(kProgressEventAbort);
EnqueueProgressEvent(kProgressEventLoadEnd);
// UMA
HistogramEnumerateLoadStatus(ERROR_LOAD_ABORTED, is_installed_);
}
void Plugin::UpdateDownloadProgress(
PP_Instance pp_instance,
PP_Resource pp_resource,
int64_t /*bytes_sent*/,
int64_t /*total_bytes_to_be_sent*/,
int64_t bytes_received,
int64_t total_bytes_to_be_received) {
Instance* instance = pp::Module::Get()->InstanceForPPInstance(pp_instance);
if (instance != NULL) {
Plugin* plugin = static_cast<Plugin*>(instance);
// Rate limit progress events to a maximum of 100 per second.
int64_t time = NaClGetTimeOfDayMicroseconds();
int64_t elapsed = time - plugin->time_of_last_progress_event_;
const int64_t kTenMilliseconds = 10000;
if (elapsed > kTenMilliseconds) {
plugin->time_of_last_progress_event_ = time;
// Find the URL loader that sent this notification.
const FileDownloader* file_downloader =
plugin->FindFileDownloader(pp_resource);
// If not a streamed file, it must be the .nexe loader.
if (file_downloader == NULL)
file_downloader = &plugin->nexe_downloader_;
nacl::string url = file_downloader->url_to_open();
LengthComputable length_computable = (total_bytes_to_be_received >= 0) ?
LENGTH_IS_COMPUTABLE : LENGTH_IS_NOT_COMPUTABLE;
plugin->EnqueueProgressEvent(kProgressEventProgress,
url,
length_computable,
bytes_received,
total_bytes_to_be_received);
}
}
}
const FileDownloader* Plugin::FindFileDownloader(
PP_Resource url_loader) const {
const FileDownloader* file_downloader = NULL;
if (url_loader == nexe_downloader_.url_loader()) {
file_downloader = &nexe_downloader_;
} else {
std::set<FileDownloader*>::const_iterator it = url_downloaders_.begin();
while (it != url_downloaders_.end()) {
if (url_loader == (*it)->url_loader()) {
file_downloader = (*it);
break;
}
++it;
}
}
return file_downloader;
}
void Plugin::EnqueueProgressEvent(const char* event_type) {
EnqueueProgressEvent(event_type,
NACL_NO_URL,
Plugin::LENGTH_IS_NOT_COMPUTABLE,
Plugin::kUnknownBytes,
Plugin::kUnknownBytes);
}
void Plugin::EnqueueProgressEvent(const char* event_type,
const nacl::string& url,
LengthComputable length_computable,
uint64_t loaded_bytes,
uint64_t total_bytes) {
PLUGIN_PRINTF(("Plugin::EnqueueProgressEvent ("
"event_type='%s', url='%s', length_computable=%d, "
"loaded=%" NACL_PRIu64 ", total=%" NACL_PRIu64 ")\n",
event_type,
url.c_str(),
static_cast<int>(length_computable),
loaded_bytes,
total_bytes));
progress_events_.push(new ProgressEvent(event_type,
url,
length_computable,
loaded_bytes,
total_bytes));
// Note that using callback_factory_ in this way is not thread safe.
// If/when EnqueueProgressEvent is callable from another thread, this
// will need to change.
pp::CompletionCallback callback =
callback_factory_.NewCallback(&Plugin::DispatchProgressEvent);
pp::Core* core = pp::Module::Get()->core();
core->CallOnMainThread(0, callback, 0);
}
void Plugin::ReportSelLdrLoadStatus(int status) {
HistogramEnumerateSelLdrLoadStatus(static_cast<NaClErrorCode>(status),
is_installed_);
}
void Plugin::DispatchProgressEvent(int32_t result) {
PLUGIN_PRINTF(("Plugin::DispatchProgressEvent (result=%"
NACL_PRId32 ")\n", result));
if (result < 0) {
return;
}
if (progress_events_.empty()) {
PLUGIN_PRINTF(("Plugin::DispatchProgressEvent: no pending events\n"));
return;
}
nacl::scoped_ptr<ProgressEvent> event(progress_events_.front());
progress_events_.pop();
PLUGIN_PRINTF(("Plugin::DispatchProgressEvent ("
"event_type='%s', url='%s', length_computable=%d, "
"loaded=%" NACL_PRIu64 ", total=%" NACL_PRIu64 ")\n",
event->event_type(),
event->url(),
static_cast<int>(event->length_computable()),
event->loaded_bytes(),
event->total_bytes()));
static const char* kEventClosureJS =
"(function(target, type, url,"
" lengthComputable, loadedBytes, totalBytes) {"
" var progress_event = new ProgressEvent(type, {"
" bubbles: false,"
" cancelable: true,"
" lengthComputable: lengthComputable,"
" loaded: loadedBytes,"
" total: totalBytes"
" });"
" progress_event.url = url;"
" target.dispatchEvent(progress_event);"
"})";
// Create a function object by evaluating the JavaScript text.
// TODO(sehr, polina): We should probably cache the created function object to
// avoid JavaScript reparsing.
pp::VarPrivate exception;
pp::VarPrivate function_object = ExecuteScript(kEventClosureJS, &exception);
if (!exception.is_undefined() || !function_object.is_object()) {
PLUGIN_PRINTF(("Plugin::DispatchProgressEvent:"
" Function object creation failed.\n"));
return;
}
// Get the target of the event to be dispatched.
pp::Var owner_element_object = GetOwnerElementObject();
if (!owner_element_object.is_object()) {
PLUGIN_PRINTF(("Plugin::DispatchProgressEvent:"
" Couldn't get owner element object.\n"));
NACL_NOTREACHED();
return;
}
pp::Var argv[6];
static const uint32_t argc = NACL_ARRAY_SIZE(argv);
argv[0] = owner_element_object;
argv[1] = pp::Var(event->event_type());
argv[2] = pp::Var(event->url());
argv[3] = pp::Var(event->length_computable() == LENGTH_IS_COMPUTABLE);
argv[4] = pp::Var(static_cast<double>(event->loaded_bytes()));
argv[5] = pp::Var(static_cast<double>(event->total_bytes()));
// Dispatch the event.
const pp::Var default_method;
function_object.Call(default_method, argc, argv, &exception);
if (!exception.is_undefined()) {
PLUGIN_PRINTF(("Plugin::DispatchProgressEvent:"
" event dispatch failed.\n"));
}
}
bool Plugin::OpenURLFast(const nacl::string& url,
FileDownloader* downloader) {
// Fast path only works for installed file URLs.
if (GetUrlScheme(url) != SCHEME_CHROME_EXTENSION)
return false;
// IMPORTANT: Make sure the document can request the given URL. If we don't
// check, a malicious app could probe the extension system. This enforces a
// same-origin policy which prevents the app from requesting resources from
// another app.
if (!DocumentCanRequest(url))
return false;
uint64_t file_token_lo = 0;
uint64_t file_token_hi = 0;
PP_FileHandle file_handle =
nacl_interface()->OpenNaClExecutable(pp_instance(),
url.c_str(),
&file_token_lo, &file_token_hi);
// We shouldn't hit this if the file URL is in an installed app.
if (file_handle == PP_kInvalidFileHandle)
return false;
// FileDownloader takes ownership of the file handle.
downloader->OpenFast(url, file_handle, file_token_lo, file_token_hi);
return true;
}
UrlSchemeType Plugin::GetUrlScheme(const std::string& url) {
CHECK(url_util_ != NULL);
PP_URLComponents_Dev comps;
pp::Var canonicalized =
url_util_->Canonicalize(pp::Var(url), &comps);
if (canonicalized.is_null() ||
(comps.scheme.begin == 0 && comps.scheme.len == -1)) {
// |url| was an invalid URL or has no scheme.
return SCHEME_OTHER;
}
CHECK(comps.scheme.begin <
static_cast<int>(canonicalized.AsString().size()));
CHECK(comps.scheme.begin + comps.scheme.len <
static_cast<int>(canonicalized.AsString().size()));
std::string scheme = canonicalized.AsString().substr(comps.scheme.begin,
comps.scheme.len);
if (scheme == kChromeExtensionUriScheme)
return SCHEME_CHROME_EXTENSION;
if (scheme == kDataUriScheme)
return SCHEME_DATA;
return SCHEME_OTHER;
}
bool Plugin::DocumentCanRequest(const std::string& url) {
CHECK(url_util_ != NULL);
return url_util_->DocumentCanRequest(this, pp::Var(url));
}
void Plugin::AddToConsole(const nacl::string& text) {
pp::Module* module = pp::Module::Get();
const PPB_Var* var_interface =
static_cast<const PPB_Var*>(
module->GetBrowserInterface(PPB_VAR_INTERFACE));
nacl::string prefix_string("NativeClient");
PP_Var prefix =
var_interface->VarFromUtf8(prefix_string.c_str(),
static_cast<uint32_t>(prefix_string.size()));
PP_Var str = var_interface->VarFromUtf8(text.c_str(),
static_cast<uint32_t>(text.size()));
const PPB_Console* console_interface =
static_cast<const PPB_Console*>(
module->GetBrowserInterface(PPB_CONSOLE_INTERFACE));
console_interface->LogWithSource(pp_instance(), PP_LOGLEVEL_LOG, prefix, str);
var_interface->Release(prefix);
var_interface->Release(str);
}
} // namespace plugin