1 files changed, 90 insertions, 0 deletions
diff --git a/js/src/debugger/NoExecute.cpp b/js/src/debugger/NoExecute.cpp
new file mode 100644
index 0000000000..028dc65484
--- /dev/null
+++ b/js/src/debugger/NoExecute.cpp
@@ -0,0 +1,90 @@
+/* -*- 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/. */
+
+#include "debugger/NoExecute.h"
+
+#include "mozilla/Sprintf.h"  // for SprintfLiteral
+
+#include <stdio.h>  // for fprintf, stdout
+
+#include "debugger/Debugger.h"        // for Debugger
+#include "js/friend/DumpFunctions.h"  // for DumpBacktrace
+#include "js/friend/ErrorMessages.h"  // for GetErrorMessage, JSMSG_DEBUGGEE_WOULD_RUN
+#include "js/Promise.h"               // for AutoDebuggerJobQueueInterruption
+#include "js/RootingAPI.h"            // for Handle
+#include "vm/JSContext.h"             // for ProtectedDataContextArg, JSContext
+#include "vm/JSScript.h"              // for JSScript
+#include "vm/Realm.h"                 // for AutoRealm, Realm
+#include "vm/Warnings.h"              // for WarnNumberUTF8
+
+#include "gc/StableCellHasher-inl.h"
+#include "vm/Realm-inl.h"  // for AutoRealm::AutoRealm
+
+using namespace js;
+
+EnterDebuggeeNoExecute::EnterDebuggeeNoExecute(
+    JSContext* cx, Debugger& dbg,
+    const JS::AutoDebuggerJobQueueInterruption& adjqiProof)
+    : dbg_(dbg), unlocked_(nullptr), reported_(false) {
+  MOZ_ASSERT(adjqiProof.initialized());
+  stack_ = &cx->noExecuteDebuggerTop.ref();
+  prev_ = *stack_;
+  *stack_ = this;
+}
+
+#ifdef DEBUG
+/* static */
+bool EnterDebuggeeNoExecute::isLockedInStack(JSContext* cx, Debugger& dbg) {
+  for (EnterDebuggeeNoExecute* it = cx->noExecuteDebuggerTop; it;
+       it = it->prev_) {
+    if (&it->debugger() == &dbg) {
+      return !it->unlocked_;
+    }
+  }
+  return false;
+}
+#endif
+
+/* static */
+EnterDebuggeeNoExecute* EnterDebuggeeNoExecute::findInStack(JSContext* cx) {
+  Realm* debuggee = cx->realm();
+  for (EnterDebuggeeNoExecute* it = cx->noExecuteDebuggerTop; it;
+       it = it->prev_) {
+    Debugger& dbg = it->debugger();
+    if (!it->unlocked_ && dbg.observesGlobal(debuggee->maybeGlobal())) {
+      return it;
+    }
+  }
+  return nullptr;
+}
+
+/* static */
+bool EnterDebuggeeNoExecute::reportIfFoundInStack(JSContext* cx,
+                                                  HandleScript script) {
+  if (EnterDebuggeeNoExecute* nx = findInStack(cx)) {
+    bool warning = !cx->options().throwOnDebuggeeWouldRun();
+    if (!warning || !nx->reported_) {
+      AutoRealm ar(cx, nx->debugger().toJSObject());
+      nx->reported_ = true;
+      if (cx->options().dumpStackOnDebuggeeWouldRun()) {
+        fprintf(stdout, "Dumping stack for DebuggeeWouldRun:\n");
+        DumpBacktrace(cx);
+      }
+      const char* filename = script->filename() ? script->filename() : "(none)";
+      char linenoStr[15];
+      SprintfLiteral(linenoStr, "%u", script->lineno());
+      if (warning) {
+        return WarnNumberUTF8(cx, JSMSG_DEBUGGEE_WOULD_RUN, filename,
+                              linenoStr);
+      }
+
+      JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
+                               JSMSG_DEBUGGEE_WOULD_RUN, filename, linenoStr);
+      return false;
+    }
+  }
+  return true;
+}