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ebfeeec4c4
When testing with sanitizers enabled, we need to link against a plethora of system libraries. Using `-nodefaultlibs` like we used to breaks this, and we would have to add all these system libraries manually, which is not portable and error prone. Instead, stop using `-nodefaultlibs` so that we get the libraries added by default by the compiler. The only caveat with this approach is that we are now relying on the fact that `-L <path-to-local-libunwind>` will cause the just built libunwind to be selected before the system implementation (either of libunwind or libgcc_s.so), which is somewhat fragile. This patch also turns the 32 bit multilib build into a soft failure since we are in the process of removing it anyway, see D114473 for details. This patch is incompatible with the 32 bit multilib build because Ubuntu does not provide a proper libstdc++ for 32 bits, and that is required when running with sanitizers enabled. Differential Revision: https://reviews.llvm.org/D114385
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
// The other libunwind tests don't test internal interfaces, so the include path
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// is a little wonky.
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#include "../src/config.h"
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// Only run this test under supported configurations.
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#if defined(_LIBUNWIND_USE_DL_ITERATE_PHDR) && \
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defined(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
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#include <link.h>
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#include <stdio.h>
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// This file defines several of the data structures needed here,
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// and includes FrameHeaderCache.hpp as well.
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#include "../src/AddressSpace.hpp"
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#define kBaseAddr 0xFFF000
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#define kTextSegmentLength 0xFF
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using namespace libunwind;
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int main(int, char**) {
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FrameHeaderCache FHC;
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struct dl_phdr_info PInfo;
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memset(&PInfo, 0, sizeof(PInfo));
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// The cache itself should only care about these two fields--they
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// tell the cache to invalidate or not; everything else is handled
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// by AddressSpace.hpp.
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PInfo.dlpi_adds = 6;
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PInfo.dlpi_subs = 7;
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UnwindInfoSections UIS;
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UIS.dso_base = kBaseAddr;
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UIS.text_segment_length = kTextSegmentLength;
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dl_iterate_cb_data CBData;
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// Unused by the cache.
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CBData.addressSpace = nullptr;
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CBData.sects = &UIS;
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CBData.targetAddr = kBaseAddr + 1;
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// Nothing present, shouldn't find.
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if (FHC.find(&PInfo, 0, &CBData))
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abort();
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FHC.add(&UIS);
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// Just added. Should find.
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if (!FHC.find(&PInfo, 0, &CBData))
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abort();
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// Cache is invalid. Shouldn't find.
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PInfo.dlpi_adds++;
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if (FHC.find(&PInfo, 0, &CBData))
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abort();
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FHC.add(&UIS);
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CBData.targetAddr = kBaseAddr - 1;
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// Shouldn't find something outside of the addresses.
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if (FHC.find(&PInfo, 0, &CBData))
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abort();
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// Add enough things to the cache that the entry is evicted.
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for (int i = 0; i < 9; i++) {
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UIS.dso_base = kBaseAddr + (kTextSegmentLength * i);
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FHC.add(&UIS);
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}
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CBData.targetAddr = kBaseAddr;
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// Should have been evicted.
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if (FHC.find(&PInfo, 0, &CBData))
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abort();
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return 0;
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}
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#else
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int main(int, char**) { return 0;}
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#endif
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