llvm-project/clang/test/Analysis/vla-overflow.c
Aaron Ballman 1ea584377e A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,

  void func();

becomes

  void func(void);

This is the ninth batch of tests being updated (there are a
significant number of other tests left to be updated).
2022-02-13 08:03:40 -05:00

26 lines
833 B
C

// RUN: %clang_analyze_cc1 -triple x86_64-pc-linux-gnu -analyzer-checker=core -verify %s
typedef unsigned long size_t;
#define BIGINDEX 65536U
size_t check_VLA_overflow_sizeof(unsigned int x) {
if (x == BIGINDEX) {
// We expect here that size_t is a 64 bit value.
// Size of this array should be the first to overflow.
size_t s = sizeof(char[x][x][x][x]); // expected-warning{{Declared variable-length array (VLA) has too large size [core.VLASize]}}
return s;
}
return 0;
}
void check_VLA_overflow_typedef(void) {
unsigned int x = BIGINDEX;
typedef char VLA[x][x][x][x]; // expected-warning{{Declared variable-length array (VLA) has too large size [core.VLASize]}}
}
void check_VLA_no_overflow(void) {
unsigned int x = BIGINDEX;
typedef char VLA[x][x][x][x - 1];
typedef char VLA1[0xffffffffu];
}