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-rw-r--r--lib/asan/tests/asan_asm_test.cc267
1 files changed, 267 insertions, 0 deletions
diff --git a/lib/asan/tests/asan_asm_test.cc b/lib/asan/tests/asan_asm_test.cc
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index 000000000000..1d8b04d611bd
--- /dev/null
+++ b/lib/asan/tests/asan_asm_test.cc
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+//===-- asan_asm_test.cc --------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+//===----------------------------------------------------------------------===//
+#include "asan_test_utils.h"
+
+#if defined(__linux__)
+
+#if defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
+
+#include <emmintrin.h>
+
+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
+
+#endif // defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
+
+#if defined(__x86_64__)
+
+namespace {
+
+#define DECLARE_ASM_WRITE(Type, Size, Mov, Reg) \
+template<> void asm_write<Type>(Type *ptr, Type val) { \
+ __asm__( \
+ Mov " %[val], (%[ptr]) \n\t" \
+ : \
+ : [ptr] "r" (ptr), [val] Reg (val) \
+ : "memory" \
+ ); \
+}
+
+#define DECLARE_ASM_READ(Type, Size, Mov, Reg) \
+template<> Type asm_read<Type>(Type *ptr) { \
+ Type res; \
+ __asm__( \
+ Mov " (%[ptr]), %[res] \n\t" \
+ : [res] Reg (res) \
+ : [ptr] "r" (ptr) \
+ : "memory" \
+ ); \
+ 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
+
+#endif // defined(__x86_64__)
+
+#if defined(__i386__) && defined(__SSE2__)
+
+namespace {
+
+#define DECLARE_ASM_WRITE(Type, Size, Mov, Reg) \
+template<> void asm_write<Type>(Type *ptr, Type val) { \
+ __asm__( \
+ Mov " %[val], (%[ptr]) \n\t" \
+ : \
+ : [ptr] "r" (ptr), [val] Reg (val) \
+ : "memory" \
+ ); \
+}
+
+#define DECLARE_ASM_READ(Type, Size, Mov, Reg) \
+template<> Type asm_read<Type>(Type *ptr) { \
+ Type res; \
+ __asm__( \
+ Mov " (%[ptr]), %[res] \n\t" \
+ : [res] Reg (res) \
+ : [ptr] "r" (ptr) \
+ : "memory" \
+ ); \
+ 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__)
+
+#if defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
+
+namespace {
+
+DECLARE_ASM_WRITE(U1, "1", "movb", "r");
+DECLARE_ASM_WRITE(U2, "2", "movw", "r");
+DECLARE_ASM_WRITE(U4, "4", "movl", "r");
+DECLARE_ASM_WRITE(__m128i, "16", "movaps", "x");
+
+DECLARE_ASM_READ(U1, "1", "movb", "=r");
+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);
+ T var = 0x12;
+ asm_write(&var, static_cast<T>(0x21));
+ ASSERT_EQ(static_cast<T>(0x21), var);
+ delete buf;
+}
+
+template<> void TestAsmWrite<__m128i>(const char *DeathPattern) {
+ char *buf = new char[16];
+ char *p = buf + 16;
+ if (((uintptr_t) p % 16) != 0)
+ p = buf + 8;
+ assert(((uintptr_t) p % 16) == 0);
+ __m128i val = _mm_set1_epi16(0x1234);
+ EXPECT_DEATH(asm_write<__m128i>((__m128i*) p, val), DeathPattern);
+ __m128i var = _mm_set1_epi16(0x4321);
+ asm_write(&var, val);
+ ASSERT_EQ(0x1234, _mm_extract_epi16(var, 0));
+ delete [] buf;
+}
+
+template<typename T> void TestAsmRead(const char *DeathPattern) {
+ T *buf = new T;
+ EXPECT_DEATH(asm_read(&buf[1]), DeathPattern);
+ T var = 0x12;
+ ASSERT_EQ(static_cast<T>(0x12), asm_read(&var));
+ delete buf;
+}
+
+template<> void TestAsmRead<__m128i>(const char *DeathPattern) {
+ char *buf = new char[16];
+ char *p = buf + 16;
+ if (((uintptr_t) p % 16) != 0)
+ p = buf + 8;
+ assert(((uintptr_t) p % 16) == 0);
+ EXPECT_DEATH(asm_read<__m128i>((__m128i*) p), DeathPattern);
+ __m128i val = _mm_set1_epi16(0x1234);
+ ASSERT_EQ(0x1234, _mm_extract_epi16(asm_read(&val), 0));
+ delete [] buf;
+}
+
+U4 AsmLoad(U4 *a) {
+ U4 r;
+ __asm__("movl (%[a]), %[r] \n\t" : [r] "=r" (r) : [a] "r" (a) : "memory");
+ return r;
+}
+
+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) {
+ U4* buf = new U4[2];
+ EXPECT_DEATH(AsmLoad(&buf[3]), "READ of size 4");
+ EXPECT_DEATH(AsmStore(0x1234, &buf[3]), "WRITE of size 4");
+ delete [] buf;
+}
+
+TEST(AddressSanitizer, asm_rw) {
+ TestAsmWrite<U1>("WRITE of size 1");
+ TestAsmWrite<U2>("WRITE of size 2");
+ TestAsmWrite<U4>("WRITE of size 4");
+#if defined(__x86_64__)
+ TestAsmWrite<U8>("WRITE of size 8");
+#endif // defined(__x86_64__)
+ TestAsmWrite<__m128i>("WRITE of size 16");
+
+ TestAsmRead<U1>("READ of size 1");
+ TestAsmRead<U2>("READ of size 2");
+ TestAsmRead<U4>("READ of size 4");
+#if defined(__x86_64__)
+ TestAsmRead<U8>("READ of size 8");
+#endif // defined(__x86_64__)
+ TestAsmRead<__m128i>("READ of size 16");
+}
+
+TEST(AddressSanitizer, asm_flags) {
+ long magic = 0x1234;
+ long r = 0x0;
+
+#if defined(__x86_64__)
+ __asm__("xorq %%rax, %%rax \n\t"
+ "movq (%[p]), %%rax \n\t"
+ "sete %%al \n\t"
+ "movzbq %%al, %[r] \n\t"
+ : [r] "=r"(r)
+ : [p] "r"(&magic)
+ : "rax", "memory");
+#else
+ __asm__("xorl %%eax, %%eax \n\t"
+ "movl (%[p]), %%eax \n\t"
+ "sete %%al \n\t"
+ "movzbl %%al, %[r] \n\t"
+ : [r] "=r"(r)
+ : [p] "r"(&magic)
+ : "eax", "memory");
+#endif // defined(__x86_64__)
+
+ 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__)
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