1 //===-- asan_asm_test.cc --------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is a part of AddressSanitizer, an address sanity checker.
12 //===----------------------------------------------------------------------===//
13 #include "asan_test_utils.h"
15 #if defined(__linux__)
17 #if defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
19 #include <emmintrin.h>
23 template<typename T> void asm_write(T *ptr, T val);
24 template<typename T> T asm_read(T *ptr);
25 template<typename T> void asm_rep_movs(T *dst, T *src, size_t n);
27 } // End of anonymous namespace
29 #endif // defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
31 #if defined(__x86_64__)
35 #define DECLARE_ASM_WRITE(Type, Size, Mov, Reg) \
36 template<> void asm_write<Type>(Type *ptr, Type val) { \
38 Mov " %[val], (%[ptr]) \n\t" \
40 : [ptr] "r" (ptr), [val] Reg (val) \
45 #define DECLARE_ASM_READ(Type, Size, Mov, Reg) \
46 template<> Type asm_read<Type>(Type *ptr) { \
49 Mov " (%[ptr]), %[res] \n\t" \
57 #define DECLARE_ASM_REP_MOVS(Type, Movs) \
58 template <> void asm_rep_movs<Type>(Type * dst, Type * src, size_t size) { \
59 __asm__("rep " Movs " \n\t" \
61 : "D"(dst), "S"(src), "c"(size) \
62 : "rsi", "rdi", "rcx", "memory"); \
65 DECLARE_ASM_WRITE(U8, "8", "movq", "r");
66 DECLARE_ASM_READ(U8, "8", "movq", "=r");
67 DECLARE_ASM_REP_MOVS(U8, "movsq");
69 } // End of anonymous namespace
71 #endif // defined(__x86_64__)
73 #if defined(__i386__) && defined(__SSE2__)
77 #define DECLARE_ASM_WRITE(Type, Size, Mov, Reg) \
78 template<> void asm_write<Type>(Type *ptr, Type val) { \
80 Mov " %[val], (%[ptr]) \n\t" \
82 : [ptr] "r" (ptr), [val] Reg (val) \
87 #define DECLARE_ASM_READ(Type, Size, Mov, Reg) \
88 template<> Type asm_read<Type>(Type *ptr) { \
91 Mov " (%[ptr]), %[res] \n\t" \
99 #define DECLARE_ASM_REP_MOVS(Type, Movs) \
100 template <> void asm_rep_movs<Type>(Type * dst, Type * src, size_t size) { \
101 __asm__("rep " Movs " \n\t" \
103 : "D"(dst), "S"(src), "c"(size) \
104 : "esi", "edi", "ecx", "memory"); \
107 } // End of anonymous namespace
109 #endif // defined(__i386__) && defined(__SSE2__)
111 #if defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
115 DECLARE_ASM_WRITE(U1, "1", "movb", "r");
116 DECLARE_ASM_WRITE(U2, "2", "movw", "r");
117 DECLARE_ASM_WRITE(U4, "4", "movl", "r");
118 DECLARE_ASM_WRITE(__m128i, "16", "movaps", "x");
120 DECLARE_ASM_READ(U1, "1", "movb", "=r");
121 DECLARE_ASM_READ(U2, "2", "movw", "=r");
122 DECLARE_ASM_READ(U4, "4", "movl", "=r");
123 DECLARE_ASM_READ(__m128i, "16", "movaps", "=x");
125 DECLARE_ASM_REP_MOVS(U1, "movsb");
126 DECLARE_ASM_REP_MOVS(U2, "movsw");
127 DECLARE_ASM_REP_MOVS(U4, "movsl");
129 template<typename T> void TestAsmWrite(const char *DeathPattern) {
131 EXPECT_DEATH(asm_write(&buf[1], static_cast<T>(0)), DeathPattern);
133 asm_write(&var, static_cast<T>(0x21));
134 ASSERT_EQ(static_cast<T>(0x21), var);
138 template<> void TestAsmWrite<__m128i>(const char *DeathPattern) {
139 char *buf = new char[16];
141 if (((uintptr_t) p % 16) != 0)
143 assert(((uintptr_t) p % 16) == 0);
144 __m128i val = _mm_set1_epi16(0x1234);
145 EXPECT_DEATH(asm_write<__m128i>((__m128i*) p, val), DeathPattern);
146 __m128i var = _mm_set1_epi16(0x4321);
147 asm_write(&var, val);
148 ASSERT_EQ(0x1234, _mm_extract_epi16(var, 0));
152 template<typename T> void TestAsmRead(const char *DeathPattern) {
154 EXPECT_DEATH(asm_read(&buf[1]), DeathPattern);
156 ASSERT_EQ(static_cast<T>(0x12), asm_read(&var));
160 template<> void TestAsmRead<__m128i>(const char *DeathPattern) {
161 char *buf = new char[16];
163 if (((uintptr_t) p % 16) != 0)
165 assert(((uintptr_t) p % 16) == 0);
166 EXPECT_DEATH(asm_read<__m128i>((__m128i*) p), DeathPattern);
167 __m128i val = _mm_set1_epi16(0x1234);
168 ASSERT_EQ(0x1234, _mm_extract_epi16(asm_read(&val), 0));
174 __asm__("movl (%[a]), %[r] \n\t" : [r] "=r" (r) : [a] "r" (a) : "memory");
178 void AsmStore(U4 r, U4 *a) {
179 __asm__("movl %[r], (%[a]) \n\t" : : [a] "r" (a), [r] "r" (r) : "memory");
182 template <typename T>
183 void TestAsmRepMovs(const char *DeathPatternRead,
184 const char *DeathPatternWrite) {
185 T src_good[4] = { 0x0, 0x1, 0x2, 0x3 };
187 asm_rep_movs(dst_good, src_good, 4);
188 ASSERT_EQ(static_cast<T>(0x0), dst_good[0]);
189 ASSERT_EQ(static_cast<T>(0x1), dst_good[1]);
190 ASSERT_EQ(static_cast<T>(0x2), dst_good[2]);
191 ASSERT_EQ(static_cast<T>(0x3), dst_good[3]);
194 EXPECT_DEATH(asm_rep_movs(dst_bad, src_good, 4), DeathPatternWrite);
196 T src_bad[3] = { 0x0, 0x1, 0x2 };
197 EXPECT_DEATH(asm_rep_movs(dst_good, src_bad, 4), DeathPatternRead);
201 asm_rep_movs(dp, sp, 0);
204 } // End of anonymous namespace
206 TEST(AddressSanitizer, asm_load_store) {
208 EXPECT_DEATH(AsmLoad(&buf[3]), "READ of size 4");
209 EXPECT_DEATH(AsmStore(0x1234, &buf[3]), "WRITE of size 4");
213 TEST(AddressSanitizer, asm_rw) {
214 TestAsmWrite<U1>("WRITE of size 1");
215 TestAsmWrite<U2>("WRITE of size 2");
216 TestAsmWrite<U4>("WRITE of size 4");
217 #if defined(__x86_64__)
218 TestAsmWrite<U8>("WRITE of size 8");
219 #endif // defined(__x86_64__)
220 TestAsmWrite<__m128i>("WRITE of size 16");
222 TestAsmRead<U1>("READ of size 1");
223 TestAsmRead<U2>("READ of size 2");
224 TestAsmRead<U4>("READ of size 4");
225 #if defined(__x86_64__)
226 TestAsmRead<U8>("READ of size 8");
227 #endif // defined(__x86_64__)
228 TestAsmRead<__m128i>("READ of size 16");
231 TEST(AddressSanitizer, asm_flags) {
235 #if defined(__x86_64__) && !defined(__ILP32__)
236 __asm__("xorq %%rax, %%rax \n\t"
237 "movq (%[p]), %%rax \n\t"
239 "movzbq %%al, %[r] \n\t"
244 __asm__("xorl %%eax, %%eax \n\t"
245 "movl (%[p]), %%eax \n\t"
247 "movzbl %%al, %[r] \n\t"
251 #endif // defined(__x86_64__) && !defined(__ILP32__)
256 TEST(AddressSanitizer, asm_rep_movs) {
257 TestAsmRepMovs<U1>("READ of size 1", "WRITE of size 1");
258 TestAsmRepMovs<U2>("READ of size 2", "WRITE of size 2");
259 TestAsmRepMovs<U4>("READ of size 4", "WRITE of size 4");
260 #if defined(__x86_64__)
261 TestAsmRepMovs<U8>("READ of size 8", "WRITE of size 8");
262 #endif // defined(__x86_64__)
265 #endif // defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__))
267 #endif // defined(__linux__)