mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-02-26 13:55:52 +08:00
a44d7e8a52
This fixes an access to freed memory on the testcase from the PR. The problem comes from an invalid subroutine statement in an interface, which is ignored and causes the following statements forming the procedure body to be rejected. One of them use-associates the intrinsic ISO_C_BINDING module, which imports new symbols in a namespace that is freed at the time the statement is rejected. However, this creates dangling pointers as ISO_C_BINDING is special and its import creates a reference to the imported C_PTR symbol in the return type of the global intrinsic symbol for C_LOC (see the function create_intrinsic_function). This change saves and restores the list of use statements, so that rejected use statements are removed before they have a chance to be applied to the current namespace and create dangling pointers. PR fortran/107426 gcc/fortran/ChangeLog: * gfortran.h (gfc_save_module_list, gfc_restore_old_module_list): New declarations. * module.cc (old_module_list_tail): New global variable. (gfc_save_module_list, gfc_restore_old_module_list): New functions. (gfc_use_modules): Set module_list and old_module_list_tail. * parse.cc (next_statement): Save module_list before doing any work. (reject_statement): Restore module_list to its saved value. gcc/testsuite/ChangeLog: * gfortran.dg/pr89943_3.f90: Update error pattern. * gfortran.dg/pr89943_4.f90: Likewise. * gfortran.dg/use_31.f90: New test. |
||
|---|---|---|
| .github | ||
| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgm2 | ||
| libgo | ||
| libgomp | ||
| libgrust | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| 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 | ||
| SECURITY.txt | ||
| 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.