mirror of
https://github.com/mozilla/gecko-dev.git
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242708cf72
--HG-- extra : rebase_source : 488e401ff87e31a2074c4108c4df0572d9536667
171 lines
5.5 KiB
C++
171 lines
5.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: sw=4 ts=4 et :
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ipc/IOThreadChild.h"
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#include "mozilla/plugins/PluginProcessChild.h"
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#include "prlink.h"
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#include "base/command_line.h"
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#include "base/string_util.h"
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#include "chrome/common/chrome_switches.h"
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#include "nsDebugImpl.h"
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#if defined(XP_MACOSX)
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#include "nsCocoaFeatures.h"
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// An undocumented CoreGraphics framework method, present in the same form
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// since at least OS X 10.5.
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extern "C" CGError CGSSetDebugOptions(int options);
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#endif
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#ifdef XP_WIN
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#include <objbase.h>
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bool ShouldProtectPluginCurrentDirectory(char16ptr_t pluginFilePath);
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#if defined(MOZ_SANDBOX)
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#define TARGET_SANDBOX_EXPORTS
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#include "mozilla/sandboxTarget.h"
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#endif
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#endif
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using mozilla::ipc::IOThreadChild;
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#ifdef OS_WIN
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#include "nsSetDllDirectory.h"
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#include <algorithm>
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namespace {
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std::size_t caseInsensitiveFind(std::string aHaystack, std::string aNeedle) {
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std::transform(aHaystack.begin(), aHaystack.end(), aHaystack.begin(), ::tolower);
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std::transform(aNeedle.begin(), aNeedle.end(), aNeedle.begin(), ::tolower);
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return aHaystack.find(aNeedle);
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}
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}
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#endif
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namespace mozilla {
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namespace plugins {
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bool
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PluginProcessChild::Init()
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{
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nsDebugImpl::SetMultiprocessMode("NPAPI");
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#if defined(XP_MACOSX)
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// Remove the trigger for "dyld interposing" that we added in
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// GeckoChildProcessHost::PerformAsyncLaunchInternal(), in the host
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// process just before we were launched. Dyld interposing will still
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// happen in our process (the plugin child process). But we don't want
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// it to happen in any processes that the plugin might launch from our
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// process.
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nsCString interpose(PR_GetEnv("DYLD_INSERT_LIBRARIES"));
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if (!interpose.IsEmpty()) {
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// If we added the path to libplugin_child_interpose.dylib to an
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// existing DYLD_INSERT_LIBRARIES, we appended it to the end, after a
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// ":" path seperator.
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int32_t lastSeparatorPos = interpose.RFind(":");
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int32_t lastTriggerPos = interpose.RFind("libplugin_child_interpose.dylib");
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bool needsReset = false;
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if (lastTriggerPos != -1) {
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if (lastSeparatorPos == -1) {
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interpose.Truncate();
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needsReset = true;
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} else if (lastTriggerPos > lastSeparatorPos) {
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interpose.SetLength(lastSeparatorPos);
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needsReset = true;
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}
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}
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if (needsReset) {
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nsCString setInterpose("DYLD_INSERT_LIBRARIES=");
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if (!interpose.IsEmpty()) {
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setInterpose.Append(interpose);
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}
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// Values passed to PR_SetEnv() must be seperately allocated.
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char* setInterposePtr = strdup(setInterpose.get());
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PR_SetEnv(setInterposePtr);
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}
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}
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#endif
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#ifdef XP_WIN
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// Drag-and-drop needs OleInitialize to be called, and Silverlight depends
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// on the host calling CoInitialize (which is called by OleInitialize).
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::OleInitialize(nullptr);
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#endif
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// Certain plugins, such as flash, steal the unhandled exception filter
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// thus we never get crash reports when they fault. This call fixes it.
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message_loop()->set_exception_restoration(true);
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std::string pluginFilename;
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#if defined(OS_POSIX)
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// NB: need to be very careful in ensuring that the first arg
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// (after the binary name) here is indeed the plugin module path.
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// Keep in sync with dom/plugins/PluginModuleParent.
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std::vector<std::string> values = CommandLine::ForCurrentProcess()->argv();
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MOZ_ASSERT(values.size() >= 2, "not enough args");
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pluginFilename = UnmungePluginDsoPath(values[1]);
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#elif defined(OS_WIN)
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std::vector<std::wstring> values =
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CommandLine::ForCurrentProcess()->GetLooseValues();
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MOZ_ASSERT(values.size() >= 1, "not enough loose args");
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if (ShouldProtectPluginCurrentDirectory(values[0].c_str())) {
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SanitizeEnvironmentVariables();
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SetDllDirectory(L"");
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}
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pluginFilename = WideToUTF8(values[0]);
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#if defined(MOZ_SANDBOX)
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// This is probably the earliest we would want to start the sandbox.
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// As we attempt to tighten the sandbox, we may need to consider moving this
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// to later in the plugin initialization.
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mozilla::SandboxTarget::Instance()->StartSandbox();
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#endif
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#else
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# error Sorry
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#endif
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if (NS_FAILED(nsRegion::InitStatic())) {
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NS_ERROR("Could not initialize nsRegion");
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return false;
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}
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bool retval = mPlugin.InitForChrome(pluginFilename, ParentHandle(),
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IOThreadChild::message_loop(),
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IOThreadChild::channel());
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#if defined(XP_MACOSX)
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if (nsCocoaFeatures::OnYosemiteOrLater()) {
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// Explicitly turn off CGEvent logging. This works around bug 1092855.
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// If there are already CGEvents in the log, turning off logging also
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// causes those events to be written to disk. But at this point no
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// CGEvents have yet been processed. CGEvents are events (usually
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// input events) pulled from the WindowServer. An option of 0x80000008
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// turns on CGEvent logging.
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CGSSetDebugOptions(0x80000007);
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}
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#endif
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return retval;
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}
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void
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PluginProcessChild::CleanUp()
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{
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#ifdef XP_WIN
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::OleUninitialize();
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#endif
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nsRegion::ShutdownStatic();
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}
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} // namespace plugins
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} // namespace mozilla
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