bool
XDRState<mode>::codeScript(MutableHandleScript scriptp)
{
RootedScript script(cx());
if (mode == XDR_DECODE) {
script = NULL;
scriptp.set(NULL);
} else {
script = scriptp.get();
}
if (!VersionCheck(this))
return false;
if (!XDRScript(this, NullPtr(), NullPtr(), NullPtr(), &script))
return false;
if (mode == XDR_DECODE) {
JS_ASSERT(!script->compileAndGo);
CallNewScriptHook(cx(), script, NullPtr());
Debugger::onNewScript(cx(), script, NULL);
scriptp.set(script);
}
return true;
}
bool
XDRState<mode>::codeScript(MutableHandleScript scriptp)
{
if (mode == XDR_DECODE)
scriptp.set(nullptr);
else
MOZ_ASSERT(!scriptp->enclosingScope());
if (!VersionCheck(this))
return false;
return XDRScript(this, nullptr, nullptr, nullptr, scriptp);
}
bool
XDRState<mode>::codeScript(MutableHandleScript scriptp)
{
if (mode == XDR_DECODE)
scriptp.set(nullptr);
else
MOZ_ASSERT(!scriptp->enclosingScope());
if (!VersionCheck(this)) {
postProcessContextErrors(cx());
return false;
}
if (!XDRScript(this, nullptr, nullptr, nullptr, scriptp)) {
postProcessContextErrors(cx());
scriptp.set(nullptr);
return false;
}
return true;
}
bool
XDRState<mode>::codeScript(MutableHandleScript scriptp)
{
if (mode == XDR_DECODE)
scriptp.set(nullptr);
if (!VersionCheck(this))
return false;
if (!XDRScript(this, NullPtr(), NullPtr(), NullPtr(), scriptp))
return false;
return true;
}
bool
XDRState<mode>::codeScript(MutableHandleScript scriptp)
{
if (mode == XDR_DECODE)
scriptp.set(nullptr);
if (!VersionCheck(this))
return false;
RootedObject staticLexical(cx(), &cx()->global()->lexicalScope().staticBlock());
if (!XDRScript(this, staticLexical, nullptr, nullptr, scriptp))
return false;
return true;
}
// We only serialize scripts with system principals. So we don't serialize the
// principals when writing a script. Instead, when reading it back, we set the
// principals to the system principals.
nsresult
ReadCachedScript(StartupCache* cache, nsACString& uri, JSContext* cx,
nsIPrincipal* systemPrincipal, MutableHandleScript scriptp)
{
UniquePtr<char[]> buf;
uint32_t len;
nsresult rv = cache->GetBuffer(PromiseFlatCString(uri).get(), &buf, &len);
if (NS_FAILED(rv))
return rv; // don't warn since NOT_AVAILABLE is an ok error
scriptp.set(JS_DecodeScript(cx, buf.get(), len));
if (!scriptp)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
void
ion::GetPcScript(JSContext *cx, MutableHandleScript scriptRes, jsbytecode **pcRes)
{
JS_ASSERT(cx->fp()->beginsIonActivation());
IonSpew(IonSpew_Snapshots, "Recover PC & Script from the last frame.");
JSRuntime *rt = cx->runtime;
// Recover the return address.
IonFrameIterator it(rt->ionTop);
uint8_t *retAddr = it.returnAddress();
uint32_t hash = PcScriptCache::Hash(retAddr);
JS_ASSERT(retAddr != NULL);
// Lazily initialize the cache. The allocation may safely fail and will not GC.
if (JS_UNLIKELY(rt->ionPcScriptCache == NULL)) {
rt->ionPcScriptCache = (PcScriptCache *)js_malloc(sizeof(struct PcScriptCache));
if (rt->ionPcScriptCache)
rt->ionPcScriptCache->clear(rt->gcNumber);
}
// Attempt to lookup address in cache.
if (rt->ionPcScriptCache && rt->ionPcScriptCache->get(rt, hash, retAddr, scriptRes, pcRes))
return;
// Lookup failed: undertake expensive process to recover the innermost inlined frame.
++it; // Skip exit frame.
InlineFrameIterator ifi(&it);
// Set the result.
scriptRes.set(ifi.script());
if (pcRes)
*pcRes = ifi.pc();
// Add entry to cache.
if (rt->ionPcScriptCache)
rt->ionPcScriptCache->add(hash, retAddr, ifi.pc(), ifi.script());
}
