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Android fstrace

Android下如何使用ftrace

参考文档

wpa_supplicant log信息

  • MTK基线下的wpa_cli开启
    • /vendor/etc/wifi/wpa_supplicant.conf
      • ctrl_interface=/data/vendor/wifi/wpa/sockets
        • wpa_cli -i wlan0
          • scan_results
  • [RK3288][Android6.0] WiFi的配置文件wpa_supplicant.conf
    • vendor/mediatek/proprietary/hardware/connectivity/wlan/config/Android.mk
      • vendor/mediatek/proprietary/hardware/connectivity/wlan/mtk-wpa_supplicant.conf
        • ctrl_interface=/data/vendor/wifi/wpa/sockets
      • diff 
        diff --git a/vendor/mediatek/proprietary/hardware/connectivity/wlan/config/mtk-wpa_supplicant.conf b/vendor/mediatek/proprietary/hardware/connectivity/wlan/config/mtk-wpa_supplicant.conf
index 6ce4777f012..a258abab8f7 100644
--- a/vendor/mediatek/proprietary/hardware/connectivity/wlan/config/mtk-wpa_supplicant.conf
+++ b/vendor/mediatek/proprietary/hardware/connectivity/wlan/config/mtk-wpa_supplicant.conf
@@ -1,4 +1,4 @@
-ctrl_interface=wlan0
+ctrl_interface=/data/vendor/wifi/wpa/sockets
 update_config=1
 manufacturer=MediaTek Inc.
 device_name=Wireless Client
  • 设置debug等级查看信息：
    • adb shell
      • wpa_cli -i wlan0
        • log_level debug
      • logcat | grep wpa
  • logcat | grep wpa_supplicant 
    08-06 07:07:22.448  2892  2892 I wpa_supplicant: Processing hidl events on FD 3
08-06 07:07:22.481  2892  2892 I wpa_supplicant: Successfully initialized wpa_supplicant
08-06 07:07:22.761  2892  2892 I wpa_supplicant: Copied template conf file from /vendor/etc/wifi/wpa_supplicant.conf to /data/vendor/wifi/wpa/wpa_supplicant.conf
08-06 07:07:22.798  2892  2892 I wpa_supplicant: rfkill: Cannot open RFKILL control device
08-06 07:07:22.820  2892  2892 I wpa_supplicant: WPS: Converting display to virtual_display for WPS 2.0 compliance
08-06 07:07:22.820  2892  2892 I wpa_supplicant: WPS: Converting push_button to virtual_push_button for WPS 2.0 compliance
08-06 07:07:22.834  2892  2892 E wpa_supplicant: global ctrl interface @android:wpa_wlan0 matches ctrl interface wlan0 - do not open per-interface ctrl interface
08-06 07:07:22.835  2892  2892 E wpa_supplicant: [WAPI] wapi_init dlopen failed in libwapi.so: dlopen failed: library "libwapi.so" not found
08-06 07:07:22.836  2892  2892 E wpa_supplicant: wapi_init failed!
08-06 07:07:23.059  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd MACADDR
08-06 07:07:23.103  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd BTCOEXSCAN-STOP
08-06 07:07:23.113  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd RXFILTER-STOP
08-06 07:07:23.117  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd RXFILTER-ADD 2
08-06 07:07:23.130  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd RXFILTER-START
08-06 07:07:23.137  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd RXFILTER-STOP
08-06 07:07:23.143  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd RXFILTER-ADD 3
08-06 07:07:23.147  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd RXFILTER-START
08-06 07:07:23.152  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 0
08-06 07:07:23.152  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:07:23.231  2892  2892 I wpa_supplicant: Copied template conf file from /vendor/etc/wifi/wpa_supplicant.conf to /data/vendor/wifi/wpa/p2p_supplicant.conf
08-06 07:07:23.259  2892  2892 I wpa_supplicant: rfkill: Cannot open RFKILL control device
08-06 07:07:23.278  2892  2892 I wpa_supplicant: WPS: Converting display to virtual_display for WPS 2.0 compliance
08-06 07:07:23.278  2892  2892 I wpa_supplicant: WPS: Converting push_button to virtual_push_button for WPS 2.0 compliance
08-06 07:07:23.279  2892  2892 E wpa_supplicant: global ctrl interface @android:wpa_wlan0 matches ctrl interface wlan0 - do not open per-interface ctrl interface
08-06 07:07:23.335  2892  2892 I wpa_supplicant: WPS: Converting display to virtual_display for WPS 2.0 compliance
08-06 07:07:23.335  2892  2892 I wpa_supplicant: WPS: Converting push_button to virtual_push_button for WPS 2.0 compliance
08-06 07:08:23.163  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 0
08-06 07:08:23.165  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:08:24.862  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 1
08-06 07:08:24.874  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:10:52.510  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 0
08-06 07:10:52.527  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:11:57.638  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 1
08-06 07:11:57.662  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:22:57.571  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 0
08-06 07:22:57.587  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:23:59.667  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 1
08-06 07:23:59.682  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:29:49.416  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: wlan0 recv cmd SETSUSPENDMODE 0
08-06 07:29:49.429  2892  2892 I wpa_supplicant: wpa_driver_nl80211_driver_cmd: ret = 0 used = 17 total = 512
08-06 07:29:57.271   947  1278 I WifiNative: wpa_supplicant died. Cleaning up internal state.
  • wpa_supplicant trace log 
    diff --git a/external/wpa_supplicant_8/wpa_supplicant/android.config b/external/wpa_supplicant_8/wpa_supplicant/android.config
index dfea34d6b16..04362eb81d4 100644
--- a/external/wpa_supplicant_8/wpa_supplicant/android.config
+++ b/external/wpa_supplicant_8/wpa_supplicant/android.config
@@ -390,7 +390,7 @@ CONFIG_IEEE80211R=y
 # to the Linux kernel tracing facility. This helps debug the entire stack by
 # making it easy to record everything happening from the driver up into the
 # same file, e.g., using trace-cmd.
-#CONFIG_DEBUG_LINUX_TRACING=y
+CONFIG_DEBUG_LINUX_TRACING=y

 # Add support for writing debug log to Android logcat instead of standard
 # output
diff --git a/external/wpa_supplicant_8/wpa_supplicant/main.c b/external/wpa_supplicant_8/wpa_supplicant/main.c
index 51a8a0298a9..c54e02d6d7f 100644
--- a/external/wpa_supplicant_8/wpa_supplicant/main.c
+++ b/external/wpa_supplicant_8/wpa_supplicant/main.c
@@ -339,6 +339,7 @@ int main(int argc, char *argv[])
        }

        exitcode = 0;
+       params.wpa_debug_tracing++;
        global = wpa_supplicant_init(&params);
        if (global == NULL) {
                wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");

trace-cmd

  • https://github.com/ZengjfOS/RaspberryPi/tree/trace-cmd-AndroidQ
  • record
    • trace-cmd record -e printk -o /data/trace.dat
    • trace-cmd record -e printk -P 6764 -o /data/trace.dat
  • ps -A | grep wpa_supplicant | awk -F ' *' '{print $2}'
    • trace-cmd record -e printk -P 6741 -o /data/trace.dat
    • trace-cmd record -e printk -P ps -A | grep wpa_supplicant | awk -F ' *' '{print $2}' -o /data/trace.dat
  • adb pull /data/trace.dat trace.dat
  • 注意使用kernelshark中的任务过滤器和图形过滤器来合理显示需要看的界面 kernelshark_filter_show.png