-------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2025-ef65eaa542 2025-02-01 08:06:36.966096+00:00 -------------------------------------------------------------------------------- Name : dwarves Product : Fedora 40 Version : 1.29 Release : 1.fc40 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. -------------------------------------------------------------------------------- Update Information: Multithreading is now in the DWARF loader using a jobs queue and a pool of worker threads. New release: v1.27 -------------------------------------------------------------------------------- ChangeLog: * Wed Jan 15 2025 Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> - 1.29-1 - Multithreading is now in the DWARF loader using a jobs queue and a pool of worker threads. - The BTF encoding now is always reproducible, and as fast/faster than before. - The memory consumption is reduced. - Support for multiple BTF_DECL_TAGs pointing to same tag. - Verify that pfunct prints btf_decl_tags read from BTF. - Don't print functions twice when using 'pfunct -f function_name'. * Tue Jun 11 2024 Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> - 1.27-1 - New release: v1.27 - Reproducible parallel builds: multiple runs with different number of loading/encoding threads produce the same result. - Inject kfunc decl tags into BTF from the BTF IDs ELF section in the Linux kernel vmlinux file. - Sanitize unsupported DWARF int type with greater-than-16 byte, as BTF doesn't support it. - Initial support for BTF_KIND_DECL_TAG in the BTF loader, adding support in pfunct output. - Fix hole discovery with inheritance in C++. -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-ef65eaa542' 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 -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list -- package-announce@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to package-announce-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/package-announce@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
