temp

README.md

@@ -67,6 +67,9 @@ make && insmod source/variable_monitor.ko
 # sudo dnf install -y epel-release
 # sudo dnf makecache
 sudo yum install -y libunwind-devel.x86_64
+yum config-manager --set-enabled powertools
+sudo dnf makecache
+yum install -y libdwarf-devel.x86_64
 # debian 系
 sudo apt-get update && apt-get install -y elfutils
 sudo apt-get update && apt-get install -y libunwind8
@@ -263,4 +266,9 @@ variable monitor 添加/删除
 #define __task_contributes_to_load(task)                                                                               \
     ((READ_ONCE(task->__state) & TASK_UNINTERRUPTIBLE) != 0 && (task->flags & PF_FROZEN) == 0 &&                       \
      (READ_ONCE(task->__state) & TASK_NOLOAD) == 0)
+```
+
+```
+docker build -t userstack-image .
+docker run --privileged --device=/d/variable_monitor -v /:/host -it userstack-image
 ```

source/ucli/elf.cc

@@ -266,6 +266,55 @@ static void get_all_symbols(std::set<symbol> &ss, symbol_sections_ctx *si,
 //   }
 // }
 
+bool is_stripped(const char* path) {
+  char command[256];
+  snprintf(command, sizeof(command), "file %s", path);
+
+  FILE* fp = popen(command, "r");
+  if (fp == NULL) {
+    // handle error
+    return false;
+  }
+
+  char output[256];
+  fgets(output, sizeof(output), fp);
+  pclose(fp);
+
+  return strstr(output, "stripped") != NULL;
+}
+
+#define MAX_LINE_LENGTH 1024
+void get_symbol_from_elf_gdb(std::set<symbol> &ss, const char *path) {
+    FILE *fp;
+    char cmd[MAX_LINE_LENGTH];
+    char line[MAX_LINE_LENGTH];
+    // 构建 GDB 命令
+    snprintf(cmd, sizeof(cmd),
+             "gdb -batch -ex \"file %s\" -ex \"info functions\"", path);
+
+    // 执行 GDB 命令并获取输出
+    fp = popen(cmd, "r");
+    if (fp == NULL) {
+      perror("popen");
+      return ;
+  }
+
+  // 读取并解析 GDB 的输出
+  while (fgets(line, sizeof(line), fp) != NULL) {
+    unsigned long address;
+    char name[MAX_LINE_LENGTH];
+
+    // 解析函数名和地址
+    if (sscanf(line, "%lx %s", &address, name) == 2) {
+      printf("Name: %s, Address: %lx\n", name, address);
+    }
+  }
+
+  // 关闭 GDB 进程
+  pclose(fp);
+  //
+}
+
 bool get_symbol_from_elf(std::set<symbol> &ss, const char *path) {
   static int first_init = 0;
 
@@ -276,6 +325,13 @@ bool get_symbol_from_elf(std::set<symbol> &ss, const char *path) {
 
   int is_reloc = 0;
   elf_version(EV_CURRENT);
+
+  // Check if the file attribute contains "stripped"
+  if (is_stripped(path)){
+    get_symbol_from_elf_gdb(ss, path);
+    return true;
+  }
+
   int fd = open(path, O_RDONLY);
 
   Elf *elf = elf_begin(fd, ELF_C_READ, NULL);