Replace-malloc libraries, such as DMD, don't really need to care about
the details of implementing all the variants of aligned memory
allocation functions. Currently, by defining MOZ_REPLACE_ONLY_MEMALIGN
before including replace_malloc.h, they get predefined functions.
Instead of making that an opt-in at build time, we make the
replace-malloc initialization just fill the replace-malloc
malloc_table_t with implementations that rely on the replace_memalign
the library provides.
--HG--
extra : rebase_source : 0842a67d9bc27a9a86c33d14d98b9c25f39982fb
Until now, the malloc implementation functions would call the
replace-malloc functions if they exist, and fallback to the real
allocator in no such function exists. Instead of doing this, we now
fill the empty slots in the malloc_table_t with the real allocator
functions.
--HG--
extra : rebase_source : b54634f23188906939e4dc01fc5a3007de0f3f2c
We make replace_malloc_init_funcs called on all platforms and fill out a
malloc_table_t for the replace-malloc functions with what comes from
dlsym/GetProcAddress on Android/Windows, and from the dynamically linked
weak symbols replace_* on other platforms.
replace_malloc.h contains definitions of *_impl_t types for each of the
functions in the malloc_table_t, which is redundant with the
replace_*_impl_t types we were creating, so we remove those typedefs,
except for the two functions (init and get_bridge) that don't have such
a typedef. Those functions don't appear in malloc_table_t.
--HG--
extra : rebase_source : 3705a99ee07f63dbaa66973eef19ddab224e0911
We want, in a subsequent patch, to have replace_malloc_init_funcs be
called on all platforms (including those relying on the replace-malloc
library being loaded already) and perform more initialization.
To prepare for that, we move the non-platform-specific pieces out.
--HG--
extra : rebase_source : 239ed363ee168bf4f8a96e0a1ca52981cb941b71
All the _impl functions in replace-malloc.c are largely identical. This
replaces all of them with macro expansions.
--HG--
extra : rebase_source : 67a1809b0b0fc4645ea5041154fa3a6dcb6cce6b
This makes no significant difference in practice in the macro
expansions, but will help down the line.
--HG--
extra : rebase_source : 6d61c1f28c558321478d7e5f26390d27ae8ae3ac
MOZ_REPLACE_JEMALLOC was only defined when building jemalloc4 as a
replace-malloc library.
--HG--
extra : rebase_source : fa5c402da07fa96448c170b6db99629469691efe
This avoids many additions of `extern "C"` in C++ code and will avoid
having to do the same to mozjemalloc once built as C++.
--HG--
extra : rebase_source : af55696262f40a9dd16a19c29edcb9bb307d4957
This avoids many additions of `extern "C"` in C++ code and will avoid
having to do the same to mozjemalloc once built as C++.
--HG--
extra : rebase_source : af55696262f40a9dd16a19c29edcb9bb307d4957
NO_TLS used to be hardcoded on mac because up to 10.6, __thread was not
supported. Until recently, we still supported for 10.6, and it's not the
case anymore, so we could make mac builds use __thread.
Unfortunately, on OSX, __thread circles back calling malloc to allocate
storage on first access, so we have an infinite loop problem here.
Fortunately, pthread_keys don't have this property, so we can use that
instead. It doesn't appear to have significantly more overhead (and TLS
overhead is small anyways compared to the amount of work involved in
allocating memory with mozjemalloc).
At the same time, we uniformize the initialization sequence between
mozjemalloc and mozjemalloc+replace-malloc, such that we have less
occasions for surprises when riding the trains (replace-malloc being
nightly only), ensuring the zone registration happens at the end of
mozjemalloc's initialization.
Adapted from
4e2e3dd9cf
and
d9f7b2a430
As per the latter commit, it would seem unlocking, in fork() child
processes, mutexes that were locked in the parent process is not really
well supported on OSX 10.12. The addition of the zone_reinit_lock
function in 10.12 supports this idea.
--HG--
extra : rebase_source : b3b58558cc195d63200078085c7e9b6c9b8d83ff
Some system libraries are using malloc_default_zone() and then using
some of the malloc_zone_* API. Under normal conditions, those functions
check the malloc_zone_t/malloc_introspection_t struct for the values
that are allowed to be NULL, so that a NULL deref doesn't happen.
As of OSX 10.12, malloc_default_zone() doesn't return the actual default
zone anymore, but returns a fake, wrapper zone. The wrapper zone defines
all the possible functions in the malloc_zone_t/malloc_introspection_t
struct (almost), and calls the function from the registered default zone
(jemalloc in our case) on its own. Without checking whether the pointers
are NULL.
This means that a system library that calls e.g.
malloc_zone_batch_malloc(malloc_default_zone(), ...) ends up trying to
call jemalloc_zone.batch_malloc, which is NULL, and crash follows.
So as of OSX 10.12, the default zone is required to have all the
functions available (really, the same as the wrapper zone), even if they
do nothing.
This is arguably a bug in libsystem_malloc in OSX 10.12, but jemalloc
still needs to work in that case.
[Adapted from
c6943acb3c]
--HG--
extra : rebase_source : 7d7a5b47fa18f56183e99c3655aee003c9be161e
The SDK jemalloc is built against might be not be the latest for various
reasons, but the resulting binary ought to work on newer versions of
OSX.
In order to ensure this, we need the fullest definitions possible, so
copy what we need from the latest version of malloc/malloc.h available
on opensource.apple.com.
[Adapted from
c68bb41793]
--HG--
extra : rebase_source : ab19c478b568ea24095a3be62c39fb81efc1920a
We have been using a different zone allocator between mozjemalloc and
replace-malloc for a long time. Jemalloc 4 uses the same as
replace-malloc, albeit as part of the jemalloc upstream code base.
We've been bitten many times in the past with Apple changes breaking the
zone allocator, and each time we've had to make changes to the three
instances, although two of them are similar and the changes there are
straightforward.
It also turns out that the way the mozjemalloc zone allocator is set up,
when a new version of OSX appears with a new version of the system zone
allocator, Firefox ends up using the system allocator, because the zone
allocator version is not supported.
So, we use the same zone allocator for both replace-malloc and
mozjemalloc, making everything on par with jemalloc 4.
--HG--
extra : rebase_source : 9c0e245b5f82bb71294370d607e690c05cc89fbc
The intent here is to reuse the zone allocator for mozjemalloc, to avoid
all the shortcomings of mozjemalloc using a different one. This change
only moves the replace-malloc zone allocator out of replace-malloc.c, to
make changes for mozjemalloc integration clearer.
--HG--
rename : memory/build/replace_malloc.c => memory/build/zone.c
extra : rebase_source : 8b98efaa4a88862f2967c855b511e92beb9c4031
Somehow, we never called those hooks when replace-malloc is enabled. I'd
expect this to cause random deadlocks when forking, and I'm surprised
this hasn't surfaced. Maybe it actually causes some intermittent oranges
on automation, who knows.
This also brings consistency with what is done for jemalloc 4, and with
the mozjemalloc implementation, too, that we're going to replace with
this one in a subsequent changeset.
--HG--
extra : rebase_source : 059567d17f928098db8367e9081b631ced351110
This removes the unnecessary setting of c-basic-offset from all
python-mode files.
This was automatically generated using
perl -pi -e 's/; *c-basic-offset: *[0-9]+//'
... on the affected files.
The bulk of these files are moz.build files but there a few others as
well.
MozReview-Commit-ID: 2pPf3DEiZqx
--HG--
extra : rebase_source : 0a7dcac80b924174a2c429b093791148ea6ac204
Jemalloc 4 purges dirty pages regularly during free() when the ratio of dirty
pages compared to active pages is higher than 1 << lg_dirty_mult. We set
lg_dirty_mult in jemalloc_config to limit RSS usage, but it also has an impact
on performance.
So instead of enforcing a high ratio to force more pages being purged, we keep
jemalloc's default ratio of 8, and force a regular purge of all dirty pages,
after cycle collection.
Keeping jemalloc's default ratio avoids cycle-collection-triggered purge to
have to go through really all dirty pages when there are a lot, in which case
the normal jemalloc purge during free() will already have kicked in. It also
takes care of everything that doesn't run the cycle collector still having
a level of purge, like plugins in the plugin-container.
At the same time, since jemalloc_purge_freed_pages does nothing with jemalloc 4,
repurpose the MEMORY_FREE_PURGED_PAGES_MS telemetry probe to track the time
spent in this cycle-collector-triggered purge.
Mike Hommey
Carsten "Tomcat" Book
Julian Seward
Alex Gaynor
Benjamin Smedberg
Emanuel Hoogeveen
Tom Tromey
Chris Peterson
Ted Mielczarek
Ms2ger
Nicholas Nethercote
Jan Beich
David Major