static bool
HandleDynamicLinkFailure(JSContext *cx, CallArgs args, AsmJSModule &module, HandlePropertyName name)
{
if (cx->isExceptionPending())
return false;
uint32_t begin = module.srcBodyStart(); // starts right after 'use asm'
uint32_t end = module.srcEndBeforeCurly();
Rooted<JSFlatString*> src(cx, module.scriptSource()->substringDontDeflate(cx, begin, end));
if (!src)
return false;
RootedFunction fun(cx, NewScriptedFunction(cx, 0, JSFunction::INTERPRETED,
name, JSFunction::FinalizeKind,
TenuredObject));
if (!fun)
return false;
AutoNameVector formals(cx);
if (!formals.reserve(3))
return false;
if (module.globalArgumentName())
formals.infallibleAppend(module.globalArgumentName());
if (module.importArgumentName())
formals.infallibleAppend(module.importArgumentName());
if (module.bufferArgumentName())
formals.infallibleAppend(module.bufferArgumentName());
CompileOptions options(cx);
options.setMutedErrors(module.scriptSource()->mutedErrors())
.setFile(module.scriptSource()->filename())
.setCompileAndGo(false)
.setNoScriptRval(false);
// The exported function inherits an implicit strict context if the module
// also inherited it somehow.
if (module.strict())
options.strictOption = true;
AutoStableStringChars stableChars(cx);
if (!stableChars.initTwoByte(cx, src))
return false;
const char16_t *chars = stableChars.twoByteRange().start().get();
SourceBufferHolder::Ownership ownership = stableChars.maybeGiveOwnershipToCaller()
? SourceBufferHolder::GiveOwnership
: SourceBufferHolder::NoOwnership;
SourceBufferHolder srcBuf(chars, end - begin, ownership);
if (!frontend::CompileFunctionBody(cx, &fun, options, formals, srcBuf,
/* enclosingScope = */ NullPtr()))
return false;
// Call the function we just recompiled.
args.setCallee(ObjectValue(*fun));
return Invoke(cx, args, args.isConstructing() ? CONSTRUCT : NO_CONSTRUCT);
}
static bool
HandleDynamicLinkFailure(JSContext *cx, CallArgs args, AsmJSModule &module, HandlePropertyName name)
{
if (cx->isExceptionPending())
return false;
uint32_t begin = module.charsBegin();
uint32_t end = module.charsEnd();
Rooted<JSStableString*> src(cx, module.scriptSource()->substring(cx, begin, end));
if (!src)
return false;
RootedFunction fun(cx, NewFunction(cx, NullPtr(), nullptr, 0, JSFunction::INTERPRETED,
cx->global(), name, JSFunction::FinalizeKind,
TenuredObject));
if (!fun)
return false;
AutoNameVector formals(cx);
formals.reserve(3);
if (module.globalArgumentName())
formals.infallibleAppend(module.globalArgumentName());
if (module.importArgumentName())
formals.infallibleAppend(module.importArgumentName());
if (module.bufferArgumentName())
formals.infallibleAppend(module.bufferArgumentName());
CompileOptions options(cx);
options.setPrincipals(cx->compartment()->principals)
.setOriginPrincipals(module.scriptSource()->originPrincipals())
.setCompileAndGo(false)
.setNoScriptRval(false);
if (!frontend::CompileFunctionBody(cx, &fun, options, formals, src->chars().get(), end - begin))
return false;
// Call the function we just recompiled.
unsigned argc = args.length();
InvokeArgs args2(cx);
if (!args2.init(argc))
return false;
args2.setCallee(ObjectValue(*fun));
args2.setThis(args.thisv());
for (unsigned i = 0; i < argc; i++)
args2[i].set(args[i]);
if (!Invoke(cx, args2))
return false;
args.rval().set(args2.rval());
return true;
}
static bool
SendBlocksToPerf(JSContext *cx, AsmJSModule &module)
{
if (!PerfBlockEnabled())
return true;
unsigned long funcBaseAddress = (unsigned long) module.codeBase();
const char *filename = module.scriptSource()->filename();
for (unsigned i = 0; i < module.numPerfBlocksFunctions(); i++) {
const AsmJSModule::ProfiledBlocksFunction &func = module.perfProfiledBlocksFunction(i);
size_t size = func.endCodeOffset - func.startCodeOffset;
JSAutoByteString bytes;
const char *name = AtomToPrintableString(cx, func.name, &bytes);
if (!name)
return false;
writePerfSpewerAsmJSBlocksMap(funcBaseAddress, func.startCodeOffset,
func.endInlineCodeOffset, size, filename, name, func.blocks);
}
return true;
}
static bool
SendFunctionsToPerf(JSContext *cx, AsmJSModule &module)
{
if (!PerfFuncEnabled())
return true;
uintptr_t base = (uintptr_t) module.codeBase();
const char *filename = module.scriptSource()->filename();
for (unsigned i = 0; i < module.numPerfFunctions(); i++) {
const AsmJSModule::ProfiledFunction &func = module.perfProfiledFunction(i);
uintptr_t start = base + (unsigned long) func.startCodeOffset;
uintptr_t end = base + (unsigned long) func.endCodeOffset;
JS_ASSERT(end >= start);
size_t size = end - start;
JSAutoByteString bytes;
const char *name = AtomToPrintableString(cx, func.name, &bytes);
if (!name)
return false;
writePerfSpewerAsmJSFunctionMap(start, size, filename, func.lineno, func.columnIndex, name);
}
return true;
}
static bool
HandleDynamicLinkFailure(JSContext *cx, CallArgs args, AsmJSModule &module, HandlePropertyName name)
{
if (cx->isExceptionPending())
return false;
uint32_t begin = module.offsetToEndOfUseAsm();
uint32_t end = module.funcEndBeforeCurly();
Rooted<JSFlatString*> src(cx, module.scriptSource()->substring(cx, begin, end));
if (!src)
return false;
RootedFunction fun(cx, NewFunction(cx, NullPtr(), nullptr, 0, JSFunction::INTERPRETED,
cx->global(), name, JSFunction::FinalizeKind,
TenuredObject));
if (!fun)
return false;
AutoNameVector formals(cx);
formals.reserve(3);
if (module.globalArgumentName())
formals.infallibleAppend(module.globalArgumentName());
if (module.importArgumentName())
formals.infallibleAppend(module.importArgumentName());
if (module.bufferArgumentName())
formals.infallibleAppend(module.bufferArgumentName());
CompileOptions options(cx);
options.setOriginPrincipals(module.scriptSource()->originPrincipals())
.setFile(module.scriptSource()->filename())
.setCompileAndGo(false)
.setNoScriptRval(false);
// The exported function inherits an implicit strict context if the module
// also inherited it somehow.
if (module.strict())
options.strictOption = true;
SourceBufferHolder srcBuf(src->chars(), end - begin, SourceBufferHolder::NoOwnership);
if (!frontend::CompileFunctionBody(cx, &fun, options, formals, srcBuf))
return false;
// Call the function we just recompiled.
args.setCallee(ObjectValue(*fun));
return Invoke(cx, args, args.isConstructing() ? CONSTRUCT : NO_CONSTRUCT);
}
static bool
HandleDynamicLinkFailure(JSContext* cx, const CallArgs& args, AsmJSModule& module,
HandlePropertyName name)
{
if (cx->isExceptionPending())
return false;
// Source discarding is allowed to affect JS semantics because it is never
// enabled for normal JS content.
bool haveSource = module.scriptSource()->hasSourceData();
if (!haveSource && !JSScript::loadSource(cx, module.scriptSource(), &haveSource))
return false;
if (!haveSource) {
JS_ReportError(cx, "asm.js link failure with source discarding enabled");
return false;
}
uint32_t begin = module.srcBodyStart(); // starts right after 'use asm'
uint32_t end = module.srcEndBeforeCurly();
Rooted<JSFlatString*> src(cx, module.scriptSource()->substringDontDeflate(cx, begin, end));
if (!src)
return false;
RootedFunction fun(cx, NewScriptedFunction(cx, 0, JSFunction::INTERPRETED_NORMAL,
name, gc::AllocKind::FUNCTION,
TenuredObject));
if (!fun)
return false;
Rooted<PropertyNameVector> formals(cx, PropertyNameVector(cx));
if (!formals.reserve(3))
return false;
if (module.globalArgumentName())
formals.infallibleAppend(module.globalArgumentName());
if (module.importArgumentName())
formals.infallibleAppend(module.importArgumentName());
if (module.bufferArgumentName())
formals.infallibleAppend(module.bufferArgumentName());
CompileOptions options(cx);
options.setMutedErrors(module.scriptSource()->mutedErrors())
.setFile(module.scriptSource()->filename())
.setNoScriptRval(false);
// The exported function inherits an implicit strict context if the module
// also inherited it somehow.
if (module.strict())
options.strictOption = true;
AutoStableStringChars stableChars(cx);
if (!stableChars.initTwoByte(cx, src))
return false;
const char16_t* chars = stableChars.twoByteRange().start().get();
SourceBufferHolder::Ownership ownership = stableChars.maybeGiveOwnershipToCaller()
? SourceBufferHolder::GiveOwnership
: SourceBufferHolder::NoOwnership;
SourceBufferHolder srcBuf(chars, end - begin, ownership);
if (!frontend::CompileFunctionBody(cx, &fun, options, formals, srcBuf,
/* enclosingScope = */ nullptr))
return false;
// Call the function we just recompiled.
args.setCallee(ObjectValue(*fun));
return Invoke(cx, args, args.isConstructing() ? CONSTRUCT : NO_CONSTRUCT);
}
