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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/runtime/runtime-utils.h"
#include "src/arguments.h"
#include "src/assembler.h"
#include "src/compiler/wasm-compiler.h"
#include "src/conversions.h"
#include "src/debug/debug.h"
#include "src/factory.h"
#include "src/frames-inl.h"
#include "src/objects-inl.h"
#include "src/v8memory.h"
#include "src/wasm/wasm-module.h"
namespace v8 {
namespace internal {
RUNTIME_FUNCTION(Runtime_WasmMemorySize) {
HandleScope scope(isolate);
DCHECK_EQ(0, args.length());
Handle<JSObject> module_instance;
{
// Get the module JSObject
DisallowHeapAllocation no_allocation;
const Address entry = Isolate::c_entry_fp(isolate->thread_local_top());
Address pc =
Memory::Address_at(entry + StandardFrameConstants::kCallerPCOffset);
Code* code =
isolate->inner_pointer_to_code_cache()->GetCacheEntry(pc)->code;
Object* owning_instance = wasm::GetOwningWasmInstance(code);
CHECK_NOT_NULL(owning_instance);
module_instance = handle(JSObject::cast(owning_instance), isolate);
}
return *isolate->factory()->NewNumberFromInt(
wasm::GetInstanceMemorySize(isolate, module_instance));
}
RUNTIME_FUNCTION(Runtime_WasmGrowMemory) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_UINT32_ARG_CHECKED(delta_pages, 0);
Handle<JSObject> module_instance;
{
// Get the module JSObject
DisallowHeapAllocation no_allocation;
const Address entry = Isolate::c_entry_fp(isolate->thread_local_top());
Address pc =
Memory::Address_at(entry + StandardFrameConstants::kCallerPCOffset);
Code* code =
isolate->inner_pointer_to_code_cache()->GetCacheEntry(pc)->code;
Object* owning_instance = wasm::GetOwningWasmInstance(code);
CHECK_NOT_NULL(owning_instance);
module_instance = handle(JSObject::cast(owning_instance), isolate);
}
return *isolate->factory()->NewNumberFromInt(
wasm::GrowInstanceMemory(isolate, module_instance, delta_pages));
}
RUNTIME_FUNCTION(Runtime_WasmThrowTypeError) {
HandleScope scope(isolate);
DCHECK_EQ(0, args.length());
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kWasmTrapTypeError));
}
RUNTIME_FUNCTION(Runtime_WasmThrow) {
HandleScope scope(isolate);
DCHECK_EQ(2, args.length());
CONVERT_SMI_ARG_CHECKED(lower, 0);
CONVERT_SMI_ARG_CHECKED(upper, 1);
const int32_t thrown_value = (upper << 16) | lower;
return isolate->Throw(*isolate->factory()->NewNumberFromInt(thrown_value));
}
RUNTIME_FUNCTION(Runtime_WasmGetCaughtExceptionValue) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
Object* exception = args[0];
// The unwinder will only deliver exceptions to wasm if the exception is a
// Number or a Smi (which we have just converted to a Number.) This logic
// lives in Isolate::is_catchable_by_wasm(Object*).
CHECK(exception->IsNumber());
return exception;
}
} // namespace internal
} // namespace v8
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