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The Git repository of the Libabigail Project
12641b1130
This adds support for the BTF debug information format. It provides a
new BTF front-end which can be instantiated by the function
tools::create_best_elf_based_reader().
For now, the BTF front-end supports the basic types (integers,
pointers, qualified types, typedefs, struct and unions and function
pointers) for functions and variables as emitted for the C language by
GCC. It seems to be able to support the BTF debug information emitted
for the vmlinux kernel by the pahole tool as well.
When configured with the --enable-btf option, the WITH_BTF
pre-processor macro is defined, enabling the BTF support. That option
is turned on by default if the /usr/include/bpf/btf.h header is found
on the system. To disable this, one can use the --disable-btf option.
The abidw and abidiff programs have been adapted to use the BTF
front-end when provided with the '--btf' option, or if BTF debug
information is the only one present in the binary.
* configure.ac: If the header /usr/include/bpf/btf.h exists, then
define the WITH_BTF pre-processor macro, unless --disable-btf was
provided.
* doc/manuals/abidiff.rst: Document the new --btf option.
* doc/manuals/abidw.rst: Likewise.
* doc/manuals/kmidiff.rst: Likewise.
* doc/manuals/abipkgdiff.rst: Likewise.
* include/abg-btf-reader.h: New header file. Contains the
declaration of the new btf::reader class.
* src/abg-btf-reader.cc: New source file. Contains the
definitions of the new btf::reader class.
* include/Makefile.am: Add the new include/abg-btf-reader.h header
file to source distribution.
* include/abg-corpus.h (enum origin): Add a new BTF_ORIGIN
enumerator.
* include/abg-tools-utils.h (file_has_btf_debug_info): Declare new
function.
* src/abg-tools-utils.cc (file_has_btf_debug_info): Define new
function.
(create_best_elf_based_reader): Adapt to support BTF input. If
the user requested the BTF front-end, instantiate it. Otherwise,
if the input file has only BTF debug info, instantiate the BTF
front end.
* include/abg-elf-reader.h (elf::reader::find_btf_section):
Declare new member function.
(elf::reader::{function, variable}_symbol_is_exported): Add new
overloads.
* src/abg-elf-reader.cc (reader::priv::btf_section): New data
member.
(reader::find_btf_section): Define new member function.
* src/Makefile.am: Add the new abg-ctf-reader.cc file to source
distribution.
* tools/abidw.cc (options::use_btf): New data member.
(display_usage): Add a help string for the new --btf option.
(parse_command_line): Support the new --btf option.
(load_corpus_and_write_abixml): If the user asked to use the btf
front-end then use that one.
* tools/abidiff.cc (options::use_btf): New data member.
(options::options): Initialize it.
(display_usage):: Add a help string to the new --btf options.
(parse_command_line): Support the new --btf options.
(main): If the user asked to use the btf front-end, then use that
one.
* tools/abidw.cc (options::use_btf): New data member.
(options::options): Initialize it.
(parse_command_line): Add a help string to the new --btf options.
(load_corpus_and_write_abixml): If the user asked to use the btf
front-end, then use that one.
* tools/kmidiff.cc (options::use_btf): New data member.
(options::options): Initialize it.
(display_usage): Add a help string to the new --btf options.
(parse_command_line): Add a help string to the new --btf options.
(main): If the user asked to use the btf front-end, then use that
one.
* tools/abipkgdiff.cc (options::use_btf): New data member.
(options::options): Initialize it.
(display_usage): Add a help string to the new --btf options.
(parse_command_line): Add a help string to the new --btf options.
(compare, compare_to_self)
(compare_prepared_linux_kernel_packages): If the user asked to use
the btf front-end, then use that one.
* tests/data/test-read-btf/test{0,1}.o: New binary test input
file.
* tests/data/test-read-btf/test{0,1}.c: Source code of the binary
input file above.
* tests/data/test-read-btf/test{0,1}.o.abi: Reference ABIXML
output.
* tests/data/test-abidiff-exit/btf/test0-report-{1,2}.txt: New
test reference output.
* tests/data/test-abidiff-exit/btf/test0-v{0,1}.o: New binary test
input.
* tests/data/test-abidiff-exit/btf/test0-v{0,1}.c: The source
files of the binary inputs above.
* tests/test-read-btf.cc: New test file to run the btf/abixml
tests.
* tests/Makefile.am: Add the new test files to the source
distribution.
Signed-off-by: Dodji Seketeli <dodji@redhat.com>
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| .github | ||
| autoconf-archive | ||
| bash-completion | ||
| doc | ||
| docker | ||
| include | ||
| m4 | ||
| relicensing-scripts | ||
| scripts | ||
| src | ||
| tests | ||
| tools | ||
| .clang-format | ||
| .gitignore | ||
| .mailmap | ||
| abigail.m4 | ||
| ABIXML-FORMAT-VERSIONS | ||
| AUTHORS | ||
| ChangeLog | ||
| COMMIT-LOG-GUIDELINES | ||
| COMPILING | ||
| configure.ac | ||
| CONTRIBUTING | ||
| default.abignore | ||
| gen-changelog.py | ||
| install-sh | ||
| libabigail.pc.in | ||
| license-change-2020.txt | ||
| LICENSE.txt | ||
| ltmain.sh | ||
| Makefile.am | ||
| NEWS | ||
| README | ||
| README-DOCKER.md | ||
| release-text-template.txt | ||
| update-copyright.sh | ||
| VISIBILITY | ||
This is the Application Binary Interface Generic Analysis and Instrumentation Library. It aims at constructing, manipulating, serializing and de-serializing ABI-relevant artifacts. The set of artifacts that we are intersted is made of quantities like types, variable, functions and declarations of a given library or program. For a given library or program this set of quantities is called an ABI corpus. This library aims at (among other things) providing a way to compare two ABI Corpora (apparently the plural of corpus is copora, heh, that's cool), provide detailed information about their differences, and help build tools to infer interesting conclusions about these differences. You are welcome to contribute to this project after reading the files CONTRIBUTING and COMMIT-LOG-GUIDELINES files in the source tree. Communicating with the maintainers of this project -- including sending patches to be include to the source code -- happens via email at libabigail@sourceware.org.