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| author | Martin Sebor <msebor@redhat.com> | 2017-11-21 20:01:58 +0000 |
|---|---|---|
| committer | Martin Sebor <msebor@gcc.gnu.org> | 2017-11-21 13:01:58 -0700 |
| commit | 6a33d0ff21e941fc3a65f23a753cc318aaae82b5 (patch) | |
| tree | b3eedddc82aa715ade9b6b34cd5163e5fd23b551 /gcc/calls.h | |
| parent | ab2c4ec8dcbe5d0b93d0250abd42ff9fb791e0b6 (diff) | |
PR tree-optimization/82945 - add warning for passing non-strings to functions that expect string arguments
gcc/ChangeLog:
PR tree-optimization/82945
* builtins.c (expand_builtin_strlen): Call maybe_warn_nonstring_arg.
* calls.h (maybe_warn_nonstring_arg): Declare new function.
* calls.c (get_attr_nonstring_decl, maybe_warn_nonstring_arg): New
functions.
(initialize_argument_information): Call maybe_warn_nonstring_arg.
* calls.h (get_attr_nonstring_decl): Declare new function.
* doc/extend.texi (attribute nonstring): Update.
* gimple-fold.c (gimple_fold_builtin_strncpy): Call
get_attr_nonstring_decl and handle it.
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Same. Improve
detection of nul-termination.
(strlen_to_stridx): Change to a pointer.
(handle_builtin_strlen, handle_builtin_stxncpy): Adjust.
(pass_strlen::execute): Same.
gcc/testsuite/ChangeLog:
PR tree-optimization/82945
* c-c++-common/Wstringop-truncation-2.c: New test.
* c-c++-common/Wstringop-truncation.c: Adjust.
* c-c++-common/attr-nonstring-2.c: Adjust.
* c-c++-common/attr-nonstring-3.c: New test.
From-SVN: r255031
Diffstat (limited to 'gcc/calls.h')
| -rw-r--r-- | gcc/calls.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/calls.h b/gcc/calls.h index df5817fe785..9b7fa9a2f9c 100644 --- a/gcc/calls.h +++ b/gcc/calls.h @@ -39,5 +39,7 @@ extern bool reference_callee_copied (CUMULATIVE_ARGS *, machine_mode, tree, bool); extern void maybe_warn_alloc_args_overflow (tree, tree, tree[2], int[2]); extern bool get_size_range (tree, tree[2]); +extern tree get_attr_nonstring_decl (tree, tree * = NULL); +extern void maybe_warn_nonstring_arg (tree, tree); #endif // GCC_CALLS_H |