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* Convert arena->prof_accumbytes synchronization to atomics.Jason Evans2017-02-161-0/+14
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* Call prof_gctx_create() without owing bt2gctx_mtx.Jason Evans2017-02-021-12/+29
| | | | | | | This reduces the probability of allocating (and thereby indirectly making a system call) while owning bt2gctx_mtx. Unfortunately it is an incomplete solution, because ckh insertion/deletion can also allocate/deallocate, which requires more extensive changes to address.
* Conditionalize prof fork handling on config_prof.Jason Evans2017-02-021-4/+4
| | | | This allows the compiler to completely remove dead code.
* Replace tabs following #define with spaces.Jason Evans2017-01-211-9/+9
| | | | This resolves #564.
* Remove extraneous parens around return arguments.Jason Evans2017-01-211-105/+105
| | | | This resolves #540.
* Update brace style.Jason Evans2017-01-211-281/+287
| | | | | | | Add braces around single-line blocks, and remove line breaks before function-opening braces. This resolves #537.
* Fix prof_realloc() regression.Jason Evans2017-01-171-40/+123
| | | | | | | | | | | | | | Mostly revert the prof_realloc() changes in 498856f44a30b31fe713a18eb2fc7c6ecf3a9f63 (Move slabs out of chunks.) so that prof_free_sampled_object() is called when appropriate. Leave the prof_tctx_[re]set() optimization in place, but add an assertion to verify that all eight cases are correctly handled. Add a comment to make clear the code ordering, so that the regression originally fixed by ea8d97b8978a0c0423f0ed64332463a25b787c3d (Fix prof_{malloc,free}_sample_object() call order in prof_realloc().) is not repeated. This resolves #499.
* Remove leading blank lines from function bodies.Jason Evans2017-01-131-29/+0
| | | | This resolves #535.
* Implement per arena base allocators.Jason Evans2016-12-271-2/+4
| | | | | | | | | | | | | Add/rename related mallctls: - Add stats.arenas.<i>.base . - Rename stats.arenas.<i>.metadata to stats.arenas.<i>.internal . - Add stats.arenas.<i>.resident . Modify the arenas.extend mallctl to take an optional (extent_hooks_t *) argument so that it is possible for all base allocations to be serviced by the specified extent hooks. This resolves #463.
* Refactor prng to not use 64-bit atomics on 32-bit platforms.Jason Evans2016-11-071-1/+1
| | | | This resolves #495.
* Do not (recursively) allocate within tsd_fetch().Jason Evans2016-10-211-45/+44
| | | | | | | Refactor tsd so that tsdn_fetch() does not trigger allocation, since allocation could cause infinite recursion. This resolves #458.
* Implement cache-oblivious support for huge size classes.Jason Evans2016-06-031-1/+1
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* Refactor rtree to always use base_alloc() for node allocation.Jason Evans2016-06-031-14/+16
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* Use rtree-based chunk lookups rather than pointer bit twiddling.Jason Evans2016-06-031-13/+19
| | | | | | | | | | | Look up chunk metadata via the radix tree, rather than using CHUNK_ADDR2BASE(). Propagate pointer's containing extent. Minimize extent lookups by doing a single lookup (e.g. in free()) and propagating the pointer's extent into nearly all the functions that may need it.
* Resolve bootstrapping issues when embedded in FreeBSD libc.Jason Evans2016-05-111-235/+240
| | | | | | | | | | | | | b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (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.
* Scale leak report summary according to sampling probability.Jason Evans2016-05-041-18/+38
| | | | | | | This makes the numbers reported in the leak report summary closely match those reported by jeprof. This resolves #356.
* Fix huge_palloc() regression.Jason Evans2016-05-041-1/+1
| | | | | | | | | | Split arena_choose() into arena_[i]choose() and use arena_ichoose() for arena lookup during internal allocation. This fixes huge_palloc() so that it always succeeds during extent node allocation. This regression was introduced by 66cd953514a18477eb49732e40d5c2ab5f1b12c5 (Do not allocate metadata via non-auto arenas, nor tcaches.).
* Fix fork()-related lock rank ordering reversals.Jason Evans2016-04-261-16/+36
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* Do not allocate metadata via non-auto arenas, nor tcaches.Jason Evans2016-04-221-24/+18
| | | | | This assures that all internally allocated metadata come from the first opt_narenas arenas, i.e. the automatically multiplexed arenas.
* Add witness, a simple online locking validator.Jason Evans2016-04-141-212/+277
| | | | This resolves #358.
* Silence miscellaneous 64-to-32-bit data loss warnings.Jason Evans2016-02-261-1/+1
| | | | This resolves #341.
* Silence miscellaneous 64-to-32-bit data loss warnings.Jason Evans2016-02-241-1/+1
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* Fix Windows-specific prof-related compilation portability issues.Jason Evans2016-02-211-3/+16
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* getpid() fix for Win32rustyx2016-02-201-0/+2
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* Refactor prng* from cpp macros into inline functions.Jason Evans2016-02-201-2/+1
| | | | | Remove 32-bit variant, convert prng64() to prng_lg_range(), and add prng_range().
* Fast-path improvement: reduce # of branches and unnecessary operations.Qi Wang2015-11-101-17/+20
| | | | | | - Combine multiple runtime branches into a single malloc_slow check. - Avoid calling arena_choose / size2index / index2size on fast path. - A few micro optimizations.
* Fix prof_tctx_dump_iter() to filter.Jason Evans2015-09-221-5/+17
| | | | | | | Fix prof_tctx_dump_iter() to filter out nodes that were created after heap profile dumping started. Prior to this fix, spurious entries with arbitrary object/byte counts could appear in heap profiles, which resulted in jeprof inaccuracies or failures.
* Fix prof_alloc_rollback().Jason Evans2015-09-171-1/+1
| | | | | Fix prof_alloc_rollback() to read tdata from thread-specific data rather than dereferencing a potentially invalid tctx.
* Reduce variable scope.Dmitry-Me2015-09-151-2/+2
| | | | This resolves #274.
* Fix "prof.reset" mallctl-related corruption.Jason Evans2015-09-101-3/+11
| | | | | | | Fix heap profiling to distinguish among otherwise identical sample sites with interposed resets (triggered via the "prof.reset" mallctl). This bug could cause data structure corruption that would most likely result in a segfault.
* Optimize arena_prof_tctx_set().Jason Evans2015-09-021-1/+1
| | | | | Optimize arena_prof_tctx_set() to avoid reading run metadata when deciding whether it's actually necessary to write.
* Fix MinGW-related portability issues.Jason Evans2015-07-231-10/+10
| | | | | | | | | | | | | Create and use FMT* macros that are equivalent to the PRI* macros that inttypes.h defines. This allows uniform use of the Unix-specific format specifiers, e.g. "%zu", as well as avoiding Windows-specific definitions of e.g. PRIu64. Add ffs()/ffsl() support for compiling with gcc. Extract compatibility definitions of ENOENT, EINVAL, EAGAIN, EPERM, ENOMEM, and ENORANGE into include/msvc_compat/windows_extra.h and use the file for tests as well as for core jemalloc code.
* Add JEMALLOC_FORMAT_PRINTF().Jason Evans2015-07-221-2/+2
| | | | | | Replace JEMALLOC_ATTR(format(printf, ...). with JEMALLOC_FORMAT_PRINTF(), so that configuration feature tests can omit the attribute if it would cause extraneous compilation warnings.
* Fix MinGW build warnings.Jason Evans2015-07-081-1/+1
| | | | | | | | | | Conditionally define ENOENT, EINVAL, etc. (was unconditional). Add/use PRIzu, PRIzd, and PRIzx for use in malloc_printf() calls. gcc issued (harmless) warnings since e.g. "%zu" should be "%Iu" on Windows, and the alternative to this workaround would have been to disable the function attributes which cause gcc to look for type mismatches in formatted printing function calls.
* Rename pprof to jeprof.Jason Evans2015-05-011-1/+1
| | | | | | | | | | This rename avoids installation collisions with the upstream gperftools. Additionally, jemalloc's per thread heap profile functionality introduced an incompatible file format, so it's now worthwhile to clearly distinguish jemalloc's version of this script from the upstream version. This resolves #229.
* Prefer /proc/<pid>/task/<pid>/maps over /proc/<pid>/maps on Linux.Jason Evans2015-05-011-5/+24
| | | | This resolves #227.
* Fix heap profiling regressions.Jason Evans2015-03-161-12/+9
| | | | | | | | | | | | | | | Remove the prof_tctx_state_destroying transitory state and instead add the tctx_uid field, so that the tuple <thr_uid, tctx_uid> uniquely identifies a tctx. This assures that tctx's are well ordered even when more than two with the same thr_uid coexist. A previous attempted fix based on prof_tctx_state_destroying was only sufficient for protecting against two coexisting tctx's, but it also introduced a new dumping race. These regressions were introduced by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.) and 764b00023f2bc97f240c3a758ed23ce9c0ad8526 (Fix a heap profiling regression.).
* Eliminate innocuous compiler warnings.Jason Evans2015-03-141-0/+2
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* Fix a heap profiling regression.Jason Evans2015-03-141-13/+31
| | | | | | | | | | Add the prof_tctx_state_destroying transitionary state to fix a race between a thread destroying a tctx and another thread creating a new equivalent tctx. This regression was introduced by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.).
* Fix a heap profiling regression.Jason Evans2015-03-121-2/+7
| | | | | | | | | | Fix prof_tctx_comp() to incorporate tctx state into the comparison. During a dump it is possible for both a purgatory tctx and an otherwise equivalent nominal tctx to reside in the tree at the same time. This regression was introduced by 602c8e0971160e4b85b08b16cf8a2375aa24bc04 (Implement per thread heap profiling.).
* Implement explicit tcache support.Jason Evans2015-02-101-13/+22
| | | | | | | | | Add the MALLOCX_TCACHE() and MALLOCX_TCACHE_NONE macros, which can be used in conjunction with the *allocx() API. Add the tcache.create, tcache.flush, and tcache.destroy mallctls. This resolves #145.
* Implement the prof.gdump mallctl.Jason Evans2015-01-261-0/+34
| | | | | | | | This feature makes it possible to toggle the gdump feature on/off during program execution, whereas the the opt.prof_dump mallctl value can only be set during program startup. This resolves #72.
* Implement metadata statistics.Jason Evans2015-01-241-14/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | There are three categories of metadata: - Base allocations are used for bootstrap-sensitive internal allocator data structures. - Arena chunk headers comprise pages which track the states of the non-metadata pages. - Internal allocations differ from application-originated allocations in that they are for internal use, and that they are omitted from heap profiles. The metadata statistics comprise the metadata categories as follows: - stats.metadata: All metadata -- base + arena chunk headers + internal allocations. - stats.arenas.<i>.metadata.mapped: Arena chunk headers. - stats.arenas.<i>.metadata.allocated: Internal allocations. This is reported separately from the other metadata statistics because it overlaps with the allocated and active statistics, whereas the other metadata statistics do not. Base allocations are not reported separately, though their magnitude can be computed by subtracting the arena-specific metadata. This resolves #163.
* Don't dereference NULL tdata in prof_{enter,leave}().Jason Evans2014-11-011-13/+18
| | | | | | It is possible for the thread's tdata to be NULL late during thread destruction, so take care not to dereference a NULL pointer in such cases.
* Miscellaneous cleanups.Jason Evans2014-10-311-1/+3
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* Fix prof_{enter,leave}() calls to pass tdata_self.Jason Evans2014-10-301-19/+24
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* Use JEMALLOC_INLINE_C everywhere it's appropriate.Jason Evans2014-10-301-2/+2
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* Fix a prof_tctx_t/prof_tdata_t cleanup race.Jason Evans2014-10-121-5/+5
| | | | | | Fix a prof_tctx_t/prof_tdata_t cleanup race by storing a copy of thr_uid in prof_tctx_t, so that the associated tdata need not be present during tctx teardown.
* Avoid atexit(3) when possible, disable prof_final by default.Jason Evans2014-10-091-8/+9
| | | | | | | | | | | | atexit(3) can deadlock internally during its own initialization if jemalloc calls atexit() during jemalloc initialization. Mitigate the impact by restructuring prof initialization to avoid calling atexit() unless the registered function will actually dump a final heap profile. Additionally, disable prof_final by default so that this land mine is opt-in rather than opt-out. This resolves #144.
* Fix a prof_tctx_t destruction race.Jason Evans2014-10-061-18/+32
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