Bug 1002797 - Cancel off-thread Ion compilation when doing debug mode OSR. (r=jandem)

js/src/jit-test/tests/debug/bug1002797.js

@@ -0,0 +1,15 @@
+var lfcode = new Array();
+lfcode.push("");
+lfcode.push("0");
+lfcode.push("newGlobal(\"1\").eval(\"(new Debugger).addAllGlobalsAsDebuggees();\");\n");
+while (true) {
+    var file = lfcode.shift(); if (file == undefined) { break; }
+    loadFile(file)
+}
+function loadFile(lfVarx) {
+    try {
+      if (lfVarx.substr(-3) != ".js" && lfVarx.length != 1) {
+        evaluate(lfVarx); 
+      } else if (!isNaN(lfVarx)) {}
+    } catch (lfVare) {    }
+}

js/src/jit/BaselineDebugModeOSR.cpp

@@ -413,6 +413,8 @@ RecompileBaselineScriptForDebugMode(JSContext *cx, JSScript *script)
     IonSpew(IonSpew_BaselineDebugModeOSR, "Recompiling (%s:%d) for debug mode %s",
             script->filename(), script->lineno(), expectedDebugMode ? "ON" : "OFF");
 
+    CancelOffThreadIonCompile(cx->compartment(), script);
+
     if (script->hasIonScript())
         Invalidate(cx, script, /* resetUses = */ false);