false-positive-suppression.c revision 702077f14100f2d7acdb12ad49b53e64efc37d72
1b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-config suppress-null-return-paths=false -verify %s 26a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose// RUN: %clang_cc1 -analyze -analyzer-checker=core -verify -DSUPPRESSED=1 %s 36a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-config avoid-suppressing-null-argument-paths=true -DSUPPRESSED=1 -DNULL_ARGS=1 -verify %s 4b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 5b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Roseint opaquePropertyCheck(void *object); 6b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Roseint coin(); 7b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 86a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Roseint *getNull() { 96a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return 0; 106a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 116a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 12c1bef5671e682de5a573c7c6b66871b36de0ec61Anna Zaksint* getPtr(); 13c1bef5671e682de5a573c7c6b66871b36de0ec61Anna Zaks 14b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Roseint *dynCastToInt(void *ptr) { 15b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose if (opaquePropertyCheck(ptr)) 16b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose return (int *)ptr; 17b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose return 0; 18b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 19b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 20b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Roseint *dynCastOrNull(void *ptr) { 21b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose if (!ptr) 22b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose return 0; 23b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose if (opaquePropertyCheck(ptr)) 24b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose return (int *)ptr; 25b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose return 0; 26b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 27b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 28b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 29b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rosevoid testDynCast(void *p) { 30b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose int *casted = dynCastToInt(p); 31b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose *casted = 1; 32b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#ifndef SUPPRESSED 33b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 34b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#endif 35b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 36b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 37b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rosevoid testDynCastOrNull(void *p) { 38b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose int *casted = dynCastOrNull(p); 39b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose *casted = 1; 40b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#ifndef SUPPRESSED 41b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 42b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#endif 43b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 44b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 45b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 46b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rosevoid testBranch(void *p) { 47b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose int *casted; 48b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 49b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // Although the report will be suppressed on one branch, it should still be 50b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // valid on the other. 51b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose if (coin()) { 52b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose casted = dynCastToInt(p); 53b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose } else { 54b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose if (p) 55b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose return; 56b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose casted = (int *)p; 57b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose } 58b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 59b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose *casted = 1; // expected-warning {{Dereference of null pointer}} 60b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 61b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 62b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rosevoid testBranchReversed(void *p) { 63b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose int *casted; 64b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 65b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // Although the report will be suppressed on one branch, it should still be 66b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // valid on the other. 67b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose if (coin()) { 68b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose if (p) 69b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose return; 70b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose casted = (int *)p; 71b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose } else { 72b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose casted = dynCastToInt(p); 73b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose } 74b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 75b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose *casted = 1; // expected-warning {{Dereference of null pointer}} 76b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 77b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 786f4160828db75f36b22a204da202723c592644f3Jordan Rosevoid testMultipleStore(void *p) { 796f4160828db75f36b22a204da202723c592644f3Jordan Rose int *casted = 0; 806f4160828db75f36b22a204da202723c592644f3Jordan Rose casted = dynCastToInt(p); 816f4160828db75f36b22a204da202723c592644f3Jordan Rose *casted = 1; 826f4160828db75f36b22a204da202723c592644f3Jordan Rose#ifndef SUPPRESSED 836f4160828db75f36b22a204da202723c592644f3Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 846f4160828db75f36b22a204da202723c592644f3Jordan Rose#endif 856f4160828db75f36b22a204da202723c592644f3Jordan Rose} 866f4160828db75f36b22a204da202723c592644f3Jordan Rose 87b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 886a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose// -------------------------- 896a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose// "Suppression suppression" 906a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose// -------------------------- 916a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 926a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testDynCastOrNullOfNull() { 936a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // Don't suppress when one of the arguments is NULL. 946a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = dynCastOrNull(0); 956a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose *casted = 1; 966a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#if !SUPPRESSED || NULL_ARGS 976a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 986a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#endif 996a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1006a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1016a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testDynCastOfNull() { 1026a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // Don't suppress when one of the arguments is NULL. 1036a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = dynCastToInt(0); 1046a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose *casted = 1; 1056a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#if !SUPPRESSED || NULL_ARGS 1066a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 1076a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#endif 1086a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1096a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1106a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Roseint *lookUpInt(int unused) { 1116a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose if (coin()) 1126a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return 0; 1136a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose static int x; 1146a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return &x; 1156a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1166a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1176a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testZeroIsNotNull() { 1186a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // /Do/ suppress when the argument is 0 (an integer). 1196a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = lookUpInt(0); 1206a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose *casted = 1; 1216a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#ifndef SUPPRESSED 1226a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 1236a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#endif 1246a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1256a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1266a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testTrackNull() { 1276a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // /Do/ suppress if the null argument came from another call returning null. 1286a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = dynCastOrNull(getNull()); 1296a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose *casted = 1; 1306a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#ifndef SUPPRESSED 1316a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 1326a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#endif 1336a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1346a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1356a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testTrackNullVariable() { 1366a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // /Do/ suppress if the null argument came from another call returning null. 1376a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *ptr; 1386a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose ptr = getNull(); 1396a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = dynCastOrNull(ptr); 1406a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose *casted = 1; 1416a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#ifndef SUPPRESSED 1426a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 1436a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#endif 1446a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1456a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1466a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 147b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose// --------------------------------------- 148b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose// FALSE NEGATIVES (over-suppression) 149b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose// --------------------------------------- 150b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 1516a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testNoArguments() { 1526a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // In this case the function has no branches, and MUST return null. 1536a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = getNull(); 1546a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose *casted = 1; 1556a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#ifndef SUPPRESSED 1566a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 1576a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose#endif 1586a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1596a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1606a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Roseint *getNullIfNonNull(void *input) { 1616a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose if (input) 1626a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return 0; 1636a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose static int x; 1646a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return &x; 1656a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1666a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1676a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testKnownPath(void *input) { 1686a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose if (!input) 1696a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return; 1706a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 171b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // In this case we have a known value for the argument, and thus the path 172b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // through the function doesn't ever split. 1736a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = getNullIfNonNull(input); 174b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose *casted = 1; 175b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#ifndef SUPPRESSED 176b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 177b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#endif 178b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 179b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 1806a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Roseint *alwaysReturnNull(void *input) { 1816a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose if (opaquePropertyCheck(input)) 1826a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return 0; 1836a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose return 0; 1846a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose} 1856a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose 1866a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rosevoid testAlwaysReturnNull(void *input) { 187b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // In this case all paths out of the function return 0, but they are all 188b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // dominated by a branch whose condition we don't know! 1896a329ee7567cf3267ffab2bc755ea8c773d967e7Jordan Rose int *casted = alwaysReturnNull(input); 190b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose *casted = 1; 191b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#ifndef SUPPRESSED 192b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose // expected-warning@-2 {{Dereference of null pointer}} 193b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose#endif 194b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose} 195b9d4e5e3bb235f1149e99d3c833ff7cb3474c9f1Jordan Rose 196dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaksint derefArg(int *p) { 197dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks return *p; 198dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks#ifndef SUPPRESSED 199dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks // expected-warning@-2 {{Dereference of null pointer}} 200dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks#endif 201dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks} 202dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaksvoid ternaryArg(char cond) { 203dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks static int x; 204dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks derefArg(cond ? &x : getNull()); 205dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks} 206dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks 207f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaksint derefArgCast(char *p) { 208f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks return *p; 209f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks#ifndef SUPPRESSED 210f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks // expected-warning@-2 {{Dereference of null pointer}} 211f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks#endif 212f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks} 213f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaksvoid ternaryArgCast(char cond) { 214f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks static int x; 215f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks derefArgCast((char*)((unsigned)cond ? &x : getNull())); 216f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks} 217f510f5cd57fa9b7ea6f6e103c65c0df95a55d986Anna Zaks 218dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaksint derefAssignment(int *p) { 219dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks return *p; 220dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks#ifndef SUPPRESSED 221dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks // expected-warning@-2 {{Dereference of null pointer}} 222dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks#endif 223dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks} 224c1bef5671e682de5a573c7c6b66871b36de0ec61Anna Zaks 225dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaksvoid ternaryAssignment(char cond) { 226dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks static int x; 227c1bef5671e682de5a573c7c6b66871b36de0ec61Anna Zaks int *p = cond ? getNull() : getPtr(); 228dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks derefAssignment(p); 229dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks} 230dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks 231dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaksint *retNull(char cond) { 232dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks static int x; 233dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks return cond ? &x : getNull(); 234dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks} 235dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaksint ternaryRetNull(char cond) { 236dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks int *p = retNull(cond); 237dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks return *p; 238dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks#ifndef SUPPRESSED 239dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks // expected-warning@-2 {{Dereference of null pointer}} 240dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks#endif 241dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks} 242dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks 243cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks// Test suppression of nested conditional operators. 244cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaksint testConditionalOperatorSuppress(int x) { 245cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks return *(x ? getNull() : getPtr()); 246cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks#ifndef SUPPRESSED 247cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks // expected-warning@-2 {{Dereference of null pointer}} 248cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks#endif 249cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks} 250cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaksint testNestedConditionalOperatorSuppress(int x) { 251cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks return *(x ? (x ? getNull() : getPtr()) : getPtr()); 252cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks#ifndef SUPPRESSED 253cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks // expected-warning@-2 {{Dereference of null pointer}} 254cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks#endif 255cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks} 256cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaksint testConditionalOperator(int x) { 257cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks return *(x ? 0 : getPtr()); // expected-warning {{Dereference of null pointer}} 258cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks} 259cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaksint testNestedConditionalOperator(int x) { 260cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks return *(x ? (x ? 0 : getPtr()) : getPtr()); // expected-warning {{Dereference of null pointer}} 261cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks} 262cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks 263cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaksint testConditionalOperatorSuppressFloatCond(float x) { 264702077f14100f2d7acdb12ad49b53e64efc37d72Anna Zaks return *(x ? getNull() : getPtr()); 265702077f14100f2d7acdb12ad49b53e64efc37d72Anna Zaks#ifndef SUPPRESSED 266702077f14100f2d7acdb12ad49b53e64efc37d72Anna Zaks // expected-warning@-2 {{Dereference of null pointer}} 267702077f14100f2d7acdb12ad49b53e64efc37d72Anna Zaks#endif 268cabc3fddae63f5eb3bd44bdecce7a3fbd69421a9Anna Zaks} 269dc9c160dede7e2f5cc11755db6aaa57e7fccbcecAnna Zaks 270