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update libunwind to llvm11rc2

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This commit is contained in:
Andrew Kelley 2020-08-20 13:36:44 -07:00
parent 1de2c647df
commit 3aeeb21b82
1 changed files with 6 additions and 0 deletions
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6
lib/libunwind/src/AddressSpace.hpp
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@ -452,10 +452,12 @@ struct _LIBUNWIND_HIDDEN dl_iterate_cb_data {
#error "_LIBUNWIND_SUPPORT_DWARF_UNWIND requires _LIBUNWIND_SUPPORT_DWARF_INDEX on this platform."
#endif
#if defined(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
#include "FrameHeaderCache.hpp"
// There should be just one of these per process.
static FrameHeaderCache ProcessFrameHeaderCache;
#endif
static bool checkAddrInSegment(const Elf_Phdr *phdr, size_t image_base,
dl_iterate_cb_data *cbdata) {
@ -476,8 +478,10 @@ int findUnwindSectionsByPhdr(struct dl_phdr_info *pinfo, size_t pinfo_size,
auto cbdata = static_cast<dl_iterate_cb_data *>(data);
if (pinfo->dlpi_phnum == 0 || cbdata->targetAddr < pinfo->dlpi_addr)
return 0;
#if defined(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
if (ProcessFrameHeaderCache.find(pinfo, pinfo_size, data))
return 1;
#endif
Elf_Addr image_base = calculateImageBase(pinfo);
bool found_obj = false;
@ -505,7 +509,9 @@ int findUnwindSectionsByPhdr(struct dl_phdr_info *pinfo, size_t pinfo_size,
found_obj = checkAddrInSegment(phdr, image_base, cbdata);
}
if (found_obj && found_hdr) {
#if defined(_LIBUNWIND_USE_FRAME_HEADER_CACHE)
ProcessFrameHeaderCache.add(cbdata->sects);
#endif
return 1;
}
}