Commit Graph

165 Commits

Author SHA1 Message Date
Jason Evans
5ff709c264 Normalize aligned allocation algorithms.
Normalize arena_palloc(), chunk_alloc_mmap_slow(), and
chunk_recycle_dss() to use the same algorithm for trimming
over-allocation.

Add the ALIGNMENT_ADDR2BASE(), ALIGNMENT_ADDR2OFFSET(), and
ALIGNMENT_CEILING() macros, and use them where appropriate.

Remove the run_size_p parameter from sa2u().

Fix a potential deadlock in chunk_recycle_dss() that was introduced by
eae269036c (Add alignment support to
chunk_alloc()).
2012-04-11 18:13:45 -07:00
Jason Evans
122449b073 Implement Valgrind support, redzones, and quarantine.
Implement Valgrind support, as well as the redzone and quarantine
features, which help Valgrind detect memory errors.  Redzones are only
implemented for small objects because the changes necessary to support
redzones around large and huge objects are complicated by in-place
reallocation, to the point that it isn't clear that the maintenance
burden is worth the incremental improvement to Valgrind support.

Merge arena_salloc() and arena_salloc_demote().

Refactor i[v]salloc() to expose the 'demote' option.
2012-04-11 11:46:18 -07:00
Jason Evans
fad100bc35 Remove arena_malloc_prechosen().
Remove arena_malloc_prechosen(), now that arena_malloc() can be invoked
in a way that is semantically equivalent.
2012-04-06 12:24:46 -07:00
Jason Evans
01b3fe55ff Add a0malloc(), a0calloc(), and a0free().
Add a0malloc(), a0calloc(), and a0free(), which are used by FreeBSD's
libc to allocate/deallocate TLS in static binaries.
2012-04-03 19:25:48 -07:00
Jason Evans
ae4c7b4b40 Clean up *PAGE* macros.
s/PAGE_SHIFT/LG_PAGE/g and s/PAGE_SIZE/PAGE/g.

Remove remnants of the dynamic-page-shift code.

Rename the "arenas.pagesize" mallctl to "arenas.page".

Remove the "arenas.chunksize" mallctl, which is redundant with
"opt.lg_chunk".
2012-04-02 07:04:34 -07:00
Jason Evans
09a0769ba7 Work around TLS deallocation via free().
glibc uses memalign()/free() to allocate/deallocate TLS, which means
that it is unsafe to set TLS variables as a side effect of free() --
they may already be deallocated.  Work around this by avoiding
tcache_create() within free().

Reported by Mike Hommey.
2012-03-30 12:11:03 -07:00
Jason Evans
cd9a1346e9 Implement tsd.
Implement tsd, which is a TLS/TSD abstraction that uses one or both
internally.  Modify bootstrapping such that no tsd's are utilized until
allocation is safe.

Remove malloc_[v]tprintf(), and use malloc_snprintf() instead.

Fix %p argument size handling in malloc_vsnprintf().

Fix a long-standing statistics-related bug in the "thread.arena"
mallctl that could cause crashes due to linked list corruption.
2012-03-23 15:14:55 -07:00
Jason Evans
4e2e3dd9cf Fix fork-related bugs.
Acquire/release arena bin locks as part of the prefork/postfork.  This
bug made deadlock in the child between fork and exec a possibility.

Split jemalloc_postfork() into jemalloc_postfork_{parent,child}() so
that the child can reinitialize mutexes rather than unlocking them.  In
practice, this bug tended not to cause problems.
2012-03-13 16:31:41 -07:00
Jason Evans
b172610317 Simplify small size class infrastructure.
Program-generate small size class tables for all valid combinations of
LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT.  Use the appropriate table to generate
all relevant data structures, and remove the distinction between
tiny/quantum/cacheline/subpage bins.

Remove --enable-dynamic-page-shift.  This option didn't prove useful in
practice, and it prevented optimizations.

Add Tilera architecture support.
2012-02-28 16:50:47 -08:00
Jason Evans
746868929a Remove highruns statistics. 2012-02-13 15:18:19 -08:00
Jason Evans
ef8897b4b9 Make 8-byte tiny size class non-optional.
When tiny size class support was first added, it was intended to support
truly tiny size classes (even 2 bytes).  However, this wasn't very
useful in practice, so the minimum tiny size class has been limited to
sizeof(void *) for a long time now.  This is too small to be standards
compliant, but other commonly used malloc implementations do not even
bother using a 16-byte quantum  on systems with vector units (SSE2+,
AltiVEC, etc.).  As such, it is safe in practice to support an 8-byte
tiny size class on 64-bit systems that support 16-byte types.
2012-02-13 15:03:59 -08:00
Jason Evans
962463d9b5 Streamline tcache-related malloc/free fast paths.
tcache_get() is inlined, so do the config_tcache check inside
tcache_get() and simplify its callers.

Make arena_malloc() an inline function, since it is part of the malloc()
fast path.

Remove conditional logic that cause build issues if --disable-tcache was
specified.
2012-02-13 12:29:49 -08:00
Jason Evans
fd56043c53 Remove magic.
Remove structure magic, because 1) it is no longer conditional, and 2)
it stopped being very effective at detecting memory corruption several
years ago.
2012-02-13 10:24:43 -08:00
Jason Evans
7372b15a31 Reduce cpp conditional logic complexity.
Convert configuration-related cpp conditional logic to use static
constant variables, e.g.:

  #ifdef JEMALLOC_DEBUG
    [...]
  #endif

becomes:

  if (config_debug) {
    [...]
  }

The advantage is clearer, more concise code.  The main disadvantage is
that data structures no longer have conditionally defined fields, so
they pay the cost of all fields regardless of whether they are used.  In
practice, this is only a minor concern; config_stats will go away in an
upcoming change, and config_prof is the only other major feature that
depends on more than a few special-purpose fields.
2012-02-10 20:22:09 -08:00
Jason Evans
7427525c28 Move repo contents in jemalloc/ to top level. 2011-03-31 20:36:17 -07:00