Deliver gdb and inferior error messages to the client

Fixes eclipse-cdt-cloud#239

src/GDBBackend.ts

@@ -85,6 +85,12 @@ export class GDBBackend extends events.EventEmitter {
         this.out = this.proc.stdin;
         this.hardwareBreakpoint = requestArgs.hardwareBreakpoint ? true : false;
         await this.parser.parse(this.proc.stdout);
+        if (this.proc.stderr) {
+            this.proc.stderr.on('data', (chunk) => {
+                const newChunk = chunk.toString();
+                this.emit('consoleStreamOutput', newChunk, 'stderr');
+            });
+        }
         await this.setNonStopMode(requestArgs.gdbNonStop);
         await this.setAsyncMode(requestArgs.gdbAsync);
     }

src/integration-tests/stderr.spec.ts

@@ -0,0 +1,63 @@
+/*********************************************************************
+ * Copyright (c) 2023 Kichwa Coders Canada Inc.
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *********************************************************************/
+
+import * as path from 'path';
+import { LaunchRequestArguments } from '../GDBDebugSession';
+import { CdtDebugClient } from './debugClient';
+import {
+    fillDefaults,
+    getScopes,
+    isRemoteTest,
+    standardBeforeEach,
+    testProgramsDir,
+} from './utils';
+
+describe('stderr', function () {
+    let dc: CdtDebugClient;
+    const program = path.join(testProgramsDir, 'stderr');
+    const source = path.join(testProgramsDir, 'stderr.c');
+
+    beforeEach(async function () {
+        dc = await standardBeforeEach();
+    });
+
+    afterEach(async function () {
+        await dc.stop();
+    });
+
+    it('receives stderr from inferior as output events', async function () {
+        if (isRemoteTest) {
+            // remote tests the inferior stdout/err comes out the remote end, so
+            // no output events from the adapter
+            this.skip();
+        }
+
+        await dc.hitBreakpoint(
+            fillDefaults(this.test, {
+                program: program,
+            } as LaunchRequestArguments),
+            {
+                path: source,
+                line: 6,
+            }
+        );
+
+        const stderr = dc.waitForOutputEvent(
+            'stderr',
+            'STDERR Here I am STDERR\r\n'
+        );
+
+        const scope = await getScopes(dc);
+        await Promise.all([
+            dc.continueRequest({ threadId: scope.thread.id }),
+            stderr,
+        ]);
+    });
+});

src/integration-tests/test-programs/.gitignore

@@ -18,3 +18,4 @@ MultiThreadRunControl
 .settings/
 /vars_cpp
 /log
+stderr

src/integration-tests/test-programs/Makefile

@@ -1,4 +1,4 @@
-BINS = empty empty\ space evaluate vars vars_cpp mem segv count disassemble functions loopforever MultiThread MultiThreadRunControl
+BINS = empty empty\ space evaluate vars vars_cpp mem segv count disassemble functions loopforever MultiThread MultiThreadRunControl stderr
 
 .PHONY: all
 all: $(BINS)
@@ -56,6 +56,9 @@ MultiThread: MultiThread.o
 MultiThreadRunControl: MultiThreadRunControl.o
 	$(LINK_CXX)
 
+stderr: stderr.o
+	$(LINK)
+
 %.o: %.c
 	$(CC) -c $< -g3 -O0
 

src/integration-tests/test-programs/stderr.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include "Sleep.h"
+int main()
+{
+    // Always use \r\n so that Windows doesn't reinterpret
+    fprintf(stderr, "STDERR Here I am STDERR\r\n");
+    fflush(stderr);
+
+    // Sleep for a while so that there is no other
+    // noise, such as process termination, while
+    // looking for above output
+    SLEEP(2);
+    return 0;
+}