forked from OSchip/llvm-project
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
// RUN: %clangxx_msan -fsanitize-memory-track-origins=0 -O3 %s -o %t && \
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// RUN: not %run %t va_arg_tls >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK < %t.out
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// RUN: %clangxx_msan -fsanitize-memory-track-origins=0 -O3 %s -o %t && \
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// RUN: not %run %t overflow >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK < %t.out
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// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O3 %s -o %t && \
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// RUN: not %run %t va_arg_tls >%t.out 2>&1
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// RUN: FileCheck %s --check-prefixes=CHECK,CHECK-ORIGIN < %t.out
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// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O3 %s -o %t && \
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// RUN: not %run %t overflow >%t.out 2>&1
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// RUN: FileCheck %s --check-prefixes=CHECK,CHECK-ORIGIN < %t.out
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// Check that shadow and origin are passed through va_args.
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// Copying origins on AArch64, MIPS and PowerPC isn't supported yet.
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// XFAIL: aarch64
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// XFAIL: mips
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// XFAIL: powerpc64
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#include <stdarg.h>
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#include <string.h>
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__attribute__((noinline))
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int sum(int n, ...) {
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va_list args;
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int i, sum = 0, arg;
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volatile int temp;
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va_start(args, n);
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for (i = 0; i < n; i++) {
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arg = va_arg(args, int);
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sum += arg;
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}
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va_end(args);
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return sum;
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}
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int main(int argc, char *argv[]) {
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volatile int uninit;
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volatile int a = 1, b = 2;
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if (argc == 2) {
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// Shadow/origin will be passed via va_arg_tls/va_arg_origin_tls.
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if (strcmp(argv[1], "va_arg_tls") == 0) {
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return sum(3, uninit, a, b);
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}
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// Shadow/origin of |uninit| will be passed via overflow area.
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if (strcmp(argv[1], "overflow") == 0) {
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return sum(7,
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a, a, a, a, a, a, uninit
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);
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}
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}
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return 0;
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}
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK-ORIGIN: Uninitialized value was created by an allocation of 'uninit' in the stack frame of function 'main'
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