1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/plugins/ipc/PluginProcessChild.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,156 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: sw=4 ts=4 et :
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "mozilla/ipc/IOThreadChild.h"
1.11 +#include "mozilla/plugins/PluginProcessChild.h"
1.12 +
1.13 +#include "prlink.h"
1.14 +
1.15 +#include "base/command_line.h"
1.16 +#include "base/string_util.h"
1.17 +#include "chrome/common/chrome_switches.h"
1.18 +
1.19 +#if defined(XP_MACOSX)
1.20 +#include "nsCocoaFeatures.h"
1.21 +// An undocumented CoreGraphics framework method, present in the same form
1.22 +// since at least OS X 10.5.
1.23 +extern "C" CGError CGSSetDebugOptions(int options);
1.24 +#endif
1.25 +
1.26 +#ifdef XP_WIN
1.27 +#include <objbase.h>
1.28 +bool ShouldProtectPluginCurrentDirectory(char16ptr_t pluginFilePath);
1.29 +#endif
1.30 +
1.31 +using mozilla::ipc::IOThreadChild;
1.32 +
1.33 +#ifdef OS_WIN
1.34 +#include "nsSetDllDirectory.h"
1.35 +#include <algorithm>
1.36 +
1.37 +namespace {
1.38 +
1.39 +std::size_t caseInsensitiveFind(std::string aHaystack, std::string aNeedle) {
1.40 + std::transform(aHaystack.begin(), aHaystack.end(), aHaystack.begin(), ::tolower);
1.41 + std::transform(aNeedle.begin(), aNeedle.end(), aNeedle.begin(), ::tolower);
1.42 + return aHaystack.find(aNeedle);
1.43 +}
1.44 +
1.45 +}
1.46 +#endif
1.47 +
1.48 +namespace mozilla {
1.49 +namespace plugins {
1.50 +
1.51 +
1.52 +bool
1.53 +PluginProcessChild::Init()
1.54 +{
1.55 +#if defined(XP_MACOSX)
1.56 + // Remove the trigger for "dyld interposing" that we added in
1.57 + // GeckoChildProcessHost::PerformAsyncLaunchInternal(), in the host
1.58 + // process just before we were launched. Dyld interposing will still
1.59 + // happen in our process (the plugin child process). But we don't want
1.60 + // it to happen in any processes that the plugin might launch from our
1.61 + // process.
1.62 + nsCString interpose(PR_GetEnv("DYLD_INSERT_LIBRARIES"));
1.63 + if (!interpose.IsEmpty()) {
1.64 + // If we added the path to libplugin_child_interpose.dylib to an
1.65 + // existing DYLD_INSERT_LIBRARIES, we appended it to the end, after a
1.66 + // ":" path seperator.
1.67 + int32_t lastSeparatorPos = interpose.RFind(":");
1.68 + int32_t lastTriggerPos = interpose.RFind("libplugin_child_interpose.dylib");
1.69 + bool needsReset = false;
1.70 + if (lastTriggerPos != -1) {
1.71 + if (lastSeparatorPos == -1) {
1.72 + interpose.Truncate();
1.73 + needsReset = true;
1.74 + } else if (lastTriggerPos > lastSeparatorPos) {
1.75 + interpose.SetLength(lastSeparatorPos);
1.76 + needsReset = true;
1.77 + }
1.78 + }
1.79 + if (needsReset) {
1.80 + nsCString setInterpose("DYLD_INSERT_LIBRARIES=");
1.81 + if (!interpose.IsEmpty()) {
1.82 + setInterpose.Append(interpose);
1.83 + }
1.84 + // Values passed to PR_SetEnv() must be seperately allocated.
1.85 + char* setInterposePtr = strdup(setInterpose.get());
1.86 + PR_SetEnv(setInterposePtr);
1.87 + }
1.88 + }
1.89 +#endif
1.90 +
1.91 +#ifdef XP_WIN
1.92 + // Drag-and-drop needs OleInitialize to be called, and Silverlight depends
1.93 + // on the host calling CoInitialize (which is called by OleInitialize).
1.94 + ::OleInitialize(nullptr);
1.95 +#endif
1.96 +
1.97 + // Certain plugins, such as flash, steal the unhandled exception filter
1.98 + // thus we never get crash reports when they fault. This call fixes it.
1.99 + message_loop()->set_exception_restoration(true);
1.100 +
1.101 + std::string pluginFilename;
1.102 +
1.103 +#if defined(OS_POSIX)
1.104 + // NB: need to be very careful in ensuring that the first arg
1.105 + // (after the binary name) here is indeed the plugin module path.
1.106 + // Keep in sync with dom/plugins/PluginModuleParent.
1.107 + std::vector<std::string> values = CommandLine::ForCurrentProcess()->argv();
1.108 + NS_ABORT_IF_FALSE(values.size() >= 2, "not enough args");
1.109 +
1.110 + pluginFilename = UnmungePluginDsoPath(values[1]);
1.111 +
1.112 +#elif defined(OS_WIN)
1.113 + std::vector<std::wstring> values =
1.114 + CommandLine::ForCurrentProcess()->GetLooseValues();
1.115 + NS_ABORT_IF_FALSE(values.size() >= 1, "not enough loose args");
1.116 +
1.117 + if (ShouldProtectPluginCurrentDirectory(values[0].c_str())) {
1.118 + SanitizeEnvironmentVariables();
1.119 + SetDllDirectory(L"");
1.120 + }
1.121 +
1.122 + pluginFilename = WideToUTF8(values[0]);
1.123 +#else
1.124 +# error Sorry
1.125 +#endif
1.126 +
1.127 + if (NS_FAILED(nsRegion::InitStatic())) {
1.128 + NS_ERROR("Could not initialize nsRegion");
1.129 + return false;
1.130 + }
1.131 +
1.132 + bool retval = mPlugin.Init(pluginFilename, ParentHandle(),
1.133 + IOThreadChild::message_loop(),
1.134 + IOThreadChild::channel());
1.135 +#if defined(XP_MACOSX)
1.136 + if (nsCocoaFeatures::OnYosemiteOrLater()) {
1.137 + // Explicitly turn off CGEvent logging. This works around bug 1092855.
1.138 + // If there are already CGEvents in the log, turning off logging also
1.139 + // causes those events to be written to disk. But at this point no
1.140 + // CGEvents have yet been processed. CGEvents are events (usually
1.141 + // input events) pulled from the WindowServer. An option of 0x80000008
1.142 + // turns on CGEvent logging.
1.143 + CGSSetDebugOptions(0x80000007);
1.144 + }
1.145 +#endif
1.146 + return retval;
1.147 +}
1.148 +
1.149 +void
1.150 +PluginProcessChild::CleanUp()
1.151 +{
1.152 +#ifdef XP_WIN
1.153 + ::OleUninitialize();
1.154 +#endif
1.155 + nsRegion::ShutdownStatic();
1.156 +}
1.157 +
1.158 +} // namespace plugins
1.159 +} // namespace mozilla
