aboutsummaryrefslogtreecommitdiff
path: root/gcc/builtins.h
diff options
context:
space:
mode:
authorMartin Sebor <msebor@redhat.com>2017-11-10 16:35:26 +0000
committerMartin Sebor <msebor@gcc.gnu.org>2017-11-10 09:35:26 -0700
commit025d57f037ad13eb479818b677ef4be4d97b639c (patch)
tree28c279950fb42d8f67b86b9a2193b3acc6a669f2 /gcc/builtins.h
parente89ce41dbab07a9acafd900a3ab57eeb5d499276 (diff)
downloadgcc-025d57f037ad13eb479818b677ef4be4d97b639c.zip
gcc-025d57f037ad13eb479818b677ef4be4d97b639c.tar.gz
gcc-025d57f037ad13eb479818b677ef4be4d97b639c.tar.bz2
PR c/81117 - Improve buffer overflow checking in strncpy
gcc/ChangeLog: PR c/81117 * builtins.c (compute_objsize): Handle arrays that compute_builtin_object_size likes to fail for. Make extern. * builtins.h (compute_objsize): Declare. (check_strncpy_sizes): New function. (expand_builtin_strncpy): Call check_strncpy_sizes. * gimple-fold.c (gimple_fold_builtin_strncpy): Implement -Wstringop-truncation. (gimple_fold_builtin_strncat): Same. * gimple.c (gimple_build_call_from_tree): Set call location. * tree-ssa-strlen.c (strlen_to_stridx): New global variable. (maybe_diag_bound_equal_length, is_strlen_related_p): New functions. (handle_builtin_stxncpy, handle_builtin_strncat): Same. (handle_builtin_strlen): Use strlen_to_stridx. (strlen_optimize_stmt): Handle flavors of strncat, strncpy, and stpncpy. Use strlen_to_stridx. (pass_strlen::execute): Release strlen_to_stridx. * doc/invoke.texi (-Wsizeof-pointer-memaccess): Document enhancement. (-Wstringop-truncation): Document new option. gcc/ada/ChangeLog: PR c/81117 * ada/adadecode.c (__gnat_decode): Use memcpy instead of strncpy. * ada/argv.c (__gnat_fill_arg, __gnat_fill_env): Same. gcc/c-family/ChangeLog: PR c/81117 * c-common.c (catenate_strings): Use memcpy instead of strncpy. * c-warn.c (sizeof_pointer_memaccess_warning): Handle arrays. * c.opt (-Wstringop-truncation): New option. gcc/fortran/ChangeLog: PR c/81117 * gcc/fortran/decl.c (build_sym): Use strcpy instead of strncpy. gcc/objc/ChangeLog: PR c/81117 * objc-encoding.c (encode_type): Use memcpy instead of strncpy. gcc/testsuite/ChangeLog: PR c/81117 * c-c++-common/Wsizeof-pointer-memaccess3.c: New test. * c-c++-common/Wstringop-overflow.c: Same. * c-c++-common/Wstringop-truncation.c: Same. * c-c++-common/Wsizeof-pointer-memaccess2.c: Adjust. * c-c++-common/attr-nonstring-2.c: New test. * g++.dg/torture/Wsizeof-pointer-memaccess1.C: Adjust. * g++.dg/torture/Wsizeof-pointer-memaccess2.C: Same. * gcc.dg/torture/pr63554.c: Same. * gcc.dg/Walloca-1.c: Disable macro tracking. From-SVN: r254630
Diffstat (limited to 'gcc/builtins.h')
-rw-r--r--gcc/builtins.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/builtins.h b/gcc/builtins.h
index 4ae7056..cf3fc17 100644
--- a/gcc/builtins.h
+++ b/gcc/builtins.h
@@ -89,6 +89,7 @@ extern tree fold_call_stmt (gcall *, bool);
extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
extern bool is_simple_builtin (tree);
extern bool is_inexpensive_builtin (tree);
+extern tree compute_objsize (tree, int);
extern bool readonly_data_expr (tree exp);
extern bool init_target_chars (void);