f3ddd6929a
This patch implements the protection of stack variables. It lays out stack variables as well as the different red zones, emits some prologue code to populate the shadow memory as to poison (mark as non-accessible) the regions of the red zones and mark the regions of stack variables as accessible, and emit some epilogue code to un-poison (mark as accessible) the regions of red zones right before the function exits. * Makefile.in (asan.o): Depend on $(EXPR_H) $(OPTABS_H). (cfgexpand.o): Depend on asan.h. * asan.c: Include expr.h and optabs.h. (asan_shadow_set): New variable. (asan_shadow_cst, asan_emit_stack_protection): New functions. (asan_init_shadow_ptr_types): Initialize also asan_shadow_set. * cfgexpand.c: Include asan.h. Define HOST_WIDE_INT heap vector. (partition_stack_vars): If i is large alignment and j small alignment or vice versa, break out of the loop instead of continue, and put the test earlier. If flag_asan, break out of the loop if for small alignment size is different. (struct stack_vars_data): New type. (expand_stack_vars): Add DATA argument. Change PRED type to function taking size_t argument instead of tree. Adjust pred calls. Fill DATA in and add needed padding in between variables if -faddress-sanitizer. (defer_stack_allocation): Defer everything for flag_asan. (stack_protect_decl_phase_1, stack_protect_decl_phase_2): Take size_t index into stack_vars array instead of the decl directly. (asan_decl_phase_3): New function. (expand_used_vars): Return var destruction sequence. Adjust expand_stack_vars calls, add another one for flag_asan. Call asan_emit_stack_protection if expand_stack_vars added anything to the vectors. (expand_gimple_basic_block): Add disable_tail_calls argument. (gimple_expand_cfg): Pass true to it if expand_used_vars returned non-NULL. Emit the sequence returned by expand_used_vars after return_label. * asan.h (asan_emit_stack_protection): New prototype. (asan_shadow_set): New decl. (ASAN_RED_ZONE_SIZE, ASAN_STACK_MAGIC_LEFT, ASAN_STACK_MAGIC_MIDDLE, ASAN_STACK_MAGIC_RIGHT, ASAN_STACK_FRAME_MAGIC): Define. (asan_protect_stack_decl): New inline. * toplev.c (process_options): Also disable -faddress-sanitizer on !FRAME_GROWS_DOWNWARDS targets. From-SVN: r193436 |
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| boehm-gc | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libjava | ||
| libmudflap | ||
| libobjc | ||
| libquadmath | ||
| libssp | ||
| libstdc++-v3 | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| ABOUT-NLS | ||
| ChangeLog | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| README | ||
| symlink-tree | ||
| 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.