From 28cbb997d66e4d1904a231bef1ce15c2cbb6bf73 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Mon, 30 Jul 2018 14:43:21 +0100 Subject: [PATCH] tests: add check_invalid_maps to test-mmap MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This adds a test to make sure we fail properly for a 0 length mmap. There are most likely other failure conditions we should also check. Signed-off-by: Alex Bennée Reviewed-by: Richard Henderson Cc: umarcor <1783362@bugs.launchpad.net> Message-Id: <20180730134321.19898-3-alex.bennee@linaro.org> Signed-off-by: Laurent Vivier --- tests/tcg/multiarch/test-mmap.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/tests/tcg/multiarch/test-mmap.c b/tests/tcg/multiarch/test-mmap.c index 5c0afe6e49..11d0e777b1 100644 --- a/tests/tcg/multiarch/test-mmap.c +++ b/tests/tcg/multiarch/test-mmap.c @@ -27,7 +27,7 @@ #include #include #include - +#include #include #define D(x) @@ -435,6 +435,25 @@ void checked_write(int fd, const void *buf, size_t count) fail_unless(rc == count); } +void check_invalid_mmaps(void) +{ + unsigned char *addr; + + /* Attempt to map a zero length page. */ + addr = mmap(NULL, 0, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + fprintf(stdout, "%s addr=%p", __func__, (void *)addr); + fail_unless(addr == MAP_FAILED); + fail_unless(errno == EINVAL); + + /* Attempt to map a over length page. */ + addr = mmap(NULL, -4, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + fprintf(stdout, "%s addr=%p", __func__, (void *)addr); + fail_unless(addr == MAP_FAILED); + fail_unless(errno == ENOMEM); + + fprintf(stdout, " passed\n"); +} + int main(int argc, char **argv) { char tempname[] = "/tmp/.cmmapXXXXXX"; @@ -476,6 +495,7 @@ int main(int argc, char **argv) check_file_fixed_mmaps(); check_file_fixed_eof_mmaps(); check_file_unfixed_eof_mmaps(); + check_invalid_mmaps(); /* Fails at the moment. */ /* check_aligned_anonymous_fixed_mmaps_collide_with_host(); */