| 1 | // RUN: %clangxx_msan -fno-sanitize-memory-param-retval -fsanitize-memory-track-origins=0 -O3 %s -o %t |
|---|---|
| 2 | |
| 3 | // RUN: not %run %t va_arg_tls 2>&1 | FileCheck %s --check-prefix=CHECK |
| 4 | // RUN: not %run %t overflow 2>&1 | FileCheck %s --check-prefix=CHECK |
| 5 | |
| 6 | // RUN: %clangxx_msan -fno-sanitize-memory-param-retval -fsanitize-memory-track-origins=2 -O3 %s -o %t |
| 7 | |
| 8 | // RUN: not %run %t va_arg_tls 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-ORIGIN |
| 9 | // RUN: not %run %t overflow 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-ORIGIN |
| 10 | |
| 11 | // Check that shadow and origin are passed through va_args. |
| 12 | |
| 13 | // Copying origins on AArch64, LoongArch64, MIPS and PowerPC isn't supported yet. |
| 14 | // XFAIL: target={{(aarch64|loongarch64|mips|powerpc64).*}} |
| 15 | |
| 16 | #include <stdarg.h> |
| 17 | #include <string.h> |
| 18 | |
| 19 | __attribute__((noinline)) |
| 20 | int sum(int n, ...) { |
| 21 | va_list args; |
| 22 | int i, sum = 0, arg; |
| 23 | volatile int temp; |
| 24 | va_start(args, n); |
| 25 | for (i = 0; i < n; i++) { |
| 26 | arg = va_arg(args, int); |
| 27 | sum += arg; |
| 28 | } |
| 29 | va_end(args); |
| 30 | return sum; |
| 31 | } |
| 32 | |
| 33 | int main(int argc, char *argv[]) { |
| 34 | volatile int uninit; |
| 35 | volatile int a = 1, b = 2; |
| 36 | if (argc == 2) { |
| 37 | // Shadow/origin will be passed via va_arg_tls/va_arg_origin_tls. |
| 38 | if (strcmp(s1: argv[1], s2: "va_arg_tls") == 0) { |
| 39 | return sum(n: 3, uninit, a, b); |
| 40 | } |
| 41 | // Shadow/origin of |uninit| will be passed via overflow area. |
| 42 | if (strcmp(s1: argv[1], s2: "overflow") == 0) { |
| 43 | return sum(n: 7, |
| 44 | a, a, a, a, a, a, uninit |
| 45 | ); |
| 46 | } |
| 47 | } |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
| 52 | // CHECK-ORIGIN: Uninitialized value was created by an allocation of 'uninit' in the stack frame |
| 53 |