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tests: add check_invalid_maps to test-mmap 

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 <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Cc: umarcor <1783362@bugs.launchpad.net>
Message-Id: <20180730134321.19898-3-alex.bennee@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Alex Bennée 2018-07-30 14:43:21 +01:00 committed by Laurent Vivier
parent 38138fab93
commit 28cbb997d6
1 changed files with 21 additions and 1 deletions
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22
tests/tcg/multiarch/test-mmap.c
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@ -27,7 +27,7 @@
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#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(); */