[lldb] Use correct path for lldb-server executable

Author: yuvald-sweet-security

lldb/tools/lldb-server/lldb-platform.cpp

@@ -545,13 +545,28 @@ int main_platform(int argc, char *argv[]) {
 
   MainLoop main_loop;
   {
+    char progpath[1024];
+#if defined(_WIN32)
+    if (GetModuleFileName(NULL, progpath, sizeof(progpath)) == 0) {
+      printf("Error retrieving executable path.\n");
+      return 1;
+    }
+#else
+    ssize_t len = readlink("/proc/self/exe", progpath, sizeof(progpath) - 1);
+    if (len == -1) {
+      perror("readlink");
+      return 1;
+    }
+    progpath[len] = '\0';
+#endif
+
     llvm::Expected<std::vector<MainLoopBase::ReadHandleUP>> platform_handles =
         platform_sock->Accept(
             main_loop, [progname, gdbserver_port, &inferior_arguments, log_file,
                         log_channels, &main_loop,
                         &platform_handles](std::unique_ptr<Socket> sock_up) {
               printf("Connection established.\n");
-              Status error = spawn_process(progname, sock_up.get(),
+              Status error = spawn_process(progpath, sock_up.get(),
                                            gdbserver_port, inferior_arguments,
                                            log_file, log_channels, main_loop);
               if (error.Fail()) {