зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.9 KiB
Plaintext
115 строки
3.9 KiB
Plaintext
/* -*- Mode: C++; tab-width: 20; 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/. */
|
|
|
|
#include "nsSandboxViolationSink.h"
|
|
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include <asl.h>
|
|
#include <dispatch/dispatch.h>
|
|
#include <notify.h>
|
|
#include "nsCocoaDebugUtils.h"
|
|
#include "mozilla/Preferences.h"
|
|
|
|
int nsSandboxViolationSink::mNotifyToken = 0;
|
|
uint64_t nsSandboxViolationSink::mLastMsgReceived = 0;
|
|
|
|
void
|
|
nsSandboxViolationSink::Start()
|
|
{
|
|
if (mNotifyToken) {
|
|
return;
|
|
}
|
|
notify_register_dispatch(SANDBOX_VIOLATION_NOTIFICATION_NAME,
|
|
&mNotifyToken,
|
|
dispatch_queue_create(SANDBOX_VIOLATION_QUEUE_NAME,
|
|
DISPATCH_QUEUE_SERIAL),
|
|
^(int token) { ViolationHandler(); });
|
|
}
|
|
|
|
void
|
|
nsSandboxViolationSink::Stop()
|
|
{
|
|
if (!mNotifyToken) {
|
|
return;
|
|
}
|
|
notify_cancel(mNotifyToken);
|
|
mNotifyToken = 0;
|
|
}
|
|
|
|
// We need to query syslogd to find out what violations occurred, and whether
|
|
// they were "ours". We can use the Apple System Log facility to do this.
|
|
// Besides calling notify_post("com.apple.sandbox.violation.*"), Apple's
|
|
// sandboxd also reports all sandbox violations (sent to it by the Sandbox
|
|
// kernel extension) to syslogd, which stores them and makes them viewable
|
|
// in the system console. This is the database we query.
|
|
|
|
// ViolationHandler() is always called on its own secondary thread. This
|
|
// makes it unlikely it will interfere with other browser activity.
|
|
|
|
void
|
|
nsSandboxViolationSink::ViolationHandler()
|
|
{
|
|
aslmsg query = asl_new(ASL_TYPE_QUERY);
|
|
|
|
asl_set_query(query, ASL_KEY_FACILITY, "com.apple.sandbox",
|
|
ASL_QUERY_OP_EQUAL);
|
|
|
|
// Only get reports that were generated very recently.
|
|
char query_time[30] = {0};
|
|
snprintf(query_time, sizeof(query_time), "%li", time(NULL) - 2);
|
|
asl_set_query(query, ASL_KEY_TIME, query_time,
|
|
ASL_QUERY_OP_NUMERIC | ASL_QUERY_OP_GREATER_EQUAL);
|
|
|
|
// This code is easier to test if we don't just track "our" violations,
|
|
// which are (normally) few and far between. For example (for the time
|
|
// being at least) four appleeventsd sandbox violations happen every time
|
|
// we start the browser in e10s mode. But it makes sense to default to
|
|
// only tracking "our" violations.
|
|
if (mozilla::Preferences::GetBool(
|
|
"security.sandbox.mac.track.violations.oursonly", true)) {
|
|
// This makes each of our processes log its own violations. It might
|
|
// be better to make the chrome process log all the other processes'
|
|
// violations.
|
|
char query_pid[20] = {0};
|
|
snprintf(query_pid, sizeof(query_pid), "%u", getpid());
|
|
asl_set_query(query, ASL_KEY_REF_PID, query_pid, ASL_QUERY_OP_EQUAL);
|
|
}
|
|
|
|
aslresponse response = asl_search(nullptr, query);
|
|
|
|
// Each time ViolationHandler() is called we grab as many messages as are
|
|
// available. Otherwise we might not get them all.
|
|
if (response) {
|
|
while (true) {
|
|
aslmsg hit = nullptr;
|
|
aslmsg found = nullptr;
|
|
const char* id_str;
|
|
|
|
while ((hit = aslresponse_next(response))) {
|
|
// Record the message id to avoid logging the same violation more
|
|
// than once.
|
|
id_str = asl_get(hit, ASL_KEY_MSG_ID);
|
|
uint64_t id_val = atoll(id_str);
|
|
if (id_val <= mLastMsgReceived) {
|
|
continue;
|
|
}
|
|
mLastMsgReceived = id_val;
|
|
found = hit;
|
|
break;
|
|
}
|
|
if (!found) {
|
|
break;
|
|
}
|
|
|
|
const char* pid_str = asl_get(found, ASL_KEY_REF_PID);
|
|
const char* message_str = asl_get(found, ASL_KEY_MSG);
|
|
nsCocoaDebugUtils::DebugLog("nsSandboxViolationSink::ViolationHandler(): id %s, pid %s, message %s",
|
|
id_str, pid_str, message_str);
|
|
}
|
|
aslresponse_free(response);
|
|
}
|
|
}
|