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/*
* 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 UncheckedKeyHashMap<Display*, Vector<XErrorTrapper*>>& xErrorTrappersMap()
{
static NeverDestroyed<UncheckedKeyHashMap<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)
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