FunctionAllowlist.cpp [plain text]
#include "config.h"
#include "FunctionAllowlist.h"
#if ENABLE(JIT)
#include "CodeBlock.h"
#include <stdio.h>
#include <string.h>
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(filename);
} else
dataLogF("Failed to open file %s. Did you add the file-read-data entitlement to WebProcess.sb? Error code: %s\n", filename, strerror(errno));
return;
}
m_hasActiveAllowlist = true;
char* line;
char buffer[BUFSIZ];
while ((line = fgets(buffer, sizeof(buffer), f))) {
if (strstr(line, "//") == line)
continue;
size_t length = strlen(line);
if (line[length - 1] == '\n') {
line[length - 1] = '\0';
length--;
}
if (!length)
continue;
m_entries.add(String(line, length));
}
int result = fclose(f);
if (result)
dataLogF("Failed to close file %s: %s\n", filename, strerror(errno));
}
bool FunctionAllowlist::contains(CodeBlock* codeBlock) const
{
if (!m_hasActiveAllowlist)
return true;
if (m_entries.isEmpty())
return false;
String name = String::fromUTF8(codeBlock->inferredName());
if (m_entries.contains(name))
return true;
String hash = String::fromUTF8(codeBlock->hashAsStringIfPossible());
if (m_entries.contains(hash))
return true;
return m_entries.contains(name + '#' + hash);
}
}
#endif // ENABLE(JIT)