remove libunwind

testcase/userstack.c

@@ -1,5 +1,5 @@
 #include <stdio.h>
-#include <libunwind.h>
+// #include <libunwind.h>
 #include <unistd.h>
 
 void customFunction1(int n);
@@ -7,38 +7,38 @@ void customFunction2(int n);
 void customFunction3(int n);
 
 // Call this function to get a backtrace.
-void backtrace() {
-  unw_cursor_t cursor;
-  unw_context_t context;
+// void backtrace() {
+//   unw_cursor_t cursor;
+//   unw_context_t context;
 
-  // Initialize cursor to current frame for local unwinding.
-  unw_getcontext(&context);
-  unw_init_local(&cursor, &context);
+//   // Initialize cursor to current frame for local unwinding.
+//   unw_getcontext(&context);
+//   unw_init_local(&cursor, &context);
 
-  // Unwind frames one by one, going up the frame stack.
-  while (unw_step(&cursor) > 0) {
-    unw_word_t offset, pc;
-    unw_get_reg(&cursor, UNW_REG_IP, &pc);
-    if (pc == 0) {
-      break;
-    }
-    printf("0x%lx:", pc);
+//   // Unwind frames one by one, going up the frame stack.
+//   while (unw_step(&cursor) > 0) {
+//     unw_word_t offset, pc;
+//     unw_get_reg(&cursor, UNW_REG_IP, &pc);
+//     if (pc == 0) {
+//       break;
+//     }
+//     printf("0x%lx:", pc);
 
-    char sym[256];
-    if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
-      printf(" (%s+0x%lx)\n", sym, offset);
-    } else {
-      printf(" -- error: unable to obtain symbol name for this frame\n");
-    }
-  }
-}
+//     char sym[256];
+//     if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
+//       printf(" (%s+0x%lx)\n", sym, offset);
+//     } else {
+//       printf(" -- error: unable to obtain symbol name for this frame\n");
+//     }
+//   }
+// }
 
 void customFunction1(int n) {
     if(n <= 0) {
         printf("End of recursion\n");
         // output backtrace
         printf("pid: %d\n", getpid());
-        backtrace();
+        // backtrace();
         while (1) {
             sleep(1);
         } // never return, keep stack