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Diffstat (limited to 'tests/stdio_test.cpp')
| -rw-r--r-- | tests/stdio_test.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp index 79a86ad2f..7e826124f 100644 --- a/tests/stdio_test.cpp +++ b/tests/stdio_test.cpp @@ -553,6 +553,21 @@ TEST(STDIO_TEST, snprintf_small_stack) { ASSERT_EQ(0, pthread_join(t, nullptr)); } +TEST(STDIO_TEST, snprintf_asterisk_overflow) { + char buf[128]; + ASSERT_EQ(5, snprintf(buf, sizeof(buf), "%.*s%c", 4, "hello world", '!')); + ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", INT_MAX/2, "hello world", '!')); + ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", INT_MAX-1, "hello world", '!')); + ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", INT_MAX, "hello world", '!')); + ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", -1, "hello world", '!')); + + // INT_MAX-1, INT_MAX, INT_MAX+1. + ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.2147483646s%c", "hello world", '!')); + ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.2147483647s%c", "hello world", '!')); + ASSERT_EQ(-1, snprintf(buf, sizeof(buf), "%.2147483648s%c", "hello world", '!')); + ASSERT_EQ(ENOMEM, errno); +} + TEST(STDIO_TEST, fprintf_failures_7229520) { // http://b/7229520 FILE* fp; |