Assigning uint64_t to size_t or uintptr_t caused a build error.
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If maximum_operations_per_instruction != 1, it is VLIW.
But there seems no need to support such architecture now.
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ICC uses DWARF4 for .debug_line which adds
maximum_operations_per_instruction in its header.
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It seems nobody on earth is interested in such thing for it.
Ignore compiler warnings.
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Though DWARF specifies "the applicable base address defaults to the base
address of the compilation unit", but GCC seems to use zero as default.
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../addr2line.c: In function ‘fill_lines’:
../addr2line.c:709:8: warning: ‘file’ may be used uninitialized in this function [-Wmaybe-uninitialized]
if (file != NULL) {
^
../addr2line.c:535:11: warning: ‘filesize’ may be used uninitialized in this function [-Wmaybe-uninitialized]
off_t filesize;
^~~~~~~~
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FreeBSD 11.0 unfortunately lacks ELF compression definitions in their
elf.h (sys/elf_common.h), and 11.1 introduced them.
b9167d33a1
Though we can add workaround, we simply drop support because
FreeBSD 11.0 is already EOL at November 30, 2017.
https://www.freebsd.org/security/unsupported.html
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POSIX mmap(3) manpage stipulates mmap bumps the reference
count of the file description. Thus keeping a file descriptor
to maintain the reference is not necessary.
If this didn't work, every extension .so would require a
permanent FD, which is obviously not the case.
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* addr2line.c: Because stdbool.h is a C99 feature, compile error
occurs with some old compilers without specifying C99 options.
Fix compile error with Oracle Solaris Studio 12.4 on Solaris 10.
[Bug #14200] [ruby-dev:50366]
* missing/stdbool.h: Alternative of stdbool.h for C89 compilers.
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SHF_COMPRESSED was not defined until glibc 2.22, and there are
older distros (e.g. Debian 8.x jessie) which do not have this
defined.
Perhaps it is safe to define SHF_COMPRESSED to (1 << 11) ourselves,
too, since ELF should be a standardized format.
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To identify the line of backtrace with ease, show the offset address of library.
You can just find the source filename and the line with
`addr2line -e libruby.so.2.5.0 0xXXXX`
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