1 files changed, 61 insertions, 0 deletions
diff --git a/test/msan/chained_origin_memcpy.cc b/test/msan/chained_origin_memcpy.cc
new file mode 100644
index 000000000000..f4c2f7fcac87
--- /dev/null
+++ b/test/msan/chained_origin_memcpy.cc
@@ -0,0 +1,61 @@
+// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -m64 -DOFFSET=0 -O3 %s -o %t && \
+// RUN:     not %run %t >%t.out 2>&1
+// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 < %t.out
+
+// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DOFFSET=10 -m64 -O3 %s -o %t && \
+// RUN:     not %run %t >%t.out 2>&1
+// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 < %t.out
+
+
+// RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -m64 -DOFFSET=0 -O3 %s -o %t && \
+// RUN:     not %run %t >%t.out 2>&1
+// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 < %t.out
+
+// RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=10 -m64 -O3 %s -o %t && \
+// RUN:     not %run %t >%t.out 2>&1
+// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 < %t.out
+
+
+#include <stdio.h>
+#include <string.h>
+
+int xx[10000];
+int yy[10000];
+volatile int idx = 30;
+
+__attribute__((noinline))
+void fn_g(int a, int b) {
+  xx[idx] = a; xx[idx + 10] = b;
+}
+
+__attribute__((noinline))
+void fn_f(int a, int b) {
+  fn_g(a, b);
+}
+
+__attribute__((noinline))
+void fn_h() {
+  memcpy(&yy, &xx, sizeof(xx));
+}
+
+int main(int argc, char *argv[]) {
+  int volatile z1;
+  int volatile z2;
+  fn_f(z1, z2);
+  fn_h();
+  return yy[idx + OFFSET];
+}
+
+// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
+// CHECK: {{#0 .* in main .*chained_origin_memcpy.cc:46}}
+
+// CHECK: Uninitialized value was stored to memory at
+// CHECK: {{#1 .* in fn_h.*chained_origin_memcpy.cc:38}}
+
+// CHECK: Uninitialized value was stored to memory at
+// CHECK: {{#0 .* in fn_g.*chained_origin_memcpy.cc:28}}
+// CHECK: {{#1 .* in fn_f.*chained_origin_memcpy.cc:33}}
+
+// CHECK-Z1: Uninitialized value was created by an allocation of 'z1' in the stack frame of function 'main'
+// CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame of function 'main'
+// CHECK: {{#0 .* in main.*chained_origin_memcpy.cc:41}}