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[LibOS] Error out on anonymous shared mappings in mmap syscall #2147

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[LibOS] Error out on anonymous shared mappings in mmap syscall #2147

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a77e183
[LibOS] Error out on anonymous shared mappings in mmap syscall
mkow Feb 8, 2021
5b67047
fixup! [LibOS] Error out on anonymous shared mappings in mmap syscall
mkow Feb 8, 2021
5dbf2a6
[DO NOT MERGE] testing which apps fail...
mkow Feb 8, 2021
36f90a6
[DO NOT MERGE] testing which apps fail...
mkow Feb 8, 2021
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2 changes: 2 additions & 0 deletions LibOS/shim/src/sys/shim_mmap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,8 @@ void* shim_do_mmap(void* addr, size_t length, int prot, int flags, int fd, off_t
if (flags & MAP_ANONYMOUS) {
switch (flags & MAP_TYPE) {
case MAP_SHARED:
/* PAL API doesn't support anonymous shared memory. */
return (void*)-ENOSYS;
case MAP_PRIVATE:
break;
default:
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4 changes: 4 additions & 0 deletions LibOS/shim/test/ltp/ltp.cfg
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Expand Up @@ -676,6 +676,10 @@ skip = yes
[futex_cmp_requeue01]
skip = yes

# uses anonymous shared mappings (which are not supported)
[futex_cmp_requeue02]
skip = yes

# always fails to open /proc/PID/stat, but the whole test fails only sometimes
[futex_wait02]
skip = yes
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