DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (b6d82b1a6b02)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* JavaScript modules (as in, the syntactic construct) implementation. */

#include "js/Modules.h"

#include "mozilla/Assertions.h"  // MOZ_ASSERT
#include "mozilla/Utf8.h"        // mozilla::Utf8Unit

#include <stdint.h>  // uint32_t

#include "jsapi.h"    // js::AssertHeapIsIdle
#include "jstypes.h"  // JS_PUBLIC_API

#include "builtin/ModuleObject.h"  // js::FinishDynamicModuleImport, js::{,Requested}ModuleObject
#include "frontend/BytecodeCompiler.h"  // js::frontend::CompileModule
#include "js/RootingAPI.h"              // JS::MutableHandle
#include "js/Value.h"                   // JS::Value
#include "vm/JSContext.h"               // CHECK_THREAD, JSContext
#include "vm/JSObject.h"                // JSObject
#include "vm/Runtime.h"                 // JSRuntime

#include "vm/JSContext-inl.h"  // JSContext::{c,releaseC}heck

using mozilla::Utf8Unit;

using js::AssertHeapIsIdle;
using js::ModuleObject;
using js::RequestedModuleObject;

JS_PUBLIC_API JS::ModuleResolveHook JS::GetModuleResolveHook(JSRuntime* rt) {
  AssertHeapIsIdle();

  return rt->moduleResolveHook;
}

JS_PUBLIC_API void JS::SetModuleResolveHook(JSRuntime* rt,
                                            ModuleResolveHook func) {
  AssertHeapIsIdle();

  rt->moduleResolveHook = func;
}

JS_PUBLIC_API JS::ModuleMetadataHook JS::GetModuleMetadataHook(JSRuntime* rt) {
  AssertHeapIsIdle();

  return rt->moduleMetadataHook;
}

JS_PUBLIC_API void JS::SetModuleMetadataHook(JSRuntime* rt,
                                             ModuleMetadataHook func) {
  AssertHeapIsIdle();

  rt->moduleMetadataHook = func;
}

JS_PUBLIC_API JS::ModuleDynamicImportHook JS::GetModuleDynamicImportHook(
    JSRuntime* rt) {
  AssertHeapIsIdle();

  return rt->moduleDynamicImportHook;
}

JS_PUBLIC_API void JS::SetModuleDynamicImportHook(
    JSRuntime* rt, ModuleDynamicImportHook func) {
  AssertHeapIsIdle();

  rt->moduleDynamicImportHook = func;
}

JS_PUBLIC_API bool JS::FinishDynamicModuleImport(
    JSContext* cx, Handle<Value> referencingPrivate,
    Handle<JSString*> specifier, Handle<JSObject*> promise) {
  AssertHeapIsIdle();
  CHECK_THREAD(cx);
  cx->check(referencingPrivate, promise);

  return js::FinishDynamicModuleImport(cx, referencingPrivate, specifier,
                                       promise);
}

template <typename Unit>
static JSObject* CompileModuleHelper(JSContext* cx,
                                     const JS::ReadOnlyCompileOptions& options,
                                     JS::SourceText<Unit>& srcBuf) {
  MOZ_ASSERT(!cx->zone()->isAtomsZone());
  AssertHeapIsIdle();
  CHECK_THREAD(cx);

  return js::frontend::CompileModule(cx, options, srcBuf);
}

JS_PUBLIC_API JSObject* JS::CompileModule(JSContext* cx,
                                          const ReadOnlyCompileOptions& options,
                                          SourceText<char16_t>& srcBuf) {
  return CompileModuleHelper(cx, options, srcBuf);
}

JS_PUBLIC_API JSObject* JS::CompileModuleDontInflate(
    JSContext* cx, const ReadOnlyCompileOptions& options,
    SourceText<Utf8Unit>& srcBuf) {
  return CompileModuleHelper(cx, options, srcBuf);
}

JS_PUBLIC_API void JS::SetModulePrivate(JSObject* module, const Value& value) {
  JSRuntime* rt = module->zone()->runtimeFromMainThread();
  module->as<ModuleObject>().scriptSourceObject()->setPrivate(rt, value);
}

JS_PUBLIC_API JS::Value JS::GetModulePrivate(JSObject* module) {
  return module->as<ModuleObject>().scriptSourceObject()->canonicalPrivate();
}

JS_PUBLIC_API bool JS::ModuleInstantiate(JSContext* cx,
                                         Handle<JSObject*> moduleArg) {
  AssertHeapIsIdle();
  CHECK_THREAD(cx);
  cx->releaseCheck(moduleArg);

  return ModuleObject::Instantiate(cx, moduleArg.as<ModuleObject>());
}

JS_PUBLIC_API bool JS::ModuleEvaluate(JSContext* cx,
                                      Handle<JSObject*> moduleArg) {
  AssertHeapIsIdle();
  CHECK_THREAD(cx);
  cx->releaseCheck(moduleArg);

  return ModuleObject::Evaluate(cx, moduleArg.as<ModuleObject>());
}

JS_PUBLIC_API JSObject* JS::GetRequestedModules(JSContext* cx,
                                                Handle<JSObject*> moduleArg) {
  AssertHeapIsIdle();
  CHECK_THREAD(cx);
  cx->check(moduleArg);

  return &moduleArg->as<ModuleObject>().requestedModules();
}

JS_PUBLIC_API JSString* JS::GetRequestedModuleSpecifier(JSContext* cx,
                                                        Handle<Value> value) {
  AssertHeapIsIdle();
  CHECK_THREAD(cx);
  cx->check(value);

  JSObject* obj = &value.toObject();
  return obj->as<RequestedModuleObject>().moduleSpecifier();
}

JS_PUBLIC_API void JS::GetRequestedModuleSourcePos(JSContext* cx,
                                                   JS::HandleValue value,
                                                   uint32_t* lineNumber,
                                                   uint32_t* columnNumber) {
  AssertHeapIsIdle();
  CHECK_THREAD(cx);
  cx->check(value);
  MOZ_ASSERT(lineNumber);
  MOZ_ASSERT(columnNumber);

  auto& requested = value.toObject().as<RequestedModuleObject>();
  *lineNumber = requested.lineNumber();
  *columnNumber = requested.columnNumber();
}

JS_PUBLIC_API JSScript* JS::GetModuleScript(JS::HandleObject moduleRecord) {
  AssertHeapIsIdle();

  return moduleRecord->as<ModuleObject>().script();
}