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Android15跟踪函数调用关系

news 2025/11/4 9:27:35

注：这里介绍Android15 Camera系统调试用到的跟踪函数调用关系的一些方法。

使用CallStack类dump调用栈

例如，跟踪Camera3OutputStream对象的创建。

1.dump调用栈

步骤1.Camera3OutputStream.h/.cpp中通过CallStack类打印调用信息.

//frameworks/av/services/camera/libcameraservice/device3/Camera3OutputStream.h
//添加dumpCallStack()接口，封装CallStack调用
class Camera3OutputStream :public Camera3IOStreamBase,public Camera3OutputStreamInterface {...static void dumpCallStack(const char* prefix);
};
//frameworks/av/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
//添加dumpCallStack()接口实现
#include "utils/CallStack.h"
void Camera3OutputStream::dumpCallStack(const char* prefix)
{android::CallStack stack(prefix);stack.update();//stack.log("CAMERA_CALLSTACK");
}

步骤2.Camera3OutputStream需要的位置添加dumpCallStack()调用

//frameworks/av/services/camera/libcameraservice/device3/Camera3OutputStream.cpp
Camera3OutputStream::Camera3OutputStream(int id,sp<Surface> consumer,uint32_t width, uint32_t height, int format,android_dataspace dataSpace, camera_stream_rotation_t rotation,nsecs_t timestampOffset, const std::string& physicalCameraId,const std::unordered_set<int32_t> &sensorPixelModeUsed, IPCTransport transport,int setId, bool isMultiResolution, int64_t dynamicRangeProfile,int64_t streamUseCase, bool deviceTimeBaseIsRealtime, int timestampBase,int mirrorMode, int32_t colorSpace, bool useReadoutTimestamp) :Camera3IOStreamBase(id, CAMERA_STREAM_OUTPUT, width, height,/*maxSize*/0, format, dataSpace, rotation,physicalCameraId, sensorPixelModesUsec, setId, isMultiResolution,dynamicRangeProfile, streamUseCase, deviceTimeBaseRealtime,timestampBase, colorSpace),mConsumer(consumer),mTransform(0),... {dumpCallStack("Camera3OutputStream::Camera3OutputStream1");...
}

步骤3.编译并更新cameraserver到设备

步骤4.重启系统

步骤5.操作相机