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