Blacklisted instrumenting _Balloc.

tests_lit/asan_tests/blacklist.ll

Index: tests_lit/asan_tests/blacklist.ll
diff --git a/tests_lit/asan_tests/blacklist.ll b/tests_lit/asan_tests/blacklist.ll
new file mode 100644
index 0000000000000000000000000000000000000000..9a82d9ddad0e4679ee55591d62447e0e8b220889
--- /dev/null
+++ b/tests_lit/asan_tests/blacklist.ll
@@ -0,0 +1,49 @@
+; Test to ensure that blacklisted functions are not instrumented and others are.
+
+; REQUIRES: allow_dump
+
+; RUN: %p2i -i %s --args -verbose=inst -threads=0 -fsanitize-address \
+; RUN:     -allow-externally-defined-symbols | FileCheck --check-prefix=DUMP %s
+
+declare external i32 @malloc(i32)
+declare external void @free(i32)
+
+; A black listed function
+define internal void @_Balloc() {
+  %local = alloca i8, i32 4, align 4
+  %heapvar = call i32 @malloc(i32 42)
+  call void @free(i32 %heapvar)
+  ret void
+}
+
+; DUMP-LABEL: ================ Instrumented CFG ================
+; DUMP-NEXT: define internal void @_Balloc() {
+; DUMP-NEXT: __0:
+; DUMP-NEXT:   %local = alloca i8, i32 4, align 4
+; DUMP-NEXT:   %heapvar = call i32 @malloc(i32 42)
+; DUMP-NEXT:   call void @free(i32 %heapvar)
+; DUMP-NEXT:   ret void
+; DUMP-NEXT: }
+
+; A non black listed function
+define internal void @func() {
+  %local = alloca i8, i32 4, align 4
+  %heapvar = call i32 @malloc(i32 42)
+  call void @free(i32 %heapvar)
+  ret void
+}
+
+; DUMP-LABEL: ================ Instrumented CFG ================
+; DUMP-NEXT: define internal void @func() {
+; DUMP-NEXT: __0:
+; DUMP-NEXT:   %local = alloca i8, i32 64, align 8
+; DUMP-NEXT:   %__$rz1 = alloca i8, i32 32, align 8
+; DUMP-NEXT:   call void @__asan_poison(i32 %__$rz1, i32 32)
+; DUMP-NEXT:   %__$rz0 = add i32 %local, 4
+; DUMP-NEXT:   call void @__asan_poison(i32 %__$rz0, i32 60)
+; DUMP-NEXT:   %heapvar = call i32 @__asan_malloc(i32 42)
+; DUMP-NEXT:   call void @__asan_free(i32 %heapvar)
+; DUMP-NEXT:   call void @__asan_unpoison(i32 %__$rz0, i32 60)
+; DUMP-NEXT:   call void @__asan_unpoison(i32 %__$rz1, i32 32)
+; DUMP-NEXT:   ret void
+; DUMP-NEXT: }