1 // RUN: %clang_dfsan -gmlt -mllvm -dfsan-track-origins=1 %s -o %t && \
2 // RUN: %run %t >%t.out 2>&1
3 // RUN: FileCheck %s < %t.out
4 //
5 // RUN: %clang_dfsan -gmlt -mllvm -dfsan-track-origins=1 -mllvm -dfsan-instrument-with-call-threshold=0 %s -o %t && \
6 // RUN: %run %t >%t.out 2>&1
7 // RUN: FileCheck %s < %t.out
8
9 #include <assert.h>
10 #include <malloc.h>
11 #include <sanitizer/dfsan_interface.h>
12 #include <stdio.h>
13 #include <string.h>
14
15 #define NOINLINE __attribute__((noinline))
16
foo(int a,int b)17 NOINLINE int foo(int a, int b) { return a + b; }
18
bar(int depth,void * addr,int size)19 NOINLINE void bar(int depth, void *addr, int size) {
20 if (depth) {
21 bar(depth - 1, addr, size);
22 } else {
23 dfsan_set_label(1, addr, size);
24 }
25 }
26
baz(int depth,void * addr,int size)27 NOINLINE void baz(int depth, void *addr, int size) { bar(depth, addr, size); }
28
main(int argc,char * argv[])29 int main(int argc, char *argv[]) {
30 int a = 10;
31 int b = 20;
32 baz(8, &a, sizeof(a));
33 int c = foo(a, b);
34 dfsan_print_origin_trace(&c, NULL);
35 // CHECK: Taint value 0x1 {{.*}} origin tracking ()
36 // CHECK: Origin value: {{.*}}, Taint value was stored to memory at
37 // CHECK: #0 {{.*}} in main {{.*}}origin_stack_trace.c:[[@LINE-4]]
38
39 // CHECK: Origin value: {{.*}}, Taint value was created at
40 // CHECK: #0 {{.*}} in bar.dfsan {{.*}}origin_stack_trace.c:[[@LINE-17]]
41 // CHECK-COUNT-8: #{{[0-9]+}} {{.*}} in bar.dfsan {{.*}}origin_stack_trace.c:[[@LINE-20]]
42 // CHECK: #9 {{.*}} in baz.dfsan {{.*}}origin_stack_trace.c:[[@LINE-15]]
43
44 // Test logic expects this buffer to be large enough.
45 // String contains current paths, which could vary in length.
46 // Make this buffer much larger than necessary to accomodate variation.
47 const size_t kBufSize = 8192;
48 char *buf = (char *)malloc(kBufSize);
49 size_t length = dfsan_sprint_origin_trace(&c, NULL, buf, kBufSize);
50 assert(kBufSize > length);
51
52 printf("==OUTPUT==\n\n%s==EOS==\n", buf);
53 // CHECK: ==OUTPUT==
54 // CHECK: Taint value 0x1 {{.*}} origin tracking ()
55 // CHECK: Origin value: {{.*}}, Taint value was stored to memory at
56 // CHECK: #0 {{.*}} in main {{.*}}origin_stack_trace.c:[[@LINE-23]]
57
58 // CHECK: Origin value: {{.*}}, Taint value was created at
59 // CHECK: #0 {{.*}} in bar.dfsan {{.*}}origin_stack_trace.c:[[@LINE-36]]
60 // CHECK-COUNT-8: #{{[0-9]+}} {{.*}} in bar.dfsan {{.*}}origin_stack_trace.c:[[@LINE-39]]
61 // CHECK: #9 {{.*}} in baz.dfsan {{.*}}origin_stack_trace.c:[[@LINE-34]]
62 // CHECK: ==EOS==
63
64 char tinybuf[18];
65 size_t same_length =
66 dfsan_sprint_origin_trace(&c, NULL, tinybuf, sizeof(tinybuf));
67
68 printf("==TRUNCATED OUTPUT==\n\n%s==EOS==\n", tinybuf);
69 // CHECK: ==TRUNCATED OUTPUT==
70 // CHECK: Taint value 0x1==EOS==
71
72 printf("Returned length: %zu\n", length);
73 printf("Actual length: %zu\n", strlen(buf));
74 printf("Returned length with truncation: %zu\n", same_length);
75
76 // CHECK: Returned length: [[#LEN:]]
77 // CHECK: Actual length: [[#LEN]]
78 // CHECK: Returned length with truncation: [[#LEN]]
79
80 size_t length_with_desc =
81 dfsan_sprint_origin_trace(&c, "DESCRIPTION", buf, kBufSize);
82 assert(kBufSize > length_with_desc);
83
84 printf("==OUTPUT==\n\n%s==EOS==\n", buf);
85 // CHECK: ==OUTPUT==
86 // CHECK: Taint value 0x1 {{.*}} origin tracking (DESCRIPTION)
87 // CHECK: Origin value: {{.*}}, Taint value was stored to memory at
88 // CHECK: #0 {{.*}} in main {{.*}}origin_stack_trace.c:[[@LINE-55]]
89
90 // CHECK: Origin value: {{.*}}, Taint value was created at
91 // CHECK: #0 {{.*}} in bar.dfsan {{.*}}origin_stack_trace.c:[[@LINE-68]]
92 // CHECK-COUNT-8: #{{[0-9]+}} {{.*}} in bar.dfsan {{.*}}origin_stack_trace.c:[[@LINE-71]]
93 // CHECK: #9 {{.*}} in baz.dfsan {{.*}}origin_stack_trace.c:[[@LINE-66]]
94 // CHECK: ==EOS==
95
96 printf("Returned length: %zu\n", length_with_desc);
97 // COMM: Message length is increased by 11: the length of "DESCRIPTION".
98 // CHECK: Returned length: [[#LEN + 11]]
99
100 buf[0] = '\0';
101 length = dfsan_sprint_origin_trace(&c, NULL, buf, 0);
102 printf("Output=\"%s\"\n", buf);
103 printf("Returned length: %zu\n", length);
104 // CHECK: Output=""
105 // CHECK: Returned length: [[#LEN]]
106
107 free(buf);
108 }
109