I agree that checking the size passed to backtrace_get_view seems like
the most reliable approach to avoid problems with large files on
32-bit systems.  How does this patch look?

Ian


2019-01-18  Ian Lance Taylor  <iant@golang.org>

PR libbacktrace/88890
* mmapio.c (backtrace_get_view): Change size parameter to
uint64_t.  Check that value fits in size_t.
* read.c (backtrace_get_view): Likewise.
* internal.h (backtrace_get_view): Update declaration.
* elf.c (elf_add): Pass shstrhdr->sh_size to backtrace_get_view.