derek.holloway
7502bf64a4
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32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
// RUN: %clang_analyze_cc1 %s \
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// RUN: -analyzer-checker=core,optin.taint \
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// RUN: -mllvm -debug-only=taint-checker \
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// RUN: 2>&1 | FileCheck %s
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// REQUIRES: asserts
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struct _IO_FILE;
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typedef struct _IO_FILE FILE;
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FILE *fopen(const char *fname, const char *mode);
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char *fgets(char *s, int n, FILE *fp); // no-definition
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void top(const char *fname, char *buf) {
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FILE *fp = fopen(fname, "r"); // Introduce taint.
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// CHECK: PreCall<fopen(fname, "r")> prepares tainting arg index: -1
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// CHECK-NEXT: PostCall<fopen(fname, "r")> actually wants to taint arg index: -1
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if (!fp)
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return;
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(void)fgets(buf, 42, fp); // Trigger taint propagation.
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// CHECK-NEXT: PreCall<fgets(buf, 42, fp)> prepares tainting arg index: -1
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// CHECK-NEXT: PreCall<fgets(buf, 42, fp)> prepares tainting arg index: 0
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// CHECK-NEXT: PreCall<fgets(buf, 42, fp)> prepares tainting arg index: 2
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//
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// CHECK-NEXT: PostCall<fgets(buf, 42, fp)> actually wants to taint arg index: -1
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// CHECK-NEXT: PostCall<fgets(buf, 42, fp)> actually wants to taint arg index: 0
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// CHECK-NEXT: PostCall<fgets(buf, 42, fp)> actually wants to taint arg index: 2
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}
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