1#include <stdio.h>
2#include <unwind.h>
3
4extern "C" void arm_function_3(int* p);
5extern "C" void thumb_function_1(int* p);
6extern "C" void thumb_function_2(int* p);
7
8extern "C" _Unwind_Reason_Code trace_function(_Unwind_Context* context, void *) {
9    printf("0x%x\n", _Unwind_GetIP(context));
10    fflush(stdout);
11    return _URC_NO_REASON;
12}
13
14void thumb_function_1(int*) {
15    int a = 0;
16    arm_function_3(&a);
17}
18
19void thumb_function_2(int*) {
20    printf("unwinding...\n");
21    _Unwind_Backtrace(trace_function, (void*) "backtrace!");
22}
23