diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/c-family/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/c-family/c-common.c | 37 | ||||
| -rw-r--r-- | gcc/doc/extend.texi | 14 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/atomic-fetch-bool.c | 64 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/sync-fetch-bool.c | 54 |
7 files changed, 180 insertions, 8 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ad44844..7331599 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-01-07 Martin Sebor <msebor@redhat.com> + + PR c/68966 + * doc/extend.texi (__atomic Builtins, __sync Builtins): Document + constraint on the type of arguments. + 2016-01-07 Andreas Tobler <andreast@gcc.gnu.org> * config/arm/freebsd.h: Rename SUBTARGET_OVERRIDE_OPTIONS to diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index 7bae1a7..a2743d8 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -1,3 +1,10 @@ +gcc/c-family/ChangeLog: +2016-01-07 Martin Sebor <msebor@redhat.com> + + PR c/68966 + * c-common.c (sync_resolve_size): Reject first argument when it's + a pointer to _Bool. + 2016-01-05 David Malcolm <dmalcolm@redhat.com> PR c/69122 diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index a46e52b..0fd37b5c6 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -10657,11 +10657,16 @@ builtin_type_for_size (int size, bool unsignedp) /* A helper function for resolve_overloaded_builtin in resolving the overloaded __sync_ builtins. Returns a positive power of 2 if the first operand of PARAMS is a pointer to a supported data type. - Returns 0 if an error is encountered. */ + Returns 0 if an error is encountered. + FETCH is true when FUNCTION is one of the _FETCH_OP_ or _OP_FETCH_ + built-ins. */ static int -sync_resolve_size (tree function, vec<tree, va_gc> *params) +sync_resolve_size (tree function, vec<tree, va_gc> *params, bool fetch) { + /* Type of the argument. */ + tree argtype; + /* Type the argument points to. */ tree type; int size; @@ -10671,7 +10676,7 @@ sync_resolve_size (tree function, vec<tree, va_gc> *params) return 0; } - type = TREE_TYPE ((*params)[0]); + argtype = type = TREE_TYPE ((*params)[0]); if (TREE_CODE (type) == ARRAY_TYPE) { /* Force array-to-pointer decay for C++. */ @@ -10686,12 +10691,16 @@ sync_resolve_size (tree function, vec<tree, va_gc> *params) if (!INTEGRAL_TYPE_P (type) && !POINTER_TYPE_P (type)) goto incompatible; + if (fetch && TREE_CODE (type) == BOOLEAN_TYPE) + goto incompatible; + size = tree_to_uhwi (TYPE_SIZE_UNIT (type)); if (size == 1 || size == 2 || size == 4 || size == 8 || size == 16) return size; incompatible: - error ("incompatible type for argument %d of %qE", 1, function); + error ("operand type %qT is incompatible with argument %d of %qE", + argtype, 1, function); return 0; } @@ -11250,6 +11259,11 @@ resolve_overloaded_builtin (location_t loc, tree function, vec<tree, va_gc> *params) { enum built_in_function orig_code = DECL_FUNCTION_CODE (function); + + /* Is function one of the _FETCH_OP_ or _OP_FETCH_ built-ins? + Those are not valid to call with a pointer to _Bool (or C++ bool) + and so must be rejected. */ + bool fetch_op = true; bool orig_format = true; tree new_return = NULL_TREE; @@ -11325,6 +11339,10 @@ resolve_overloaded_builtin (location_t loc, tree function, case BUILT_IN_ATOMIC_COMPARE_EXCHANGE_N: case BUILT_IN_ATOMIC_LOAD_N: case BUILT_IN_ATOMIC_STORE_N: + { + fetch_op = false; + /* Fallthrough to further processing. */ + } case BUILT_IN_ATOMIC_ADD_FETCH_N: case BUILT_IN_ATOMIC_SUB_FETCH_N: case BUILT_IN_ATOMIC_AND_FETCH_N: @@ -11358,7 +11376,16 @@ resolve_overloaded_builtin (location_t loc, tree function, case BUILT_IN_SYNC_LOCK_TEST_AND_SET_N: case BUILT_IN_SYNC_LOCK_RELEASE_N: { - int n = sync_resolve_size (function, params); + /* The following are not _FETCH_OPs and must be accepted with + pointers to _Bool (or C++ bool). */ + if (fetch_op) + fetch_op = + (orig_code != BUILT_IN_SYNC_BOOL_COMPARE_AND_SWAP_N + && orig_code != BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_N + && orig_code != BUILT_IN_SYNC_LOCK_TEST_AND_SET_N + && orig_code != BUILT_IN_SYNC_LOCK_RELEASE_N); + + int n = sync_resolve_size (function, params, fetch_op); tree new_function, first_param, result; enum built_in_function fncode; diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 35d7e57..8122c4c 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -9316,6 +9316,9 @@ returns the value that had previously been in memory. That is, @{ tmp = *ptr; *ptr = ~(tmp & value); return tmp; @} // nand @end smallexample +The object pointed to by the first argument must be of integer or pointer +type. It must not be a Boolean type. + @emph{Note:} GCC 4.4 and later implement @code{__sync_fetch_and_nand} as @code{*ptr = ~(tmp & value)} instead of @code{*ptr = ~tmp & value}. @@ -9339,6 +9342,9 @@ return the new value. That is, @{ *ptr = ~(*ptr & value); return *ptr; @} // nand @end smallexample +The same constraints on arguments apply as for the corresponding +@code{__sync_op_and_fetch} built-in functions. + @emph{Note:} GCC 4.4 and later implement @code{__sync_nand_and_fetch} as @code{*ptr = ~(*ptr & value)} instead of @code{*ptr = ~*ptr & value}. @@ -9585,13 +9591,14 @@ pointer. @deftypefnx {Built-in Function} @var{type} __atomic_or_fetch (@var{type} *ptr, @var{type} val, int memorder) @deftypefnx {Built-in Function} @var{type} __atomic_nand_fetch (@var{type} *ptr, @var{type} val, int memorder) These built-in functions perform the operation suggested by the name, and -return the result of the operation. That is, +return the result of the operation. That is, @smallexample @{ *ptr @var{op}= val; return *ptr; @} @end smallexample -All memory orders are valid. +The object pointed to by the first argument must be of integer or pointer +type. It must not be a Boolean type. All memory orders are valid. @end deftypefn @@ -9608,7 +9615,8 @@ return the value that had previously been in @code{*@var{ptr}}. That is, @{ tmp = *ptr; *ptr @var{op}= val; return tmp; @} @end smallexample -All memory orders are valid. +The same constraints on arguments apply as for the corresponding +@code{__atomic_op_fetch} built-in functions. All memory orders are valid. @end deftypefn diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 52e54c7..5840815 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2016-01-07 Martin Sebor <msebor@redhat.com> + + PR c/68966 + * gcc.dg/atomic-fetch-bool.c: New test. + * gcc.dg/sync-fetch-bool.c: New test. + 2016-01-07 H.J. Lu <hongjiu.lu@intel.com> PR fortran/66680 diff --git a/gcc/testsuite/gcc.dg/atomic-fetch-bool.c b/gcc/testsuite/gcc.dg/atomic-fetch-bool.c new file mode 100644 index 0000000..f7af11f --- /dev/null +++ b/gcc/testsuite/gcc.dg/atomic-fetch-bool.c @@ -0,0 +1,64 @@ +/* PR c/68966 - atomic_fetch_* on atomic_bool not diagnosed + Test to verify that calls to __atomic_fetch_op funcions with a _Bool + argument are rejected. This is necessary because GCC expects that + all initialized _Bool objects have a specific representation and + allowing atomic operations to change it would break the invariant. */ +/* { dg-do compile } */ +/* { dg-options "-pedantic-errors -std=c11" } */ + + +void test_atomic_bool (_Atomic _Bool *a) +{ + enum { SEQ_CST = __ATOMIC_SEQ_CST }; + + __atomic_fetch_add (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_fetch_add." } */ + __atomic_fetch_sub (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_fetch_sub." } */ + __atomic_fetch_and (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_fetch_and." } */ + __atomic_fetch_xor (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_fetch_xor." } */ + __atomic_fetch_or (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_fetch_or." } */ + __atomic_fetch_nand (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_fetch_nand." } */ + + __atomic_add_fetch (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_add_fetch." } */ + __atomic_sub_fetch (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_sub_fetch." } */ + __atomic_and_fetch (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_and_fetch." } */ + __atomic_xor_fetch (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_xor_fetch." } */ + __atomic_or_fetch (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_or_fetch." } */ + __atomic_nand_fetch (a, 1, SEQ_CST); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__atomic_nand_fetch." } */ + + /* The following are valid and must be accepted. */ + _Bool val = 0, ret = 0; + __atomic_exchange (a, &val, &ret, SEQ_CST); + __atomic_exchange_n (a, val, SEQ_CST); + __atomic_compare_exchange (a, &val, &ret, !1, SEQ_CST, SEQ_CST); + __atomic_compare_exchange_n (a, &val, ret, !1, SEQ_CST, SEQ_CST); + __atomic_test_and_set (a, SEQ_CST); + __atomic_clear (a, SEQ_CST); +} + +void test_bool (_Bool *b) +{ + enum { SEQ_CST = __ATOMIC_SEQ_CST }; + + __atomic_fetch_add (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_fetch_add." } */ + __atomic_fetch_sub (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_fetch_sub." } */ + __atomic_fetch_and (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_fetch_and." } */ + __atomic_fetch_xor (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_fetch_xor." } */ + __atomic_fetch_or (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_fetch_or." } */ + __atomic_fetch_nand (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_fetch_nand." } */ + + __atomic_add_fetch (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_add_fetch." } */ + __atomic_sub_fetch (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_sub_fetch." } */ + __atomic_and_fetch (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_and_fetch." } */ + __atomic_xor_fetch (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_xor_fetch." } */ + __atomic_or_fetch (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_or_fetch." } */ + __atomic_nand_fetch (b, 1, SEQ_CST); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__atomic_nand_fetch." } */ + + /* The following are valid and must be accepted. */ + _Bool val = 0, ret = 0; + __atomic_exchange (b, &val, &ret, SEQ_CST); + __atomic_exchange_n (b, val, SEQ_CST); + __atomic_compare_exchange (b, &val, &ret, !1, SEQ_CST, SEQ_CST); + __atomic_compare_exchange_n (b, &val, ret, !1, SEQ_CST, SEQ_CST); + __atomic_test_and_set (b, SEQ_CST); + __atomic_clear (b, SEQ_CST); +} diff --git a/gcc/testsuite/gcc.dg/sync-fetch-bool.c b/gcc/testsuite/gcc.dg/sync-fetch-bool.c new file mode 100644 index 0000000..1d156a9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/sync-fetch-bool.c @@ -0,0 +1,54 @@ +/* PR c/68966 - atomic_fetch_* on atomic_bool not diagnosed + Test to verify that calls to __sync_fetch_op funcions with a _Bool + argument are rejected. This is necessary because GCC expects that + all initialized _Bool objects have a specific representation and + allowing atomic operations to change it would break the invariant. */ +/* { dg-do compile } */ +/* { dg-options "-pedantic-errors -std=c11" } */ + + +void test_sync_atomic_bool (_Atomic _Bool *a) +{ + __sync_fetch_and_add (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_add." } */ + __sync_fetch_and_sub (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_sub." } */ + __sync_fetch_and_and (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_and." } */ + __sync_fetch_and_xor (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_xor." } */ + __sync_fetch_and_or (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_or." } */ + __sync_fetch_and_nand (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_nand." } */ + + __sync_add_and_fetch (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_add_and_fetch." } */ + __sync_sub_and_fetch (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_sub_and_fetch." } */ + __sync_and_and_fetch (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_and_and_fetch." } */ + __sync_xor_and_fetch (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_xor_and_fetch." } */ + __sync_or_and_fetch (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_or_and_fetch." } */ + __sync_nand_and_fetch (a, 1); /* { dg-error "operand type ._Atomic _Bool \\*. is incompatible with argument 1 of .__sync_nand_and_fetch." } */ + + /* The following are valid and must be accepted. */ + __sync_bool_compare_and_swap (a, 0, 1); + __sync_val_compare_and_swap (a, 0, 1); + __sync_lock_test_and_set (a, 1); + __sync_lock_release (a); +} + +void test_sync_bool (_Bool *b) +{ + __sync_fetch_and_add (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_add." } */ + __sync_fetch_and_sub (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_sub." } */ + __sync_fetch_and_and (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_and." } */ + __sync_fetch_and_xor (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_xor." } */ + __sync_fetch_and_or (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_or." } */ + __sync_fetch_and_nand (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_fetch_and_nand." } */ + + __sync_add_and_fetch (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_add_and_fetch." } */ + __sync_sub_and_fetch (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_sub_and_fetch." } */ + __sync_and_and_fetch (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_and_and_fetch." } */ + __sync_xor_and_fetch (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_xor_and_fetch." } */ + __sync_or_and_fetch (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_or_and_fetch." } */ + __sync_nand_and_fetch (b, 1); /* { dg-error "operand type ._Bool \\*. is incompatible with argument 1 of .__sync_nand_and_fetch." } */ + + /* The following are valid and must be accepted. */ + __sync_bool_compare_and_swap (b, 0, 1); + __sync_val_compare_and_swap (b, 0, 1); + __sync_lock_test_and_set (b, 1); + __sync_lock_release (b); +} |