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[asan] End-to-end test for REP MOVS instrumentation. 

Patch by Yuri Gorshenin.

llvm-svn: 214396
This commit is contained in:
Evgeniy Stepanov 2014-07-31 09:12:20 +00:00
parent 77ad86681f
commit 1cd9e019da
1 changed files with 53 additions and 0 deletions
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53
compiler-rt/lib/asan/tests/asan_asm_test.cc
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@ -22,6 +22,7 @@ namespace {
template<typename T> void asm_write(T *ptr, T val);
template<typename T> T asm_read(T *ptr);
template<typename T> void asm_rep_movs(T *dst, T *src, size_t n);
} // End of anonymous namespace
@ -53,8 +54,17 @@ template<> Type asm_read<Type>(Type *ptr) { \
return res; \
}
#define DECLARE_ASM_REP_MOVS(Type, Movs) \
template <> void asm_rep_movs<Type>(Type * dst, Type * src, size_t size) { \
__asm__("rep " Movs " \n\t" \
: \
: "D"(dst), "S"(src), "c"(size) \
: "rsi", "rdi", "rcx", "memory"); \
}
DECLARE_ASM_WRITE(U8, "8", "movq", "r");
DECLARE_ASM_READ(U8, "8", "movq", "=r");
DECLARE_ASM_REP_MOVS(U8, "movsq");
} // End of anonymous namespace
@ -86,6 +96,14 @@ template<> Type asm_read<Type>(Type *ptr) { \
return res; \
}
#define DECLARE_ASM_REP_MOVS(Type, Movs) \
template <> void asm_rep_movs<Type>(Type * dst, Type * src, size_t size) { \
__asm__("rep " Movs " \n\t" \
: \
: "D"(dst), "S"(src), "c"(size) \
: "esi", "edi", "ecx", "memory"); \
}
} // End of anonymous namespace
#endif // defined(__i386__) && defined(__SSE2__)
@ -104,6 +122,10 @@ DECLARE_ASM_READ(U2, "2", "movw", "=r");
DECLARE_ASM_READ(U4, "4", "movl", "=r");
DECLARE_ASM_READ(__m128i, "16", "movaps", "=x");
DECLARE_ASM_REP_MOVS(U1, "movsb");
DECLARE_ASM_REP_MOVS(U2, "movsw");
DECLARE_ASM_REP_MOVS(U4, "movsl");
template<typename T> void TestAsmWrite(const char *DeathPattern) {
T *buf = new T;
EXPECT_DEATH(asm_write(&buf[1], static_cast<T>(0)), DeathPattern);
@ -157,6 +179,28 @@ void AsmStore(U4 r, U4 *a) {
__asm__("movl %[r], (%[a]) \n\t" : : [a] "r" (a), [r] "r" (r) : "memory");
}
template <typename T>
void TestAsmRepMovs(const char *DeathPatternRead,
const char *DeathPatternWrite) {
T src_good[4] = { 0x0, 0x1, 0x2, 0x3 };
T dst_good[4] = {};
asm_rep_movs(dst_good, src_good, 4);
ASSERT_EQ(static_cast<T>(0x0), dst_good[0]);
ASSERT_EQ(static_cast<T>(0x1), dst_good[1]);
ASSERT_EQ(static_cast<T>(0x2), dst_good[2]);
ASSERT_EQ(static_cast<T>(0x3), dst_good[3]);
T dst_bad[3];
EXPECT_DEATH(asm_rep_movs(dst_bad, src_good, 4), DeathPatternWrite);
T src_bad[3] = { 0x0, 0x1, 0x2 };
EXPECT_DEATH(asm_rep_movs(dst_good, src_bad, 4), DeathPatternRead);
T* dp = dst_bad + 4;
T* sp = src_bad + 4;
asm_rep_movs(dp, sp, 0);
}
} // End of anonymous namespace
TEST(AddressSanitizer, asm_load_store) {
@ -209,6 +253,15 @@ TEST(AddressSanitizer, asm_flags) {
ASSERT_EQ(0x1, r);
}
TEST(AddressSanitizer, asm_rep_movs) {
TestAsmRepMovs<U1>("READ of size 1", "WRITE of size 1");
TestAsmRepMovs<U2>("READ of size 2", "WRITE of size 2");
TestAsmRepMovs<U4>("READ of size 4", "WRITE of size 4");
#if defined(__x86_64__)
TestAsmRepMovs<U8>("READ of size 8", "WRITE of size 8");
#endif // defined(__x86_64__)
}
#endif // defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
#endif // defined(__linux__)