| /* |
| * Copyright (C) 2016 Igalia S.L |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "XErrorTrapper.h" |
| |
| #if PLATFORM(X11) |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <wtf/HashMap.h> |
| #include <wtf/NeverDestroyed.h> |
| |
| namespace WebCore { |
| |
| static HashMap<Display*, Vector<XErrorTrapper*>>& xErrorTrappersMap() |
| { |
| static NeverDestroyed<HashMap<Display*, Vector<XErrorTrapper*>>> trappersMap; |
| return trappersMap; |
| } |
| |
| XErrorTrapper::XErrorTrapper(Display* display, Policy policy, Vector<unsigned char>&& expectedErrors) |
| : m_display(display) |
| , m_policy(policy) |
| , m_expectedErrors(WTFMove(expectedErrors)) |
| { |
| xErrorTrappersMap().add(m_display, Vector<XErrorTrapper*>()).iterator->value.append(this); |
| m_previousErrorHandler = XSetErrorHandler([](Display* display, XErrorEvent* event) -> int { |
| auto iterator = xErrorTrappersMap().find(display); |
| if (iterator == xErrorTrappersMap().end()) |
| return 0; |
| |
| ASSERT(!iterator->value.isEmpty()); |
| iterator->value.last()->errorEvent(event); |
| return 0; |
| }); |
| } |
| |
| XErrorTrapper::~XErrorTrapper() |
| { |
| XSync(m_display, False); |
| auto iterator = xErrorTrappersMap().find(m_display); |
| ASSERT(iterator != xErrorTrappersMap().end()); |
| auto* trapper = iterator->value.takeLast(); |
| ASSERT_UNUSED(trapper, trapper == this); |
| if (iterator->value.isEmpty()) |
| xErrorTrappersMap().remove(iterator); |
| |
| XSetErrorHandler(m_previousErrorHandler); |
| } |
| |
| unsigned char XErrorTrapper::errorCode() const |
| { |
| XSync(m_display, False); |
| return m_errorCode; |
| } |
| |
| void XErrorTrapper::errorEvent(XErrorEvent* event) |
| { |
| m_errorCode = event->error_code; |
| if (m_policy == Policy::Ignore) |
| return; |
| |
| if (m_expectedErrors.contains(m_errorCode)) |
| return; |
| |
| static const char errorFormatString[] = "The program with pid %d received an X Window System error.\n" |
| "The error was '%s'.\n" |
| " (Details: serial %ld error_code %d request_code %d minor_code %d)\n"; |
| char errorMessage[64]; |
| XGetErrorText(m_display, m_errorCode, errorMessage, 63); |
| WTFLogAlways(errorFormatString, getpid(), errorMessage, event->serial, event->error_code, event->request_code, event->minor_code); |
| |
| if (m_policy == Policy::Crash) |
| CRASH(); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // PLATFORM(X11) |