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diff --git a/test/asan/TestCases/Posix/coverage-direct-large.cc b/test/asan/TestCases/Posix/coverage-direct-large.cc
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+++ b/test/asan/TestCases/Posix/coverage-direct-large.cc
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+// Test for direct coverage writing with lots of data.
+// Current implementation maps output file in chunks of 64K. This test overflows
+// 1 chunk.
+
+// RUN: %clangxx_asan -fsanitize-coverage=func -O0 -DSHARED %s -shared -o %dynamiclib -fPIC
+// RUN: %clangxx_asan -fsanitize-coverage=func -O0 %s %libdl -o %t
+
+// RUN: rm -rf %T/coverage-direct-large
+
+// RUN: mkdir -p %T/coverage-direct-large/normal && cd %T/coverage-direct-large/normal
+// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_direct=0:verbosity=1 %run %t %dynamiclib
+// RUN: %sancov print *.sancov >out.txt
+// RUN: cd ../..
+
+// RUN: mkdir -p %T/coverage-direct-large/direct && cd %T/coverage-direct-large/direct
+// RUN: env ASAN_OPTIONS=$ASAN_OPTIONS:coverage=1:coverage_direct=1:verbosity=1 %run %t %dynamiclib
+// RUN: %sancov rawunpack *.sancov.raw
+// RUN: %sancov print *.sancov >out.txt
+// RUN: cd ../..
+
+// RUN: diff -u coverage-direct-large/normal/out.txt coverage-direct-large/direct/out.txt
+//
+// XFAIL: android
+
+#define F0(Q, x) Q(x)
+#define F1(Q, x) \
+ F0(Q, x##0) F0(Q, x##1) F0(Q, x##2) F0(Q, x##3) F0(Q, x##4) F0(Q, x##5) \
+ F0(Q, x##6) F0(Q, x##7) F0(Q, x##8) F0(Q, x##9)
+#define F2(Q, x) \
+ F1(Q, x##0) F1(Q, x##1) F1(Q, x##2) F1(Q, x##3) F1(Q, x##4) F1(Q, x##5) \
+ F1(Q, x##6) F1(Q, x##7) F1(Q, x##8) F1(Q, x##9)
+#define F3(Q, x) \
+ F2(Q, x##0) F2(Q, x##1) F2(Q, x##2) F2(Q, x##3) F2(Q, x##4) F2(Q, x##5) \
+ F2(Q, x##6) F2(Q, x##7) F2(Q, x##8) F2(Q, x##9)
+#define F4(Q, x) \
+ F3(Q, x##0) F3(Q, x##1) F3(Q, x##2) F3(Q, x##3) F3(Q, x##4) F3(Q, x##5) \
+ F3(Q, x##6) F3(Q, x##7) F3(Q, x##8) F3(Q, x##9)
+
+#define DECL(x) __attribute__((noinline)) static void x() {}
+#define CALL(x) x();
+
+F4(DECL, f)
+
+#ifdef SHARED
+extern "C" void so_entry() {
+ F4(CALL, f)
+}
+#else
+
+#include <assert.h>
+#include <dlfcn.h>
+#include <stdio.h>
+int main(int argc, char **argv) {
+ F4(CALL, f)
+ assert(argc > 1);
+ void *handle1 = dlopen(argv[1], RTLD_LAZY); // %dynamiclib
+ assert(handle1);
+ void (*so_entry)() = (void (*)())dlsym(handle1, "so_entry");
+ assert(so_entry);
+ so_entry();
+
+ return 0;
+}
+
+#endif // SHARED