【1000个GDB技巧-008】-GDB如何设置类似shell变量方便后面程序访问？set $my_val=0x123

原创 已于 2023-08-11 08:51:18 修改 · 119 阅读 · 0 ·
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#GDB

于 2023-08-11 08:31:49 首次发布
本文详细讨论了在GDB调试中使用.gdbinit文件和VSCodelaunch.json的技巧，涉及变量设置、脚本管理及不同环境下的使用方法。

可以使用脚本的几个场景：

  1. 在gdb的命令行中
  2. .gdbinit文件中，gdb初始化使用
  3. xxx.gdb脚本中
  4. vscode的launch.json的configurations的cppdbg的setupCommands某一个启动命令的text中，类似.gdbinit（不需要加-exec）设置后在调试窗口可以任意取用

设置命令

set $my_val=0x123

使用命令

p $my_val

与shell的不同

shell设置变量不用加$

技巧

  • vscode的launch.json中定义，窗口使用，这样可以开闭修改
  • xxx.gdb脚本中定义其他脚本使用可以开闭
  • xxx.gdb脚本中定义，命令行使用（使用前需要 source xxx.gdb先初始化，类似shell的source）
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#include "ti_msp_dl_config.h" #include "tjc_usart_hmi.h" #include <stdio.h> #include <stdint.h> #include <stdbool.h> #include <string.h> // 添加memset头文件 #include <ti/driverlib/dl_uart.h> #include <ti/devices/msp/msp.h> #include <ti/driverlib/driverlib.h> #include <ti/driverlib/dl_common.h> // 红外协议时序宏 (单位：微秒) #define LEADER_HIGH 9000 // 引导码高电平9ms #define LEADER_LOW 4500 // 引导码低电平4.5ms #define BIT_HIGH 560 // 数据位高电平560μs #define BIT_ONE_LOW 1690 // 逻辑"1"低电平1690μs #define BIT_ZERO_LOW 560 // 逻辑"0"低电平560μs #define TOLERANCE 150 // 时序容差±150μs #define SYSTEM_CLOCK 32000000 //// 32MHz // 安全参数 #define MAX_RETRY 3 // 最大重试次数 #define LOCK_TIME 15000 // 锁定时间(ms) #define TIME_WINDOW 3000 // 时间容错窗口(±3000ms) // 淘晶驰屏定义 #define TJC_PAGE_MAIN 0 #define TJC_TEXT_STATUS "t0" #define TJC_TEXT_TIME "t1" #define TJC_BUTTON_RESET "b0" #define FRAME_LENGTH 7 #define CONFIG_UART_0_BAUDRATE 115200 // 必须与屏幕波特率一致 // 全局变量结构体 - 使用默认内存分配 typedef struct { volatile uint32_t delay_value; volatile uint8_t retry_count; volatile uint32_t last_fail_time; volatile uint32_t rtc_counter; volatile uint32_t now_time; volatile uint32_t display_last_time; // 显示相关变量 volatile uint32_t display_counter; } GlobalVars; volatile GlobalVars globals; // 使用普通全局变量 volatile uint32_t delay_times = 0; volatile uint8_t uart_data = 0; volatile uint32_t now_time = 0; /******************** 淘晶驰串口屏驱动 ********************/ void tjc_send_cmd(const char *cmd) { // 发送命令主体 const char *p = cmd; while(*p) { while(!DL_UART_isTXFIFOEmpty(UART_0_INST)); // 等待发送完成 DL_UART_transmitData(UART_0_INST, *p++); } // 发送TJC协议结束符(0xFF 0xFF 0xFF) for(uint8_t i = 0; i < 3; i++) { while(!DL_UART_isTXFIFOEmpty(UART_0_INST)); DL_UART_transmitData(UART_0_INST, 0xFF); } } void tjc_set_text(const char *obj_name, const char *text) { char cmd[128]; snprintf(cmd, sizeof(cmd), "%s.txt=\"%s\"", obj_name, text); tjc_send_cmd(cmd); } void tjc_change_page(uint8_t page_id) { char cmd[16]; snprintf(cmd, sizeof(cmd), "page %d", page_id); tjc_send_cmd(cmd); } void tjc_beep(uint16_t duration_ms) { char cmd[16]; snprintf(cmd, sizeof(cmd), "beep %u", duration_ms); tjc_send_cmd(cmd); } /******************** 系统基础功能 ********************/ void delay_us(uint32_t us) { globals.delay_value = us; while(globals.delay_value != 0); } void SysTick_Handler(void) { if(globals.delay_value > 0) globals.delay_value--; globals.rtc_counter++; // 简单的RTC计数器(每毫秒增加1) globals.now_time = globals.rtc_counter; // 更新全局时间 } uint32_t get_timestamp(void) { return globals.rtc_counter; } /******************** 红外解码功能（8位） ********************/ bool validate_dynamic_code(uint8_t rx_code) { uint32_t current_seed = get_timestamp(); for(int offset = -TIME_WINDOW; offset <= TIME_WINDOW; offset++) { uint32_t seed = current_seed + offset; uint32_t calc_code = (seed * 0x5DEECE66D) & 0xFFFFFFFF; // 比较低8位 if(rx_code == (calc_code & 0xFF)) return true; } return false; } uint8_t ir_receive_packet(void) { uint8_t data = 0; uint32_t start_time = 0; uint32_t duration = 0; // 1. 检测引导码 while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 1); // 等待高电平结束 start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 0); // 等待低电平结束 duration = get_timestamp() - start_time; // 检查引导码低电平部分是否符合要求（转换为毫秒） if(duration < (LEADER_HIGH/1000 - TOLERANCE/1000) || duration > (LEADER_HIGH/1000 + TOLERANCE/1000)) return 0xFF; // 2. 检测引导码高电平部分 start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 1); duration = get_timestamp() - start_time; if(duration < (LEADER_LOW/1000 - TOLERANCE/1000) || duration > (LEADER_LOW/1000 + TOLERANCE/1000)) return 0xFF; // 3. 接收8位数据 for(int i = 0; i < 8; i++) { start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 0); duration = get_timestamp() - start_time; // 检查数据位高电平部分 if(duration < (BIT_HIGH/1000 - TOLERANCE/1000) || duration > (BIT_HIGH/1000 + TOLERANCE/1000)) return 0xFF; start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 1); duration = get_timestamp() - start_time; // 判断逻辑位 if(duration >= (BIT_ONE_LOW/1000 - TOLERANCE/1000) && duration <= (BIT_ONE_LOW/1000 + TOLERANCE/1000)) { data |= (1 << (7 - i)); // 设置逻辑"1" } else if(duration >= (BIT_ZERO_LOW/1000 - TOLERANCE/1000) && duration <= (BIT_ZERO_LOW/1000 + TOLERANCE/1000)) { // 逻辑"0"不需要设置，默认为0 } else { return 0xFF; // 无效时序 } } return data; } /******************** 系统初始化 ********************/ void init_system(void) { // 初始化全局变量 memset((void*)&globals, 0, sizeof(GlobalVars)); // 添加SysTick初始化（1ms中断） DL_SYSTICK_config(32000); DL_SYSTICK_enableInterrupt(); // 添加这行 // 设置SysTick中断优先级 NVIC_SetPriority(SysTick_IRQn, 3); DL_GPIO_initDigitalInput(DL_GPIO_PIN_9); // 启用全局中断 __enable_irq(); // 初始化串口屏 // 增强版初始化序列 delay_us(1000000); // 等待1秒 // 软重启屏幕 tjc_send_cmd("rest"); delay_us(1500000); // 等待1.5秒 tjc_set_text(TJC_TEXT_STATUS, "等待红外信号"); tjc_set_text(TJC_TEXT_TIME, "系统启动完成"); } /******************** 主业务逻辑 ********************/ void security_fsm(void) { // 1. 检测锁定状态 if(globals.retry_count >= MAX_RETRY) { if(get_timestamp() - globals.last_fail_time < LOCK_TIME) { tjc_set_text(TJC_TEXT_STATUS, "锁定中，请稍候"); return; } globals.retry_count = 0; } // 2. 尝试接收数据包 uint8_t rx_code = ir_receive_packet(); if(rx_code == 0xFF) { tjc_set_text(TJC_TEXT_STATUS, "信号接收失败"); tjc_beep(200); return; } // 3. 动态解码验证 if(validate_dynamic_code(rx_code)) { tjc_set_text(TJC_TEXT_STATUS, "认证成功"); tjc_beep(100); delay_us(50000); // 50ms延迟 tjc_beep(100); globals.retry_count = 0; } else { char msg[30]; snprintf(msg, sizeof(msg), "失败(剩余%d次)", MAX_RETRY - globals.retry_count - 1); tjc_set_text(TJC_TEXT_STATUS, msg); tjc_beep(500); globals.retry_count++; globals.last_fail_time = get_timestamp(); } } // 搭配滴答定时器实现的精确ms延时 void delay_ms(unsigned int ms) { delay_times = ms; while (delay_times != 0) ; } /******************** 主函数 ********************/ int main(void) { SYSCFG_DL_init(); // 初始化系统 init_system(); // 清除中断标志 NVIC_ClearPendingIRQ(UART_0_INST_INT_IRQN); // 使能串口中断 NVIC_EnableIRQ(UART_0_INST_INT_IRQN); SYSCFG_DL_init(); // 初始化显示变量 globals.display_last_time = globals.now_time; globals.display_counter = 0; uint8_t recv; recv= ir_receive_packet(); while(1) { // 每秒更新显示 if(globals.now_time - globals.display_last_time >= 1000) { globals.display_last_time = globals.now_time; globals.display_counter++; char str[50]; snprintf(str, sizeof(str), "t1.txt=\"运行:%d秒\"", globals.display_counter); tjc_send_cmd(str); } // 红外信号检测 security_fsm(); // 低功耗等待 __WFI(); } } Memory map prevented reading 0x20208040这个问题怎么办
07-07
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volatile uint8_t retry_count; volatile uint32_t last_fail_time; volatile uint32_t rtc_counter; volatile uint32_t now_time; volatile uint32_t display_last_time; // 显示相关变量 volatile uint32_t display_counter; } GlobalVars; volatile GlobalVars globals; // 使用普通全局变量 volatile uint32_t delay_times = 0; volatile uint8_t uart_data = 0; volatile uint32_t now_time = 0; void create_mapping(void) { // 创建1MB的映射区域 create_section_mapping(VIRT_ADDR, PHYS_ADDR, MT_DEVICE | MT_RW | MT_SECURE); } /******************** 淘晶驰串口屏驱动 ********************/ void tjc_send_cmd(const char *cmd) { // 发送命令主体 const char *p = cmd; while(*p) { while(!DL_UART_isTXFIFOEmpty(UART_0_INST)); // 等待发送完成 DL_UART_transmitData(UART_0_INST, *p++); } // 发送TJC协议结束符(0xFF 0xFF 0xFF) for(uint8_t i = 0; i < 3; i++) { while(!DL_UART_isTXFIFOEmpty(UART_0_INST)); DL_UART_transmitData(UART_0_INST, 0xFF); } } void tjc_set_text(const char *obj_name, const char *text) { char cmd[128]; snprintf(cmd, sizeof(cmd), "%s.txt=\"%s\"", obj_name, text); tjc_send_cmd(cmd); } void tjc_change_page(uint8_t page_id) { char cmd[16]; snprintf(cmd, sizeof(cmd), "page %d", page_id); tjc_send_cmd(cmd); } void tjc_beep(uint16_t duration_ms) { char cmd[16]; snprintf(cmd, sizeof(cmd), "beep %u", duration_ms); tjc_send_cmd(cmd); } /******************** 系统基础功能 ********************/ void delay_us(uint32_t us) { globals.delay_value = us; while(globals.delay_value != 0); } void SysTick_Handler(void) { if(globals.delay_value > 0) globals.delay_value--; globals.rtc_counter++; // 简单的RTC计数器(每毫秒增加1) globals.now_time = globals.rtc_counter; // 更新全局时间 } uint32_t get_timestamp(void) { return globals.rtc_counter; } /******************** 红外解码功能（8位） ********************/ bool validate_dynamic_code(uint8_t rx_code) { uint32_t current_seed = get_timestamp(); for(int offset = -TIME_WINDOW; offset <= TIME_WINDOW; offset++) { uint32_t seed = current_seed + offset; uint32_t calc_code = (seed * 0x5DEECE66D) & 0xFFFFFFFF; // 比较低8位 if(rx_code == (calc_code & 0xFF)) return true; } return false; } uint8_t ir_receive_packet(void) { uint8_t data = 0; uint32_t start_time = 0; uint32_t duration = 0; // 1. 检测引导码 while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 1); // 等待高电平结束 start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 0); // 等待低电平结束 duration = get_timestamp() - start_time; // 检查引导码低电平部分是否符合要求（转换为毫秒） if(duration < (LEADER_HIGH/1000 - TOLERANCE/1000) || duration > (LEADER_HIGH/1000 + TOLERANCE/1000)) return 0xFF; // 2. 检测引导码高电平部分 start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 1); duration = get_timestamp() - start_time; if(duration < (LEADER_LOW/1000 - TOLERANCE/1000) || duration > (LEADER_LOW/1000 + TOLERANCE/1000)) return 0xFF; // 3. 接收8位数据 for(int i = 0; i < 8; i++) { start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 0); duration = get_timestamp() - start_time; // 检查数据位高电平部分 if(duration < (BIT_HIGH/1000 - TOLERANCE/1000) || duration > (BIT_HIGH/1000 + TOLERANCE/1000)) return 0xFF; start_time = get_timestamp(); while(DL_GPIO_readPins(GPIOA, DL_GPIO_PIN_9) == 1); duration = get_timestamp() - start_time; // 判断逻辑位 if(duration >= (BIT_ONE_LOW/1000 - TOLERANCE/1000) && duration <= (BIT_ONE_LOW/1000 + TOLERANCE/1000)) { data |= (1 << (7 - i)); // 设置逻辑"1" } else if(duration >= (BIT_ZERO_LOW/1000 - TOLERANCE/1000) && duration <= (BIT_ZERO_LOW/1000 + TOLERANCE/1000)) { // 逻辑"0"不需要设置，默认为0 } else { return 0xFF; // 无效时序 } } return data; } /******************** 系统初始化 ********************/ void init_system(void) { // 初始化全局变量 memset((void*)&globals, 0, sizeof(GlobalVars)); // 添加SysTick初始化（1ms中断） DL_SYSTICK_config(32000); DL_SYSTICK_enableInterrupt(); // 添加这行 // 设置SysTick中断优先级 NVIC_SetPriority(SysTick_IRQn, 3); DL_GPIO_initDigitalInput(DL_GPIO_PIN_9); // 启用全局中断 __enable_irq(); // 初始化串口屏 // 增强版初始化序列 delay_us(1000000); // 等待1秒 // 软重启屏幕 tjc_send_cmd("rest"); delay_us(1500000); // 等待1.5秒 tjc_set_text(TJC_TEXT_STATUS, "等待红外信号"); tjc_set_text(TJC_TEXT_TIME, "系统启动完成"); } /******************** 主业务逻辑 ********************/ void security_fsm(void) { // 1. 检测锁定状态 if(globals.retry_count >= MAX_RETRY) { if(get_timestamp() - globals.last_fail_time < LOCK_TIME) { tjc_set_text(TJC_TEXT_STATUS, "锁定中，请稍候"); return; } globals.retry_count = 0; } // 2. 尝试接收数据包 uint8_t rx_code = ir_receive_packet(); if(rx_code == 0xFF) { tjc_set_text(TJC_TEXT_STATUS, "信号接收失败"); tjc_beep(200); return; } // 3. 动态解码验证 if(validate_dynamic_code(rx_code)) { tjc_set_text(TJC_TEXT_STATUS, "认证成功"); tjc_beep(100); delay_us(50000); // 50ms延迟 tjc_beep(100); globals.retry_count = 0; } else { char msg[30]; snprintf(msg, sizeof(msg), "失败(剩余%d次)", MAX_RETRY - globals.retry_count - 1); tjc_set_text(TJC_TEXT_STATUS, msg); tjc_beep(500); globals.retry_count++; globals.last_fail_time = get_timestamp(); } } // 搭配滴答定时器实现的精确ms延时 void delay_ms(unsigned int ms) { delay_times = ms; while (delay_times != 0) ; } /******************** 主函数 ********************/ int main(void) { SYSCFG_DL_init(); // 初始化系统 init_system(); // 清除中断标志 NVIC_ClearPendingIRQ(UART_0_INST_INT_IRQN); // 使能串口中断 NVIC_EnableIRQ(UART_0_INST_INT_IRQN); SYSCFG_DL_init(); // 初始化显示变量 globals.display_last_time = globals.now_time; globals.display_counter = 0; uint8_t recv; recv= ir_receive_packet(); while(1) { // 每秒更新显示 if(globals.now_time - globals.display_last_time >= 1000) { globals.display_last_time = globals.now_time; globals.display_counter++; char str[50]; snprintf(str, sizeof(str), "t1.txt=\"运行:%d秒\"", globals.display_counter); tjc_send_cmd(str); } // 红外信号检测 security_fsm(); // 低功耗等待 __WFI(); } } 应该怎么改
07-07
我们正在解决两个主要问题：1. ARMv7内存映射配置错误；2.优化红外解码和淘晶驰串口屏通信。 首先，针对内存映射问题，用户提供的初始映射表将物理地址0x10200000映射到虚拟地址0x20200000，大小为1MB（SZ_1M）。...
基于下面代码，如果不能定义自己的surface id，能否获取waylandsink 自动生成的surface id，来完成下面程序（注意：GStreamer 1.20.7） #include <gst/gst.h> #include <gst/video/videooverlay.h> #include <locale.h> #include <stdio.h> #include <stdlib.h> #include <libgen.h> #include <unistd.h> #include <string.h> #include <sys/wait.h> #include <sys/stat.h> #include <sys/types.h> #include <fcntl.h> #include <sys/mman.h> #include <wayland-client.h> #include <wayland-util.h> #include <glib.h> #include <glib-object.h> #include <ilm/ivi-application-client-protocol.h> // -------------------------- wl_display 的 boxed 类型定义 -------------------------- static gpointer wl_display_boxed_copy(const gpointer src) { return (gpointer)src; // 仅传递指针引用 } static void wl_display_boxed_free(gpointer data) { // 空实现：由 Wayland 库管理释放 } GType wl_display_get_type(void) { static GType type = 0; if (G_UNLIKELY(type == 0)) { type = g_boxed_type_register_static( "WlDisplay", wl_display_boxed_copy, wl_display_boxed_free ); } return type; } #define WL_TYPE_DISPLAY (wl_display_get_type()) // GStreamer Wayland 上下文常量 #define GST_CONTEXT_TYPE_WAYLAND_DISPLAY "wayland-display" // -------------------------- 配置常量 -------------------------- #define LAYER_ID 300 #define SCREEN_ID 0 #define SCREEN_WIDTH 1920 #define SCREEN_HEIGHT 720 #define SURFACE_WAIT_US 1000000 #define RENDER_DELAY_US 500000 #define IVI_SURFACE_ID 2000100 #define IVI_WAYLAND_VERSION 4 #define DUMMY_BUFFER_SIZE 4 // -------------------------- 全局变量 -------------------------- static struct wl_display *wl_display = NULL; static struct wl_registry *wl_registry = NULL; static struct wl_compositor *wl_compositor = NULL; static struct wl_shm *wl_shm = NULL; static struct ivi_application *ivi_app = NULL; static struct ivi_surface *ivi_surface = NULL; static struct wl_surface *wayland_surface = NULL; static struct wl_buffer *dummy_buffer = NULL; static guint32 videosink_surface_id = 0; static gboolean layer_initialized = FALSE; // -------------------------- Wayland 注册回调 -------------------------- static void registry_handle_global(void *data, struct wl_registry *registry, uint32_t name, const char *interface, uint32_t version) { if (strcmp(interface, "wl_compositor") == 0) { if (version < IVI_WAYLAND_VERSION) { fprintf(stderr, "Warning: wl_compositor version %u < %u\n", version, IVI_WAYLAND_VERSION); } wl_compositor = wl_registry_bind(registry, name, &wl_compositor_interface, IVI_WAYLAND_VERSION); printf("Debug: Bound wl_compositor (name: %u)\n", name); } else if (strcmp(interface, "ivi_application") == 0) { ivi_app = wl_registry_bind(registry, name, &ivi_application_interface, 1); printf("Debug: Bound ivi_application (name: %u)\n", name); } else if (strcmp(interface, "wl_shm") == 0) { wl_shm = wl_registry_bind(registry, name, &wl_shm_interface, 1); printf("Debug: Bound wl_shm (name: %u)\n", name); } } static const struct wl_registry_listener registry_listener = { .global = registry_handle_global, }; // -------------------------- 创建 dummy buffer -------------------------- static struct wl_buffer* create_valid_dummy_buffer() { if (!wl_shm) { fprintf(stderr, "Error: wl_shm not bound (cannot create buffer)\n"); return NULL; } char shm_name[32]; snprintf(shm_name, sizeof(shm_name), "/wl_shm_dummy_%d", getpid()); int fd = shm_open(shm_name, O_CREAT | O_RDWR, 0600); if (fd < 0) { fprintf(stderr, "Error: shm_open failed (errno: %d)\n", errno); return NULL; } shm_unlink(shm_name); if (ftruncate(fd, DUMMY_BUFFER_SIZE) < 0) { fprintf(stderr, "Error: ftruncate failed (errno: %d)\n", errno); close(fd); return NULL; } void *data = mmap(NULL, DUMMY_BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); if (data == MAP_FAILED) { fprintf(stderr, "Error: mmap failed (errno: %d)\n", errno); close(fd); return NULL; } memset(data, 0, DUMMY_BUFFER_SIZE); struct wl_shm_pool *pool = wl_shm_create_pool(wl_shm, fd, DUMMY_BUFFER_SIZE); if (!pool) { fprintf(stderr, "Error: wl_shm_create_pool failed\n"); munmap(data, DUMMY_BUFFER_SIZE); close(fd); return NULL; } struct wl_buffer *buffer = wl_shm_pool_create_buffer( pool, 0, 1, 1, 4, WL_SHM_FORMAT_ARGB8888 ); wl_shm_pool_destroy(pool); munmap(data, DUMMY_BUFFER_SIZE); close(fd); if (!buffer) { fprintf(stderr, "Error: Failed to create wl_buffer\n"); return NULL; } printf("Debug: Created valid wl_buffer (ptr: %p)\n", buffer); return buffer; } // -------------------------- 路径拼接工具 -------------------------- char* safe_path_join(const char *dir, const char *file) { if (!dir || !file) return NULL; size_t dir_len = strlen(dir); size_t file_len = strlen(file); char *result = malloc(dir_len + file_len + 2); if (!result) return NULL; sprintf(result, "%s%s%s", dir, (dir_len > 0 && dir[dir_len-1] != '/') ? "/" : "", file); return result; } // -------------------------- 执行 LayerManager 命令 -------------------------- gboolean exec_layermanager_cmd(const char *cmd, const char *error_msg) { printf("Executing LayerManager command: %s\n", cmd); int ret = system(cmd); if (ret != 0) { fprintf(stderr, "Error: %s (return code: %d)\n", error_msg, WEXITSTATUS(ret)); return FALSE; } return TRUE; } // -------------------------- 检查 Surface 是否存在 -------------------------- gboolean check_surface_exist(guint32 surface_id) { char cmd[256]; char buf[1024] = {0}; FILE *fp = NULL; snprintf(cmd, sizeof(cmd), "LayerManagerControl get surfaces | grep 'Surface %u'", surface_id); fp = popen(cmd, "r"); if (!fp) { fprintf(stderr, "Error: Failed to check surface existence\n"); return FALSE; } gboolean exist = (fgets(buf, sizeof(buf), fp) != NULL); if (exist) { printf("Debug: IVI Surface %u confirmed\n", surface_id); } else { fprintf(stderr, "Debug: IVI Surface %u not found\n", surface_id); } pclose(fp); return exist; } // -------------------------- 配置图层和 Surface 绑定 -------------------------- gboolean setup_layer_and_surface(guint32 surface_id) { if (surface_id == 0) { fprintf(stderr, "Error: Invalid IVI Surface ID (0)\n"); return FALSE; } int retry = 3; while (retry-- > 0 && !check_surface_exist(surface_id)) { fprintf(stderr, "Retry: Waiting for IVI Surface %u (retry %d/3)...\n", surface_id, 3 - retry); usleep(SURFACE_WAIT_US / 3); } if (!check_surface_exist(surface_id)) { fprintf(stderr, "Error: IVI Surface %u does not exist\n", surface_id); return FALSE; } char cmd[512]; printf("Waiting %dms for IVI Surface stabilization...\n", SURFACE_WAIT_US / 1000); usleep(SURFACE_WAIT_US); snprintf(cmd, sizeof(cmd), "LayerManagerControl create layer %d %d %d", LAYER_ID, SCREEN_WIDTH, SCREEN_HEIGHT); if (!exec_layermanager_cmd(cmd, "Failed to create layer")) return FALSE; snprintf(cmd, sizeof(cmd), "LayerManagerControl add surface %u to layer %d", surface_id, LAYER_ID); if (!exec_layermanager_cmd(cmd, "Failed to bind IVI Surface to layer")) { snprintf(cmd, sizeof(cmd), "LayerManagerControl destroy layer %d", LAYER_ID); exec_layermanager_cmd(cmd, "Cleanup: Failed to destroy layer"); return FALSE; } snprintf(cmd, sizeof(cmd), "LayerManagerControl set layer %d destination region 0 0 %d %d", LAYER_ID, SCREEN_WIDTH, SCREEN_HEIGHT); if (!exec_layermanager_cmd(cmd, "Failed to set layer destination")) goto cleanup; snprintf(cmd, sizeof(cmd), "LayerManagerControl set surface %u destination region 0 0 %d %d", surface_id, SCREEN_WIDTH, SCREEN_HEIGHT); if (!exec_layermanager_cmd(cmd, "Failed to set IVI Surface destination")) goto cleanup; snprintf(cmd, sizeof(cmd), "LayerManagerControl set layer %d visibility 1", LAYER_ID); if (!exec_layermanager_cmd(cmd, "Failed to enable layer visibility")) goto cleanup; snprintf(cmd, sizeof(cmd), "LayerManagerControl set surface %u visibility 1", surface_id); if (!exec_layermanager_cmd(cmd, "Failed to enable IVI Surface visibility")) goto cleanup; printf("Waiting %dms for rendering pipeline init...\n", RENDER_DELAY_US / 1000); usleep(RENDER_DELAY_US); snprintf(cmd, sizeof(cmd), "LayerManagerControl set screen %d render order %d", SCREEN_ID, LAYER_ID); if (!exec_layermanager_cmd(cmd, "Failed to set render order")) goto cleanup; layer_initialized = TRUE; printf("Layer setup completed (IVI Surface ID: %u, Layer ID: %d)\n", surface_id, LAYER_ID); return TRUE; cleanup: snprintf(cmd, sizeof(cmd), "LayerManagerControl destroy layer %d", LAYER_ID); exec_layermanager_cmd(cmd, "Cleanup: Failed to destroy layer (ignored)"); return FALSE; } // -------------------------- 清理图层和 Surface -------------------------- void cleanup_layer_and_surface(void) { if (!layer_initialized || videosink_surface_id == 0) return; char cmd[512]; snprintf(cmd, sizeof(cmd), "LayerManagerControl set surface %u visibility 0", videosink_surface_id); exec_layermanager_cmd(cmd, "Cleanup: Failed to disable IVI Surface visibility (ignored)"); snprintf(cmd, sizeof(cmd), "LayerManagerControl destroy layer %d", LAYER_ID); exec_layermanager_cmd(cmd, "Cleanup: Failed to destroy layer (ignored)"); if (dummy_buffer) { wl_buffer_destroy(dummy_buffer); dummy_buffer = NULL; printf("Debug: Destroyed dummy buffer\n"); } if (ivi_surface) { ivi_surface_destroy(ivi_surface); ivi_surface = NULL; } if (wayland_surface) { wl_surface_destroy(wayland_surface); wayland_surface = NULL; } layer_initialized = FALSE; videosink_surface_id = 0; } // -------------------------- 检查 LayerManagerControl -------------------------- gboolean check_layermanager(void) { if (system("LayerManagerControl --help > /dev/null 2>&1") != 0) { fprintf(stderr, "Error: 'LayerManagerControl' not found\n"); return FALSE; } printf("LayerManagerControl tool validated\n"); return TRUE; } // -------------------------- 创建 IVI Surface -------------------------- gboolean create_ivi_valid_surface(void) { if (!wl_compositor || !ivi_app || !wl_shm) { fprintf(stderr, "Error: Missing required Wayland interfaces\n"); return FALSE; } wayland_surface = wl_compositor_create_surface(wl_compositor); if (!wayland_surface) { fprintf(stderr, "Error: Failed to create base wl_surface\n"); return FALSE; } printf("Debug: Created base wl_surface (ptr: %p)\n", wayland_surface); dummy_buffer = create_valid_dummy_buffer(); if (!dummy_buffer) { fprintf(stderr, "Error: Failed to create valid dummy buffer\n"); wl_surface_destroy(wayland_surface); wayland_surface = NULL; return FALSE; } wl_surface_attach(wayland_surface, dummy_buffer, 0, 0); printf("Debug: Attached valid wl_buffer to wl_surface (ptr: %p)\n", dummy_buffer); wl_surface_damage_buffer(wayland_surface, 0, 0, 1, 1); wl_surface_commit(wayland_surface); int roundtrip_result = wl_display_roundtrip(wl_display); if (roundtrip_result < 0) { fprintf(stderr, "Warning: wl_display_roundtrip failed after 1st commit\n"); } else { printf("Debug: 1st commit with valid buffer (compositor accepted)\n"); } ivi_surface = ivi_application_surface_create(ivi_app, IVI_SURFACE_ID, wayland_surface); if (!ivi_surface) { fprintf(stderr, "Error: Failed to create ivi_surface\n"); wl_surface_destroy(wayland_surface); wayland_surface = NULL; wl_buffer_destroy(dummy_buffer); dummy_buffer = NULL; return FALSE; } printf("Debug: Created ivi_surface with ID %u (ptr: %p)\n", IVI_SURFACE_ID, ivi_surface); videosink_surface_id = IVI_SURFACE_ID; printf("Debug: Fixed IVI Surface ID to %u\n", videosink_surface_id); wl_surface_commit(wayland_surface); wl_display_roundtrip(wl_display); printf("Debug: 2nd commit to confirm IVI association\n"); if (check_surface_exist(videosink_surface_id)) { printf("Debug: create_ivi_valid_surface completed successfully\n"); return TRUE; } else { return FALSE; } } // -------------------------- 向元素传递 Wayland 上下文（核心修复） -------------------------- static gboolean set_wayland_context_to_element(GstElement *element, struct wl_display *display) { if (!element || !display) { fprintf(stderr, "Error: Invalid element or display for GstContext\n"); return FALSE; } // 创建上下文 GstContext *context = gst_context_new(GST_CONTEXT_TYPE_WAYLAND_DISPLAY, TRUE); if (!context) { fprintf(stderr, "Error: Failed to create GstContext\n"); return FALSE; } // 设置上下文结构（display 字段） GstStructure *s = gst_context_writable_structure(context); gst_structure_set(s, "display", WL_TYPE_DISPLAY, display, NULL); // 直接向元素设置上下文（而非仅向 pipeline 设置） gst_element_set_context(element, context); printf("Debug: Set GstContext to element %s\n", GST_ELEMENT_NAME(element)); // 验证元素是否接收到上下文 GstContext *query_ctx = gst_element_get_context(element, GST_CONTEXT_TYPE_WAYLAND_DISPLAY); if (query_ctx) { const GstStructure *recv_struct = gst_context_get_structure(query_ctx); if (recv_struct) { const GValue *val = gst_structure_get_value(recv_struct, "display"); if (val && G_VALUE_HOLDS_BOXED(val)) { const struct wl_display *recv_display = g_value_get_boxed(val); if (recv_display == display) { printf("Debug: Element %s received display handle (verified)\n", GST_ELEMENT_NAME(element)); gst_context_unref(query_ctx); gst_context_unref(context); return TRUE; } } } gst_context_unref(query_ctx); } fprintf(stderr, "Warning: Element %s did not receive valid display handle\n", GST_ELEMENT_NAME(element)); gst_context_unref(context); return FALSE; } // -------------------------- 主函数 -------------------------- int main(int argc, char *argv[]) { GstElement *pipeline = NULL; GstElement *videosink = NULL; GstBus *bus = NULL; GstMessage *msg = NULL; GstStateChangeReturn ret; const char *video_path = NULL; char *abs_path = NULL; gchar *video_uri = NULL; int exit_code = EXIT_SUCCESS; setlocale(LC_ALL, "C"); gst_init(&argc, &argv); printf("GStreamer initialized: %s (SA8538 IVI-Shell compatible)\n", gst_version_string()); if (argc < 2) { fprintf(stderr, "Usage: %s <video_file_path>\n", argv[0]); return EXIT_FAILURE; } video_path = argv[1]; printf("Video to play: %s\n", video_path); if (!check_layermanager()) { return EXIT_FAILURE; } abs_path = realpath(video_path, NULL); if (!abs_path) { fprintf(stderr, "Error: Invalid video path\n"); return EXIT_FAILURE; } printf("Resolved absolute path: %s\n", abs_path); const char *xdg_runtime = getenv("XDG_RUNTIME_DIR"); const char *wayland_display = getenv("WAYLAND_DISPLAY"); if (!xdg_runtime || !wayland_display) { fprintf(stderr, "Error: Wayland env missing\n"); free(abs_path); return EXIT_FAILURE; } char *wayland_socket = safe_path_join(xdg_runtime, wayland_display); if (!wayland_socket || access(wayland_socket, F_OK) != 0) { fprintf(stderr, "Error: Wayland socket not found\n"); free(wayland_socket); free(abs_path); return EXIT_FAILURE; } printf("Wayland env validated: socket=%s\n", wayland_socket); free(wayland_socket); wl_display = wl_display_connect(NULL); if (!wl_display) { fprintf(stderr, "Error: Failed to connect Wayland Display\n"); free(abs_path); return EXIT_FAILURE; } wl_registry = wl_display_get_registry(wl_display); wl_registry_add_listener(wl_registry, &registry_listener, NULL); wl_display_roundtrip(wl_display); if (!wl_compositor || !ivi_app || !wl_shm) { fprintf(stderr, "Error: Missing required Wayland interfaces\n"); free(abs_path); goto cleanup_wayland; } if (!create_ivi_valid_surface()) { fprintf(stderr, "Error: Create valid IVI Surface failed\n"); free(abs_path); goto cleanup_wayland; } printf("Debug: Entering pipeline creation step...\n"); // 创建 pipeline pipeline = gst_element_factory_make("playbin", "video_pipeline"); if (!pipeline) { fprintf(stderr, "FATAL: Failed to create playbin pipeline\n"); free(abs_path); goto cleanup_wayland; } printf("Debug: Pipeline created (ptr: %p)\n", pipeline); // 创建 waylandsink 并直接向其传递上下文（核心修复） videosink = gst_element_factory_make("waylandsink", "video_sink"); if (!videosink) { fprintf(stderr, "FATAL: Failed to create waylandsink\n"); free(abs_path); goto cleanup_gst; } printf("Debug: Waylandsink created (ptr: %p)\n", videosink); // 关键：向 waylandsink 直接传递 display 上下文 if (!set_wayland_context_to_element(videosink, wl_display)) { fprintf(stderr, "ERROR: Failed to set display context to waylandsink - will not use external surface\n"); goto cleanup_gst; } // 绑定外部 wl_surface 到 waylandsink if (!wayland_surface) { fprintf(stderr, "FATAL: wayland_surface is NULL\n"); goto cleanup_gst; } gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(videosink), (guintptr)wayland_surface); // 额外设置属性，减少自动创建 surface 的概率 g_object_set(G_OBJECT(videosink), "sync", TRUE, "force-aspect-ratio", FALSE, // 禁用强制比例，避免 surface 重建 NULL); g_object_set(G_OBJECT(pipeline), "video-sink", videosink, NULL); printf("Debug: Bound waylandsink to wl_surface (ptr: %p)\n", wayland_surface); // 强制刷新 gst_video_overlay_expose(GST_VIDEO_OVERLAY(videosink)); printf("Debug: Sent expose event to waylandsink\n"); // 设置视频 URI video_uri = g_strconcat("file://", abs_path, NULL); free(abs_path); if (!video_uri) { fprintf(stderr, "Error: Invalid URI\n"); goto cleanup_gst; } g_object_set(G_OBJECT(pipeline), "uri", video_uri, NULL); printf("Video URI set: %s\n", video_uri); g_free(video_uri); // 启动播放 printf("Starting playback...\n"); ret = gst_element_set_state(pipeline, GST_STATE_READY); if (ret == GST_STATE_CHANGE_FAILURE) { fprintf(stderr, "Error: Failed to set pipeline to READY\n"); goto cleanup_gst; } usleep(500000); ret = gst_element_set_state(pipeline, GST_STATE_PLAYING); if (ret == GST_STATE_CHANGE_FAILURE) { fprintf(stderr, "Error: Failed to start playback\n"); goto cleanup_gst; } // 绑定图层 if (!setup_layer_and_surface(videosink_surface_id)) { exit_code = EXIT_FAILURE; goto cleanup_gst; } // 主消息循环 bus = gst_element_get_bus(pipeline); if (!bus) { fprintf(stderr, "Error: Get GStreamer bus failed\n"); exit_code = EXIT_FAILURE; goto cleanup_gst; } printf("Enter main loop (Ctrl+C to stop)...\n"); gboolean exit_loop = FALSE; while (!exit_loop) { msg = gst_bus_timed_pop(bus, 10 * GST_MSECOND); if (msg) { switch (GST_MESSAGE_TYPE(msg)) { case GST_MESSAGE_EOS: printf("Playback completed (EOS)\n"); exit_loop = TRUE; break; case GST_MESSAGE_ERROR: { GError *err; gchar *debug; gst_message_parse_error(msg, &err, &debug); fprintf(stderr, "GStreamer Error: %s (debug: %s)\n", err->message, debug); g_error_free(err); g_free(debug); exit_loop = TRUE; exit_code = EXIT_FAILURE; break; } default: break; } gst_message_unref(msg); } wl_display_dispatch_pending(wl_display); usleep(10000); } gst_object_unref(bus); cleanup_gst: cleanup_layer_and_surface(); if (videosink) gst_object_unref(videosink); if (pipeline) { gst_element_set_state(pipeline, GST_STATE_NULL); gst_object_unref(pipeline); } cleanup_wayland: if (ivi_surface) ivi_surface_destroy(ivi_surface); if (wayland_surface) wl_surface_destroy(wayland_surface); if (dummy_buffer) wl_buffer_destroy(dummy_buffer); if (ivi_app) ivi_application_destroy(ivi_app); if (wl_shm) wl_shm_destroy(wl_shm); if (wl_registry) wl_registry_destroy(wl_registry); if (wl_compositor) wl_compositor_destroy(wl_compositor); if (wl_display) wl_display_disconnect(wl_display); printf("Exiting with code: %d\n", exit_code); return exit_code; }
08-28
但是，这需要我们在应用程序中同时作为Wayland客户端，并且能够访问到waylandsink使用的同一个Wayland连接（display）和注册的全局对象。 具体步骤（使用Wayland客户端协议）： 1. 获取waylandsink使用的Wayland...
// 修改内存映射表（以ARMv7为例） static struct map_desc io_map __initdata = { .virtual = 0x20200000, // 虚拟地址起始 .pfn = __phys_to_pfn(0x10200000), // 对应的物理地址 .length = SZ_1M, // 映射区域大小 .type = MT_DEVICE // 设备内存类型 }; iotable_init(&io_map, 1); // 注册映射不对
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这个地址位于SRAM区域（0x20000000到0x3FFFFFFF），但可能由于以下原因导致访问失败： 1. 该地址未对齐（32位系统要求4字节对齐，而0x20208040是4字节对齐的，因为最后两位是0）。 2. 该地址尚未被映射到物理内存...
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Abaqus显式分析中Voigt粘弹性模型的VUMAT子程序实现与损伤准则扩展
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针对Abaqus显式动力学分析框架，本文介绍一种基于Voigt构型的粘弹性各向同性材料模型在VUMAT用户子程序中的实现方案。该子程序完整构建了Voigt粘弹性本构关系，适用于显式求解环境下的材料响应模拟。用户可根据具体分析需求，对子程序进行扩展修改，以引入基于应力状态或应变状态的损伤判据，从而模拟材料在复杂载荷下的渐进失效行为。 资源来源于网络分享，仅用于学习交流使用，请勿用于商业，如有侵权请联系我删除！
基于双模型架构的智能皮肤癌诊断系统项目极简说明_融合互联网加医疗与AI医学影像分析技术解决皮肤癌诊断中专业门槛高资源不均误诊率高等痛点核心采用ViTSCD模型基于VisionTra.zip
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共址网络中截止时间约束加权流量的调度算法.zip
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1.版本：matlab2014a/2019b/2024b 2.附赠案例数据可直接运行。 3.代码特点：参数化编程、参数可方便更改、代码编程思路清晰、注释明细。 4.适用对象：计算机，电子信息工程、数学等专业的大学生课程设计、期末大作业和毕业设计。
(gdb) bt #0 lv_obj_get_ext_draw_size (obj=obj@entry=0x0) at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/core/lv_obj_draw.c:313 #1 0x0004f490 in lv_obj_invalidate (obj=obj@entry=0x0) at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/core/lv_obj_pos.c:847 #2 0x0002fc50 in lv_label_set_text (obj=0x0, text=0xbeeca03c "2025-11-12") at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/widgets/label/lv_label.c:147 #3 0x000c9ebe in tp_lv_time_picker_set_show_time_only (obj=0x4dfd4c <work_mem_int+2506536>, time=<optimized out>) at TpTimePicker.c:341 #4 0x0014d274 in update_time_str_label (obj=obj@entry=0x460324 <work_mem_int+1983744>) at PlaybackBar.c:3961 #5 0x001514b4 in tp_lv_timebar_event_cb (class_p=<optimized out>, e=<optimized out>) at PlaybackBar.c:2268 #6 tp_lv_timebar_event_cb (class_p=<optimized out>, e=<optimized out>) at PlaybackBar.c:2216 #7 0x000481cc in lv_obj_event_base (class_p=<optimized out>, e=e@entry=0xbeeca2ac) at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/core/lv_obj_event.c:89 #8 0x00048242 in event_send_core (e=e@entry=0xbeeca2ac) at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/core/lv_obj_event.c:364 #9 0x0004833e in lv_obj_send_event (obj=<optimized out>, event_code=<optimized out>, param=param@entry=0x0) at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/core/lv_obj_event.c:67 #10 0x001edc4c in playbackimp_chn_list_change_task_cb (task=<optimized out>) at PlaybackImp.c:689 #11 0x001a53cc in async_task_finish_process (arg=0x3d3bb8 <work_mem_int+1408404>) at TpAsyncTaskQueue.c:994 #12 0x001c45e2 in tp_sync_timer (timer=<optimized out>) at AppInit.c:757 #13 0x0003fadc in lv_timer_exec (timer=0x3aff24 <work_mem_int+1261824>) at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/misc/lv_timer.c:326 #14 lv_timer_handler () at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/misc/lv_timer.c:107 #15 lv_timer_handler () at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/lvgl/src/misc/lv_timer.c:63 #16 0x00015758 in main () at /home/xiejikai/24q3/torchlight/build_dir/target-arm-openwrt-linux-uclibcgnueabihf/nvrgui_lvgl/main.c:75 (gdb) p *(tp_lv_time_picker_t *)0x4dfd4c $10 = {obj = {class_p = 0x27be24 <work_mem_int>, parent = 0x27be24 <work_mem_int>, spec_attr = 0x0, styles = 0x0, style_main_prop_is_set = 2611476, style_other_prop_is_set = 56, user_data = 0x0, id = 0x0, coords = {x1 = 391857407, y1 = 0, x2 = 16777215, y2 = 0}, flags = -16777216, state = 64836, layout_inv = 1, readjust_scroll_after_layout = 0, scr_layout_inv = 1, skip_trans = 1, style_cnt = 4, h_layout = 0, w_layout = 0, is_deleting = 0}, ta = 0x57, popup = 0x3d72d0 <work_mem_int+1422508>, header = 0x1, year_label = 0x717, month_label = 0x3de, calendar = 0x739, time_cont = 0x3e8, hms_selector = 0x717, footer = 0x3de, year_picker = 0x739, month_picker = 0x3e8, hms_picker = 0x0, show_label = 0x0, icon = 0x0, showed_date = {year = 0, month = 0 '\000', day = 0 '\000'}, selected_date = {year = 812, month = 0 '\000', day = 0 '\000'}, origin_date = {year = 0, month = 0 '\000', day = 0 '\000'}, clicked_date = {year = 0, month = 0 '\000', day = 0 '\000'}, date_format = 1079, hour_format = (TP_HOUR_FORMAT_12 | unknown: 2), hour = 224 '\340', minute = 253 '\375', second = 77 'M', origin_hour = 224 '\340', origin_minute = 253 '\375', origin_second = 77 'M', am_pm = 77 'M', content_cont = 0x3b, year_grid_btn = {0x430384 <work_mem_int+1787232>, 0x27be24 <work_mem_int>, 0x0, 0x0, 0x27d914 <work_mem_int+6896>, 0x38, 0x0, 0x0, 0x175b44ff, 0x0, 0xffffff <work_mem_int+14172635>, 0x0}, month_grid_btn = {0xff000000, 0x4dfd44 <work_mem_int+2506528>, 0x57, 0x3c3ce0 <work_mem_int+1343164>, 0x1, 0x48f, 0x3de, 0x48f, 0x3e8, 0x48f, 0x3de, 0x48f}, is_calendar = 232} (gdb) p tp_timebar $11 = (tp_lv_timebar_t *) 0x460324 <work_mem_int+1983744> (gdb) p g_playback_timebar_obj $12 = (lv_obj_t *) 0x460324 <work_mem_int+1983744> (gdb) p (tp_lv_timebar_t *) 0x460324 $13 = (tp_lv_timebar_t *) 0x460324 <work_mem_int+1983744> (gdb) p *(tp_lv_timebar_t *) 0x460324 $14 = {obj = {class_p = 0x23fd60 <tp_lv_timebar_class>, parent = 0x420dd8 <work_mem_int+1724340>, spec_attr = 0x3daba8 <work_mem_int+1437060>, styles = 0x3c6ff4 <work_mem_int+1356240>, style_main_prop_is_set = 65551, style_other_prop_is_set = 0, user_data = 0x606f50 <work_mem_int+3715372>, id = 0x971, coords = {x1 = 280, y1 = 864, x2 = 1919, y2 = 1079}, flags = 64358, state = 0, layout_inv = 0, readjust_scroll_after_layout = 0, scr_layout_inv = 0, skip_trans = 0, style_cnt = 1, h_layout = 0, w_layout = 0, is_deleting = 0}, ctrl_obj = 0x3dab6c <work_mem_int+1437000>, chn_name_obj = 0x3cc31c <work_mem_int+1377528>, video_info_obj = 0x3cc224 <work_mem_int+1377280>, bottom_ctrl_obj = 0x3e2ee8 <work_mem_int+1470660>, play_obj = 0x3d56a8 <work_mem_int+1415300>, single_frame_obj = 0x3d57e0 <work_mem_int+1415612>, speed_obj = 0x4449bc <work_mem_int+1870744>, smartspeed_obj = 0x4b7560 <work_mem_int+2340668>, cut_obj = 0x4810d4 <work_mem_int+2118320>, export_obj = 0x4f30d4 <work_mem_int+2585264>, export_label_obj = 0x52bcf8 <work_mem_int+2817748>, scale_obj = 0x42b620 <work_mem_int+1767420>, people_obj = 0x46771c <work_mem_int+2013432>, vehicle_obj = 0x46788c <work_mem_int+2013800>, pet_obj = 0x4679bc <work_mem_int+2014104>, cut_begin_obj = 0x0, cut_end_obj = 0x0, b30_obj = 0x42a540 <work_mem_int+1763100>, calendar_obj = 0x4dfd4c <work_mem_int+2506536>, f30_obj = 0x3d4f8c <work_mem_int+1413480>, hq_obj = 0x467acc <work_mem_int+2014376>, audio_obj = 0x42a260 <work_mem_int+1762364>, zoom_obj = 0x425244 <work_mem_int+1741856>, screennum_obj = 0x0, fullscreen_obj = 0x3cc104 <work_mem_int+1376992>, save_clip_btn_obj = 0x0, continuous_rec_obj = 0x3e2f7c <work_mem_int+1470808>, event_rec_obj = 0x463448 <work_mem_int+1996324>, expend_obj = 0x4dec60 <work_mem_int+2502204>, clear_obj = 0x3e3378 <work_mem_int+1471828>, tip_label = 0x0, play_state = 0, scale_select_idx = 0, scale_idx = 28, scale = 1440, start_time = 1762833600, cur_time = 1762876800, disp_time_gap = 120, time_clip = 12, pressing = 0, volume_val = 0, speed_index = 4, scrollbar_pos = 0, hq_index = 0, pressed_point = {x = 0, y = 0}, last_point = {x = 0, y = 0}, disp_time_label = {0x429158 <work_mem_int+1758004>, 0x429250 <work_mem_int+1758252>, 0x429348 <work_mem_int+1758500>, 0x429444 <work_mem_int+1758752>, 0x466338 <work_mem_int+2008340>, 0x46640c <work_mem_int+2008552>, 0x466514 <work_mem_int+2008816>, 0x466610 <work_mem_int+2009068>, 0x46670c <work_mem_int+2009320>, 0x46680c <work_mem_int+2009576>, 0x478364 <work_mem_int+2082112>, 0x47843c <work_mem_int+2082328>, 0x478538 <work_mem_int+2082580>, 0x478638 <work_mem_int+2082836>, 0x47873c <work_mem_int+2083096>, 0x478838 <work_mem_int+2083348>}, hover_time_obj = 0x462d38 <work_mem_int+1994516>, chn_label = {0x3cc3c8 <work_mem_int+1377700>, 0x3cc500 <work_mem_int+1378012>, 0x3cc5f8 <work_mem_int+1378260>, 0x42905c <work_mem_int+1757752>}, scrollbar_obj = 0x4def7c <work_mem_int+2503000>, show_scrollbar = 1, chn_num = 8, show_chn_idx = 0, expend = 1, mode = 0, stop_update_time = 0, cur_chn = 0, full_show = 0, export_slice_num = 0, cut_setting_time = 0, left_cut_bar_hoverd = false, right_cut_bar_hoverd = false, left_cut_bar_area = {x1 = 0, y1 = 0, x2 = 0, y2 = 0}, right_cut_bar_area = {x1 = 0, y1 = 0, x2 = 0, y2 = 0}} (gdb) p tp_timebar $15 = (tp_lv_timebar_t *) 0x460324 <work_mem_int+1983744> (gdb) p tp_timebar->ctrl_obj $16 = (lv_obj_t *) 0x3dab6c <work_mem_int+1437000> (gdb) p *(lv_obj_t *) A syntax error in expression, near `'. (gdb) p *(lv_obj_t *) A syntax error in expression, near `'. (gdb) p *(lv_obj_t *)0x460324 $17 = {class_p = 0x23fd60 <tp_lv_timebar_class>, parent = 0x420dd8 <work_mem_int+1724340>, spec_attr = 0x3daba8 <work_mem_int+1437060>, styles = 0x3c6ff4 <work_mem_int+1356240>, style_main_prop_is_set = 65551, style_other_prop_is_set = 0, user_data = 0x606f50 <work_mem_int+3715372>, id = 0x971, coords = {x1 = 280, y1 = 864, x2 = 1919, y2 = 1079}, flags = 64358, state = 0, layout_inv = 0, readjust_scroll_after_layout = 0, scr_layout_inv = 0, skip_trans = 0, style_cnt = 1, h_layout = 0, w_layout = 0, is_deleting = 0} (gdb) p *(lv_obj_t *) 0x3dab6c $18 = {class_p = 0x21e488 <lv_obj_class>, parent = 0x460324 <work_mem_int+1983744>, spec_attr = 0x3dac98 <work_mem_int+1437300>, styles = 0x3dabe8 <work_mem_int+1437124>, style_main_prop_is_set = 232015, style_other_prop_is_set = 4111, user_data = 0x0, id = 0x1c42aa <tp_lv_muti_dropdown_set_select+18>, coords = {x1 = 280, y1 = 864, x2 = 1903, y2 = 918}, flags = 64358, state = 0, layout_inv = 0, readjust_scroll_after_layout = 0, scr_layout_inv = 0, skip_trans = 0, style_cnt = 4, h_layout = 1, w_layout = 1, is_deleting = 0} (gdb) f 5 #5 0x001514b4 in tp_lv_timebar_event_cb (class_p=<optimized out>, e=<optimized out>) at PlaybackBar.c:2268 2268 update_time_str_label(obj); (gdb) tp_timebar->chn_num Undefined command: "tp_timebar->chn_num". Try "help". (gdb) p tp_timebar->chn_num $19 = 8 (gdb) p tp_timebar->calendar_obj $20 = (lv_obj_t *) 0x4dfd4c <work_mem_int+2506536> (gdb) p *(lv_obj_t *) 0x4dfd4c $21 = {class_p = 0x27be24 <work_mem_int>, parent = 0x27be24 <work_mem_int>, spec_attr = 0x0, styles = 0x0, style_main_prop_is_set = 2611476, style_other_prop_is_set = 56, user_data = 0x0, id = 0x0, coords = {x1 = 391857407, y1 = 0, x2 = 16777215, y2 = 0}, flags = -16777216, state = 64836, layout_inv = 1, readjust_scroll_after_layout = 0, scr_layout_inv = 1, skip_trans = 1, style_cnt = 4, h_layout = 0, w_layout = 0, is_deleting = 0} (gdb) p *(lv_obj_t *)0x27be24 $22 = {class_p = 0x0, parent = 0x0, spec_attr = 0x4deff8 <work_mem_int+2503124>, styles = 0x3cc4d8 <work_mem_int+1377972>, style_main_prop_is_set = 1050623, style_other_prop_is_set = 3271562920, user_data = 0xf399dbff, id = 0x35c7bdff, coords = {x1 = -1589395569, y1 = 1596, x2 = 385884183, y2 = 604013289}, flags = 8200, state = 129, layout_inv = 1, readjust_scroll_after_layout = 0, scr_layout_inv = 0, skip_trans = 0, style_cnt = 0, h_layout = 0, w_layout = 0, is_deleting = 0} (gdb) x/16xw 0x4dfd4c 0x4dfd4c <work_mem_int.12761+2506536>: 0x0027be24 0x0027be24 0x00000000 0x00000000 0x4dfd5c <work_mem_int.12761+2506552>: 0x0027d914 0x00000038 0x00000000 0x00000000 0x4dfd6c <work_mem_int.12761+2506568>: 0x175b44ff 0x00000000 0x00ffffff 0x00000000 0x4dfd7c <work_mem_int.12761+2506584>: 0xff000000 0x004dfd44 0x00000057 0x003d72d0 帮我分析上述调用栈
11-18
4. **#3**: `tp_lv_time_picker_set_show_time_only(obj=0x4dfd4c, time=...)`：在`TpTimePicker.c:341`行调用了`lv_label_set_text`，传入的obj是0x4dfd4c（这是一个非空指针），但为什么在#2中变成了0x0？...
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