1 files changed, 264 insertions, 0 deletions
diff --git a/js/src/shell/jsshell.h b/js/src/shell/jsshell.h
new file mode 100644
index 0000000000..a5be15cb35
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+++ b/js/src/shell/jsshell.h
@@ -0,0 +1,264 @@
+/* -*- 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/. */
+
+#ifndef jsshell_js_h
+#define jsshell_js_h
+
+#include "mozilla/Atomics.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/TimeStamp.h"
+
+#include "builtin/MapObject.h"
+#include "js/CompileOptions.h"
+#include "js/GCVector.h"
+#include "shell/ModuleLoader.h"
+#include "threading/ConditionVariable.h"
+#include "threading/LockGuard.h"
+#include "threading/Mutex.h"
+#include "threading/Thread.h"
+#include "vm/GeckoProfiler.h"
+#include "vm/Monitor.h"
+
+// Some platform hooks must be implemented for single-step profiling.
+#if defined(JS_SIMULATOR_ARM) || defined(JS_SIMULATOR_MIPS64) || \
+    defined(JS_SIMULATOR_MIPS32)
+#  define SINGLESTEP_PROFILING
+#endif
+
+namespace js {
+namespace shell {
+
+// Define use of application-specific slots on the shell's global object.
+enum GlobalAppSlot { GlobalAppSlotModuleRegistry, GlobalAppSlotCount };
+static_assert(GlobalAppSlotCount <= JSCLASS_GLOBAL_APPLICATION_SLOTS,
+              "Too many applications slots defined for shell global");
+
+enum JSShellErrNum {
+#define MSG_DEF(name, count, exception, format) name,
+#include "jsshell.msg"
+#undef MSG_DEF
+  JSShellErr_Limit
+};
+
+const JSErrorFormatString* my_GetErrorMessage(void* userRef,
+                                              const unsigned errorNumber);
+
+void WarningReporter(JSContext* cx, JSErrorReport* report);
+
+class MOZ_STACK_CLASS AutoReportException {
+  JSContext* cx;
+
+ public:
+  explicit AutoReportException(JSContext* cx) : cx(cx) {}
+  ~AutoReportException();
+};
+
+bool GenerateInterfaceHelp(JSContext* cx, JS::HandleObject obj,
+                           const char* name);
+
+JSString* FileAsString(JSContext* cx, JS::HandleString pathnameStr);
+
+class AutoCloseFile {
+ private:
+  FILE* f_;
+
+ public:
+  explicit AutoCloseFile(FILE* f) : f_(f) {}
+  ~AutoCloseFile() { (void)release(); }
+  bool release() {
+    bool success = true;
+    if (f_ && f_ != stdin && f_ != stdout && f_ != stderr) {
+      success = !fclose(f_);
+    }
+    f_ = nullptr;
+    return success;
+  }
+};
+
+// Reference counted file.
+struct RCFile {
+  FILE* fp;
+  uint32_t numRefs;
+
+  RCFile() : fp(nullptr), numRefs(0) {}
+  explicit RCFile(FILE* fp) : fp(fp), numRefs(0) {}
+
+  void acquire() { numRefs++; }
+
+  // Starts out with a ref count of zero.
+  static RCFile* create(JSContext* cx, const char* filename, const char* mode);
+
+  void close();
+  bool isOpen() const { return fp; }
+  bool release();
+};
+
+// Shell command-line arguments and count.
+extern int sArgc;
+extern char** sArgv;
+
+// Shell state set once at startup.
+extern const char* selfHostedXDRPath;
+extern bool encodeSelfHostedCode;
+extern bool enableCodeCoverage;
+extern bool enableDisassemblyDumps;
+extern bool offthreadCompilation;
+extern JS::DelazificationOption defaultDelazificationMode;
+extern bool enableAsmJS;
+extern bool enableWasm;
+extern bool enableSharedMemory;
+extern bool enableWasmBaseline;
+extern bool enableWasmOptimizing;
+
+#define WASM_FEATURE(NAME, ...) extern bool enableWasm##NAME;
+JS_FOR_WASM_FEATURES(WASM_FEATURE, WASM_FEATURE, WASM_FEATURE);
+#undef WASM_FEATURE
+
+extern bool enableWasmVerbose;
+extern bool enableTestWasmAwaitTier2;
+extern bool enableSourcePragmas;
+extern bool enableAsyncStacks;
+extern bool enableAsyncStackCaptureDebuggeeOnly;
+extern bool enableWeakRefs;
+extern bool enableToSource;
+extern bool enablePropertyErrorMessageFix;
+extern bool enableIteratorHelpers;
+extern bool enableShadowRealms;
+extern bool enableArrayGrouping;
+extern bool enableArrayFromAsync;
+extern bool enablePrivateClassFields;
+extern bool enablePrivateClassMethods;
+#ifdef ENABLE_CHANGE_ARRAY_BY_COPY
+extern bool enableChangeArrayByCopy;
+#endif
+#ifdef ENABLE_NEW_SET_METHODS
+extern bool enableNewSetMethods;
+#endif
+extern bool enableClassStaticBlocks;
+extern bool enableImportAssertions;
+#ifdef JS_GC_ZEAL
+extern uint32_t gZealBits;
+extern uint32_t gZealFrequency;
+#endif
+extern bool printTiming;
+extern RCFile* gErrFile;
+extern RCFile* gOutFile;
+extern bool reportWarnings;
+extern bool compileOnly;
+extern bool disableOOMFunctions;
+extern bool defaultToSameCompartment;
+
+#ifdef DEBUG
+extern bool dumpEntrainedVariables;
+extern bool OOM_printAllocationCount;
+#endif
+
+extern bool useFdlibmForSinCosTan;
+
+extern UniqueChars processWideModuleLoadPath;
+
+// Alias the global dstName to namespaceObj.srcName. For example, if dstName is
+// "snarf", namespaceObj represents "os.file", and srcName is "readFile", then
+// this is equivalent to the JS code:
+//
+//   snarf = os.file.readFile;
+//
+// This provides a mechanism for namespacing the various JS shell helper
+// functions without breaking backwards compatibility with things that use the
+// global names.
+bool CreateAlias(JSContext* cx, const char* dstName,
+                 JS::HandleObject namespaceObj, const char* srcName);
+
+class NonshrinkingGCObjectVector
+    : public GCVector<HeapPtr<JSObject*>, 0, SystemAllocPolicy> {
+ public:
+  bool traceWeak(JSTracer* trc) {
+    for (HeapPtr<JSObject*>& obj : *this) {
+      TraceWeakEdge(trc, &obj, "NonshrinkingGCObjectVector element");
+    }
+    return true;
+  }
+};
+
+using MarkBitObservers = JS::WeakCache<NonshrinkingGCObjectVector>;
+
+#ifdef SINGLESTEP_PROFILING
+using StackChars = Vector<char16_t, 0, SystemAllocPolicy>;
+#endif
+
+class OffThreadJob;
+
+// Per-context shell state.
+struct ShellContext {
+  explicit ShellContext(JSContext* cx);
+  ~ShellContext();
+
+  bool isWorker;
+  bool lastWarningEnabled;
+
+  // Track promise rejections and report unhandled rejections.
+  bool trackUnhandledRejections;
+
+  double timeoutInterval;
+  double startTime;
+  mozilla::Atomic<bool> serviceInterrupt;
+  mozilla::Atomic<bool> haveInterruptFunc;
+  JS::PersistentRootedValue interruptFunc;
+  JS::PersistentRootedValue lastWarning;
+  JS::PersistentRootedValue promiseRejectionTrackerCallback;
+
+  // Rejected promises that are not yet handled. Added when rejection
+  // happens, and removed when rejection is handled. This uses SetObject to
+  // report unhandled rejections in the rejected order.
+  JS::PersistentRooted<SetObject*> unhandledRejectedPromises;
+
+#ifdef SINGLESTEP_PROFILING
+  Vector<StackChars, 0, SystemAllocPolicy> stacks;
+#endif
+
+  /*
+   * Watchdog thread state.
+   */
+  js::Mutex watchdogLock MOZ_UNANNOTATED;
+  js::ConditionVariable watchdogWakeup;
+  mozilla::Maybe<js::Thread> watchdogThread;
+  mozilla::Maybe<mozilla::TimeStamp> watchdogTimeout;
+
+  js::ConditionVariable sleepWakeup;
+
+  int exitCode;
+  bool quitting;
+
+  JS::UniqueChars readLineBuf;
+  size_t readLineBufPos;
+
+  js::shell::RCFile** errFilePtr;
+  js::shell::RCFile** outFilePtr;
+
+  UniquePtr<ProfilingStack> geckoProfilingStack;
+
+  UniquePtr<ModuleLoader> moduleLoader;
+
+  UniquePtr<MarkBitObservers> markObservers;
+
+  // Off-thread parse state.
+  js::Monitor offThreadMonitor MOZ_UNANNOTATED;
+  Vector<OffThreadJob*, 0, SystemAllocPolicy> offThreadJobs;
+
+  // Queued finalization registry cleanup jobs.
+  using FunctionVector = GCVector<JSFunction*, 0, SystemAllocPolicy>;
+  JS::PersistentRooted<FunctionVector> finalizationRegistryCleanupCallbacks;
+};
+
+extern ShellContext* GetShellContext(JSContext* cx);
+
+[[nodiscard]] extern bool PrintStackTrace(JSContext* cx,
+                                          JS::Handle<JSObject*> stackObj);
+
+} /* namespace shell */
+} /* namespace js */
+
+#endif