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author | Anna Zaks <ganna@apple.com> | 2015-11-20 18:42:05 +0000 |
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committer | Anna Zaks <ganna@apple.com> | 2015-11-20 18:42:05 +0000 |
commit | 19064f3963aeae33978242c7a0a1f93f092a3fe8 (patch) | |
tree | f65d69027690049daf0e97697c60216cf7a550ac /lib/sanitizer_common/tests | |
parent | dc4a93dca06f8f55c14d9d97ab29b54520e5419c (diff) | |
download | compiler-rt-19064f3963aeae33978242c7a0a1f93f092a3fe8.tar.gz |
[compiler-rt] Add internal implementations for strlcat and strlcpy
The compiler-rt should make use of strlcpy() rather than strncpy(). Using internal_strncpy() may be fine with appropriate bounds checking or enforcement of nul-termination elsewhere, but it's just good practice these days to avoid using strncpy() in new code.
A patch by Jeremy Sequoia!
Differential Revision: http://reviews.llvm.org/D14714
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@253690 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/sanitizer_common/tests')
-rw-r--r-- | lib/sanitizer_common/tests/sanitizer_libc_test.cc | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/sanitizer_common/tests/sanitizer_libc_test.cc b/lib/sanitizer_common/tests/sanitizer_libc_test.cc index c0230ec6a..b09d37352 100644 --- a/lib/sanitizer_common/tests/sanitizer_libc_test.cc +++ b/lib/sanitizer_common/tests/sanitizer_libc_test.cc @@ -8,6 +8,7 @@ //===----------------------------------------------------------------------===// // Tests for sanitizer_libc.h. //===----------------------------------------------------------------------===// +#include <algorithm> #include "sanitizer_common/sanitizer_common.h" #include "sanitizer_common/sanitizer_libc.h" @@ -145,12 +146,65 @@ TEST(SanitizerCommon, FileOps) { #endif } +static const size_t kStrlcpyBufSize = 8; +void test_internal_strlcpy(char *dbuf, const char *sbuf) { + uptr retval = 0; + retval = internal_strlcpy(dbuf, sbuf, kStrlcpyBufSize); + EXPECT_EQ(internal_strncmp(dbuf, sbuf, kStrlcpyBufSize - 1), 0); + EXPECT_EQ(internal_strlen(dbuf), + std::min(internal_strlen(sbuf), (uptr)(kStrlcpyBufSize - 1))); + EXPECT_EQ(retval, internal_strlen(sbuf)); + + // Test with shorter maxlen. + uptr maxlen = 2; + if (internal_strlen(sbuf) > maxlen) { + retval = internal_strlcpy(dbuf, sbuf, maxlen); + EXPECT_EQ(internal_strncmp(dbuf, sbuf, maxlen - 1), 0); + EXPECT_EQ(internal_strlen(dbuf), maxlen - 1); + } +} + TEST(SanitizerCommon, InternalStrFunctions) { const char *haystack = "haystack"; EXPECT_EQ(haystack + 2, internal_strchr(haystack, 'y')); EXPECT_EQ(haystack + 2, internal_strchrnul(haystack, 'y')); EXPECT_EQ(0, internal_strchr(haystack, 'z')); EXPECT_EQ(haystack + 8, internal_strchrnul(haystack, 'z')); + + char dbuf[kStrlcpyBufSize] = {}; + const char *samesizestr = "1234567"; + const char *shortstr = "123"; + const char *longerstr = "123456789"; + + // Test internal_strlcpy. + internal_strlcpy(dbuf, shortstr, 0); + EXPECT_EQ(dbuf[0], 0); + EXPECT_EQ(dbuf[0], 0); + test_internal_strlcpy(dbuf, samesizestr); + test_internal_strlcpy(dbuf, shortstr); + test_internal_strlcpy(dbuf, longerstr); + + // Test internal_strlcat. + char dcatbuf[kStrlcpyBufSize] = {}; + uptr retval = 0; + retval = internal_strlcat(dcatbuf, "aaa", 0); + EXPECT_EQ(internal_strlen(dcatbuf), (uptr)0); + EXPECT_EQ(retval, (uptr)3); + + retval = internal_strlcat(dcatbuf, "123", kStrlcpyBufSize); + EXPECT_EQ(internal_strcmp(dcatbuf, "123"), 0); + EXPECT_EQ(internal_strlen(dcatbuf), (uptr)3); + EXPECT_EQ(retval, (uptr)3); + + retval = internal_strlcat(dcatbuf, "123", kStrlcpyBufSize); + EXPECT_EQ(internal_strcmp(dcatbuf, "123123"), 0); + EXPECT_EQ(internal_strlen(dcatbuf), (uptr)6); + EXPECT_EQ(retval, (uptr)6); + + retval = internal_strlcat(dcatbuf, "123", kStrlcpyBufSize); + EXPECT_EQ(internal_strcmp(dcatbuf, "1231231"), 0); + EXPECT_EQ(internal_strlen(dcatbuf), (uptr)7); + EXPECT_EQ(retval, (uptr)9); } // FIXME: File manipulations are not yet supported on Windows |