ci: enable gcov example for all chips

examples/system/.build-test-rules.yml

@@ -80,9 +80,12 @@ examples/system/freertos:
 
 examples/system/gcov:
   disable_test:
-    - if: IDF_TARGET != "esp32"
+    - if: IDF_TARGET == "esp32p4"
       temporary: true
       reason: lack of runners
+    - if: IDF_TARGET == "esp32s3"
+      temporary: true
+      reason: unstable, known data corruption issue #TODO: OCD-1048
 
 examples/system/gdbstub:
   disable:

examples/system/gcov/CMakeLists.txt

@@ -2,6 +2,9 @@
 # in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.16)
 
+# keep this string to detect as project file in CI:
+#include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
 file(TO_NATIVE_PATH "$ENV{IDF_PATH}/tools/cmake/project.cmake" _project_path)
 
 include(${_project_path})

examples/system/gcov/main/gcov_example_main.c

@@ -12,17 +12,22 @@
 #include "driver/gpio.h"
 #include "esp_app_trace.h"
 #include "sdkconfig.h"
+#include "esp_log.h"
 
 /* Can use project configuration menu (idf.py menuconfig) to choose the GPIO
    to blink, or you can edit the following line and set a number here.
 */
 #define BLINK_GPIO CONFIG_BLINK_GPIO
 
+static const char *TAG = "example";
+
 void blink_dummy_func(void);
 void some_dummy_func(void);
 
 static void blink_task(void *pvParameter)
 {
+    ESP_LOGI(TAG, "Ready for OpenOCD connection");
+
     // The first two iterations GCOV data are dumped using call to esp_gcov_dump() and OOCD's "esp32 gcov dump" command.
     // After that they can be dumped using OOCD's "esp32 gcov" command only.
     int dump_gcov_after = -2;

examples/system/gcov/pytest_gcov.py

@@ -1,28 +1,128 @@
 # SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Unlicense OR CC0-1.0
+import json
+import logging
 import os.path
+import signal
 import time
+from telnetlib import Telnet
+from typing import Any
+from typing import Optional
 
+import pexpect
 import pytest
+from pytest_embedded.utils import to_bytes
+from pytest_embedded.utils import to_str
 from pytest_embedded_idf import IdfDut
-from pytest_embedded_jtag import OpenOcd
+
+MAX_RETRIES = 3
+RETRY_DELAY = 1
+TELNET_PORT = 4444
 
 
-@pytest.mark.esp32
-@pytest.mark.jtag
-@pytest.mark.parametrize(
-    'embedded_services, no_gdb',
-    [
-        ('esp,idf,jtag', 'y'),
-    ],
-    indirect=True,
-)
-def test_gcov(dut: IdfDut, openocd: OpenOcd) -> None:
+class OpenOCD:
+    def __init__(self, dut: 'IdfDut'):
+        self.dut = dut
+        self.telnet: Optional[Telnet] = None
+        self.log_file = os.path.join(self.dut.logdir, 'ocd.txt')
+        self.proc: Optional[pexpect.spawn] = None
+
+    def run(self) -> Optional['OpenOCD']:
+        desc_path = os.path.join(self.dut.app.binary_path, 'project_description.json')
+
+        try:
+            with open(desc_path, 'r') as f:
+                project_desc = json.load(f)
+        except FileNotFoundError:
+            logging.error('Project description file not found at %s', desc_path)
+            return None
+
+        openocd_scripts = os.getenv('OPENOCD_SCRIPTS')
+        if not openocd_scripts:
+            logging.error('OPENOCD_SCRIPTS environment variable is not set.')
+            return None
+
+        debug_args = project_desc.get('debug_arguments_openocd')
+        if not debug_args:
+            logging.error("'debug_arguments_openocd' key is missing in project_description.json")
+            return None
+
+        # For debug purposes, make the value '4'
+        ocd_env = os.environ.copy()
+        ocd_env['LIBUSB_DEBUG'] = '1'
+
+        for _ in range(1, MAX_RETRIES + 1):
+            try:
+                self.proc = pexpect.spawn(
+                    command='openocd',
+                    args=['-s', openocd_scripts] + debug_args.split(),
+                    timeout=5,
+                    encoding='utf-8',
+                    codec_errors='ignore',
+                    env=ocd_env,
+                )
+                if self.proc and self.proc.isalive():
+                    self.proc.expect_exact('Info : Listening on port 3333 for gdb connections', timeout=5)
+                    return self
+            except (pexpect.exceptions.EOF, pexpect.exceptions.TIMEOUT) as e:
+                logging.error('Error running OpenOCD: %s', str(e))
+                if self.proc and self.proc.isalive():
+                    self.proc.terminate()
+            time.sleep(RETRY_DELAY)
+
+        logging.error('Failed to run OpenOCD after %d attempts.', MAX_RETRIES)
+        return None
+
+    def connect_telnet(self) -> None:
+        for attempt in range(1, MAX_RETRIES + 1):
+            try:
+                self.telnet = Telnet('127.0.0.1', TELNET_PORT, 5)
+                break
+            except ConnectionRefusedError as e:
+                logging.error('Error telnet connection: %s in attempt:%d', e, attempt)
+                time.sleep(1)
+        else:
+            raise ConnectionRefusedError
+
+    def write(self, s: str) -> Any:
+        if self.telnet is None:
+            logging.error('Telnet connection is not established.')
+            return ''
+        resp = self.telnet.read_very_eager()
+        self.telnet.write(to_bytes(s, '\n'))
+        resp += self.telnet.read_until(b'>')
+        return to_str(resp)
+
+    def apptrace_wait_stop(self, timeout: int = 30) -> None:
+        stopped = False
+        end_before = time.time() + timeout
+        while not stopped:
+            cmd_out = self.write('esp apptrace status')
+            for line in cmd_out.splitlines():
+                if line.startswith('Tracing is STOPPED.'):
+                    stopped = True
+                    break
+            if not stopped and time.time() > end_before:
+                raise pexpect.TIMEOUT('Failed to wait for apptrace stop!')
+            time.sleep(1)
+
+    def kill(self) -> None:
+        # Check if the process is still running
+        if self.proc and self.proc.isalive():
+            self.proc.terminate()
+            self.proc.kill(signal.SIGKILL)
+
+
+def _test_gcov(dut: IdfDut) -> None:
     # create the generated .gcda folder, otherwise would have error: failed to open file.
     # normally this folder would be created via `idf.py build`. but in CI the non-related files would not be preserved
     os.makedirs(os.path.join(dut.app.binary_path, 'esp-idf', 'main', 'CMakeFiles', '__idf_main.dir'), exist_ok=True)
     os.makedirs(os.path.join(dut.app.binary_path, 'esp-idf', 'sample', 'CMakeFiles', '__idf_sample.dir'), exist_ok=True)
 
+    dut.expect_exact('example: Ready for OpenOCD connection', timeout=5)
+    openocd = OpenOCD(dut).run()
+    assert openocd
+
     def expect_counter_output(loop: int, timeout: int = 10) -> None:
         dut.expect_exact(
             [f'blink_dummy_func: Counter = {loop}', f'some_dummy_func: Counter = {loop * 2}'],
@@ -30,9 +130,6 @@ def test_gcov(dut: IdfDut, openocd: OpenOcd) -> None:
             timeout=timeout,
         )
 
-    expect_counter_output(0)
-    dut.expect('Ready to dump GCOV data...', timeout=5)
-
     def dump_coverage(cmd: str) -> None:
         response = openocd.write(cmd)
 
@@ -55,18 +152,45 @@ def test_gcov(dut: IdfDut, openocd: OpenOcd) -> None:
 
         assert len(expect_lines) == 0
 
-    # Test two hard-coded dumps
-    dump_coverage('esp gcov dump')
-    dut.expect('GCOV data have been dumped.', timeout=5)
-    expect_counter_output(1)
-    dut.expect('Ready to dump GCOV data...', timeout=5)
-    dump_coverage('esp gcov dump')
-    dut.expect('GCOV data have been dumped.', timeout=5)
+    try:
+        openocd.connect_telnet()
+        openocd.write('log_output {}'.format(openocd.log_file))
+        openocd.write('reset run')
+        dut.expect_exact('example: Ready for OpenOCD connection', timeout=5)
 
-    for i in range(2, 6):
-        expect_counter_output(i)
+        expect_counter_output(0)
+        dut.expect('Ready to dump GCOV data...', timeout=5)
 
-    for _ in range(3):
-        time.sleep(1)
-        # Test instant run-time dump
-        dump_coverage('esp gcov')
+        # Test two hard-coded dumps
+        dump_coverage('esp gcov dump')
+        dut.expect('GCOV data have been dumped.', timeout=5)
+        expect_counter_output(1)
+        dut.expect('Ready to dump GCOV data...', timeout=5)
+        dump_coverage('esp gcov dump')
+        dut.expect('GCOV data have been dumped.', timeout=5)
+
+        for i in range(2, 6):
+            expect_counter_output(i)
+
+        for _ in range(3):
+            time.sleep(1)
+            # Test instant run-time dump
+            dump_coverage('esp gcov')
+    finally:
+        openocd.kill()
+
+
+@pytest.mark.jtag
+@pytest.mark.esp32
+@pytest.mark.esp32c2
+@pytest.mark.esp32s2
+def test_gcov(dut: IdfDut) -> None:
+    _test_gcov(dut)
+
+
+@pytest.mark.esp32c3
+@pytest.mark.esp32c6
+@pytest.mark.esp32h2
+@pytest.mark.usb_serial_jtag
+def test_gcov_usj(dut: IdfDut) -> None:
+    _test_gcov(dut)

examples/system/gcov/sdkconfig.ci

@@ -1 +0,0 @@
-CONFIG_FREERTOS_UNICORE=y