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/*
* Copyright (C) 2014-2020 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 "FunctionAllowlist.h"
#if ENABLE(JIT)
#include "CodeBlock.h"
#include <stdio.h>
#include <string.h>
#include <wtf/SafeStrerror.h>
#include <wtf/text/MakeString.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
FunctionAllowlist::FunctionAllowlist(const char* filename)
{
if (!filename)
return;
FILE* f = fopen(filename, "r");
if (!f) {
if (errno == ENOENT) {
m_hasActiveAllowlist = true;
m_entries.add(String::fromLatin1(filename));
} else
dataLogF("Failed to open file %s. Did you add the file-read-data entitlement to WebProcess.sb? Error code: %s\n", filename, safeStrerror(errno).data());
return;
}
m_hasActiveAllowlist = true;
char* line;
char buffer[BUFSIZ];
while ((line = fgets(buffer, sizeof(buffer), f))) {
if (strstr(line, "//") == line)
continue;
// Get rid of newlines at the ends of the strings.
size_t length = strlen(line);
if (length && line[length - 1] == '\n') {
line[length - 1] = '\0';
length--;
}
// Skip empty lines.
if (!length)
continue;
m_entries.add(String(unsafeMakeSpan(line, length)));
}
int result = fclose(f);
if (result)
dataLogF("Failed to close file %s: %s\n", filename, safeStrerror(errno).data());
}
bool FunctionAllowlist::contains(CodeBlock* codeBlock) const
{
if (!m_hasActiveAllowlist)
return true;
if (m_entries.isEmpty())
return false;
String name = String::fromUTF8(codeBlock->inferredName().span());
if (m_entries.contains(name))
return true;
String hash = String::fromUTF8(codeBlock->hashAsStringIfPossible().span());
if (m_entries.contains(hash))
return true;
return m_entries.contains(makeString(name, '#', hash));
}
bool FunctionAllowlist::shouldDumpWasmFunction(uint32_t index) const
{
if (!m_hasActiveAllowlist)
return false;
return containsWasmFunction(index);
}
bool FunctionAllowlist::containsWasmFunction(uint32_t index) const
{
if (!m_hasActiveAllowlist)
return true;
if (m_entries.isEmpty())
return false;
return m_entries.contains(String::number(index));
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif // ENABLE(JIT)
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