commit 07a16b33724c90c74a96e42f89ccd1ccdcccf2a7 Author: Nick Mathewson nickm@torproject.org Date: Tue Sep 2 13:29:11 2014 -0400

Add an assertion to read_file_to_str_until_eof

The clangalyzer doesn't believe our math here. I'm pretty sure our math is right. Also, add some unit tests. --- src/common/util.c | 1 + src/test/test_util.c | 25 +++++++++++++++++++++++++ 2 files changed, 26 insertions(+)

diff --git a/src/common/util.c b/src/common/util.c index 3f298cd..a7a7fcb 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -2357,6 +2357,7 @@ read_file_to_str_until_eof(int fd, size_t max_bytes_to_read, size_t *sz_out) pos += r; } while (r > 0 && pos < max_bytes_to_read);

+ tor_assert(pos < string_max); *sz_out = pos; string[pos] = '\0'; return string; diff --git a/src/test/test_util.c b/src/test/test_util.c index c32fadd..1b7c936 100644 --- a/src/test/test_util.c +++ b/src/test/test_util.c @@ -87,6 +87,20 @@ test_util_read_file_eof_tiny_limit(void *arg) }

static void +test_util_read_file_eof_one_loop_a(void *arg) +{ + (void)arg; + test_util_read_until_eof_impl("tor_test_fifo_1ka", 1024, 1023); +} + +static void +test_util_read_file_eof_one_loop_b(void *arg) +{ + (void)arg; + test_util_read_until_eof_impl("tor_test_fifo_1kb", 1024, 1024); +} + +static void test_util_read_file_eof_two_loops(void *arg) { (void)arg; @@ -98,6 +112,14 @@ test_util_read_file_eof_two_loops(void *arg) }

static void +test_util_read_file_eof_two_loops_b(void *arg) +{ + (void)arg; + + test_util_read_until_eof_impl("tor_test_fifo_2kb", 2048, 2048); +} + +static void test_util_read_file_eof_zero_bytes(void *arg) { (void)arg; @@ -3870,7 +3892,10 @@ struct testcase_t util_tests[] = { UTIL_TEST(make_environment, 0), UTIL_TEST(set_env_var_in_sl, 0), UTIL_TEST(read_file_eof_tiny_limit, 0), + UTIL_TEST(read_file_eof_one_loop_a, 0), + UTIL_TEST(read_file_eof_one_loop_b, 0), UTIL_TEST(read_file_eof_two_loops, 0), + UTIL_TEST(read_file_eof_two_loops_b, 0), UTIL_TEST(read_file_eof_zero_bytes, 0), UTIL_TEST(write_chunks_to_file, 0), UTIL_TEST(mathlog, 0),