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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Manually marking the .eh_frame_hdr as DW_EH_PE_omit to make libunwind to do
// the linear search.
// Assuming the begining of the function is at the start of the FDE range.
// clang-format off
// REQUIRES: target={{x86_64-.+-linux-gnu}}
// REQUIRES: objcopy-available
// TODO: Figure out why this fails with Memory Sanitizer.
// XFAIL: msan
// RUN: %{build}
// RUN: %{objcopy} --dump-section .eh_frame_hdr=%t_ehf_hdr.bin %t.exe
// RUN: echo -ne '\xFF' | dd of=%t_ehf_hdr.bin bs=1 seek=2 count=2 conv=notrunc status=none
// RUN: %{objcopy} --update-section .eh_frame_hdr=%t_ehf_hdr.bin %t.exe
// RUN: %{exec} %t.exe
// clang-format on
#include <assert.h>
#include <libunwind.h>
#include <stdint.h>
#include <stdio.h>
#include <unwind.h>
void f() {
printf("123\n");
void *pc = __builtin_return_address(0);
void *fpc = (void *)&f;
void *fpc1 = (void *)((uintptr_t)fpc + 1);
struct dwarf_eh_bases bases;
const void *fde_pc = _Unwind_Find_FDE(pc, &bases);
const void *fde_fpc = _Unwind_Find_FDE(fpc, &bases);
const void *fde_fpc1 = _Unwind_Find_FDE(fpc1, &bases);
printf("fde_pc = %p\n", fde_pc);
printf("fde_fpc = %p\n", fde_fpc);
printf("fde_fpc1 = %p\n", fde_fpc1);
fflush(stdout);
assert(fde_pc != NULL);
assert(fde_fpc != NULL);
assert(fde_fpc1 != NULL);
assert(fde_fpc == fde_fpc1);
}
int main(int, char **) {
f();
return 0;
}
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