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Merge "Add a test for a possible overflow in *printf."

This commit is contained in:
Elliott Hughes 2016-02-07 05:35:34 +00:00 committed by Gerrit Code Review
parent 9c212fc436 8200e55d94
commit 3dbdb9dbe6
1 changed files with 15 additions and 0 deletions
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15
tests/stdio_test.cpp
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@ -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;