derek.holloway
7502bf64a4
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63 lines
2.5 KiB
C++
63 lines
2.5 KiB
C++
// RUN: %clangxx_msan -fno-sanitize-memory-param-retval -fsanitize-memory-track-origins=2 -DOFFSET=0 -O3 %s -o %t && \
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// RUN: not %run %t >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 --check-prefix=CHECK-%short-stack < %t.out
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// RUN: %clangxx_msan -fno-sanitize-memory-param-retval -fsanitize-memory-track-origins=2 -DOFFSET=10 -O3 %s -o %t && \
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// RUN: not %run %t >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 --check-prefix=CHECK-%short-stack < %t.out
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// RUN: %clangxx_msan -fno-sanitize-memory-param-retval -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=0 -O3 %s -o %t && \
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// RUN: not %run %t >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 --check-prefix=CHECK-%short-stack < %t.out
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// RUN: %clangxx_msan -fno-sanitize-memory-param-retval -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=10 -O3 %s -o %t && \
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// RUN: not %run %t >%t.out 2>&1
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// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 --check-prefix=CHECK-%short-stack < %t.out
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#include <stdio.h>
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#include <string.h>
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int xx[10000];
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int yy[10000];
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volatile int idx = 30;
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__attribute__((noinline))
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void fn_g(int a, int b) {
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xx[idx] = a; xx[idx + 10] = b;
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}
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__attribute__((noinline))
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void fn_f(int a, int b) {
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fn_g(a, b);
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}
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__attribute__((noinline))
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void fn_h() {
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memcpy(&yy, &xx, sizeof(xx));
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}
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int main(int argc, char *argv[]) {
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int volatile z1;
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int volatile z2;
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fn_f(z1, z2);
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fn_h();
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return yy[idx + OFFSET];
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}
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK: {{#0 .* in main .*chained_origin_memcpy.cpp:}}[[@LINE-4]]
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// CHECK: Uninitialized value was stored to memory at
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// CHECK-FULL-STACK: {{#1 .* in fn_h.*chained_origin_memcpy.cpp:}}[[@LINE-15]]
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// CHECK-SHORT-STACK: {{#0 .* in __msan_memcpy.*msan_interceptors.cpp:}}
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// CHECK: Uninitialized value was stored to memory at
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// CHECK-FULL-STACK: {{#0 .* in fn_g.*chained_origin_memcpy.cpp:}}[[@LINE-29]]
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// CHECK-FULL-STACK: {{#1 .* in fn_f.*chained_origin_memcpy.cpp:}}[[@LINE-25]]
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// CHECK-SHORT-STACK: {{#0 .* in fn_g.*chained_origin_memcpy.cpp:}}[[@LINE-31]]
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// CHECK-Z1: Uninitialized value was created by an allocation of 'z1' in the stack frame
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// CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame
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// CHECK-Z1: {{#0 .* in main.*chained_origin_memcpy.cpp:}}[[@LINE-21]]
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// CHECK-Z2: {{#0 .* in main.*chained_origin_memcpy.cpp:}}[[@LINE-21]]
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