1# REQUIRES: x86, linux
2# RUN: %{build} -target x86_64-unknown-linux-gnu
3# RUN: %{run}
4
5# The following assembly is a translation of this code:
6#
7#   _Unwind_Reason_Code callback(int, _Unwind_Action, long unsigned int,
8#                                _Unwind_Exception*, _Unwind_Context*, void*) {
9#     return _Unwind_Reason_Code(0);
10#   }
11#
12#   int main() {
13#     asm(".cfi_remember_state\n\t");
14#     _Unwind_Exception exc;
15#     _Unwind_ForcedUnwind(&exc, callback, 0);
16#     asm(".cfi_restore_state\n\t");
17#   }
18#
19# When unwinding, the CFI parser will stop parsing opcodes after the current PC,
20# so in this case the DW_CFA_restore_state opcode will never be processed and,
21# if the library doesn't clean up properly, the store allocated by
22# DW_CFA_remember_state will be leaked.
23#
24# This test will fail when linked with an asan-enabled libunwind if the
25# remembered state is leaked.
26
27    SIZEOF_UNWIND_EXCEPTION = 32
28
29    .text
30callback:
31    xorl    %eax, %eax
32    retq
33
34    .globl    main                    # -- Begin function main
35    .p2align    4, 0x90
36    .type    main,@function
37main:                                   # @main
38    .cfi_startproc
39    subq    $8, %rsp   # Adjust stack alignment
40    subq    $SIZEOF_UNWIND_EXCEPTION, %rsp
41    .cfi_def_cfa_offset 48
42    .cfi_remember_state
43    movq    %rsp, %rdi
44    movabsq $callback, %rsi
45    xorl    %edx, %edx
46    callq    _Unwind_ForcedUnwind
47    .cfi_restore_state
48    xorl    %eax, %eax
49    addq    $SIZEOF_UNWIND_EXCEPTION, %rsp
50    addq    $8, %rsp   # Undo stack alignment adjustment
51    .cfi_def_cfa_offset 8
52    retq
53.Lfunc_end1:
54    .size    main, .Lfunc_end1-main
55    .cfi_endproc
56                                        # -- End function
57