Android系统下打印函数调用栈信息（c++部分）

程序员文章站 2022-03-11 15:43:44

一般需要添加3部分1、依赖的库libutilscallstack.soAndroid.mk下添加LOCAL_SHARED_LIBRARIES := libdl libdisplaydebug libsdmutils libutilscallstack如果不添加对libutilscallstack.so的引用，出现以下错误hardware/qcom/display/sdm/libs/core/display_base.cpp:41:10: fatal error: 'uti......

一、需要添加3部分

1、依赖的库

libutilscallstack.so

Android.mk下添加LOCAL_SHARED_LIBRARIES := libdl libdisplaydebug libsdmutils libutilscallstack

如果不添加对libutilscallstack.so的引用，出现以下错误

hardware/qcom/display/sdm/libs/core/display_base.cpp:41:10: fatal error: 'utils/CallStack.h' file not found
#include <utils/CallStack.h>
         ^~~~~~~~~~~~~~~~~~~

或

ld.lld: error: undefined symbol: android::CallStack::CallStack()
>>> referenced by display_base.cpp:549 (hardware/qcom/display/sdm/libs/core/display_base.cpp:549)
>>>               out/target/product/trinket/obj/SHARED_LIBRARIES/libsdmcore_intermediates/display_base.o:(sdm::DisplayBase::SetDisplayState(sdm::DisplayState, bool, int*))

ld.lld: error: undefined symbol: android::CallStack::update(int, int)
>>> referenced by display_base.cpp:550 (hardware/qcom/display/sdm/libs/core/display_base.cpp:550)
>>>               out/target/product/trinket/obj/SHARED_LIBRARIES/libsdmcore_intermediates/display_base.o:(sdm::DisplayBase::SetDisplayState(sdm::DisplayState, bool, int*))

ld.lld: error: undefined symbol: android::CallStack::dump(int, int, char const*) const
>>> referenced by display_base.cpp:551 (hardware/qcom/display/sdm/libs/core/display_base.cpp:551)
>>>               out/target/product/trinket/obj/SHARED_LIBRARIES/libsdmcore_intermediates/display_base.o:(sdm::DisplayBase::SetDisplayState(sdm::DisplayState, bool, int*))

ld.lld: error: undefined symbol: android::CallStack::log(char const*, android_LogPriority, char const*) const
>>> referenced by display_base.cpp:552 (hardware/qcom/display/sdm/libs/core/display_base.cpp:552)
>>>               out/target/product/trinket/obj/SHARED_LIBRARIES/libsdmcore_intermediates/display_base.o:(sdm::DisplayBase::SetDisplayState(sdm::DisplayState, bool, int*))

ld.lld: error: undefined symbol: android::CallStack::~CallStack()
>>> referenced by display_base.cpp:658 (hardware/qcom/display/sdm/libs/core/display_base.cpp:658)
>>>               out/target/product/trinket/obj/SHARED_LIBRARIES/libsdmcore_intermediates/display_base.o:(sdm::DisplayBase::SetDisplayState(sdm::DisplayState, bool, int*))
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
14:33:25 ninja failed with: exit status 1

2、添加接口的头文件

#include <utils/CallStack.h>

如果不添加以上头文件，会出现以下错误

RED_LIBRARIES/libsdmcore_intermediates/display_base.o hardware/qcom/display/sdm/libs/core/display_base.cpp"
hardware/qcom/display/sdm/libs/core/display_base.cpp:549:3: error: use of undeclared identifier 'android'
  android::CallStack callstack;
  ^
hardware/qcom/display/sdm/libs/core/display_base.cpp:552:42: error: use of undeclared identifier 'ANDROID_LOG_DEBUG'
  callstack.log("callstack-tag-display", ANDROID_LOG_DEBUG, "  ");

3、调用的接口

android::CallStack callstack;
callstack.update();
callstack.dump(1);//打印到输出
callstack.log("callstack-tag-display", ANDROID_LOG_DEBUG, " ");//logcat输出

二、举例

1、在hardware/qcom/display/sdm/libs/core/display_base.cpp添加栈信息

对应patch

diff --git a/sdm/libs/core/Android.mk b/sdm/libs/core/Android.mk
index c934de06..43d09992 100644
--- a/sdm/libs/core/Android.mk
+++ b/sdm/libs/core/Android.mk
@@ -10,7 +10,7 @@ LOCAL_HEADER_LIBRARIES        := display_headers
 LOCAL_CFLAGS                  := -fno-operator-names -Wno-unused-parameter -DLOG_TAG=\"SDM\" \
                                  $(common_flags)
 LOCAL_HW_INTF_PATH_1          := fb
-LOCAL_SHARED_LIBRARIES        := libdl libdisplaydebug libsdmutils
+LOCAL_SHARED_LIBRARIES        := libdl libdisplaydebug libsdmutils libutilscallstack
 
 ifneq ($(TARGET_IS_HEADLESS), true)
     LOCAL_CFLAGS              += -isystem external/libdrm
diff --git a/sdm/libs/core/display_base.cpp b/sdm/libs/core/display_base.cpp
index f1b15c3e..ffc94af5 100755
--- a/sdm/libs/core/display_base.cpp
+++ b/sdm/libs/core/display_base.cpp
@@ -38,6 +38,7 @@
 
 #include "display_base.h"
 #include "hw_info_interface.h"
+#include <utils/CallStack.h>
 
 #define __CLASS__ "DisplayBase"
 
@@ -545,6 +546,11 @@ DisplayError DisplayBase::SetDisplayState(DisplayState state, bool teardown,
   DLOGI("Set state = %d, display %d-%d, teardown = %d", state, display_id_,
         display_type_, teardown);
 
+  android::CallStack callstack;
+  callstack.update();
+  callstack.dump(1);
+  callstack.log("callstack-tag-display", ANDROID_LOG_DEBUG, "  ");
+
   if (state == state_) {
     DLOGI("Same state transition is requested.");
     return kErrorNone;

2、编译 make libsdmcore （Android.mk文件中LOCAL_MODULE := libsdmcore）(所用编译工具链为vendor/qcom/proprietary/llvm-arm-toolchain-ship/10.0/bin/clang++)

3、替换库

adb root;adb disable-verity;adb reboot

adb root;adb remount

adb push ./trinket/vendor/lib64/libsdmcore.so vendor/lib64/; adb push ./trinket/vendor/lib/libsdmcore.so vendor/lib

4、重启设备adb reboot，重启后单击电源键，让手机从唤醒进入睡眠状态，程序就能走到栈调用的位置

以下为效果


12-21 00:31:05.474   723  3217 D callstack-tag-display:   #00 pc 0000000000036944  /vendor/lib64/libsdmcore.so (sdm::DisplayBase::SetDisplayState(sdm::DisplayState, bool, int*)+156)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #01 pc 00000000000414b4  /vendor/lib64/libsdmcore.so (sdm::DisplayBuiltIn::SetDisplayState(sdm::DisplayState, bool, int*)+152)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #02 pc 000000000004082c  /vendor/lib64/hw/hwcomposer.trinket.so (sdm::HWCDisplay::SetPowerMode(HWC2::PowerMode, bool)+488)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #03 pc 000000000004a48c  /vendor/lib64/hw/hwcomposer.trinket.so (sdm::HWCDisplayBuiltIn::SetPowerMode(HWC2::PowerMode, bool)+96)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #04 pc 000000000002cb08  /vendor/lib64/hw/hwcomposer.trinket.so (int sdm::HWCSession::CallDisplayFunction<HWC2::PowerMode, bool>(hwc2_device*, unsigned long, HWC2::Error (sdm::HWCDisplay::*)(HWC2::PowerMode, bool), HWC2::PowerMode, bool)+248)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #05 pc 000000000002c82c  /vendor/lib64/hw/hwcomposer.trinket.so (sdm::HWCSession::SetPowerMode(hwc2_device*, unsigned long, int)+480)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #06 pc 00000000000139ac  /vendor/bin/hw/android.hardware.graphics.composer@2.4-service (android::hardware::graphics::composer::V2_2::hal::detail::ComposerClientImpl<android::hardware::graphics::composer::V2_3::IComposerClient, android::hardware::graphics::composer::V2_3::hal::ComposerHal>::setPowerMode_2_2(unsigned long, android::hardware::graphics::composer::V2_2::IComposerClient::PowerMode)+28)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #07 pc 0000000000026df0  /apex/com.android.vndk.v30/lib64/android.hardware.graphics.composer@2.2.so (android::hardware::graphics::composer::V2_2::BnHwComposerClient::_hidl_setPowerMode_2_2(android::hidl::base::V1_0::BnHwBase*, android::hardware::Parcel const&, android::hardware::Parcel*, std::__1::function<void (android::hardware::Parcel&)>)+208)
12-21 00:31:05.474   723  3217 D callstack-tag-display:   #08 pc 00000000000422c8  /apex/com.android.vndk.v30/lib64/android.hardware.graphics.composer@2.4.so (android::hardware::graphics::composer::V2_4::BnHwComposerClient::onTransact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+2272)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #09 pc 00000000000941d8  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::BHwBinder::transact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+68)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #10 pc 0000000000098170  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::getAndExecuteCommand()+1076)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #11 pc 00000000000993b8  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::joinThreadPool(bool)+96)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #12 pc 00000000000a845c  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::PoolThread::threadLoop()+24)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #13 pc 00000000000154cc  /apex/com.android.vndk.v30/lib64/libutils.so (android::Thread::_threadLoop(void*)+260)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #14 pc 0000000000014d90  /apex/com.android.vndk.v30/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #15 pc 00000000000b0048  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64)
12-21 00:31:05.475   723  3217 D callstack-tag-display:   #16 pc 00000000000503c8  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64)
12-21 00:31:05.475     0     0 I         : [<0>][3217, HwBinder:723_3][drm:sde_connector_atomic_set_property:1160] sde connector set power mode = SDE_MODE_DPMS_OFF

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