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| author | Martin Sebor <msebor@redhat.com> | 2020-06-10 12:00:08 -0600 |
|---|---|---|
| committer | Martin Sebor <msebor@redhat.com> | 2020-06-10 12:02:12 -0600 |
| commit | a2c2cee92e5defff9bf23d3b1184ee96e57e5fdd (patch) | |
| tree | aba4fb6e58da7b6f6e30f7e67e716a20a1a8a5ff /gcc/tree-ssa-loop-ch.c | |
| parent | 3a391adf7a38780f8d01dbac08a2a143fc80b469 (diff) | |
| download | gcc-a2c2cee92e5defff9bf23d3b1184ee96e57e5fdd.zip gcc-a2c2cee92e5defff9bf23d3b1184ee96e57e5fdd.tar.gz gcc-a2c2cee92e5defff9bf23d3b1184ee96e57e5fdd.tar.bz2 | |
PR middle-end/95353 - spurious -Wstringop-overflow writing to a trailing array plus offset
Also resolves:
PR middle-end/92939 - missing -Wstringop-overflow on negative index from the end of array
gcc/ChangeLog:
PR middle-end/95353
PR middle-end/92939
* builtins.c (inform_access): New function.
(check_access): Call it. Add argument.
(addr_decl_size): Remove.
(get_range): New function.
(compute_objsize): New overload. Only use compute_builtin_object_size
with raw memory function.
(check_memop_access): Pass new argument to compute_objsize and
check_access.
(expand_builtin_memchr, expand_builtin_strcat): Same.
(expand_builtin_strcpy, expand_builtin_stpcpy_1): Same.
(expand_builtin_stpncpy, check_strncat_sizes): Same.
(expand_builtin_strncat, expand_builtin_strncpy): Same.
(expand_builtin_memcmp): Same.
* builtins.h (check_nul_terminated_array): Declare extern.
(check_access): Add argument.
(struct access_ref, struct access_data): New structs.
* gimple-ssa-warn-restrict.c (clamp_offset): New helper.
(builtin_access::overlap): Call it.
* tree-object-size.c (decl_init_size): Declare extern.
(addr_object_size): Correct offset computation.
* tree-object-size.h (decl_init_size): Declare.
* tree-ssa-strlen.c (handle_integral_assign): Remove a call
to maybe_warn_overflow when assigning to an SSA_NAME.
gcc/testsuite/ChangeLog:
PR middle-end/95353
PR middle-end/92939
* c-c++-common/Wstringop-truncation.c: Remove an xfail.
* gcc.dg/Warray-bounds-46.c: Remove a bogus warning.
* gcc.dg/Wrestrict-9.c: Disable -Wstringop-overflow.
* gcc.dg/Wstringop-overflow-12.c: Remove xfails.
* gcc.dg/Wstringop-overflow-28.c: Same.
* gcc.dg/builtin-stringop-chk-4.c: Same.
* gcc.dg/builtin-stringop-chk-5.c: Same.
* gcc.dg/builtin-stringop-chk-8.c: Same.
* gcc.dg/strlenopt-74.c: Avoid buffer overflow.
* gcc.dg/Wstringop-overflow-34.c: New test.
* gcc.dg/Wstringop-overflow-35.c: New test.
* gcc.dg/Wstringop-overflow-36.c: New test.
* gcc.dg/Wstringop-overflow-37.c: New test.
* gcc.dg/Wstringop-overflow-38.c: New test.
Diffstat (limited to 'gcc/tree-ssa-loop-ch.c')
0 files changed, 0 insertions, 0 deletions