static bool
CreateLazyScriptsForCompartment(JSContext* cx)
{
AutoObjectVector lazyFunctions(cx);
// Find all live root lazy functions in the compartment: those which
// have not been compiled, which have a source object, indicating that
// they have a parent, and which do not have an uncompiled enclosing
// script. The last condition is so that we don't compile lazy scripts
// whose enclosing scripts failed to compile, indicating that the lazy
// script did not escape the script.
//
// Note that while we ideally iterate over LazyScripts, LazyScripts do not
// currently stand in 1-1 relation with JSScripts; JSFunctions with the
// same LazyScript may create different JSScripts due to relazification of
// clones. See bug 1105306.
for (gc::ZoneCellIter i(cx->zone(), JSFunction::FinalizeKind); !i.done(); i.next()) {
JSObject* obj = i.get<JSObject>();
if (obj->compartment() == cx->compartment() && obj->is<JSFunction>()) {
JSFunction* fun = &obj->as<JSFunction>();
if (fun->isInterpretedLazy()) {
LazyScript* lazy = fun->lazyScriptOrNull();
if (lazy && lazy->sourceObject() && !lazy->maybeScript() &&
!lazy->hasUncompiledEnclosingScript())
{
if (!lazyFunctions.append(fun))
return false;
}
}
}
}
// Create scripts for each lazy function, updating the list of functions to
// process with any newly exposed inner functions in created scripts.
// A function cannot be delazified until its outer script exists.
for (size_t i = 0; i < lazyFunctions.length(); i++) {
JSFunction* fun = &lazyFunctions[i]->as<JSFunction>();
// lazyFunctions may have been populated with multiple functions for
// a lazy script.
if (!fun->isInterpretedLazy())
continue;
LazyScript* lazy = fun->lazyScript();
bool lazyScriptHadNoScript = !lazy->maybeScript();
JSScript* script = fun->getOrCreateScript(cx);
if (!script)
return false;
if (lazyScriptHadNoScript && !AddInnerLazyFunctionsFromScript(script, lazyFunctions))
return false;
}
return true;
}
static bool
CreateLazyScriptsForCompartment(JSContext *cx)
{
AutoObjectVector lazyFunctions(cx);
// Find all live lazy scripts in the compartment, and via them all root
// lazy functions in the compartment: those which have not been compiled,
// which have a source object, indicating that they have a parent, and
// which do not have an uncompiled enclosing script. The last condition is
// so that we don't compile lazy scripts whose enclosing scripts failed to
// compile, indicating that the lazy script did not escape the script.
for (gc::ZoneCellIter i(cx->zone(), gc::FINALIZE_LAZY_SCRIPT); !i.done(); i.next()) {
LazyScript *lazy = i.get<LazyScript>();
JSFunction *fun = lazy->functionNonDelazifying();
if (fun->compartment() == cx->compartment() &&
lazy->sourceObject() && !lazy->maybeScript() &&
!lazy->hasUncompiledEnclosingScript())
{
MOZ_ASSERT(fun->isInterpretedLazy());
MOZ_ASSERT(lazy == fun->lazyScriptOrNull());
if (!lazyFunctions.append(fun))
return false;
}
}
// Create scripts for each lazy function, updating the list of functions to
// process with any newly exposed inner functions in created scripts.
// A function cannot be delazified until its outer script exists.
for (size_t i = 0; i < lazyFunctions.length(); i++) {
JSFunction *fun = &lazyFunctions[i]->as<JSFunction>();
// lazyFunctions may have been populated with multiple functions for
// a lazy script.
if (!fun->isInterpretedLazy())
continue;
JSScript *script = fun->getOrCreateScript(cx);
if (!script)
return false;
if (!AddInnerLazyFunctionsFromScript(script, lazyFunctions))
return false;
}
return true;
}
static bool
AddLazyFunctionsForCompartment(JSContext* cx, AutoObjectVector& lazyFunctions, AllocKind kind)
{
// Find all live root lazy functions in the compartment: those which have a
// source object, indicating that they have a parent, and which do not have
// an uncompiled enclosing script. The last condition is so that we don't
// compile lazy scripts whose enclosing scripts failed to compile,
// indicating that the lazy script did not escape the script.
//
// Some LazyScripts have a non-null |JSScript* script| pointer. We still
// want to delazify in that case: this pointer is weak so the JSScript
// could be destroyed at the next GC.
for (auto i = cx->zone()->cellIter<JSObject>(kind); !i.done(); i.next()) {
JSFunction* fun = &i->as<JSFunction>();
// Sweeping is incremental; take care to not delazify functions that
// are about to be finalized. GC things referenced by objects that are
// about to be finalized (e.g., in slots) may already be freed.
if (gc::IsAboutToBeFinalizedUnbarriered(&fun) ||
fun->compartment() != cx->compartment())
{
continue;
}
if (fun->isInterpretedLazy()) {
LazyScript* lazy = fun->lazyScriptOrNull();
if (lazy && lazy->sourceObject() && !lazy->hasUncompiledEnclosingScript()) {
if (!lazyFunctions.append(fun))
return false;
}
}
}
return true;
}
static bool
AddLazyFunctionsForCompartment(JSContext* cx, AutoObjectVector& lazyFunctions, AllocKind kind)
{
// Find all live root lazy functions in the compartment: those which
// have not been compiled, which have a source object, indicating that
// they have a parent, and which do not have an uncompiled enclosing
// script. The last condition is so that we don't compile lazy scripts
// whose enclosing scripts failed to compile, indicating that the lazy
// script did not escape the script.
for (gc::ZoneCellIter i(cx->zone(), kind); !i.done(); i.next()) {
JSObject* obj = i.get<JSObject>();
// Sweeping is incremental; take care to not delazify functions that
// are about to be finalized. GC things referenced by objects that are
// about to be finalized (e.g., in slots) may already be freed.
if (gc::IsObjectAboutToBeFinalized(&obj) ||
obj->compartment() != cx->compartment() ||
!obj->is<JSFunction>())
{
continue;
}
JSFunction* fun = &obj->as<JSFunction>();
if (fun->isInterpretedLazy()) {
LazyScript* lazy = fun->lazyScriptOrNull();
if (lazy && lazy->sourceObject() && !lazy->maybeScript() &&
!lazy->hasUncompiledEnclosingScript())
{
if (!lazyFunctions.append(fun))
return false;
}
}
}
return true;
}