frameheadercache_test.pass.cpp
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// 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.
#if defined(_LIBUNWIND_USE_DL_ITERATE_PHDR) && \
defined(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
#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 kTextSegmentLength 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.text_segment_length = kTextSegmentLength;
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 + (kTextSegmentLength * 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