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Add new FileSourceProvider

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Summary: Add a new interface to JSC that allows loading a file lazily from disk, i.e. using mmap, instead of loading the whole file upfront and copying into the VM.

Reviewed By: michalgr

Differential Revision: D3534042

fbshipit-source-id: 98b193cc7b7e33248073e2556ea94ce3391507c7
This commit is contained in:
Tadeu Zagallo
2016-07-11 06:52:06 -07:00
committed by Facebook Github Bot 9
parent e5650560c0
commit 5d06918d07
11 changed files with 291 additions and 50 deletions
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23
ReactCommon/cxxreact/JSCExecutor.cpp
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@@ -253,10 +253,33 @@ void JSCExecutor::terminateOnJSVMThread() {
m_context = nullptr;
}
#ifdef WITH_FBJSCEXTENSIONS
static void loadApplicationSource(
const JSGlobalContextRef context,
const JSBigMmapString* script,
const std::string& sourceURL) {
String jsSourceURL(sourceURL.c_str());
bool is8bit = script->encoding() == JSBigMmapString::Encoding::Ascii || script->encoding() == JSBigMmapString::Encoding::Utf8;
JSSourceCodeRef sourceCode = JSCreateSourceCode(script->fd(), script->size(), jsSourceURL, script->hash(), is8bit);
evaluateSourceCode(context, sourceCode, jsSourceURL);
JSReleaseSourceCode(sourceCode);
}
#endif
void JSCExecutor::loadApplicationScript(std::unique_ptr<const JSBigString> script, std::string sourceURL) throw(JSException) {
SystraceSection s("JSCExecutor::loadApplicationScript",
"sourceURL", sourceURL);
#ifdef WITH_FBJSCEXTENSIONS
if (auto source = dynamic_cast<const JSBigMmapString *>(script.get())) {
loadApplicationSource(m_context, source, sourceURL);
bindBridge();
flush();
ReactMarker::logMarker("CREATE_REACT_CONTEXT_END");
return;
}
#endif
#ifdef WITH_FBSYSTRACE
fbsystrace_begin_section(
TRACE_TAG_REACT_CXX_BRIDGE,