1 // This test program creates a very large number of unique histories. 2 3 // Heap origin. 4 // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -m64 -O3 %s -o %t 5 6 // RUN: MSAN_OPTIONS=origin_history_size=7 not %run %t >%t.out 2>&1 7 // RUN: FileCheck %s --check-prefix=CHECK7 < %t.out 8 9 // RUN: MSAN_OPTIONS=origin_history_size=2 not %run %t >%t.out 2>&1 10 // RUN: FileCheck %s --check-prefix=CHECK2 < %t.out 11 12 // RUN: MSAN_OPTIONS=origin_history_per_stack_limit=1 not %run %t >%t.out 2>&1 13 // RUN: FileCheck %s --check-prefix=CHECK-PER-STACK < %t.out 14 15 // Stack origin. 16 // RUN: %clangxx_msan -DSTACK -fsanitize-memory-track-origins=2 -m64 -O3 %s -o %t 17 18 // RUN: MSAN_OPTIONS=origin_history_size=7 not %run %t >%t.out 2>&1 19 // RUN: FileCheck %s --check-prefix=CHECK7 < %t.out 20 21 // RUN: MSAN_OPTIONS=origin_history_size=2 not %run %t >%t.out 2>&1 22 // RUN: FileCheck %s --check-prefix=CHECK2 < %t.out 23 24 // RUN: MSAN_OPTIONS=origin_history_per_stack_limit=1 not %run %t >%t.out 2>&1 25 // RUN: FileCheck %s --check-prefix=CHECK-PER-STACK < %t.out 26 27 28 // Heap origin, with calls. 29 // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -m64 -O3 %s -o %t 30 31 // RUN: MSAN_OPTIONS=origin_history_size=7 not %run %t >%t.out 2>&1 32 // RUN: FileCheck %s --check-prefix=CHECK7 < %t.out 33 34 // RUN: MSAN_OPTIONS=origin_history_size=2 not %run %t >%t.out 2>&1 35 // RUN: FileCheck %s --check-prefix=CHECK2 < %t.out 36 37 // RUN: MSAN_OPTIONS=origin_history_per_stack_limit=1 not %run %t >%t.out 2>&1 38 // RUN: FileCheck %s --check-prefix=CHECK-PER-STACK < %t.out 39 40 41 // Stack origin, with calls. 42 // RUN: %clangxx_msan -DSTACK -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -m64 -O3 %s -o %t 43 44 // RUN: MSAN_OPTIONS=origin_history_size=7 not %run %t >%t.out 2>&1 45 // RUN: FileCheck %s --check-prefix=CHECK7 < %t.out 46 47 // RUN: MSAN_OPTIONS=origin_history_size=2 not %run %t >%t.out 2>&1 48 // RUN: FileCheck %s --check-prefix=CHECK2 < %t.out 49 50 // RUN: MSAN_OPTIONS=origin_history_per_stack_limit=1 not %run %t >%t.out 2>&1 51 // RUN: FileCheck %s --check-prefix=CHECK-PER-STACK < %t.out 52 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 static char *buf, *cur, *end; 59 void init() { 60 buf = new char[1000]; 61 #ifdef STACK 62 char stackbuf[1000]; 63 char *volatile p = stackbuf; 64 memcpy(buf, p, 1000); 65 #endif 66 cur = buf; 67 end = buf + 1000; 68 } 69 70 void line_flush() { 71 char *p; 72 for (p = cur - 1; p >= buf; --p) 73 if (*p == '\n') 74 break; 75 if (p >= buf) { 76 size_t write_sz = p - buf + 1; 77 // write(2, buf, write_sz); 78 memmove(buf, p + 1, end - p - 1); 79 cur -= write_sz; 80 } 81 } 82 83 void buffered_write(const char *p, size_t sz) { 84 while (sz > 0) { 85 size_t copy_sz = end - cur; 86 if (sz < copy_sz) copy_sz = sz; 87 memcpy(cur, p, copy_sz); 88 cur += copy_sz; 89 sz -= copy_sz; 90 line_flush(); 91 } 92 } 93 94 void fn1() { 95 buffered_write("a\n", 2); 96 } 97 98 void fn2() { 99 buffered_write("a\n", 2); 100 } 101 102 void fn3() { 103 buffered_write("a\n", 2); 104 } 105 106 int main(void) { 107 init(); 108 for (int i = 0; i < 2000; ++i) { 109 fn1(); 110 fn2(); 111 fn3(); 112 } 113 return buf[50]; 114 } 115 116 // CHECK7: WARNING: MemorySanitizer: use-of-uninitialized-value 117 // CHECK7-NOT: Uninitialized value was stored to memory at 118 // CHECK7: Uninitialized value was stored to memory at 119 // CHECK7-NOT: Uninitialized value was stored to memory at 120 // CHECK7: Uninitialized value was stored to memory at 121 // CHECK7-NOT: Uninitialized value was stored to memory at 122 // CHECK7: Uninitialized value was stored to memory at 123 // CHECK7-NOT: Uninitialized value was stored to memory at 124 // CHECK7: Uninitialized value was stored to memory at 125 // CHECK7-NOT: Uninitialized value was stored to memory at 126 // CHECK7: Uninitialized value was stored to memory at 127 // CHECK7-NOT: Uninitialized value was stored to memory at 128 // CHECK7: Uninitialized value was stored to memory at 129 // CHECK7-NOT: Uninitialized value was stored to memory at 130 // CHECK7: Uninitialized value was created 131 132 // CHECK2: WARNING: MemorySanitizer: use-of-uninitialized-value 133 // CHECK2-NOT: Uninitialized value was stored to memory at 134 // CHECK2: Uninitialized value was stored to memory at 135 // CHECK2-NOT: Uninitialized value was stored to memory at 136 // CHECK2: Uninitialized value was created 137 138 // CHECK-PER-STACK: WARNING: MemorySanitizer: use-of-uninitialized-value 139 // CHECK-PER-STACK: Uninitialized value was stored to memory at 140 // CHECK-PER-STACK: in fn3 141 // CHECK-PER-STACK: Uninitialized value was stored to memory at 142 // CHECK-PER-STACK: in fn2 143 // CHECK-PER-STACK: Uninitialized value was stored to memory at 144 // CHECK-PER-STACK: in fn1 145 // CHECK-PER-STACK: Uninitialized value was created 146
