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* Modify configure to determine return value of strerror_r.Christopher Ferris2018-01-111-0/+19
| | | | | | | | On glibc and Android's bionic, strerror_r returns char* when _GNU_SOURCE is defined. Add a configure check for this rather than assume glibc is the only libc that behaves this way.
* Make sure JE_CXXFLAGS_ADD uses CPP compilerNehal J Wani2018-01-041-0/+2
| | | | | | | | | All the invocations of AC_COMPILE_IFELSE inside JE_CXXFLAGS_ADD were running 'the compiler and compilation flags of the current language' which was always the C compiler and the CXXFLAGS were never being tested against a C++ compiler. This patch fixes this issue by temporarily changing the chosen compiler to C++ by pushing it over the stack and popping it immediately after the compilation check.
* Disable JEMALLOC_HAVE_MADVISE_HUGE for arm* CPUs.marxin2018-01-041-0/+6
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* Add configure-time detection for madvise(..., MADV_DO[NT]DUMP)David Goldblatt2017-10-161-0/+11
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* Remove the default value for JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS.Qi Wang2017-10-111-2/+2
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* Define MADV_FREE on our own when needed.Qi Wang2017-10-111-0/+9
| | | | | | On x86 Linux, we define our own MADV_FREE if madvise(2) is available, but no MADV_FREE is detected. This allows the feature to be built in and enabled with runtime detection.
* Power: disable the CPU_SPINWAIT macro.David Goldblatt2017-10-051-4/+3
| | | | | | | | | | | | | | Quoting from https://github.com/jemalloc/jemalloc/issues/761 : [...] reading the Power ISA documentation[1], the assembly in [the CPU_SPINWAIT macro] isn't correct anyway (as @marxin points out): the setting of the program-priority register is "sticky", and we never undo the lowering. We could do something similar, but given that we don't have testing here in the first place, I'm inclined to simply not try. I'll put something up reverting the problematic commit tomorrow. [1] Book II, chapter 3 of the 2.07B or 3.0B ISA documents.
* dumpbin doesn't exist in mingwTamir Duberstein2017-09-211-1/+7
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* Allow toolchain to determine nmTamir Duberstein2017-09-211-1/+6
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* whitespaceTamir Duberstein2017-09-211-7/+7
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* Fix support for GNU/kFreeBSDFaidon Liambotis2017-08-111-1/+10
| | | | | | | | | | | The configure.ac seciton right now is the same for Linux and kFreeBSD, which results into an incorrect configuration of e.g. defining JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY instead of FreeBSD's JEMALLOC_SYSCTL_VM_OVERCOMMIT. GNU/kFreeBSD is really a glibc + FreeBSD kernel system, so it needs its own entry which has a mixture of configuration options from Linux and FreeBSD.
* Implement opt.metadata_thpQi Wang2017-08-111-0/+3
| | | | | This option enables transparent huge page for base allocators (require MADV_HUGEPAGE support).
* Logging: allow logging with empty varargs.David Goldblatt2017-07-221-0/+1
| | | | | | Currently, the log macro requires at least one argument after the format string, because of the way the preprocessor handles varargs macros. We can hide some of that irritation by pushing the extra arguments into a varargs function.
* Add a logging facility.David T. Goldblatt2017-07-211-0/+16
| | | | | This sets up a hierarchical logging facility, so that we can add logging statements liberally, and turn them on in a fine-grained manner.
* Enforce minimum autoconf version (currently 2.68).Jason Evans2017-06-291-0/+1
| | | | This resolves #912.
* Make sure LG_PAGE <= LG_HUGEPAGE.Jason Evans2017-06-291-0/+4
| | | | This resolves #883.
* Add thread name for background threads.Qi Wang2017-06-231-0/+9
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* Normalize background thread configuration.Jason Evans2017-06-091-0/+10
| | | | Also fix a compilation error #ifndef JEMALLOC_PTHREAD_CREATE_WRAPPER.
* Add jemalloc prefix to allocator functions pruned by jeprof.Jason Evans2017-05-311-0/+1
| | | | This resolves #507.
* Add the --disable-thp option to support cross compiling.Jason Evans2017-05-301-3/+22
| | | | This resolves #669.
* Implementing opt.background_thread.Qi Wang2017-05-231-8/+24
| | | | | | | | | | | Added opt.background_thread to enable background threads, which handles purging currently. When enabled, decay ticks will not trigger purging (which will be left to the background threads). We limit the max number of threads to NCPUs. When percpu arena is enabled, set CPU affinity for the background threads as well. The sleep interval of background threads is dynamic and determined by computing number of pages to purge in the future (based on backlog).
* Automatically generate private symbol name mangling macros.Jason Evans2017-05-121-21/+89
| | | | | | | | Rather than using a manually maintained list of internal symbols to drive name mangling, add a compilation phase to automatically extract the list of internal symbols. This resolves #677.
* Remove unused private_unnamespace infrastructure.Jason Evans2017-05-121-9/+0
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* Add --with-version=VERSION .Jason Evans2017-05-031-3/+7
| | | | | | | This simplifies configuration when embedding a jemalloc release into another project's git repository. This resolves #811.
* Add extent_destroy_t and use it during arena destruction.Jason Evans2017-04-291-1/+1
| | | | | | | | | | Add the extent_destroy_t extent destruction hook to extent_hooks_t, and use it during arena destruction. This hook explicitly communicates to the callee that the extent must be destroyed or tracked for later reuse, lest it be permanently leaked. Prior to this change, retained extents could unintentionally be leaked if extent retention was enabled. This resolves #560.
* Refactor !opt.munmap to opt.retain.Jason Evans2017-04-291-6/+6
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* Replace --disable-munmap with opt.munmap.Jason Evans2017-04-251-14/+2
| | | | | | | | | Control use of munmap(2) via a run-time option rather than a compile-time option (with the same per platform default). The old behavior of --disable-munmap can be achieved with --with-malloc-conf=munmap:false. This partially resolves #580.
* Remove --enable-code-coverage.Jason Evans2017-04-241-26/+0
| | | | | | | This option hasn't been particularly useful since the original pre-3.0.0 push to broaden test coverage. This partially resolves #580.
* Remove --disable-cc-silence.Jason Evans2017-04-241-23/+4
| | | | | | | The explicit compiler warning suppression controlled by this option is universally desirable, so remove the ability to disable suppression. This partially resolves #580.
* Remove --with-lg-tiny-min.Jason Evans2017-04-241-9/+1
| | | | | | This option isn't useful in practice. This partially resolves #580.
* Remove --with-lg-size-class-group.Jason Evans2017-04-241-8/+1
| | | | | | | | Four size classes per size doubling has proven to be a universally good choice for the entire 4.x release series, so there's little point to preserving this configurability. This partially resolves #580.
* Add missing 'test' to LG_SIZEOF_PTR tests.Jason Evans2017-04-241-3/+3
| | | | | | This fixes a bug/regression introduced by a01f99307719dcc8ca27cc70f0f0011beff914fa (Only disable munmap(2) by default on 64-bit Linux.).
* Enable -Wundef, when supported.David Goldblatt2017-04-221-1/+4
| | | | | | This can catch bugs in which one header defines a numeric constant, and another uses it without including the defining header. Undefined preprocessor symbols expand to '0', so that this will compile fine, silently doing the math wrong.
* Remove --enable-ivsalloc.Jason Evans2017-04-211-18/+1
| | | | | | | | | | | | Continue to use ivsalloc() when --enable-debug is specified (and add assertions to guard against 0 size), but stop providing a documented explicit semantics-changing band-aid to dodge undefined behavior in sallocx() and malloc_usable_size(). ivsalloc() remains compiled in, unlike when #211 restored --enable-ivsalloc, and if JEMALLOC_FORCE_IVSALLOC is defined during compilation, sallocx() and malloc_usable_size() will still use ivsalloc(). This partially resolves #580.
* Remove --disable-tls.Jason Evans2017-04-211-23/+4
| | | | | | | This option is no longer useful, because TLS is correctly configured automatically on all supported platforms. This partially resolves #580.
* Remove --disable-tcache.Jason Evans2017-04-211-17/+0
| | | | | | | | | | | Simplify configuration by removing the --disable-tcache option, but replace the testing for that configuration with --with-malloc-conf=tcache:false. Fix the thread.arena and thread.tcache.flush mallctls to work correctly if tcache is disabled. This partially resolves #580.
* Only disable munmap(2) by default on 64-bit Linux.Jason Evans2017-04-171-2/+6
| | | | | | | This reduces the likelihood of address space exhaustion on 32-bit systems. This resolves #350.
* Fix LD_PRELOAD_VAR configuration logic for 64-bit AIX.Jason Evans2017-04-171-1/+1
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* Header refactoring: Split up jemalloc_internal.hDavid Goldblatt2017-04-111-3/+3
| | | | | | | | | | | | | | This is a biggy. jemalloc_internal.h has been doing multiple jobs for a while now: - The source of system-wide definitions. - The catch-all include file. - The module header file for jemalloc.c This commit splits up this functionality. The system-wide definitions responsibility has moved to jemalloc_preamble.h. The catch-all include file is now jemalloc_internal_includes.h. The module headers for jemalloc.c are now in jemalloc_internal_[externs|inlines|types].h, just as they are for the other modules.
* Port CPU_SPINWAIT to __powerpc64__Rafael Folco2017-04-101-1/+2
| | | | | | | | | Hyper-threaded CPUs may need a special instruction inside spin loops in order to yield to another virtual CPU. The 'pause' instruction that is available for x86 is not supported on Power. Apparently the extended mnemonics like yield, mdoio, and mdoom are not actually implemented on POWER8, although mentioned in the ISA 2.07 document. The recommended magic bits are an 'or 31,31,31'.
* Clamp LG_VADDR for 32-bit builds on x64.Jason Evans2017-03-231-0/+3
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* Fix pages_purge_forced() to discard pages on non-Linux systems.Jason Evans2017-03-141-0/+2
| | | | | madvise(..., MADV_DONTNEED) only causes demand-zeroing on Linux, so fall back to overlaying a new mapping.
* Implement per-CPU arena.Qi Wang2017-03-091-0/+9
| | | | | | | | | | | | | | | | | | The new feature, opt.percpu_arena, determines thread-arena association dynamically based CPU id. Three modes are supported: "percpu", "phycpu" and disabled. "percpu" uses the current core id (with help from sched_getcpu()) directly as the arena index, while "phycpu" will assign threads on the same physical CPU to the same arena. In other words, "percpu" means # of arenas == # of CPUs, while "phycpu" has # of arenas == 1/2 * (# of CPUs). Note that no runtime check on whether hyper threading is enabled is added yet. When enabled, threads will be migrated between arenas when a CPU change is detected. In the current design, to reduce overhead from reading CPU id, each arena tracks the thread accessed most recently. When a new thread comes in, we will read CPU id and update arena if necessary.
* Introduce a backport of C11 atomicsDavid Goldblatt2017-03-031-22/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This introduces a backport of C11 atomics. It has four implementations; ranked in order of preference, they are: - GCC/Clang __atomic builtins - GCC/Clang __sync builtins - MSVC _Interlocked builtins - C11 atomics, from <stdatomic.h> The primary advantages are: - Close adherence to the standard API gives us a defined memory model. - Type safety: atomic objects are now separate types from non-atomic ones, so that it's impossible to mix up atomic and non-atomic updates (which is undefined behavior that compilers are starting to take advantage of). - Efficiency: we can specify ordering for operations, avoiding fences and atomic operations on strongly ordered architectures (example: `atomic_write_u32(ptr, val);` involves a CAS loop, whereas `atomic_store(ptr, val, ATOMIC_RELEASE);` is a plain store. This diff leaves in the current atomics API (implementing them in terms of the backport). This lets us transition uses over piecemeal. Testing: This is by nature hard to test. I've manually tested the first three options on Linux on gcc by futzing with the #defines manually, on freebsd with gcc and clang, on MSVC, and on OS X with clang. All of these were x86 machines though, and we don't have any test infrastructure set up for non-x86 platforms.
* fix typo sytem -> systemcharsyam2017-03-011-1/+1
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* Put -D_REENTRANT in CPPFLAGS rather than CFLAGS.Jason Evans2017-02-281-1/+1
| | | | | | This regression was introduced by 194d6f9de8ff92841b67f38a2a6a06818e3240dd (Restructure *CFLAGS/*CXXFLAGS configuration.).
* Avoid -lgcc for heap profiling if unwind.h is missing.Jason Evans2017-02-211-1/+3
| | | | | | This removes an unneeded library dependency when falling back to intrinsics-based backtracing (or failing to enable heap profiling at all).
* Determine rtree levels at compile time.Jason Evans2017-02-091-0/+68
| | | | | | | Rather than dynamically building a table to aid per level computations, define a constant table at compile time. Omit both high and low insignificant bits. Use one to three tree levels, depending on the number of significant bits.
* Remove extraneous parens around return arguments.Jason Evans2017-01-211-2/+2
| | | | This resolves #540.
* Remove -Werror=declaration-after-statement.Jason Evans2017-01-191-1/+0
| | | | This partially resolves #536.
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