Fedora 33 Update: dwarves-1.20-1.fc33

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Fedora Update Notification
FEDORA-2021-804e7a572c
2021-02-06 01:15:55.080839
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Name        : dwarves
Product     : Fedora 33
Version     : 1.20
Release     : 1.fc33
URL         : http://acmel.wordpress.com
Summary     : Debugging Information Manipulation Tools (pahole & friends)
Description :
dwarves is a set of tools that use the debugging information inserted in
ELF binaries by compilers such as GCC, used by well known debuggers such as
GDB, and more recent ones such as systemtap.

Utilities in the dwarves suite include pahole, that can be used to find
alignment holes in structs and classes in languages such as C, C++, but not
limited to these.

It also extracts other information such as CPU cacheline alignment, helping
pack those structures to achieve more cache hits.

These tools can also be used to encode and read the BTF type information format
used with the Linux kernel bpf syscall, using 'pahole -J' and 'pahole -F btf'.

A diff like tool, codiff can be used to compare the effects changes in source
code generate on the resulting binaries.

Another tool is pfunct, that can be used to find all sorts of information about
functions, inlines, decisions made by the compiler about inlining, etc.

One example of pfunct usage is in the fullcircle tool, a shell that drivers
pfunct to generate compileable code out of a .o file and then build it using
gcc, with the same compiler flags, and then use codiff to make sure the
original .o file and the new one generated from debug info produces the same
debug info.

Pahole also can be used to use all this type information to pretty print raw data
according to command line directions.

Headers can have its data format described from debugging info and offsets from
it can be used to further format a number of records.

The btfdiff utility compares the output of pahole from BTF and DWARF to make
sure they produce the same results.

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Update Information:

New release: v1.20
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ChangeLog:

* Tue Feb  2 2021 Arnaldo Carvalho de Melo  - 1.20-1
- New release: v1.20
- btf_encoder:
- Improve ELF error reporting using elf_errmsg(elf_errno())
- Improve objcopy error handling.
- Fix handling of 'restrict' qualifier, that was being treated as a 'const'.
- Support SHN_XINDEX in st_shndx symbol indexes
- Cope with functions without a name
- Fix BTF variable generation for kernel modules
- Fix address size to match what is in the ELF file being processed.
- Use kernel module ftrace addresses when finding which functions to encode.
- libbpf:
- Allow use of packaged version.
- dwarf_loader:
- Support DW_AT_data_bit_offset
- DW_FORM_implicit_const in attr_numeric() and attr_offset()
- Support DW_TAG_GNU_call_site, standardized rename of DW_TAG_GNU_call_site.
- build:
- Fix compilation on 32-bit architectures.
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References:

[ 1 ] Bug #1922698 - many DW_TAG_INVALID errors
        https://bugzilla.redhat.com/show_bug.cgi?id=1922698
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-804e7a572c' at the command
line. For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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