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Copy pathCorpseSnapshot.cpp
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107 lines (87 loc) · 3.42 KB
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/*
* Copyright (C) 2026 Apple Inc. All rights reserved.
*
* 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 INC. 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 INC. 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 "CorpseSnapshot.h"
#if (OS(MACOS) || USE(APPLE_INTERNAL_SDK)) && !PLATFORM(MACCATALYST) && !PLATFORM(IOS_FAMILY_SIMULATOR)
#include "CorpseError.h"
#include <mach/mach.h>
#include <mach/mach_error.h>
#include <wtf/TZoneMallocInlines.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
namespace Corpse {
WTF_MAKE_TZONE_ALLOCATED_IMPL(Snapshot);
unsigned Snapshot::s_nextId = 1;
// Returns MACH_PORT_NULL if the snapshot could not be taken, having reported why.
static mach_port_t takeSnapshot(Process* process)
{
if (!process || !process->isAttached()) {
Error::report("Could not snapshot: No process attached");
return MACH_PORT_NULL;
}
mach_port_t corpsePort = MACH_PORT_NULL;
kern_return_t kr = task_generate_corpse(process->taskPort(), &corpsePort);
if (kr == KERN_SUCCESS)
return corpsePort;
if (!process->holdsLiveTask()) {
Error::report("Could not snapshot PID %d: the process has terminated",
static_cast<int>(process->pid()));
} else {
Error::report("Could not snapshot PID %d: %s (0x%x)",
static_cast<int>(process->pid()), mach_error_string(kr), kr);
}
return MACH_PORT_NULL;
}
Snapshot::Snapshot(RefPtr<Process> process)
: m_process(WTF::move(process))
, m_corpsePort(takeSnapshot(m_process.get()))
, m_id(s_nextId++)
, m_memory(m_corpsePort)
{
}
Snapshot::~Snapshot()
{
if (isValid())
mach_port_deallocate(mach_task_self(), m_corpsePort);
}
const Vector<Thread>& Snapshot::threads()
{
if (!m_threads)
m_threads = Thread::collect(*this);
return *m_threads;
}
Address Snapshot::symbol(const char* name)
{
if (!name || !*name)
return { };
auto entry = m_symbols.ensure<StringViewHashTranslator>(StringView::fromLatin1(name), [&] {
return WTF::makeUnique<Symbol>(*this, name);
});
return entry.iterator->value->address();
}
} // namespace Corpse
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif // (OS(MACOS) || USE(APPLE_INTERNAL_SDK)) && !PLATFORM(MACCATALYST) && !PLATFORM(IOS_FAMILY_SIMULATOR)