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Resolve bootstrapping issues when embedded in FreeBSD libc.

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b2c0d6322d (Add witness, a simple online
locking validator.) caused a broad propagation of tsd throughout the
internal API, but tsd_fetch() was designed to fail prior to tsd
bootstrapping.  Fix this by splitting tsd_t into non-nullable tsd_t and
nullable tsdn_t, and modifying all internal APIs that do not critically
rely on tsd to take nullable pointers.  Furthermore, add the
tsd_booted_get() function so that tsdn_fetch() can probe whether tsd
bootstrapping is complete and return NULL if not.  All dangerous
conversions of nullable pointers are tsdn_tsd() calls that assert-fail
on invalid conversion.
This commit is contained in:
Jason Evans
2016-05-10 22:21:10 -07:00
parent 0c12dcabc5
commit c1e00ef2a6
34 changed files with 1709 additions and 1556 deletions
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10
include/jemalloc/internal/witness.h
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@@ -75,23 +75,23 @@ void witness_init(witness_t *witness, const char *name, witness_rank_t rank,
typedef void (witness_lock_error_t)(const witness_list_t *, const witness_t *);
extern witness_lock_error_t *witness_lock_error;
#endif
void witness_lock(tsd_t *tsd, witness_t *witness);
void witness_unlock(tsd_t *tsd, witness_t *witness);
void witness_lock(tsdn_t *tsdn, witness_t *witness);
void witness_unlock(tsdn_t *tsdn, witness_t *witness);
#ifdef JEMALLOC_JET
typedef void (witness_owner_error_t)(const witness_t *);
extern witness_owner_error_t *witness_owner_error;
#endif
void witness_assert_owner(tsd_t *tsd, const witness_t *witness);
void witness_assert_owner(tsdn_t *tsdn, const witness_t *witness);
#ifdef JEMALLOC_JET
typedef void (witness_not_owner_error_t)(const witness_t *);
extern witness_not_owner_error_t *witness_not_owner_error;
#endif
void witness_assert_not_owner(tsd_t *tsd, const witness_t *witness);
void witness_assert_not_owner(tsdn_t *tsdn, const witness_t *witness);
#ifdef JEMALLOC_JET
typedef void (witness_lockless_error_t)(const witness_list_t *);
extern witness_lockless_error_t *witness_lockless_error;
#endif
void witness_assert_lockless(tsd_t *tsd);
void witness_assert_lockless(tsdn_t *tsdn);
void witnesses_cleanup(tsd_t *tsd);
void witness_fork_cleanup(tsd_t *tsd);