Commit Graph

270 Commits

Author SHA1 Message Date
Kevin Svetlitski
3aae792b10 Fix infinite purging loop in HPA
As reported in #2449, under certain circumstances it's possible to get
stuck in an infinite loop attempting to purge from the HPA. We now
handle this by validating the HPA settings at the end of
configuration parsing and either normalizing them or aborting depending on
if `abort_conf` is set.
2023-08-08 14:36:19 -07:00
Kevin Svetlitski
ebd7e99f5c Add a test-case for small profiled allocations
Validate that small allocations (i.e. those with `size <= SC_SMALL_MAXCLASS`)
which are sampled for profiling maintain the expected invariants even
though they now take up less space.
2023-07-03 16:19:06 -07:00
barracuda156
4422f88d17 Makefile.in: link with g++ when cxx enabled 2023-02-21 13:26:58 -08:00
guangli-dai
06374d2a6a Benchmark operator delete
Added the microbenchmark for operator delete.
Also modified bench.h so that it can be used in C++.
2022-11-21 11:14:05 -08:00
divanorama
3de0c24859 Disable builtin malloc in tests
With `--with-jemalloc-prefix=` and without `-fno-builtin` or `-O1` both clang and gcc may optimize out `malloc` calls
whose result is unused. Comparing result to NULL also doesn't necessarily count as being used.

This won't be a problem in most client programs as this only concerns really unused pointers, but in
tests it's important to actually execute allocations.
`-fno-builtin` should disable this optimization for both gcc and clang, and applying it only to tests code shouldn't hopefully be an issue.
Another alternative is to force "use" of result but that'd require more changes and may miss some other optimization-related issues.

This should resolve https://github.com/jemalloc/jemalloc/issues/2091
2022-10-03 10:39:13 -07:00
Alex Lapenkou
df7ad8a9b6 Revert "Echo installed files via verbose 'install' command"
This reverts commit f15d8f3b41. "install -v"
turned out to be not portable and not work on NetBSD.
2022-06-07 12:28:45 -07:00
Qi Wang
0e29ad4efa Rename zero_realloc option "strict" to "alloc".
With realloc(ptr, 0) being UB per C23, the option name "strict" makes less sense
now.  Rename to "alloc" which describes the behavior.
2022-04-20 10:27:25 -07:00
Charles
eaaa368bab Add comments and use meaningful vars in sz_psz2ind. 2022-03-24 16:56:59 -07:00
Shuduo Sang
640c3c72e6 Add support for 'make uninstall' 2022-01-19 12:28:16 -08:00
Alex Lapenkou
f15d8f3b41 Echo installed files via verbose 'install' command
It's not necessary to manually echo all install commands, similar effect
is achieved via 'install -v'
2022-01-19 12:28:16 -08:00
Qi Wang
011449f17b Fix doc build with install-suffix. 2022-01-11 21:15:24 -08:00
Qi Wang
b75822bc6e Implement use-after-free detection using junk and stash.
On deallocation, sampled pointers (specially aligned) get junked and stashed
into tcache (to prevent immediate reuse).  The expected behavior is to have
read-after-free corrupted and stopped by the junk-filling, while
write-after-free is checked when flushing the stashed pointers.
2021-12-29 14:44:43 -08:00
Alex Lapenkou
0f6da1257d San: Implement bump alloc
The new allocator will be used to allocate guarded extents used as slabs
for guarded small allocations.
2021-12-15 10:39:17 -08:00
Alex Lapenkou
62f9c54d2a San: Rename 'guard' to 'san'
This prepares the foundation for more sanitizer-related work in the
future.
2021-12-15 10:39:17 -08:00
Qi Wang
deb8e62a83 Implement guard pages.
Adding guarded extents, which are regular extents surrounded by guard pages
(mprotected).  To reduce syscalls, small guarded extents are cached as a
separate eset in ecache, and decay through the dirty / muzzy / retained pipeline
as usual.
2021-09-26 16:30:15 -07:00
Alex Lapenkou
f7d46b8119 Allow setting custom backtrace hook
Existing backtrace implementations skip native stack frames from runtimes like
Python. The hook allows to augment the backtraces to attribute allocations to
native functions in heap profiles.
2021-09-22 15:04:01 -07:00
Mingli Yu
e5062e9fb9 Makefile.in: make sure doc generated before install
There is a race between the doc generation and the doc installation,
so make the install depend on the build for doc.

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
2021-09-13 13:40:39 -07:00
David Goldblatt
e09eac1d4e Remove hpa_central.
This is now dead code.
2021-07-23 21:59:59 -07:00
David Goldblatt
113938b6f4 HPA: Pull out a hooks type.
For now, this is a no-op change.  In a subsequent commit, it will be useful for
testing.
2021-07-12 17:59:18 -07:00
David Goldblatt
1d4a7666d5 HPA: Do deferred operations on background threads. 2021-07-12 17:59:18 -07:00
David Goldblatt
de033f56c0 mpsc_queue: Add module.
This is a simple multi-producer, single-consumer queue.  The intended use case
is in the HPA, as we begin supporting hpdatas that move between hpa_shards.  We
take just a single CAS as the cost to send a message (or a batch of messages) in
the low-contention case, and lock-freedom lets us avoid some lock-ordering
issues.
2021-06-24 14:55:49 -07:00
David Goldblatt
4452a4812f Add opt.experimental_infallible_new.
This allows a guarantee that operator new never throws.

Fix the .gitignore rules to include test/integration/cpp while we're here.
2021-06-24 12:22:51 -07:00
David Goldblatt
aea91b8c33 Clean up some minor data structure inconsistencies
Namely, unify the include guard styling with the majority of the project, and do
flat_bitmap -> fb, to match its naming convention.
2021-05-12 11:14:23 -07:00
Qi Wang
7dc77527ba Delete the mutex_pool module. 2021-03-29 17:19:53 -07:00
David Goldblatt
f47b4c2cd8 PAI/SEC: Add a dalloc_batch function.
This lets the SEC flush all of its items in a single call, rather than flushing
everything at once.
2021-02-19 15:10:54 -08:00
David Goldblatt
8edfc5b170 Add ticker_geom_t.
This lets a single ticker object drive events across a large number of different
tick streams while sharing state.
2021-02-04 14:10:43 -08:00
Yinan Zhang
40fa4d29d3 Track per size class internal fragmentation 2021-01-07 20:39:49 -08:00
David Goldblatt
d9f7e6c668 hpdata: Add a test.
We're about to make the functionality here more complicated; testing hpdata
directly (rather than relying on user's tests) will make debugging easier.
2020-12-07 06:21:08 -08:00
David Goldblatt
ca30b5db2b Introduce hpdata_t.
Using an edata_t both for hugepages and the allocations within those hugepages
was convenient at first, but has outlived its usefulness.  Representing
hugepages explicitly, with their own data structure, will make future
development easier.
2020-12-07 06:21:08 -08:00
David Goldblatt
ecd39418ac Add fxp: A fixed-point math library.
This will be used in the next commit to allow non-integer values for
narenas_ratio.
2020-12-04 23:48:19 -08:00
David Goldblatt
cf2549a149 Add a per-arena oversize_threshold.
This can let manual arenas trade off memory and CPU the way auto arenas do.
2020-11-13 13:45:35 -08:00
David Goldblatt
4ca3d91e96 Rename geom_grow -> exp_grow.
This was promised in the review of the introduction of geom_grow, but would have
been painful to do there because of the series that introduced it.  Now that
those are comitted, renaming is easier.
2020-11-13 13:42:33 -08:00
Qi Wang
bf72188f80 Allow opt.tcache_max to accept small size classes.
Previously all the small size classes were cached.  However this has downsides
-- particularly when page size is greater than 4K (e.g. iOS), which will result
in much higher SMALL_MAXCLASS.

This change allows tcache_max to be set to lower values, to better control
resources taken by tcache.
2020-10-24 20:43:44 -07:00
David Goldblatt
ea51e97bb8 Add SEC module: a small extent cache.
This can be used to take pressure off a more centralized, worse-sharded
allocator without requiring a full break of the arena abstraction.
2020-10-23 11:14:34 -07:00
David Goldblatt
1c7da33317 HPA: Tie components into a PAI implementation. 2020-10-23 11:14:34 -07:00
Qi Wang
3de19ba401 Eagerly detect double free and sized dealloc bugs for large sizes. 2020-10-15 10:03:16 -07:00
David Goldblatt
21b70cb540 Add hpa_central module
This will be the centralized component of the coming hugepage allocator; the
source of larger chunks of memory from which smaller ones can be obtained.
2020-10-05 19:55:57 -07:00
David Goldblatt
018b162d67 Add psset: a set of pageslabs.
This introduces a new sort of edata_t; a pageslab, and a set to manage them.
This is part of a series of a commits to implement a hugepage allocator; the
pageset will be per-arena, and track small page allocations requests within a
larger extent allocated from a centralized hugepage allocator.
2020-09-18 12:39:25 -07:00
David Goldblatt
131b1b5338 Rename ecache_grow -> geom_grow.
We're about to start using it outside of the ecaches, in the HPA central
allocator.
2020-08-19 16:53:21 -07:00
David Goldblatt
32d4673221 Add a mallctl speed stress test. 2020-08-13 10:03:15 -07:00
David Goldblatt
38867c5c17 Makefile: alphabetize stress/analyze utilities. 2020-08-13 10:03:15 -07:00
David Goldblatt
eaed1e39be Add sized-delete size-checking functionality.
The existing checks are good at finding such issues (on tcache flush), but not
so good at pinpointing them.  Debug mode can find them, but sometimes debug mode
slows down a program so much that hard-to-hit bugs can take a long time to
crash.

This commit adds functionality to keep programs mostly on their fast paths,
while also checking every sized delete argument they get.
2020-08-05 19:34:05 -07:00
David Goldblatt
81c2f841e5 Add a simple utility to detect profiling bias. 2020-08-05 18:33:55 -07:00
Yinan Zhang
e032a1a1de Add a stress test for batch allocation 2020-08-03 09:36:40 -07:00
Yinan Zhang
978f830ee3 Add batch allocation API 2020-07-31 09:16:50 -07:00
David Goldblatt
ceee823519 Add flat_bitmap.
The flat_bitmap module offers an extended API, at the cost of decreased
performance in the case of very large bitmaps.
2020-07-30 15:25:23 -07:00
David Goldblatt
7efcb946c4 PAC: Add an init function. 2020-07-09 13:41:04 -07:00
Yinan Zhang
03ae509f32 Create prof_sys module for reading system thread name 2020-06-29 14:27:50 -07:00
Yinan Zhang
5d292b5660 Push error handling logic out of core dumping logic 2020-06-29 14:27:50 -07:00
Yinan Zhang
d8cea87562 Move size inspections to test/analyze 2020-06-26 09:45:28 -07:00