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8e75de2100
The last argument is expected to be the destination buffer size (or less).
Detects if it points to destination buffer size directly or via a variable.
Detects if it is an integral, try to detect if the destination buffer can receive the source length.
Updating bsd-string.c unit tests as it make it fails now.
Reviewers: george.karpenpov, NoQ
Reviewed By: george.karpenkov
Differential Revision: https://reviews.llvm.org/D48884
llvm-svn: 337499
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
// RUN: %clang_analyze_cc1 -analyzer-checker=core,unix.cstring.NullArg,alpha.unix.cstring,debug.ExprInspection -analyzer-store=region -verify %s
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#define NULL ((void *)0)
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typedef __typeof(sizeof(int)) size_t;
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size_t strlcpy(char *dst, const char *src, size_t n);
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size_t strlcat(char *dst, const char *src, size_t n);
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void clang_analyzer_eval(int);
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void f1() {
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char overlap[] = "123456789";
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strlcpy(overlap, overlap + 1, 3); // expected-warning{{Arguments must not be overlapping buffers}}
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}
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void f2() {
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char buf[5];
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strlcpy(buf, "abcd", sizeof(buf)); // expected-no-warning
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strlcat(buf, "efgh", sizeof(buf)); // expected-warning{{Size argument is greater than the free space in the destination buffer}}
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}
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void f3() {
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char dst[2];
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const char *src = "abdef";
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strlcpy(dst, src, 5); // expected-warning{{Size argument is greater than the length of the destination buffer}}
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}
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void f4() {
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strlcpy(NULL, "abcdef", 6); // expected-warning{{Null pointer argument in call to string copy function}}
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}
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void f5() {
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strlcat(NULL, "abcdef", 6); // expected-warning{{Null pointer argument in call to string copy function}}
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}
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void f6() {
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char buf[8];
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strlcpy(buf, "abc", 3);
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size_t len = strlcat(buf, "defg", 4);
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clang_analyzer_eval(len == 7); // expected-warning{{TRUE}}
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}
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int f7() {
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char buf[8];
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return strlcpy(buf, "1234567", 0); // no-crash
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}
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