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1// RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -Walloc-size %s2struct Foo { int x[10]; };3 4typedef __typeof__(sizeof(int)) size_t;5void *my_malloc(size_t) __attribute__((alloc_size(1)));6void *my_calloc(size_t, size_t) __attribute__((alloc_size(2, 1)));7 8void foo_consumer(struct Foo* p);9 10void alloc_foo(void) {11 struct Foo *ptr1 = my_malloc(sizeof(struct Foo));12 struct Foo *ptr2 = my_malloc(sizeof(*ptr2));13 struct Foo *ptr3 = my_calloc(1, sizeof(*ptr3));14 struct Foo *ptr4 = my_calloc(sizeof(*ptr4), 1);15 struct Foo (*ptr5)[5] = my_malloc(sizeof(*ptr5));16 void *ptr6 = my_malloc(4);17 18 // Test insufficient size with different allocation functions.19 struct Foo *ptr7 = my_malloc(sizeof(ptr7)); // expected-warning {{allocation of insufficient size '8' for type 'struct Foo' with size '40'}}20 struct Foo *ptr8 = my_calloc(1, sizeof(ptr8)); // expected-warning {{allocation of insufficient size '8' for type 'struct Foo' with size '40'}}21 struct Foo *ptr9 = my_calloc(sizeof(ptr9), 1); // expected-warning {{allocation of insufficient size '8' for type 'struct Foo' with size '40'}}22 23 // Test function arguments.24 foo_consumer(my_malloc(4)); // expected-warning {{allocation of insufficient size '4' for type 'struct Foo' with size '40'}}25 26 // Test explicit cast.27 struct Foo *ptr10 = (struct Foo *)my_malloc(sizeof(*ptr10));28 struct Foo *ptr11 = (struct Foo *)my_malloc(sizeof(ptr11)); // expected-warning {{allocation of insufficient size '8' for type 'struct Foo' with size '40'}}29 struct Foo *ptr12 = (struct Foo *)my_calloc(1, sizeof(ptr12)); // expected-warning {{allocation of insufficient size '8' for type 'struct Foo' with size '40'}}30 struct Foo *ptr13 = (struct Foo *)my_malloc(4); // expected-warning {{allocation of insufficient size '4' for type 'struct Foo' with size '40'}}31 void *ptr14 = (struct Foo *)my_malloc(4); // expected-warning {{allocation of insufficient size '4' for type 'struct Foo' with size '40'}}32 33 struct Foo *ptr15 = (void *)(struct Foo *)my_malloc(4); // expected-warning 2 {{allocation of insufficient size '4' for type 'struct Foo' with size '40'}}34 int *ptr16 = (unsigned *)(void *)(int *)my_malloc(1); // expected-warning {{initializing 'int *' with an expression of type 'unsigned int *' converts between pointers to integer types with different sign}}35 // expected-warning@-1 {{allocation of insufficient size '1' for type 'int' with size '4'}}36 // expected-warning@-2 {{allocation of insufficient size '1' for type 'unsigned int' with size '4'}}37 int *ptr17 = (void *)(int *)my_malloc(1); // expected-warning {{allocation of insufficient size '1' for type 'int' with size '4'}}38 // expected-warning@-1 {{allocation of insufficient size '1' for type 'int' with size '4'}}39 (void)(int *)my_malloc(1); // expected-warning {{allocation of insufficient size '1' for type 'int' with size '4'}}40 41 void *funcptr_1 = (void (*)(int))my_malloc(1);42 43 // Zero size allocations are assumed to be intentional.44 int *zero_alloc1 = my_malloc(0);45 int *zero_alloc2 = (int *)my_malloc(0);46}47