Re: RFT: coverage analysis and lots more regression tests in the 'next' branch. Was: Re: [PATCH v2 0/9] pahole: Support cross-CU type references and dwz alternate debug files

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Sun, Aug 30, 2026 at 06:08:49PM +0100, Alan Maguire wrote:
> On 29/08/2026 21:21, Arnaldo Carvalho de Melo wrote:
> > On Fri, Aug 28, 2026 at 07:59:24PM -0300, Arnaldo Carvalho de Melo wrote:
> >> I'm now in the process of cherry picking non-Rust related patches,
> >> things that don't touch the .c files in the tree, just adding coverage
> >> analysis, tons of tests and scripts for helping us do bisection tests,
> >> etc.
  
> >> I just pushed out the first batch to the next branch, I invite people to
> >> try it and report results, it should help us to catch problems sooner by
> >> testing most of the paths in the codebase, which is super important
> >> these days where we are having (or will have) tons of patches being
> >> submitted.

> > Got all of the coverage analysis and new regression tests on the next
> > branch, and run the 'build-and-test.sh' script on my set of containers,
> > where all the test ran on:
 
> This looks fantastic! I ran it thru CI: 

Yeah, lots of tests, some simple, some more involved, and several
scripts to help in development, like the one for test build after a
range of patches :-)
 
> https://github.com/alan-maguire/dwarves/actions/runs/33255515875
 
> Let's get the coverage report enabled as part of CI too..

Right, taking a look at it before after patches seems like a good way to
notice the need for further tests to cover new code or further test
existing one.

Since it sat there for a couple days and you run it throug CI and it
passed, I'm moving it from next to master, I still have some branches to
merge but will concentrate on the rust patches as we need to experiment
for our talk at LPC, but will do it in a separate development branch,
leaving what is in master for a few more days to then cut 1.32, as there
are requests from at least Fedora for a new release as users are needing
features that are post 1.31.

Thanks for testing it!

- Arnaldo
 
> > 
> > toolsbuilder@five:~$ cat dm.log/summary
> > Subject: tools build test for http://192.168.86.5/pahole/dwarves-1.31.tar.xz build-and-test-cmd.sh
> > 
> >    1    78.93 almalinux:8                   : Ok   gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-28) , clang version 21.1.8 ( 21.1.8-1.module_el8.10.0+4172+b6b13d75) flex 2.6.1
> >    2   158.15 almalinux:9                   : Ok   gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-14) , clang version 21.1.8 (AlmaLinux OS Foundation 21.1.8-2.el9) flex 2.6.4
> >    3    36.95 almalinux:9-i386              : Ok   gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-14) , clang version 21.1.8 (AlmaLinux OS Foundation 21.1.8-2.el9) flex 2.6.4
> >    4   167.45 almalinux:10                  : Ok   gcc (GCC) 14.3.1 20251022 (Red Hat 14.3.1-4) , clang version 21.1.8 (AlmaLinux OS Foundation 21.1.8-1.el10.alma.1) flex 2.6.4
> >    5   293.08 alpine:3.22                   : Ok   gcc (Alpine 14.2.0) 14.2.0 , Alpine clang version 20.1.8 flex 2.6.4
> >    6   289.06 alpine:3.23                   : Ok   gcc (Alpine 15.2.0) 15.2.0 , Alpine clang version 21.1.2 flex 2.6.4
> >    7   255.51 alpine:3.24                   : Ok   gcc (Alpine 15.2.0) 15.2.0 , Alpine clang version 22.1.3 flex 2.6.4
> >    8   262.55 alpine:edge                   : Ok   gcc (Alpine 15.2.0) 15.2.0 , Alpine clang version 22.1.8 flex 2.6.4
> >    9   152.16 amazonlinux:2023              : Ok   gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-5) , clang version 15.0.7 (AWS 15.0.7-3.amzn2023.0.4) flex 2.6.4
> >   10   152.38 amazonlinux:devel             : Ok   gcc (GCC) 11.3.1 20221121 (Red Hat 11.3.1-4) , clang version 15.0.6 (Amazon Linux 15.0.6-3.amzn2023.0.2) flex 2.6.4
> >   11   171.22 archlinux:base                : Ok   gcc (GCC) 16.2.1 20260810 , clang version 22.1.8 flex 2.6.4
> >   12   160.21 centos:stream                 : Ok   gcc (GCC) 14.4.1 20260724 (Red Hat 14.4.1-2) , clang version 22.1.8 (CentOS 22.1.8-1.el10) flex 2.6.4
> >   13    77.34 debian:11                     : Ok   gcc (Debian 10.2.1-6) 10.2.1 20210110 , Debian clang version 13.0.1-6~deb11u1 flex 2.6.4
> >   14   154.23 debian:12                     : Ok   gcc (Debian 12.2.0-14+deb12u1) 12.2.0 , Debian clang version 14.0.6 flex 2.6.4
> >   15   157.32 debian:13                     : Ok   gcc (Debian 14.2.0-19) 14.2.0 , Debian clang version 19.1.7 (3+b1) flex 2.6.4
> >   16   156.96 debian:experimental           : Ok   gcc (Debian 16.1.0-3) 16.1.0 , Debian clang version 21.1.8 (10) flex 2.6.4
> >   17   157.12 fedora:40                     : Ok   gcc (GCC) 14.2.1 20240912 (Red Hat 14.2.1-3) , clang version 18.1.8 (Fedora 18.1.8-2.fc40) flex 2.6.4
> >   18   158.62 fedora:41                     : Ok   gcc (GCC) 14.3.1 20251022 (Red Hat 14.3.1-4) , clang version 19.1.7 (Fedora 19.1.7-5.fc41) flex 2.6.4
> >   19   161.74 fedora:42                     : Ok   gcc (GCC) 15.2.1 20260123 (Red Hat 15.2.1-7) , clang version 20.1.8 (Fedora 20.1.8-4.fc42) flex 2.6.4
> >   20   160.37 fedora:43                     : Ok   gcc (GCC) 15.3.1 20260722 (Red Hat 15.3.1-1) , clang version 21.1.8 (Fedora 21.1.8-6.fc43) flex 2.6.4
> >   21   239.67 fedora:44                     : Ok   gcc (GCC) 16.2.1 20260819 (Red Hat 16.2.1-2) , clang version 22.1.8 (Fedora 22.1.8-4.fc44) flex 2.6.4
> >   22   238.08 fedora:45                     : Ok   gcc (GCC) 16.2.1 20260819 (Red Hat 16.2.1-2) , clang version 22.1.8 (Fedora 22.1.8-20.fc45) flex 2.6.4
> >   23   170.21 fedora:rawhide                : Ok   gcc (GCC) 16.1.1 20260703 (Red Hat 16.1.1-4) , clang version 22.1.8 (Fedora 22.1.8-20.fc45) flex 2.6.4
> >   24    89.22 gentoo:stage3                 : Ok   gcc (Gentoo 15.3.0 p8) 15.3.0  flex 2.6.4
> >   25   166.60 manjaro:base                  : Ok   gcc (GCC) 16.1.1 20260625 , clang version 22.1.6 flex 2.6.4
> >   26   172.84 opensuse:16.0                 : Ok   gcc (SUSE Linux) 15.3.0 , clang version 19.1.7 flex 2.6.4
> >   27   166.50 opensuse:tumbleweed           : Ok   gcc (SUSE Linux) 15.3.0 , clang version 22.1.8 flex 2.6.4
> >   28    80.73 oraclelinux:8                 : Ok   gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-28.0.1) , clang version 21.1.8 ( 21.1.8-1.module+el8.10.0+90887+a5269809) flex 2.6.1
> >   29   162.06 oraclelinux:9                 : Ok   gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-14.0.1) , clang version 21.1.8 ( 21.1.8-2.el9) flex 2.6.4
> >   30   164.88 oraclelinux:10                : Ok   gcc (GCC) 14.3.1 20251022 (Red Hat 14.3.1-4.0.1) , clang version 21.1.8 (Oracle America 21.1.8-1.el10) flex 2.6.4
> >   31    82.10 rockylinux:8                  : Ok   gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-28) , clang version 21.1.8 (RESF 21.1.8-1.module+el8.10.0+40180+8e26bdb3) flex 2.6.1
> >   32   162.01 rockylinux:9                  : Ok   gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-14) , clang version 21.1.8 (RESF 21.1.8-2.el9) flex 2.6.4
> >   33   166.23 rockylinux:10                 : Ok   gcc (GCC) 14.3.1 20251022 (Red Hat 14.3.1-4) , clang version 21.1.8 (RESF 21.1.8-1.el10) flex 2.6.4
> >   34   169.75 ubuntu:22.04                  : Ok   gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0 , Ubuntu clang version 14.0.0-1ubuntu1.1 flex 2.6.4
> >   35   162.24 ubuntu:24.04                  : Ok   gcc (Ubuntu 13.3.0-6ubuntu2~24.04.1) 13.3.0 , Ubuntu clang version 18.1.3 (1ubuntu1) flex 2.6.4
> >   36   162.16 ubuntu:25.04                  : Ok   gcc (Ubuntu 14.2.0-19ubuntu2) 14.2.0 , Ubuntu clang version 20.1.2 (0ubuntu1) flex 2.6.4
> >   37   161.96 ubuntu:25.10                  : Ok   gcc (Ubuntu 15.2.0-4ubuntu4) 15.2.0 , Ubuntu clang version 20.1.8 (0ubuntu4) flex 2.6.4
> >   38   163.52 ubuntu:26.04                  : Ok   gcc (Ubuntu 15.2.0-16ubuntu1) 15.2.0 , Ubuntu clang version 21.1.8 (6ubuntu1) flex 2.6.4
> > BUILD_TARBALL_HEAD=eeb6956261d2fbe71715f0633a68fdc840b5f5ce
> > 39 6242.1
> > toolsbuilder@five:~$
> > 
> > For instance:
> > 
> > toolsbuilder@five:~$ cat dm.log/fedora\:rawhide 
> > fedora:rawhide
> > Downloading http://192.168.86.5/pahole/dwarves-1.31.tar.xz...
> >   % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
> >                                  Dload  Upload  Total   Spent   Left   Speed
> > 100  2.34M 100  2.34M   0      0 530.8M      0                              0
> > dwarves-1.31/config.h.cmake
> > dwarves-1.31/btfdiff
> > <SNIP>
> > dwarves-1.31/tests/typedef_chain.sh
> > dwarves-1.31/tests/.test-times.seed
> > dwarves-1.31/HEAD
> > BUILD_TARBALL_HEAD=eeb6956261d2fbe71715f0633a68fdc840b5f5ce
> > Using built-in specs.
> > COLLECT_GCC=gcc
> > COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/16/lto-wrapper
> > OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
> > OFFLOAD_TARGET_DEFAULT=1
> > Target: x86_64-redhat-linux
> > Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,m2,cobol,algol68,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugzilla.redhat.com/ --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --enable-libstdcxx-backtrace --with-libstdcxx-zoneinfo=/usr/share/zoneinfo --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl=/builddir/build/BUILD/gcc-16.1.1-build/gcc-16.1.1-20260703/obj-x86_64-redhat-linux/isl-install --enable-offload-targets=nvptx-none,amdgcn-amdhsa --enable-offload-defaulted --without-cuda-driver --enable-gnu-indirect-function --enable-cet --with-tune=generic --with-tls=gnu2 --with-arch_32=i686 --build=x86_64-redhat-linux --with-build-config=bootstrap-lto --enable-link-serialization=1 --disable-libssp
> > Thread model: posix
> > Supported LTO compression algorithms: zlib zstd
> > gcc version 16.1.1 20260703 (Red Hat 16.1.1-4) (GCC) 
> > -- The C compiler identification is GNU 16.1.1
> > -- Detecting C compiler ABI info
> > -- Detecting C compiler ABI info - done
> > -- Check for working C compiler: /usr/bin/cc - skipped
> > -- Detecting C compile features
> > -- Detecting C compile features - done
> > -- Setting BUILD_SHARED_LIBS = ON
> > -- Checking availability of DWARF and ELF development libraries
> > -- Looking for dwfl_module_build_id in elf
> > -- Looking for dwfl_module_build_id in elf - found
> > -- Found dwarf.h header: /usr/include
> > -- Found elfutils/libdw.h header: /usr/include
> > -- Found libdw library: /usr/lib64/libdw.so
> > -- Found libelf library: /usr/lib64/libelf.so
> > -- Checking availability of DWARF and ELF development libraries - done
> > -- Found ZLIB: /usr/lib64/libz.so (found version "1.3.1")
> > -- Checking availability of argp library
> > -- Assuming argp is in libc
> > -- Checking availability of argp library - done
> > -- Checking availability of obstack library
> > -- Assuming obstack is in libc
> > -- Checking availability of obstack library - done
> > -- Version: v1.31-tarball-g416753b4ba90 (from HEAD file)
> > -- Performing Test HAVE_REALLOCARRAY_SUPPORT
> > -- Performing Test HAVE_REALLOCARRAY_SUPPORT - Success
> > -- Configuring done (0.6s)
> > -- Generating done (0.0s)
> > -- Build files have been written to: /git/dwarves-1.31/build
> > make: Entering directory '/git/dwarves-1.31/build'
> > [  1%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/btf.c.o
> > [  3%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/features.c.o
> > [  5%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/bpf.c.o
> > [  8%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/btf_relocate.c.o
> > [  8%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/btf_dump.c.o
> > [ 10%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/hashmap.c.o
> > [ 13%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/bpf_prog_linfo.c.o
> > [ 13%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/libbpf.c.o
> > [ 15%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/libbpf_probes.c.o
> > [ 18%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/libbpf_utils.c.o
> > [ 20%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/linker.c.o
> > [ 20%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/btf_iter.c.o
> > [ 22%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/elf.c.o
> > [ 24%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/gen_loader.c.o
> > [ 25%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/netlink.c.o
> > [ 27%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/nlattr.c.o
> > [ 29%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/ringbuf.c.o
> > [ 31%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/relo_core.c.o
> > [ 32%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/usdt.c.o
> > [ 36%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/strset.c.o
> > [ 36%] Building C object CMakeFiles/bpf.dir/lib/bpf/src/zip.c.o
> > [ 36%] Built target bpf
> > [ 39%] Building C object CMakeFiles/dwarves.dir/dwarves.c.o
> > [ 39%] Building C object CMakeFiles/dwarves.dir/dwarves_fprintf.c.o
> > [ 43%] Building C object CMakeFiles/dwarves.dir/rbtree.c.o
> > [ 43%] Building C object CMakeFiles/dwarves.dir/libctf.c.o
> > [ 46%] Building C object CMakeFiles/dwarves.dir/ctf_loader.c.o
> > [ 48%] Building C object CMakeFiles/dwarves.dir/gobuffer.c.o
> > [ 51%] Building C object CMakeFiles/dwarves.dir/btf_loader.c.o
> > [ 51%] Building C object CMakeFiles/dwarves.dir/elf_symtab.c.o
> > [ 48%] Building C object CMakeFiles/dwarves.dir/btf_encoder.c.o
> > [ 53%] Building C object CMakeFiles/dwarves.dir/dwarf_loader.c.o
> > [ 55%] Building C object CMakeFiles/dwarves.dir/dutil.c.o
> > [ 56%] Linking C shared library libdwarves.so
> > [ 56%] Built target dwarves
> > [ 60%] Building C object CMakeFiles/syscse.dir/syscse.c.o
> > [ 62%] Building C object CMakeFiles/dtagnames.dir/dtagnames.c.o
> > [ 65%] Building C object CMakeFiles/prefcnt.dir/prefcnt.c.o
> > [ 65%] Building C object CMakeFiles/dwarves_emit.dir/dwarves_emit.c.o
> > [ 72%] Building C object CMakeFiles/scncopy.dir/scncopy.c.o
> > [ 68%] Building C object CMakeFiles/pglobal.dir/pglobal.c.o
> > [ 62%] Building C object CMakeFiles/pdwtags.dir/pdwtags.c.o
> > [ 72%] Building C object CMakeFiles/dwarves_reorganize.dir/dwarves_reorganize.c.o
> > [ 68%] Building C object CMakeFiles/codiff.dir/codiff.c.o
> > [ 74%] Building C object CMakeFiles/scncopy.dir/elfcreator.c.o
> > [ 75%] Linking C executable dtagnames
> > [ 79%] Linking C executable pdwtags
> > [ 81%] Linking C executable syscse
> > [ 81%] Linking C executable prefcnt
> > [ 82%] Linking C executable pglobal
> > [ 84%] Linking C executable scncopy
> > [ 86%] Linking C shared library libdwarves_reorganize.so
> > [ 86%] Built target dtagnames
> > [ 86%] Built target pdwtags
> > [ 86%] Built target pglobal
> > [ 86%] Built target prefcnt
> > [ 86%] Built target syscse
> > [ 87%] Linking C shared library libdwarves_emit.so
> > [ 87%] Built target scncopy
> > [ 87%] Built target dwarves_reorganize
> > [ 87%] Built target dwarves_emit
> > [ 89%] Linking C executable codiff
> > [ 91%] Building C object CMakeFiles/pahole.dir/pahole.c.o
> > [ 93%] Building C object CMakeFiles/ctracer.dir/ctracer.c.o
> > [ 94%] Building C object CMakeFiles/pfunct.dir/pfunct.c.o
> > [ 94%] Built target codiff
> > [ 98%] Linking C executable ctracer
> > [ 98%] Linking C executable pfunct
> > [ 98%] Built target pfunct
> > [ 98%] Built target ctracer
> > [100%] Linking C executable pahole
> > [100%] Built target pahole
> > make: Leaving directory '/git/dwarves-1.31/build'
> > Testing pahole version:
> >   v1.31-tarball-g416753b4ba90
> > 
> > Verbose mode enabled - showing diagnostic information:
> >   Architecture: x86_64
> >   CPUs: 32
> >   Memory: 62.7 GB
> >   Swap: 8.0 GB
> >   Parallelism: unlimited (all tests run in parallel)
> >     Tip: On low-memory systems, use -j to limit parallelism (e.g., -j 4 or -j 1)
> >   Test artifacts: /tmp/pahole-tests/
> >   Compiler: gcc (GCC) 16.1.1 20260703 (Red Hat 16.1.1-4)
> >   libc: ldd (GNU libc) 2.44
> >   bpftool: bpftool v7.7.0
> >   VMLINUX: /tmp/vmlinux
> >   PERF_BIN: not set
> >   PERF_SRC_DIR: not set
> > 
> >   1: dwarves_emit.c: _Atomic type compile emission.                     : Ok
> >   2: _Atomic type display and --skip_emitting_atomic_typedefs.          : Ok
> >   3: Auxiliary tools: pglobal, prefcnt, dtagnames.                      : Ok
> >   4: Bitfield layout and data member filtering.                         : Ok
> >   5: dwarf_loader coverage: bitfields, templates, enums, inlines.       : Ok
> >   6: Bitfield typedef recoding (tag__recode_dwarf_bitfield).            : Ok
> >   7: BTF arena type tag encoding for kfuncs.                            : Ok
> >   8: BTF multi-dimensional array encoding and round-trip.               : Ok
> >   9: BTF bitfield encoding and loading round-trip.                      : Ok
> >  10: BTF VAR and DATASEC encoding for global variables.                 : Ok
> >  11: BTF deduplication of array types across CUs.                       : Ok
> >  12: Distilled base BTF generation.                                     : Ok
> >  13: BTF encoding options.                                              : Ok
> >  14: BTF encoder coverage.                                              : Ok
> >  15: Validation of BTF encoding of functions.                           : Ok
> >  16: BTF_KIND_FWD encoding and loading round-trip.                      : Ok
> >  17: BTF encoding with invalid symbol names.                            : Ok
> >  18: Split BTF encoding (vmlinux base + kernel module).                 : Skip (no loaded module with debuginfod-available debuginfo found)
> >  19: Check BTF type tag order.                                          : Ok
> >  20: BTF FLOAT and ENUM64 type encoding.                                : Ok
> >  21: BTF encoder verbose logging coverage.                              : Ok
> >  23: BTF encoding into ELF via pahole -J (btf_encoder__write_elf).      : Ok
> >  24: BTF true_signature: clang optimized aggregate parameters (2 structs: Ok
> >  25: BTF true_signature: clang optimized aggregate parameters (2 structs: Ok
> >  26: BTF true_signature: clang optimized with large union parameter     : Ok
> >  27: BTF true_signature: clang optimized parameters (scalar)            : Ok
> >  28: BTF true_signature: clang optimized with stack parameters (9 params: Ok
> >  29: BTF true_signature: clang optimized with stack parameters (non-stat: Ok
> >  30: Class name list from file.                                         : Ok
> >  31: CLI display and filtering options.                                 : Ok
> >  32: codiff struct comparison.                                          : Ok
> >  33: codiff coverage: terse, functions, verbose, multi-CU.              : Ok
> >  34: codiff member change coverage.                                     : Ok
> >  35: codiff multi-CU: __cus__find_cu_by_name coverage.                  : Ok
> >  36: Compilable output and type filtering.                              : Ok
> >  37: Type containment and pointer search.                               : Ok
> >  38: C++ namespace and using-declaration display.                       : Ok
> >  39: C++ variadic template parameter pack handling.                     : Ok
> >  40: Class name filtering.                                              : Ok
> >  41: Default BTF on a system without BTF.                               : Ok
> >  42: Display format options.                                            : Ok
> >  43: dwarf_loader.c edge cases: bitfield recode, inlining, call sites.  : Ok
> >  44: dwarves.c core API coverage.                                       : Ok
> >  45: DWZ alternate debug file type resolution.                          : Ok
> >  46: Atomic typedef emission.                                           : Ok
> >  47: Legacy atomic_ base type emission via --compile (hand-crafted DWARF: Ok
> >  48: dwarves_emit.c / dwarves_reorganize.c coverage.                    : Ok
> >  49: Enumerator search.                                                 : Ok
> >  50: Expand pointers option.                                            : Ok
> >  51: Type expansion and anonymous struct options.                       : Ok
> >  52: Flexible arrays accounting.                                        : Ok
> >  53: Validation of GCC optimized parameters in default BTF.             : Ok
> >  54: Validation of BTF encoding of true_signatures.                     : Skip (no optimizations applied.)
> >  56: Multi-file loading (cus__load_files).                              : Ok
> >  57: Version output.                                                    : Ok
> >  58: Header, range and seek_bytes prettify paths.                       : Ok
> >  59: pahole.c scattered option paths.                                   : Ok
> >  60: pdwtags DWARF tag display.                                         : Ok
> >  61: Check that pfunct can print btf_decl_tags read from BTF.           : Ok
> >  62: pfunct coverage: symtab, class, expand_types, compile.             : Ok
> >  63: pfunct function statistics.                                        : Ok
> >  64: pglobal basic: variables, functions, static exclusion.             : Ok
> >  65: prefcnt.c: reference counting coverage.                            : Ok
> >  68: Cacheline boundary display with large structs.                     : Ok
> >  70: Sizes and holes display.                                           : Ok
> >  71: Small files coverage: elf_symtab, gobuffer, dutil, pglobal.        : Ok
> >  72: Sort output and separator.                                         : Ok
> >  73: Typedef chain display.                                             : Ok
> >  55: Compare parallel vs merged CU loading for inter-CU type references.: Ok    
> >  66: Pretty printing of files using DWARF type information.             : Ok    
> >  67: Prototype expression parsing and prettify.                         : Ok
> >  69: Parallel reproducible DWARF Loading/Serial BTF encoding.           : Ok    
> >  22: BTF encoding on vmlinux.                                           : Ok    
> > Saved timing data to .test-times (73 tests)
> > 
> > + '[' ']'
> > + set +o xtrace
> > clang version 22.1.8 (Fedora 22.1.8-20.fc45)
> > Target: x86_64-redhat-linux-gnu
> > Thread model: posix
> > InstalledDir: /usr/bin
> > Configuration file: /etc/clang/x86_64-redhat-linux-gnu-clang.cfg
> > System configuration file directory: /etc/clang/
> > Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/16
> > Selected GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/16
> > Candidate multilib: .;@m64
> > Candidate multilib: 32;@m32
> > Selected multilib: .;@m64
> > mkdir: cannot create directory 'build': File exists
> > -- Setting BUILD_SHARED_LIBS = ON
> > -- Checking availability of DWARF and ELF development libraries
> > -- Checking availability of DWARF and ELF development libraries - done
> > -- Checking availability of argp library
> > -- Assuming argp is in libc
> > -- Checking availability of argp library - done
> > -- Checking availability of obstack library
> > -- Assuming obstack is in libc
> > -- Checking availability of obstack library - done
> > -- Version: v1.31-tarball-g416753b4ba90 (from HEAD file)
> > -- Configuring done (0.1s)
> > -- Generating done (0.0s)
> > -- Build files have been written to: /git/dwarves-1.31/build
> > make: Entering directory '/git/dwarves-1.31/build'
> > [ 36%] Built target bpf
> > [ 56%] Built target dwarves
> > [ 65%] Built target dwarves_reorganize
> > [ 67%] Built target dwarves_emit
> > [ 67%] Built target dtagnames
> > [ 70%] Built target codiff
> > [ 74%] Built target pdwtags
> > [ 77%] Built target pglobal
> > [ 82%] Built target scncopy
> > [ 86%] Built target syscse
> > [ 89%] Built target prefcnt
> > [ 93%] Built target ctracer
> > [ 96%] Built target pfunct
> > [100%] Built target pahole
> > make: Leaving directory '/git/dwarves-1.31/build'
> > Testing pahole version:
> >   v1.31-tarball-g416753b4ba90
> > 
> > Verbose mode enabled - showing diagnostic information:
> >   Architecture: x86_64
> >   CPUs: 32
> >   Memory: 62.7 GB
> >   Swap: 8.0 GB
> >   Parallelism: unlimited (all tests run in parallel)
> >     Tip: On low-memory systems, use -j to limit parallelism (e.g., -j 4 or -j 1)
> >   Test artifacts: /tmp/pahole-tests/
> >   Compiler: clang version 22.1.8 (Fedora 22.1.8-20.fc45)
> >   libc: ldd (GNU libc) 2.44
> >   bpftool: bpftool v7.7.0
> >   VMLINUX: /tmp/vmlinux
> >   PERF_BIN: not set
> >   PERF_SRC_DIR: not set
> > 
> >   1: dwarves_emit.c: _Atomic type compile emission.                     : Ok
> >   2: _Atomic type display and --skip_emitting_atomic_typedefs.          : Ok
> >   3: Auxiliary tools: pglobal, prefcnt, dtagnames.                      : Ok
> >   4: Bitfield layout and data member filtering.                         : Ok
> >   5: dwarf_loader coverage: bitfields, templates, enums, inlines.       : Ok
> >   6: Bitfield typedef recoding (tag__recode_dwarf_bitfield).            : Ok
> >   7: BTF arena type tag encoding for kfuncs.                            : Ok
> >   8: BTF multi-dimensional array encoding and round-trip.               : Ok
> >   9: BTF bitfield encoding and loading round-trip.                      : Ok
> >  10: BTF VAR and DATASEC encoding for global variables.                 : Ok
> >  11: BTF deduplication of array types across CUs.                       : Ok
> >  12: Distilled base BTF generation.                                     : Ok
> >  13: BTF encoding options.                                              : Ok
> >  14: BTF encoder coverage.                                              : Ok
> >  15: Validation of BTF encoding of functions.                           : Ok
> >  16: BTF_KIND_FWD encoding and loading round-trip.                      : Ok
> >  17: BTF encoding with invalid symbol names.                            : Ok
> >  18: Split BTF encoding (vmlinux base + kernel module).                 : Skip (no loaded module with debuginfod-available debuginfo found)
> >  19: Check BTF type tag order.                                          : Ok
> >  20: BTF FLOAT and ENUM64 type encoding.                                : Ok
> >  21: BTF encoder verbose logging coverage.                              : Ok
> >  22: BTF encoding into ELF via pahole -J (btf_encoder__write_elf).      : Ok
> >  23: BTF true_signature: clang optimized aggregate parameters (2 structs: Ok
> >  24: BTF true_signature: clang optimized aggregate parameters (2 structs: Ok
> >  25: BTF true_signature: clang optimized with large union parameter     : Ok
> >  26: BTF true_signature: clang optimized parameters (scalar)            : Ok
> >  27: BTF true_signature: clang optimized with stack parameters (9 params: Ok
> >  28: BTF true_signature: clang optimized with stack parameters (non-stat: Ok
> >  29: Class name list from file.                                         : Ok
> >  30: CLI display and filtering options.                                 : Ok
> >  31: codiff struct comparison.                                          : Ok
> >  32: codiff coverage: terse, functions, verbose, multi-CU.              : Ok
> >  33: codiff member change coverage.                                     : Ok
> >  34: codiff multi-CU: __cus__find_cu_by_name coverage.                  : Ok
> >  35: Compilable output and type filtering.                              : Ok
> >  36: Type containment and pointer search.                               : Ok
> >  37: C++ namespace and using-declaration display.                       : Ok
> >  38: C++ variadic template parameter pack handling.                     : Ok
> >  39: Class name filtering.                                              : Ok
> >  40: Default BTF on a system without BTF.                               : Ok
> >  41: Display format options.                                            : Ok
> >  42: dwarf_loader.c edge cases: bitfield recode, inlining, call sites.  : Ok
> >  43: dwarves.c core API coverage.                                       : Ok
> >  44: DWZ alternate debug file type resolution.                          : Ok
> >  45: Atomic typedef emission.                                           : Ok
> >  46: Legacy atomic_ base type emission via --compile (hand-crafted DWARF: Ok
> >  47: dwarves_emit.c / dwarves_reorganize.c coverage.                    : Ok
> >  48: Enumerator search.                                                 : Ok
> >  49: Expand pointers option.                                            : Ok
> >  50: Type expansion and anonymous struct options.                       : Ok
> >  51: Flexible arrays accounting.                                        : Ok
> >  52: Validation of GCC optimized parameters in default BTF.             : Ok
> >  53: Validation of BTF encoding of true_signatures.                     : Skip (no optimizations applied.)
> >  54: Multi-file loading (cus__load_files).                              : Ok
> >  55: Version output.                                                    : Ok
> >  56: Header, range and seek_bytes prettify paths.                       : Ok
> >  57: pahole.c scattered option paths.                                   : Ok
> >  58: pdwtags DWARF tag display.                                         : Ok
> >  59: Check that pfunct can print btf_decl_tags read from BTF.           : Ok
> >  60: pfunct coverage: symtab, class, expand_types, compile.             : Ok
> >  61: pfunct function statistics.                                        : Ok
> >  62: pglobal basic: variables, functions, static exclusion.             : Ok
> >  63: prefcnt.c: reference counting coverage.                            : Ok
> >  64: Cacheline boundary display with large structs.                     : Ok
> >  65: Sizes and holes display.                                           : Ok
> >  66: Small files coverage: elf_symtab, gobuffer, dutil, pglobal.        : Ok
> >  67: Sort output and separator.                                         : Ok
> >  68: Typedef chain display.                                             : Ok
> >  70: Compare parallel vs merged CU loading for inter-CU type references.: Ok
> >  71: Pretty printing of files using DWARF type information.             : Ok
> >  72: Prototype expression parsing and prettify.                         : Ok
> >  73: Parallel reproducible DWARF Loading/Serial BTF encoding.           : Ok    
> >  69: BTF encoding on vmlinux.                                           : Ok    
> > Saved timing data to .test-times (73 tests)
> > 
> > toolsbuilder@five:~$ 
> > 
> >