1 // RUN: %clangxx -fsanitize=float-cast-overflow %s -o %t
2 // RUN: %run %t _
3 // RUN: %env_ubsan_opts=print_summary=1:report_error_type=1 %run %t 0 2>&1 | FileCheck %s --check-prefix=CHECK-0
4 // RUN: %run %t 1 2>&1 | FileCheck %s --check-prefix=CHECK-1
5 // RUN: %run %t 2 2>&1 | FileCheck %s --check-prefix=CHECK-2
6 // RUN: %run %t 3 2>&1 | FileCheck %s --check-prefix=CHECK-3
7 // RUN: %run %t 4 2>&1 | FileCheck %s --check-prefix=CHECK-4
8 // RUN: %run %t 5 2>&1 | FileCheck %s --check-prefix=CHECK-5
9 // RUN: %run %t 6 2>&1 | FileCheck %s --check-prefix=CHECK-6
10 // FIXME: %run %t 7 2>&1 | FileCheck %s --check-prefix=CHECK-7
11 // FIXME: not %run %t 8 2>&1 | FileCheck %s --check-prefix=CHECK-8
12 // RUN: not %run %t 9 2>&1 | FileCheck %s --check-prefix=CHECK-9
13
14 // Issue #41838
15 // XFAIL: sparc-target-arch && target={{.*solaris.*}}
16
17 // This test assumes float and double are IEEE-754 single- and double-precision.
18
19 #if defined(__APPLE__)
20 # include <machine/endian.h>
21 # define BYTE_ORDER __DARWIN_BYTE_ORDER
22 # define BIG_ENDIAN __DARWIN_BIG_ENDIAN
23 # define LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN
24 #elif defined(__FreeBSD__) || defined(__NetBSD__)
25 # include <sys/endian.h>
26 # ifndef BYTE_ORDER
27 # define BYTE_ORDER _BYTE_ORDER
28 # endif
29 # ifndef BIG_ENDIAN
30 # define BIG_ENDIAN _BIG_ENDIAN
31 # endif
32 # ifndef LITTLE_ENDIAN
33 # define LITTLE_ENDIAN _LITTLE_ENDIAN
34 # endif
35 #elif defined(__sun__) && defined(__svr4__)
36 // Solaris provides _BIG_ENDIAN/_LITTLE_ENDIAN selector in sys/types.h.
37 # include <sys/types.h>
38 # define BIG_ENDIAN 4321
39 # define LITTLE_ENDIAN 1234
40 # if defined(_BIG_ENDIAN)
41 # define BYTE_ORDER BIG_ENDIAN
42 # else
43 # define BYTE_ORDER LITTLE_ENDIAN
44 # endif
45 #elif defined(_WIN32)
46 # define BYTE_ORDER 0
47 # define BIG_ENDIAN 1
48 # define LITTLE_ENDIAN 0
49 #else
50 # include <endian.h>
51 # define BYTE_ORDER __BYTE_ORDER
52 # define BIG_ENDIAN __BIG_ENDIAN
53 # define LITTLE_ENDIAN __LITTLE_ENDIAN
54 #endif // __APPLE__
55 #include <stdint.h>
56 #include <stdio.h>
57 #include <string.h>
58
59 float Inf;
60 float NaN;
61
main(int argc,char ** argv)62 int main(int argc, char **argv) {
63 float MaxFloatRepresentableAsInt = 0x7fffff80;
64 (int)MaxFloatRepresentableAsInt; // ok
65 (int)-MaxFloatRepresentableAsInt; // ok
66
67 float MinFloatRepresentableAsInt = -0x7fffffff - 1;
68 (int)MinFloatRepresentableAsInt; // ok
69
70 float MaxFloatRepresentableAsUInt = 0xffffff00u;
71 (unsigned int)MaxFloatRepresentableAsUInt; // ok
72
73 #ifdef __SIZEOF_INT128__
74 unsigned __int128 FloatMaxAsUInt128 = -((unsigned __int128)1 << 104);
75 (void)(float)FloatMaxAsUInt128; // ok
76 #endif
77
78 float NearlyMinusOne = -0.99999;
79 unsigned Zero = NearlyMinusOne; // ok
80
81 // Build a '+Inf'.
82 #if BYTE_ORDER == LITTLE_ENDIAN
83 unsigned char InfVal[] = { 0x00, 0x00, 0x80, 0x7f };
84 #else
85 unsigned char InfVal[] = { 0x7f, 0x80, 0x00, 0x00 };
86 #endif
87 float Inf;
88 memcpy(&Inf, InfVal, 4);
89
90 // Build a 'NaN'.
91 #if BYTE_ORDER == LITTLE_ENDIAN
92 unsigned char NaNVal[] = { 0x01, 0x00, 0x80, 0x7f };
93 #else
94 unsigned char NaNVal[] = { 0x7f, 0x80, 0x00, 0x01 };
95 #endif
96 float NaN;
97 memcpy(&NaN, NaNVal, 4);
98
99 double DblInf = (double)Inf; // ok
100
101 switch (argv[1][0]) {
102 // FIXME: Produce a source location for these checks and test for it here.
103
104 // Floating point -> integer overflow.
105 case '0': {
106 // Note that values between 0x7ffffe00 and 0x80000000 may or may not
107 // successfully round-trip, depending on the rounding mode.
108 // CHECK-0: {{.*}}cast-overflow.cpp:[[@LINE+1]]:27: runtime error: 2.14748{{.*}} is outside the range of representable values of type 'int'
109 static int test_int = MaxFloatRepresentableAsInt + 0x80;
110 // CHECK-0: SUMMARY: {{.*}}Sanitizer: float-cast-overflow {{.*}}cast-overflow.cpp:[[@LINE-1]]
111 return 0;
112 }
113 case '1': {
114 // CHECK-1: {{.*}}cast-overflow.cpp:[[@LINE+1]]:27: runtime error: -2.14748{{.*}} is outside the range of representable values of type 'int'
115 static int test_int = MinFloatRepresentableAsInt - 0x100;
116 return 0;
117 }
118 case '2': {
119 // CHECK-2: {{.*}}cast-overflow.cpp:[[@LINE+2]]:37: runtime error: -1 is outside the range of representable values of type 'unsigned int'
120 volatile float f = -1.0;
121 volatile unsigned u = (unsigned)f;
122 return 0;
123 }
124 case '3': {
125 // CHECK-3: {{.*}}cast-overflow.cpp:[[@LINE+1]]:37: runtime error: 4.2949{{.*}} is outside the range of representable values of type 'unsigned int'
126 static int test_int = (unsigned)(MaxFloatRepresentableAsUInt + 0x100);
127 return 0;
128 }
129
130 case '4': {
131 // CHECK-4: {{.*}}cast-overflow.cpp:[[@LINE+1]]:27: runtime error: {{.*}} is outside the range of representable values of type 'int'
132 static int test_int = Inf;
133 return 0;
134 }
135 case '5': {
136 // CHECK-5: {{.*}}cast-overflow.cpp:[[@LINE+1]]:27: runtime error: {{.*}} is outside the range of representable values of type 'int'
137 static int test_int = NaN;
138 return 0;
139 }
140
141 // Integer -> floating point overflow.
142 case '6': {
143 // CHECK-6: cast-overflow.cpp:[[@LINE+2]]:{{27: runtime error: 3.40282e\+38 is outside the range of representable values of type 'int'| __int128 not supported}}
144 #if defined(__SIZEOF_INT128__) && !defined(_WIN32)
145 static int test_int = (float)(FloatMaxAsUInt128 + 1);
146 return 0;
147 #else
148 // Print the same line as the check above. That way the test is robust to
149 // line changes around it
150 printf("%s:%d: __int128 not supported", __FILE__, __LINE__ - 5);
151 return 0;
152 #endif
153 }
154 // FIXME: The backend cannot lower __fp16 operations on x86 yet.
155 //case '7':
156 // (__fp16)65504; // ok
157 // // CHECK-7: runtime error: 65505 is outside the range of representable values of type '__fp16'
158 // return (__fp16)65505;
159
160 // Floating point -> floating point overflow.
161 case '8':
162 // CHECK-8: {{.*}}cast-overflow.cpp:[[@LINE+1]]:19: runtime error: 1e+39 is outside the range of representable values of type 'float'
163 return (float)1e39;
164 case '9':
165 volatile long double ld = 300.0;
166 // CHECK-9: {{.*}}cast-overflow.cpp:[[@LINE+1]]:14: runtime error: 300 is outside the range of representable values of type 'char'
167 char c = ld;
168 return c;
169 }
170 }
171