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| author | Martin Sebor <msebor@redhat.com> | 2016-12-08 00:01:33 +0000 |
|---|---|---|
| committer | Martin Sebor <msebor@gcc.gnu.org> | 2016-12-07 17:01:33 -0700 |
| commit | ee92e7bafb52d267f52e4c48edada5f279bcf591 (patch) | |
| tree | 1468c5482ab4b2c6c5a92894f2e96f47a742b995 /gcc/c-family/c.opt | |
| parent | fc3f36f9a1642338da8c0428ea5dc140402556c9 (diff) | |
| download | gcc-ee92e7bafb52d267f52e4c48edada5f279bcf591.zip gcc-ee92e7bafb52d267f52e4c48edada5f279bcf591.tar.gz gcc-ee92e7bafb52d267f52e4c48edada5f279bcf591.tar.bz2 | |
PR c/53562 - Add -Werror= support for -D_FORTIFY_SOURCE / __builtin___memcpy_chk
PR c/53562 - Add -Werror= support for -D_FORTIFY_SOURCE / __builtin___memcpy_chk
PR middle-end/77784 - duplicate warning for snprintf when n > object size
PR middle-end/78149 - missing warning on strncpy buffer overflow due to an excessive bound
PR middle-end/78138 - missing warnings on buffer overflow with non-constant source length
gcc/c-family/ChangeLog:
PR c/53562
PR middle-end/77784
PR middle-end/78149
PR middle-end/78138
* c.opt (-Wstringop-overflow): New option.
gcc/ChangeLog:
PR middle-end/77784
PR middle-end/78149
PR middle-end/78138
* builtins.c (expand_builtin_strcat, expand_builtin_strncat): New
functions.
(compute_dest_size, get_size_range, check_sizes, check_strncat_sizes)
(check_memop_sizes): Same.
(expand_builtin_memcpy): Call check memop_sizes.
(expand_builtin_mempcpy): Same.
(expand_builtin_memset): Same,
(expand_builtin_bzero): Same.
(expand_builtin_memory_chk): Call check_sizes.
(expand_builtin_strcpy): Same.
(expand_builtin_strncpy): Same.
(maybe_emit_sprintf_chk_warning): Same.
(expand_builtin): Handle strcat and strncat.
(fini_object_sizes): Reset pointers.
(compute_object_size): New function.
* gimple-ssa-sprintf.c (pass_sprintf_length::handle_gimple_call):
Avoid issuing warnings also issued during built-in expansion.
* doc/invoke.texi (Warning Options): Document -Wstringop-overflow.
gcc/testsuite/ChangeLog:
PR middle-end/77784
PR middle-end/78149
PR middle-end/78138
* c-c++-common/Wsizeof-pointer-memaccess2.c: Adjust expected diagnostic.
* g++.dg/ext/builtin-object-size3.C (bar): Same.
* g++.dg/ext/strncpy-chk1.C: Same.
* g++.dg/opt/memcpy1.C: Same.
* g++.dg/torture/Wsizeof-pointer-memaccess1.C: Same.
* gcc.c-torture/compile/pr55569.c: Disable -Wstringop-overflow.
* gcc.dg/Wobjsize-1.c: Adjust expected diagnostic.
* gcc.dg/attr-alloc_size.c: Same.
* gcc.dg/builtin-stringop-chk-1.c: Adjust expected diagnostic.
* gcc.dg/builtin-stringop-chk-2.c: Same.
* gcc.dg/builtin-stringop-chk-4.c: New test.
* gcc.dg/builtin-strncat-chk-1.c: Adjust expected diagnostic.
* gcc.dg/memcpy-2.c: Same.
* gcc.dg/pr40340-1.c: Same.
* gcc.dg/pr40340-2.c (main): Same.
* gcc.dg/pr40340-5.c (main): Same.
* gcc.dg/torture/Wsizeof-pointer-memaccess1.c: Same.
* gcc.dg/torture/pr71132.c: Disable -Wstringop-overflow.
* gcc.dg/tree-ssa/builtin-sprintf-warn-1.c: Adjust text of expected
warning.
* gfortran.dg/char_length_3.f90: Prune expected warnings.
* gfortran.dg/pr38868.f: Add expected warnings.
From-SVN: r243419
Diffstat (limited to 'gcc/c-family/c.opt')
| -rw-r--r-- | gcc/c-family/c.opt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt index 2d47d54..288e4ce 100644 --- a/gcc/c-family/c.opt +++ b/gcc/c-family/c.opt @@ -684,6 +684,16 @@ Wsizeof-array-argument C ObjC C++ ObjC++ Var(warn_sizeof_array_argument) Warning Init(1) Warn when sizeof is applied on a parameter declared as an array. +Wstringop-overflow +C ObjC C++ ObjC++ Warning Alias(Wstringop-overflow=, 2, 0) +Warn about buffer overflow in string manipulation functions like memcpy +and strcpy. + +Wstringop-overflow= +C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_stringop_overflow) Init(2) Warning +Under the control of Object Size type, warn about buffer overflow in string +manipulation functions like memcpy and strcpy. + Wsuggest-attribute=format C ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning Warn about functions which might be candidates for format attributes. |