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llvm-project/compiler-rt/lib/sanitizer_common/tests/sanitizer_libc_test.cpp

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//===-- sanitizer_libc_test.cpp -------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Tests for sanitizer_libc.h.
//===----------------------------------------------------------------------===//
#include <algorithm>
#include <vector>
#include <stdio.h>
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_file.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "sanitizer_common/sanitizer_platform.h"
#include "gtest/gtest.h"
#if SANITIZER_WINDOWS
#define NOMINMAX
#include <windows.h>
#undef NOMINMAX
#endif
#if SANITIZER_POSIX
# include <sys/stat.h>
# include "sanitizer_common/sanitizer_posix.h"
#endif
using namespace __sanitizer;
// A regression test for internal_memmove() implementation.
TEST(SanitizerCommon, InternalMemmoveRegression) {
char src[] = "Hello World";
char *dest = src + 6;
__sanitizer::internal_memmove(dest, src, 5);
EXPECT_EQ(dest[0], src[0]);
EXPECT_EQ(dest[4], src[4]);
}
TEST(SanitizerCommon, mem_is_zero) {
size_t size = 128;
char *x = new char[size];
memset(x, 0, size);
for (size_t pos = 0; pos < size; pos++) {
x[pos] = 1;
for (size_t beg = 0; beg < size; beg++) {
for (size_t end = beg; end < size; end++) {
// fprintf(stderr, "pos %zd beg %zd end %zd \n", pos, beg, end);
if (beg <= pos && pos < end)
EXPECT_FALSE(__sanitizer::mem_is_zero(x + beg, end - beg));
else
EXPECT_TRUE(__sanitizer::mem_is_zero(x + beg, end - beg));
}
}
x[pos] = 0;
}
delete [] x;
}
struct stat_and_more {
struct stat st;
unsigned char z;
};
static void temp_file_name(char *buf, size_t bufsize, const char *prefix) {
#if SANITIZER_WINDOWS
buf[0] = '\0';
char tmp_dir[MAX_PATH];
if (!::GetTempPathA(MAX_PATH, tmp_dir))
return;
// GetTempFileNameA needs a MAX_PATH buffer.
char tmp_path[MAX_PATH];
if (!::GetTempFileNameA(tmp_dir, prefix, 0, tmp_path))
return;
internal_strncpy(buf, tmp_path, bufsize);
#else
const char *tmpdir = "/tmp";
#if SANITIZER_ANDROID
tmpdir = GetEnv("TMPDIR");
#endif
internal_snprintf(buf, bufsize, "%s/%sXXXXXX", tmpdir, prefix);
ASSERT_TRUE(mkstemp(buf));
#endif
}
static void Unlink(const char *path) {
#if SANITIZER_WINDOWS
// No sanitizer needs to delete a file on Windows yet. If we ever do, we can
// add a portable wrapper and test it from here.
::DeleteFileA(&path[0]);
#else
internal_unlink(path);
#endif
}
TEST(SanitizerCommon, FileOps) {
const char *str1 = "qwerty";
uptr len1 = internal_strlen(str1);
const char *str2 = "zxcv";
uptr len2 = internal_strlen(str2);
char tmpfile[128];
temp_file_name(tmpfile, sizeof(tmpfile), "sanitizer_common.fileops.tmp.");
fd_t fd = OpenFile(tmpfile, WrOnly);
ASSERT_NE(fd, kInvalidFd);
ASSERT_TRUE(WriteToFile(fd, "A", 1));
CloseFile(fd);
fd = OpenFile(tmpfile, WrOnly);
ASSERT_NE(fd, kInvalidFd);
#if SANITIZER_POSIX && !SANITIZER_MAC
EXPECT_EQ(internal_lseek(fd, 0, SEEK_END), 0u);
#endif
uptr bytes_written = 0;
EXPECT_TRUE(WriteToFile(fd, str1, len1, &bytes_written));
EXPECT_EQ(len1, bytes_written);
EXPECT_TRUE(WriteToFile(fd, str2, len2, &bytes_written));
EXPECT_EQ(len2, bytes_written);
CloseFile(fd);
EXPECT_TRUE(FileExists(tmpfile));
fd = OpenFile(tmpfile, RdOnly);
ASSERT_NE(fd, kInvalidFd);
#if SANITIZER_POSIX
// The stat wrappers are posix-only.
uptr fsize = internal_filesize(fd);
EXPECT_EQ(len1 + len2, fsize);
struct stat st1, st2, st3;
EXPECT_EQ(0u, internal_stat(tmpfile, &st1));
EXPECT_EQ(0u, internal_lstat(tmpfile, &st2));
EXPECT_EQ(0u, internal_fstat(fd, &st3));
EXPECT_EQ(fsize, (uptr)st3.st_size);
// Verify that internal_fstat does not write beyond the end of the supplied
// buffer.
struct stat_and_more sam;
memset(&sam, 0xAB, sizeof(sam));
EXPECT_EQ(0u, internal_fstat(fd, &sam.st));
EXPECT_EQ(0xAB, sam.z);
EXPECT_NE(0xAB, sam.st.st_size);
EXPECT_NE(0, sam.st.st_size);
#endif
char buf[64] = {};
uptr bytes_read = 0;
EXPECT_TRUE(ReadFromFile(fd, buf, len1, &bytes_read));
EXPECT_EQ(len1, bytes_read);
EXPECT_EQ(0, internal_memcmp(buf, str1, len1));
EXPECT_EQ((char)0, buf[len1 + 1]);
internal_memset(buf, 0, len1);
EXPECT_TRUE(ReadFromFile(fd, buf, len2, &bytes_read));
EXPECT_EQ(len2, bytes_read);
EXPECT_EQ(0, internal_memcmp(buf, str2, len2));
CloseFile(fd);
Unlink(tmpfile);
}
class SanitizerCommonFileTest : public ::testing::TestWithParam<uptr> {
void SetUp() override {
data_.resize(GetParam());
std::generate(data_.begin(), data_.end(), [] { return rand() % 256; });
temp_file_name(file_name_, sizeof(file_name_),
"sanitizer_common.ReadFile.tmp.");
if (FILE *f = fopen(file_name_, "wb")) {
if (!data_.empty())
fwrite(data_.data(), data_.size(), 1, f);
fclose(f);
}
}
void TearDown() override { Unlink(file_name_); }
protected:
char file_name_[256];
std::vector<char> data_;
};
TEST_P(SanitizerCommonFileTest, ReadFileToBuffer) {
char *buff;
uptr size;
uptr len;
EXPECT_TRUE(ReadFileToBuffer(file_name_, &buff, &len, &size));
EXPECT_EQ(data_, std::vector<char>(buff, buff + size));
UnmapOrDie(buff, len);
}
TEST_P(SanitizerCommonFileTest, ReadFileToBufferHalf) {
char *buff;
uptr size;
uptr len;
data_.resize(data_.size() / 2);
EXPECT_TRUE(ReadFileToBuffer(file_name_, &buff, &len, &size, data_.size()));
EXPECT_EQ(data_, std::vector<char>(buff, buff + size));
UnmapOrDie(buff, len);
}
TEST_P(SanitizerCommonFileTest, ReadFileToVector) {
InternalMmapVector<char> buff;
EXPECT_TRUE(ReadFileToVector(file_name_, &buff));
EXPECT_EQ(data_, std::vector<char>(buff.begin(), buff.end()));
}
TEST_P(SanitizerCommonFileTest, ReadFileToVectorHalf) {
InternalMmapVector<char> buff;
data_.resize(data_.size() / 2);
EXPECT_TRUE(ReadFileToVector(file_name_, &buff, data_.size()));
EXPECT_EQ(data_, std::vector<char>(buff.begin(), buff.end()));
}
INSTANTIATE_TEST_SUITE_P(FileSizes, SanitizerCommonFileTest,
::testing::Values(0, 1, 7, 13, 32, 4096, 4097, 1048575,
1048576, 1048577));
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);
}
TEST(SanitizerCommon, InternalWideStringFunctions) {
const wchar_t *emptystr = L"";
const wchar_t *samesizestr = L"1234567";
const wchar_t *shortstr = L"123";
const wchar_t *longerstr = L"123456789";
ASSERT_EQ(internal_wcslen(emptystr), 0ul);
ASSERT_EQ(internal_wcslen(samesizestr), 7ul);
ASSERT_EQ(internal_wcslen(shortstr), 3ul);
ASSERT_EQ(internal_wcslen(longerstr), 9ul);
ASSERT_EQ(internal_wcsnlen(emptystr, 7), 0ul);
ASSERT_EQ(internal_wcsnlen(samesizestr, 7), 7ul);
ASSERT_EQ(internal_wcsnlen(shortstr, 7), 3ul);
ASSERT_EQ(internal_wcsnlen(longerstr, 7), 7ul);
}
// FIXME: File manipulations are not yet supported on Windows
#if SANITIZER_POSIX && !SANITIZER_MAC
TEST(SanitizerCommon, InternalMmapWithOffset) {
char tmpfile[128];
temp_file_name(tmpfile, sizeof(tmpfile),
"sanitizer_common.internalmmapwithoffset.tmp.");
fd_t fd = OpenFile(tmpfile, RdWr);
ASSERT_NE(fd, kInvalidFd);
uptr page_size = GetPageSizeCached();
uptr res = internal_ftruncate(fd, page_size * 2);
ASSERT_FALSE(internal_iserror(res));
res = internal_lseek(fd, page_size, SEEK_SET);
ASSERT_FALSE(internal_iserror(res));
res = internal_write(fd, "AB", 2);
ASSERT_FALSE(internal_iserror(res));
char *p = (char *)MapWritableFileToMemory(nullptr, page_size, fd, page_size);
ASSERT_NE(nullptr, p);
ASSERT_EQ('A', p[0]);
ASSERT_EQ('B', p[1]);
CloseFile(fd);
UnmapOrDie(p, page_size);
internal_unlink(tmpfile);
}
#endif
TEST(SanitizerCommon, ReportFile) {
SpinMutex report_file_mu;
ReportFile report_file = {&report_file_mu, kStderrFd, "", "", 0};
char tmpfile[128];
temp_file_name(tmpfile, sizeof(tmpfile),
"dir/sanitizer_common.reportfile.tmp.");
report_file.SetReportPath(tmpfile);
const char *path = report_file.GetReportPath();
EXPECT_EQ(internal_strncmp(tmpfile, path, strlen(tmpfile)), 0);
// This will close tmpfile.
report_file.SetReportPath("stderr");
Unlink(tmpfile);
}
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