You've already forked llvm-project
mirror of
https://github.com/encounter/llvm-project.git
synced 2026-03-30 11:27:19 -07:00
Sterling Augustine
a20f5fe708
Although it works fine with glibc, as currently implemented the frameheader cache is incompatible with certain platforms with slightly different locking semantics inside dl_iterate_phdr. Therefore only enable it when it is turned on explicitly with a configure-time option. Differential Revision: https://reviews.llvm.org/D86163
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
// The other libunwind tests don't test internal interfaces, so the include path
|
|
// is a little wonky.
|
|
#include "../src/config.h"
|
|
|
|
// Only run this test under supported configurations.
|
|
// The frame header cache should work fine for other architectures,
|
|
// but the #ifdefs end up being even more complicated than this.
|
|
|
|
#if defined(__x86_64__) && defined(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
|
|
|
|
// This #if chain is ugly, but see the comments in AddressSpace.hpp for
|
|
// the reasoning.
|
|
|
|
#ifdef __APPLE__
|
|
int main() { return 0; }
|
|
#elif defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND) && defined(_LIBUNWIND_IS_BAREMETAL)
|
|
int main() { return 0; }
|
|
#elif defined(_LIBUNWIND_ARM_EHABI) && defined(_LIBUNWIND_IS_BAREMETAL)
|
|
int main() { return 0; }
|
|
#elif defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND) && defined(_WIN32)
|
|
int main() { return 0; }
|
|
#elif defined(_LIBUNWIND_SUPPORT_SEH_UNWIND) && defined(_WIN32)
|
|
int main() { return 0; }
|
|
#elif defined(_LIBUNWIND_ARM_EHABI) && defined(__BIONIC__)
|
|
int main() { return 0; }
|
|
#elif defined(_LIBUNWIND_ARM_EHABI) || defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
|
|
|
|
#include <link.h>
|
|
#include <stdio.h>
|
|
|
|
// This file defines several of the data structures needed here,
|
|
// and includes FrameHeaderCache.hpp as well.
|
|
#include "../src/AddressSpace.hpp"
|
|
|
|
#define kBaseAddr 0xFFF000
|
|
#define kDwarfSectionLength 0xFF
|
|
|
|
using namespace libunwind;
|
|
|
|
int main() {
|
|
FrameHeaderCache FHC;
|
|
struct dl_phdr_info PInfo;
|
|
memset(&PInfo, 0, sizeof(PInfo));
|
|
// The cache itself should only care about these two fields--they
|
|
// tell the cache to invalidate or not; everything else is handled
|
|
// by AddressSpace.hpp.
|
|
PInfo.dlpi_adds = 6;
|
|
PInfo.dlpi_subs = 7;
|
|
|
|
UnwindInfoSections UIS;
|
|
UIS.dso_base = kBaseAddr;
|
|
UIS.dwarf_section_length = kDwarfSectionLength;
|
|
dl_iterate_cb_data CBData;
|
|
// Unused by the cache.
|
|
CBData.addressSpace = nullptr;
|
|
CBData.sects = &UIS;
|
|
CBData.targetAddr = kBaseAddr + 1;
|
|
|
|
// Nothing present, shouldn't find.
|
|
if (FHC.find(&PInfo, 0, &CBData))
|
|
abort();
|
|
FHC.add(&UIS);
|
|
// Just added. Should find.
|
|
if (!FHC.find(&PInfo, 0, &CBData))
|
|
abort();
|
|
// Cache is invalid. Shouldn't find.
|
|
PInfo.dlpi_adds++;
|
|
if (FHC.find(&PInfo, 0, &CBData))
|
|
abort();
|
|
|
|
FHC.add(&UIS);
|
|
CBData.targetAddr = kBaseAddr - 1;
|
|
// Shouldn't find something outside of the addresses.
|
|
if (FHC.find(&PInfo, 0, &CBData))
|
|
abort();
|
|
// Add enough things to the cache that the entry is evicted.
|
|
for (int i = 0; i < 9; i++) {
|
|
UIS.dso_base = kBaseAddr + (kDwarfSectionLength * i);
|
|
FHC.add(&UIS);
|
|
}
|
|
CBData.targetAddr = kBaseAddr;
|
|
// Should have been evicted.
|
|
if (FHC.find(&PInfo, 0, &CBData))
|
|
abort();
|
|
return 0;
|
|
}
|
|
#else
|
|
int main() { return 0; }
|
|
#endif
|
|
#else
|
|
int main() { return 0;}
|
|
#endif
|