static bool
DecodeFunctionBodies(JSContext* cx, Decoder& d, ModuleGenerator& mg)
{
if (!mg.startFuncDefs())
return false;
uint32_t sectionStart;
if (!d.startSection(FunctionBodiesId, §ionStart))
return Fail(cx, d, "failed to start section");
if (sectionStart == Decoder::NotStarted) {
if (mg.numFuncSigs() != 0)
return Fail(cx, d, "expected function bodies");
return mg.finishFuncDefs();
}
uint32_t numFuncBodies;
if (!d.readVarU32(&numFuncBodies))
return Fail(cx, d, "expected function body count");
if (numFuncBodies != mg.numFuncSigs())
return Fail(cx, d, "function body count does not match function signature count");
for (uint32_t funcIndex = 0; funcIndex < numFuncBodies; funcIndex++) {
if (!DecodeFunctionBody(cx, d, mg, funcIndex))
return false;
}
if (!d.finishSection(sectionStart))
return Fail(cx, d, "function section byte size mismatch");
return mg.finishFuncDefs();
}
static bool
DecodeExport(JSContext* cx, Decoder& d, ModuleGenerator& mg, ExportMap* exportMap)
{
if (!d.readCStringIf(FuncSubsection))
return Fail(cx, d, "expected 'func' tag");
uint32_t funcIndex;
if (!d.readVarU32(&funcIndex))
return Fail(cx, d, "expected export internal index");
if (funcIndex >= mg.numFuncSigs())
return Fail(cx, d, "export function index out of range");
uint32_t exportIndex;
if (!mg.declareExport(funcIndex, &exportIndex))
return false;
MOZ_ASSERT(exportIndex <= exportMap->exportNames.length());
if (exportIndex == exportMap->exportNames.length()) {
UniqueChars funcName(JS_smprintf("%u", unsigned(funcIndex)));
if (!funcName || !exportMap->exportNames.emplaceBack(Move(funcName)))
return false;
}
if (!exportMap->fieldsToExports.append(exportIndex))
return false;
const char* chars;
if (!d.readCString(&chars))
return Fail(cx, d, "expected export external name string");
return exportMap->fieldNames.emplaceBack(DuplicateString(chars));
}
static bool
DecodeCodeSection(JSContext* cx, Decoder& d, ModuleGenerator& mg)
{
if (!mg.startFuncDefs())
return false;
uint32_t funcIndex = 0;
while (d.readCStringIf(CodeSection)) {
uint32_t sectionStart;
if (!d.startSection(§ionStart))
return Fail(cx, d, "expected code section byte size");
uint32_t numFuncs;
if (!d.readVarU32(&numFuncs))
return Fail(cx, d, "expected number of functions");
if (funcIndex + numFuncs > mg.numFuncSigs())
return Fail(cx, d, "more function definitions than declarations");
for (uint32_t i = 0; i < numFuncs; i++) {
if (!DecodeFunc(cx, d, mg, funcIndex++))
return false;
}
if (!d.finishSection(sectionStart))
return Fail(cx, d, "code section byte size mismatch");
}
if (funcIndex != mg.numFuncSigs())
return Fail(cx, d, "fewer function definitions than declarations");
if (!mg.finishFuncDefs())
return false;
return true;
}
static bool
DecodeFunctionSections(JSContext* cx, Decoder& d, ModuleGenerator& mg)
{
if (!mg.startFuncDefs())
return false;
uint32_t funcIndex = 0;
for (; d.readCStringIf(FuncLabel); funcIndex++) {
if (funcIndex >= mg.numFuncSigs())
return Fail(cx, d, "more function definitions than declarations");
if (!DecodeFunctionSection(cx, d, mg, funcIndex))
return false;
}
if (funcIndex < mg.numFuncSigs())
return Fail(cx, d, "fewer function definitions than declarations");
if (!mg.finishFuncDefs())
return false;
return true;
}
static bool
DecodeFunctionExport(JSContext* cx, Decoder& d, ModuleGenerator& mg, CStringSet* dupSet)
{
uint32_t funcIndex;
if (!d.readVarU32(&funcIndex))
return Fail(cx, d, "expected export internal index");
if (funcIndex >= mg.numFuncSigs())
return Fail(cx, d, "export function index out of range");
UniqueChars fieldName = DecodeFieldName(cx, d, dupSet);
if (!fieldName)
return false;
return mg.declareExport(Move(fieldName), funcIndex);
}
