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#include "root.h"
#include "helpers.h"
#include "ZigSourceProvider.h"
#include "JavaScriptCore/BytecodeCacheError.h"
#include "JavaScriptCore/CodeCache.h"
#include "JavaScriptCore/Completion.h"
#include "wtf/Scope.h"
#include "wtf/text/StringHash.h"
#include <sys/stat.h>
extern "C" void RefString__free(void*, void*, unsigned);
namespace Zig {
using Base = JSC::SourceProvider;
using BytecodeCacheGenerator = JSC::BytecodeCacheGenerator;
using UnlinkedFunctionExecutable = JSC::UnlinkedFunctionExecutable;
using CachedBytecode = JSC::CachedBytecode;
using UnlinkedFunctionCodeBlock = JSC::UnlinkedFunctionCodeBlock;
using SourceCode = JSC::SourceCode;
using CodeSpecializationKind = JSC::CodeSpecializationKind;
using SourceOrigin = JSC::SourceOrigin;
using String = WTF::String;
using SourceProviderSourceType = JSC::SourceProviderSourceType;
static char* wasmSourceName = "[WebAssembly Source]";
static size_t wasmSourceName_len = 20;
Ref<SourceProvider> SourceProvider::create(ResolvedSource resolvedSource)
{
void* allocator = resolvedSource.allocator;
JSC::SourceProviderSourceType sourceType = JSC::SourceProviderSourceType::Module;
// JSC owns the memory
if (resolvedSource.hash == 1) {
Ref<WTF::StringImpl> stringImpl_ = WTF::StringImpl::create(resolvedSource.source_code.ptr, resolvedSource.source_code.len);
return adoptRef(*new SourceProvider(
resolvedSource, WTFMove(stringImpl_),
JSC::SourceOrigin(WTF::URL::fileURLWithFileSystemPath(toString(resolvedSource.source_url))),
toStringNotConst(resolvedSource.source_url), TextPosition(),
sourceType));
}
if (allocator) {
Ref<WTF::ExternalStringImpl> stringImpl_ = WTF::ExternalStringImpl::create(
resolvedSource.source_code.ptr, resolvedSource.source_code.len,
allocator,
RefString__free);
return adoptRef(*new SourceProvider(
resolvedSource, WTFMove(stringImpl_),
JSC::SourceOrigin(WTF::URL::fileURLWithFileSystemPath(toString(resolvedSource.source_url))),
toStringNotConst(resolvedSource.source_url), TextPosition(),
sourceType));
} else {
Ref<WTF::ExternalStringImpl> stringImpl_ = WTF::ExternalStringImpl::createStatic(
resolvedSource.source_code.ptr, resolvedSource.source_code.len);
return adoptRef(*new SourceProvider(
resolvedSource, WTFMove(stringImpl_),
JSC::SourceOrigin(WTF::URL::fileURLWithFileSystemPath(toString(resolvedSource.source_url))),
toStringNotConst(resolvedSource.source_url), TextPosition(),
sourceType));
}
}
unsigned SourceProvider::getHash()
{
if (m_hash) {
return m_hash;
}
m_hash = WTF::StringHash::hash(m_source.get());
return m_hash;
}
void SourceProvider::freeSourceCode()
{
if (did_free_source_code) {
return;
}
did_free_source_code = true;
if (m_resolvedSource.allocator != 0) { // // WTF::ExternalStringImpl::destroy(m_source.ptr());
this->m_source = WTF::StringImpl::empty()->isolatedCopy();
this->m_hash = 0;
m_resolvedSource.allocator = 0;
}
// if (m_resolvedSource.allocator != 0) {
// ZigString__free(m_resolvedSource.source_code.ptr, m_resolvedSource.source_code.len,
// m_resolvedSource.allocator);
// }
}
void SourceProvider::updateCache(const UnlinkedFunctionExecutable* executable, const SourceCode&,
CodeSpecializationKind kind,
const UnlinkedFunctionCodeBlock* codeBlock)
{
// if (!m_resolvedSource.bytecodecache_fd || !m_cachedBytecode)
return;
JSC::BytecodeCacheError error;
RefPtr<JSC::CachedBytecode> cachedBytecode = JSC::encodeFunctionCodeBlock(executable->vm(), codeBlock, error);
if (cachedBytecode && !error.isValid())
m_cachedBytecode->addFunctionUpdate(executable, kind, *cachedBytecode);
}
void SourceProvider::cacheBytecode(const BytecodeCacheGenerator& generator)
{
// if (!m_resolvedSource.bytecodecache_fd)
return;
if (!m_cachedBytecode)
m_cachedBytecode = JSC::CachedBytecode::create();
auto update = generator();
if (update)
m_cachedBytecode->addGlobalUpdate(*update);
}
void SourceProvider::commitCachedBytecode()
{
// if (!m_resolvedSource.bytecodecache_fd || !m_cachedBytecode || !m_cachedBytecode->hasUpdates())
return;
// auto clearBytecode = WTF::makeScopeExit([&] { m_cachedBytecode = nullptr; });
// const auto fd = m_resolvedSource.bytecodecache_fd;
// auto fileSize = FileSystem::fileSize(fd);
// if (!fileSize)
// return;
// size_t cacheFileSize;
// if (!WTF::convertSafely(*fileSize, cacheFileSize) || cacheFileSize != m_cachedBytecode->size()) {
// // The bytecode cache has already been updated
// return;
// }
// if (!FileSystem::truncateFile(fd, m_cachedBytecode->sizeForUpdate()))
// return;
// m_cachedBytecode->commitUpdates([&](off_t offset, const void* data, size_t size) {
// long long result = FileSystem::seekFile(fd, offset, FileSystem::FileSeekOrigin::Beginning);
// ASSERT_UNUSED(result, result != -1);
// size_t bytesWritten = static_cast<size_t>(FileSystem::writeToFile(fd, data, size));
// ASSERT_UNUSED(bytesWritten, bytesWritten == size);
// });
}
bool SourceProvider::isBytecodeCacheEnabled() const
{
// return m_resolvedSource.bytecodecache_fd > 0;
return false;
}
void SourceProvider::readOrGenerateByteCodeCache(JSC::VM& vm, const JSC::SourceCode& sourceCode)
{
// auto status = this->readCache(vm, sourceCode);
// switch (status) {
// case -1: {
// m_resolvedSource.bytecodecache_fd = 0;
// break;
// }
// case 0: {
// JSC::BytecodeCacheError err;
// m_cachedBytecode = JSC::generateModuleBytecode(vm, sourceCode, m_resolvedSource.bytecodecache_fd, err);
// if (err.isValid()) {
// m_resolvedSource.bytecodecache_fd = 0;
// m_cachedBytecode = JSC::CachedBytecode::create();
// }
// }
// // TODO: read the bytecode into a JSC::SourceCode object here
// case 1: {
// }
// }
}
int SourceProvider::readCache(JSC::VM& vm, const JSC::SourceCode& sourceCode)
{
return -1;
// if (m_resolvedSource.bytecodecache_fd == 0)
// return -1;
// if (!FileSystem::isHandleValid(m_resolvedSource.bytecodecache_fd))
// return -1;
// const auto fd = m_resolvedSource.bytecodecache_fd;
// bool success;
// FileSystem::MappedFileData mappedFile(fd, FileSystem::MappedFileMode::Shared, success);
// if (!success)
// return -1;
// const uint8_t* fileData = reinterpret_cast<const uint8_t*>(mappedFile.data());
// unsigned fileTotalSize = mappedFile.size();
// if (fileTotalSize == 0)
// return 0;
// Ref<JSC::CachedBytecode> cachedBytecode = JSC::CachedBytecode::create(WTFMove(mappedFile));
// // auto key = JSC::sourceCodeKeyForSerializedModule(vm, sourceCode);
// // if (isCachedBytecodeStillValid(vm, cachedBytecode.copyRef(), key,
// // JSC::SourceCodeType::ModuleType)) {
// m_cachedBytecode = WTFMove(cachedBytecode);
// return 1;
// } else {
// FileSystem::truncateFile(fd, 0);
// return 0;
// }
}
}; // namespace Zig
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