Bug 1512437 - Part 2: Convert breakpoint APIs to be synchronous now that there are no sourcemaps. r=jlast

Differential Revision: https://phabricator.services.mozilla.com/D14628

--HG--
extra : moz-landing-system : lando

devtools/server/actors/source.js

@@ -470,21 +470,14 @@ const SourceActor = ActorClassWithSpec(sourceSpec, {
    *          A promise that resolves to a JSON object representing the
    *          response.
    */
-  setBreakpoint: function(line, column, condition, noSliding, inNestedLoop) {
-    if (!inNestedLoop && this.threadActor.state !== "paused") {
-      const errorObject = {
-        error: "wrongState",
-        message: "Cannot set breakpoint while debuggee is running.",
-      };
-      throw errorObject;
-    }
-
+  setBreakpoint: function(line, column, condition, noSliding) {
     const location = new OriginalLocation(this, line, column);
-    return this._getOrCreateBreakpointActor(
+    const actor = this._getOrCreateBreakpointActor(
       location,
       condition,
       noSliding
-    ).then((actor) => {
+    );
+
     const response = {
       actor: actor.actorID,
       isPending: actor.isPending,
@@ -496,7 +489,6 @@ const SourceActor = ActorClassWithSpec(sourceSpec, {
     }
 
     return response;
-    });
   },
 
   /**
@@ -591,7 +583,7 @@ const SourceActor = ActorClassWithSpec(sourceSpec, {
       // GCed as well, and no scripts will exist on those lines
       // anymore. We will never slide through a GCed script.
       if (originalLocation.originalColumn || scripts.length === 0) {
-        return Promise.resolve(actor);
+        return actor;
       }
 
       // Find the script that spans the largest amount of code to
@@ -617,13 +609,14 @@ const SourceActor = ActorClassWithSpec(sourceSpec, {
       // which means there must be valid entry points somewhere
       // within those scripts.
       if (actualLine > maxLine) {
-        return Promise.reject({
+        // eslint-disable-next-line no-throw-literal
+        throw {
           error: "noCodeAtLineColumn",
           message:
             "Could not find any entry points to set a breakpoint on, " +
             "even though I was told a script existed on the line I started " +
             "the search with.",
-        });
+        };
       }
 
       // Update the actor to use the new location (reusing a
@@ -640,7 +633,7 @@ const SourceActor = ActorClassWithSpec(sourceSpec, {
       }
     }
 
-    return Promise.resolve(actor);
+    return actor;
   },
 
   _setBreakpointAtAllGeneratedLocations: function(actor, generatedLocations) {

devtools/server/actors/thread.js

@@ -487,19 +487,19 @@ const ThreadActor = ActorClassWithSpec(threadSpec, {
         line: generatedLine,
         column: generatedColumn,
       };
+      const pkt = onPacket(packet);
 
-      Promise.resolve(onPacket(packet))
-        .catch(error => {
+      this.conn.send(pkt);
+    } catch (error) {
       reportError(error);
-          return {
+      this.conn.send({
         error: "unknownError",
         message: error.message + "\n" + error.stack,
-          };
-        })
-        .then(pkt => {
-          this.conn.send(pkt);
       });
+      return undefined;
+    }
 
+    try {
       this._pushThreadPause();
     } catch (e) {
       reportError(e, "Got an exception during TA__pauseAndRespond: ");
@@ -1240,10 +1240,10 @@ const ThreadActor = ActorClassWithSpec(threadSpec, {
     return res ? res : {};
   },
 
-  onSources: async function(request) {
-    await Promise.all(this.dbg.findSources().map(source => {
+  onSources: function(request) {
+    for (const source of this.dbg.findSources()) {
       this.sources.createSourceActor(source);
-    }));
+    }
 
     // No need to flush the new source packets here, as we are sending the
     // list of sources out immediately and we don't need to invoke the
@@ -1963,9 +1963,7 @@ const ThreadActor = ActorClassWithSpec(threadSpec, {
     }
 
     if (this._onLoadBreakpointURLs.has(source.url)) {
-      this.unsafeSynchronize(
-        sourceActor.setBreakpoint(1, undefined, undefined, undefined, true)
-      );
+      sourceActor.setBreakpoint(1);
     }
 
     this._debuggerSourcesSeen.add(source);