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| author | Magnus Lång <[email protected]> | 2016-05-23 15:41:31 +0200 |
|---|---|---|
| committer | Magnus Lång <[email protected]> | 2016-07-06 16:08:20 +0200 |
| commit | f0131c58c42a286c8b3f611b47106393a37197b6 (patch) | |
| tree | caefc37baef32b065e69f23cc363a83ff70dcd12 /erts/emulator/hipe/hipe_stack.h | |
| parent | 3b409021a70427bb2fe3834707edf822b6afce2d (diff) | |
| download | otp-f0131c58c42a286c8b3f611b47106393a37197b6.tar.gz otp-f0131c58c42a286c8b3f611b47106393a37197b6.tar.bz2 otp-f0131c58c42a286c8b3f611b47106393a37197b6.zip | |
check_process_code: Sweep HiPE stack for literals
Because check_process_code neglected checking the HiPE stack for
references to the literal area, such references would survive the purge
and subsequent deletion of a module and its literal area. These dangling
references would then cause incorrect behaviour or even hard crashes of
the VM.
By simply adding a scan of the HiPE stack to check_process_code and
erts_garbage_collect_literals, this problem is fixed.
In order to support full stack walks without deleting the graylimit
trap, a new stack walking interface function,
nstack_walk_init_sdesc_ignore_trap() was introduced.
Diffstat (limited to 'erts/emulator/hipe/hipe_stack.h')
| -rw-r--r-- | erts/emulator/hipe/hipe_stack.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/erts/emulator/hipe/hipe_stack.h b/erts/emulator/hipe/hipe_stack.h index 4ea7d5c031..afa0ed4256 100644 --- a/erts/emulator/hipe/hipe_stack.h +++ b/erts/emulator/hipe/hipe_stack.h @@ -131,5 +131,8 @@ static __inline__ void hipe_check_nstack(Process *p, unsigned nwords) */ extern Eterm *fullsweep_nstack(Process *p, Eterm *n_htop); extern void gensweep_nstack(Process *p, Eterm **ptr_old_htop, Eterm **ptr_n_htop); +extern Eterm *sweep_literals_nstack(Process *p, Eterm *n_htop, char *area, + Uint area_size); +extern int nstack_any_heap_ref_ptrs(Process *, char* mod_start, Uint mod_size); #endif /* HIPE_STACK_H */ |