mirror of
git://sourceware.org/git/libabigail.git
synced 2024-12-17 07:24:34 +00:00
The Git repository of the Libabigail Project
ca08bae742
An anonymous struct/union is, by definition an entity that is not
named (unless a naming typedef is provided for it).
It turns out that in C++ binaries, there are anonymous types that are
logically equivalent (as far as ABI is concerned) because they have
the same members and layout, but turn out to be evaluated as being
different because they are defined in different name spaces. And
because they are not named, showing them as being different just
because of their name space doesn't bring anything but spurious error
reporting.
Consider the DWARF representing this:
struct S
{
union
{
int a;
int b;
} member;
};
where the 'member' is of type S::<anonymous-union>.
Probably due to LTO, we see some DWARF that represents the type of
'member' as just <anonymous-union>, in some translation units.
I could not generate that DWARF from a small test case, myself. But
it comes from the binary 'usr/bin/lto-dump', from the
https://bugzilla.redhat.com/show_bug.cgi?id=1925886 problem report.
So in that case, we want the S::<anonymous-union> to compare equal to
the <anonymous-union>, otherwise, this produces spurious type changes,
especially when doing self comparison.
This is what this patch does.
* include/abg-fwd.h (is_anonymous_type): Constify this function.
* src/abg-ir.cc (equals): In the overload for decl_base, do not
take scope of anonymous types into account. In the overload for
array_type_def do not peel of typedefs. This is not directly
related to anonymous types, but it make comparison more robust
against naming typedefs used for anonymous types in array
elements.
(get_type_name): Do not take into account the scope of anonymous
types when building internal representation of types. Note that
the internal representation is what is used for canonicalization.
This means that all anonymous types are compared against each
others during type canonicalization.
* src/abg-reader.cc (build_class_decl): Do not try to re-use
anonymous types, just like we already do for DWARF.
* tests/data/test-annotate/test17-pr19027.so.abi: Adjust.
* tests/data/test-annotate/test18-pr19037-libvtkRenderingLIC-6.1.so.abi:
Likewise.
* tests/data/test-annotate/test19-pr19023-libtcmalloc_and_profiler.so.abi:
Likewise.
* tests/data/test-diff-filter/test31-pr18535-libstdc++-report-0.txt:
Likewise.
* tests/data/test-diff-filter/test31-pr18535-libstdc++-report-1.txt:
Likewise.
* tests/data/test-read-dwarf/PR22122-libftdc.so.abi: Likewise.
* tests/data/test-read-dwarf/test-libaaudio.so.abi: Likewise.
* tests/data/test-read-dwarf/test-libandroid.so.abi: Likewise.
* tests/data/test-read-dwarf/test10-pr18818-gcc.so.abi: Likewise.
* tests/data/test-read-dwarf/test11-pr18828.so.abi: Likewise.
* tests/data/test-read-dwarf/test12-pr18844.so.abi: Likewise.
* tests/data/test-read-dwarf/test16-pr18904.so.abi: Likewise.
* tests/data/test-read-dwarf/test17-pr19027.so.abi: Likewise.
* tests/data/test-read-dwarf/test18-pr19037-libvtkRenderingLIC-6.1.so.abi:
Likewise.
* tests/data/test-read-dwarf/test19-pr19023-libtcmalloc_and_profiler.so.abi:
Likewise.
* tests/data/test-read-dwarf/test22-pr19097-libstdc++.so.6.0.17.so.abi:
Likewise.
* tests/data/test-read-dwarf/test9-pr18818-clang.so.abi: Likewise.
Signed-off-by: Dodji Seketeli <dodji@redhat.com>
|
||
|---|---|---|
| autoconf-archive | ||
| bash-completion | ||
| doc | ||
| include | ||
| m4 | ||
| relicensing-scripts | ||
| scripts | ||
| src | ||
| tests | ||
| tools | ||
| .clang-format | ||
| .gitignore | ||
| abigail.m4 | ||
| 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 | ||
| 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, fonctions 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.