84e0549ce2
Any time somebody adds or removes an option in some *.opt file (which e.g. on the 10 branch after branching off 11 happened 7 times already), many offsets in global_options variable change and so plugins that ever access GCC options or other global_options values are ABI dependent on it. It is true we don't guarantee ABI stability for plugins, but we change the most often used data structures on the release branches only very rarely and so the options changes are the most problematic for ABI stability of plugins. Annobin uses a way to remap accesses to some of the global_options.x_* by looking them up in the cl_options array where we have offsetof (struct gcc_options, x_flag_lto) etc. remembered, but sadly doesn't do it for all options (e.g. some flag_* etc. option accesses may be hidden in various macros like POINTER_SIZE), and more importantly some struct gcc_options offsets are not covered at all. E.g. there is no offsetof (struct gcc_options, x_optimize), offsetof (struct gcc_options, x_flag_sanitize) etc. Those are usually: Variable int optimize in the *.opt files. The following patch allows the plugins to deal with reshuffling of even the global_options fields that aren't tracked in cl_options by adding another array that describes those, which adds an 816 bytes long array and 1039 bytes in string literals, so 1855 .rodata bytes in total ATM. And adds it only if --enable-plugin (the default), with --disable-plugin it will not be compiled in. 2020-11-18 Jakub Jelinek <jakub@redhat.com> * opts.h (struct cl_var): New type. (cl_vars): Declare. * optc-gen.awk: Generate cl_vars array. |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.