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2012-03-22Ifdef all dynamic trace codePatrik Nyblom
2012-03-22Move dtrace erlang code and NIF into runtime_toolsPatrik Nyblom
Also make dyntrace NIF's load in on_load instead of init/0
2012-03-22Change to more specific configure options for dtracePatrik Nyblom
2012-03-22Add DTrace support for OS X, Solaris, and Linux (via SystemTap), 1/4Scott Lystig Fritchie
Since it's been quite a while since I've written C code, *and* I haven't done any significant hacking on the VM itself in years, it's quite likely that I haven't done things in 100% proper style. Or my co-collaborators Dustin Sallings (CouchBase) or Michal Ptaszek (Erlang Solutions). My intent for this patch is to start discussion and review of DTrace support for consideration for the R15 release. For additional background on the motivation for this work, please see the slides for the presentation at the Erlang User Conference 2011 in Stockholm: https://www.erlang-factory.com/upload/presentations/462/euc2011-draft2.pdf Changes relative to dtrace-review2 branch: * Fix errors in OTP test suite 'kernel' file_SUITE * Fix errors in OTP test suite 'kernel' prim_file_SUITE * Fix bad pointer bug in efile_drv.c flush_write() * Move the DTrace material from the top of `README.md` into a new file, `README.dtrace.md` Changes since last push to GitHub (relative to commit 5828a4fb28, which was the former `dtrace-review1` branch): * Rebased onto 14 Nov 2011's "master" branch * Recent changes to the async task queuing mechanism means that the async worker queue length is not available. A bogus value of -1 is hard-coded until there's a good way to peek into the new queue structure and find the queue length. * Small fixes based on review comments by Mikael Pettersson, Andrew Thompson, and Andreas Schultz. Add autoconf support: use "./configure --enable-dtrace" on all supported platforms: * OS X Snow Leopard or later * Solaris 10 or OpenSolaris * Linux, via SystemTap's DTrace compatibility packages * FreeBSD 9.0RC1. FreeBSD 8 and earlier do not have support for USDT, DTrace's User-land Statically Defined Tracing. See the file `erts/emulator/beam/erlang_dtrace.d` for the definition of all DTrace probes in the virtual machine so far. Example D scripts can be found in `lib/dtrace/examples`. Note that if you see the error message `{name of probe} does not match any probes`, then there is no Erlang VM process + DTrace probes running. To fix, start a DTrace-enabled VM or remove `-q` from the `dtrace` command line. The `lib/dtrace` directory contains a small code-only OTP application that contains code that allows Erlang code to trigger a DTrace probe. Dynamic creation & deletion of DTrace probes is not currently supported, so the `dtrace:p()` function is hacked to allow a variable number of arguments (up to four integers and up to four strings) to be used. See the comments at the top of `lib/dtrace/src/dtrace.c` for more detail. One feature that may be controversial is the notion I've introduced of a special process dictionary key that can be used by Erlang code to tag I/O operations for an application-specific purpose. Right now, that tag's name is `dtrace_utag`. The dictionary keys used by `sys` and other modules start with a dollar sign. Perhaps there is some convention (but not a dollar sign?) that this tag should use? The purpose of the process dictionary key is to allow the tag to be included in trace messages, e.g. for file I/O, without changing the API of the `file.erl` module's functions. For example, here's a use of the tag when calling the `file:rename/2` function: (bar@sbb2)1> put(dtrace_utag, "GGOOOAAALL!!!!!"). undefined (bar@sbb2)2> dtrace:init(). ok %% Now start both the `user-probe.d` and `efile_drv.d` D scripts %% found in the `lib/dtrace/examples` directory. (bar@sbb2)3> dtrace:p(7, 8, 9, "one", "four"). true %% The output from the `user-probe.d` script: <0.40.0> GGOOOAAALL!!!!! 7 8 9 0 'one' 'four' '' '' (bar@sbb2)4> file:rename("old-name", "new-name"). {error,enoent} %% The output from the `efile_drv.d` script: async I/O pool port #Port<0.59> queue len 1 async I/O pool port #Port<0.59> queue len 0 efile_drv enter tag={1,110} user tag GGOOOAAALL!!!!! | RENAME (12) | args: old-name new-name , 0 0 (port #Port<0.59>) async I/O worker tag={1,110} | RENAME (12) | efile_drv-int_entry async I/O worker tag={1,110} | RENAME (12) | efile_drv-int_return efile_drv return tag={1,110} user tag GGOOOAAALL!!!!! | RENAME (12) | errno 2 I'm not exactly happy with this choice of tagging, namely using `put(dtrace_utag, Tag::list())`. But this is an experiment, so we'll see how it goes. I can't imagine changing the API for all file.erl functions in order pass the tag explicitly. Some modules have some extensive (ab)use of the C preprocessor to reduce the amount of #ifdefs that clutter the code. In several places, I have not #ifdef'ed automatic variables because of clutter. For the same reason, there are a handful of cases where I added DTrace-related members to a struct definition without an #ifdef. I feel that the result is easier to read than earlier drafts where I did use many more `https://github.com/slfritchie/otp/tree/dtrace-experiment+michal2` if you're curious.) I expect there may be some debate about whether the bloat of the affected structs is worthwhile. I erred on adding stuff to structs, especially in the efile_drv.c driver, not having a full grasp on what was thread-safe and what was not ... so I erred on the side of caution. The efile_drv.c has a work-around for a crazy GCC optimization bug. Thank goodness for Google, I dunno how I would've found a work-around for this silly thing. Many thanks to Trond Norbye for writing clearly about the problem in a membase Git repo commit message. /* * A note on probe naming: if "__" appears in a provider probe * definition, then two things happen during compilation: * * 1. The "__" will turn into a hypen, "-", for the probe name. * 2. The "__" will turn into a single underscore, "_", for the * macro names and function definitions that the compiler and * C developers will see. * * We'll try to use the following naming convention. We're a bit * limited because, as a USDT probe, we can only specify the 4th part * of the probe name, e.g. erlang*:::mumble. The 2nd part of the * probe name is always going to be "beam" or "beam.smp", and the 3rd * part of the probe name will always be the name of the function * that's calling the probe. * * So, all probes will be have names defined in this file using the * convention category__name or category__sub_category__name. This * will translate to probe names of category-name or * category-sub_category-name. * * Each of "category", "sub_category", and "name" may have underscores * but may not have hyphens. */ Add tentative support for sequential tracing sending, queueing, and receiving a message. I don't believe I've fully covered all the major places where it would be useful to have the sequential trace token info in a probe -- guidance from the OTP team would be helpful, if there's time to do that kind of review. Add global variable `erts_this_node_sysname`.
2012-01-13erts: Fix parallel make for emulator zlibRaimo Niskanen
Convert the recursive make for zlib into a make include file.
2011-12-08Merge branch 'ta/sendfile/OTP-9240'Lukas Larsson
* ta/sendfile/OTP-9240: Do not use async threads on DARWIN Fix cleanup when sendfile process crashes Return {error,closed} from sendfile if closed Do not use SFV_NOWAIT as it does not exist on all solaris Clarify some code comments Make solaris use sendfilev
2011-12-05Make solaris use sendfilevLukas Larsson
sendfilev is a richer API which allows us to do non blocking TCP on solaris. The normal sendfile API seems to have some issue with non blocking sockets and the return value of sendfile.
2011-12-02Fix time typesRickard Green
2011-12-02Back to not using 32bit time_tPatrik Nyblom
2011-12-02Make Win64 build work both under MSYS and CygwinPatrik Nyblom
2011-12-02Build Win64 Erlang emulator using MSYSunknown
Still does not run, just compiles.
2011-12-02Merge branch 'ta/sendfile/OTP-9240'Lukas Larsson
* ta/sendfile/OTP-9240: (31 commits) Add sendfile server printouts Skip recv/send during tests for fallback platforms Remove header/trailer support Remove windows implementation Expand sendfile documentation Only allow tcp sockets as target for sendfile Move sendfile api to file module Preliminary work on header/trailer Use free_sendfile explicitly for non-async Remove debug printouts Add tests for send/recv/sendfile interactions Remove tests for file_server sendfile sendfile caller now has to be the controlling_process Remove support for file_server, sendfile has to be raw Set chunk size to 3 GB Change type of fd to be ErlDrvEvent Add ifdef's for HAVE_SENDFILE Fix freebsd support for sendfile Change nbytes to 64 bit Implement ignorefd for TCP ...
2011-11-30Merge branch 'bjorn/llvm-issues/OTP-9712'Björn Gustavsson
* bjorn/llvm-issues/OTP-9712: INSTALL.md: Update build instructions for Lion Fix clang linking problem configure: Define NO_JUMP_TABLE if all we have is llvm-gcc beam_emu.c: Eliminate warnings when NO_JUMP_TABLE is defined beam_emu.c: Use the correct void* type for computed gotos MacOS X: Completely remove obsolete -no-cpp-precomp option
2011-11-30Merge branch 'tn/inet_drv-fix'Raimo Niskanen
* tn/inet_drv-fix: Cleanup - remove unnecesary bracket level and configure for ifreq.ifr_enaddr Work around gcc linking with own view of default libs on Solaris Use libdlpi to get physical address
2011-11-30erts: Configure check for SCTP features only when sctp.h is foundRaimo Niskanen
2011-11-30Disable floating point exceptions on Mac OS X by defaultBjörn Gustavsson
Many test cases provoke printouts similar to: ERTS_FP_CHECK_INIT at 0x131fd218: detected unhandled FPE at 0x1 Until the problem has been identified and fixed, disable floating point exceptions by default on Mac OS X.
2011-11-29Implement file:sendfileTuncer Ayaz
Allow Erlang code to use sendfile() where available by wrapping it as file:sendfile/4 and file:sendfile/2. sendfile(2) - Linux man page: "sendfile() copies data between one file descriptor and another. Because this copying is done within the kernel, sendfile() is more efficient than the combination of read(2) and write(2), which would require transferring data to and from user space."
2011-11-29Cleanup - remove unnecesary bracket level and configure for ifreq.ifr_enaddrRaimo Niskanen
2011-11-29Work around gcc linking with own view of default libs on SolarisRaimo Niskanen
Also use 64-bit lib when necessary, specify runtime lib path for secondary dependency libs, and better check before using SIOCGIFHWADDR.
2011-11-25MacOS X: Completely remove obsolete -no-cpp-precomp optionBjörn Gustavsson
clang does not recognize the -no-cpp-precomp option and generates a warning. -no-cpp-precomp is an obsolete Apple-specific gcc option, which last had any effect in gcc 3.1 for Jaguar. Since we cannot build for Jaguar anyway, the configure test added in 8412a400e92d5cbcd is not needed.
2011-11-24Use libdlpi to get physical addressTrond Norbye
2011-11-18Merge branch 'pan/osx_gcc_fixes'Patrik Nyblom
* pan/osx_gcc_fixes: Fix typo in erts/configure.in Make OTP build w/alternative gcc on MacOS Lion OTP-9712
2011-11-18Merge branch 'sverk/hipe-without-fpe/OTP-9724'Sverker Eriksson
* sverk/hipe-without-fpe/OTP-9724: otp_build: Disable FPE by default on Linux stdlib: Make sure qlc_SUITE:otp_6964 restores backtrace_depth erts: Add test for inf/NaN intermediate float results hipe,erts: Allow hipe without floating point exceptions hipe: Fix bug in hipe_rtl_lcm:calc_killed_expr_bb erts: Rename macros used by float instructions without FPE
2011-11-17erts: Fixes for SCTP on old Solaris 10Raimo Niskanen
2011-11-17erts: Default enable SCTP in configureRaimo Niskanen
2011-11-17hipe,erts: Allow hipe without floating point exceptionsSverker Eriksson
2011-11-17erts: Use SCTP functions in default libsRaimo Niskanen
On e.g FreeBSD the functions sctp_bindx() and sctp_peeloff() do not require any extra linkage library flags and there is no dynamic lib to load for them; use configure to find them.
2011-11-16Fix typo in erts/configure.inPatrik Nyblom
2011-11-16Make OTP build w/alternative gcc on MacOS LionPatrik Nyblom
Requires own build of wxMac for wx to work: $ arch_flags="-arch i386" $ ./configure CFLAGS="$arch_flags" CXXFLAGS="$arch_flags" \ CPPFLAGS="$arch_flags" LDFLAGS="$arch_flags" OBJCFLAGS="$arch_flags" \ OBJCXXFLAGS="$arch_flags" --prefix=/usr/local \ --with-macosx-sdk=/Developer/SDKs/MacOSX10.6.sdk \ --with-macosx-version-min=10.6 --enable-unicode --with-opengl $ make $ sudo make install - and we have macports gcc 4.5 in /opt/local/bin, so we configure and build OTP like this for 32bit (which is required for wx): $ cd $ERL_TOP $ PATH=/usr/local/bin:$PATH CC=/opt/local/bin/gcc-mp-4.5 CXX=/opt/local/bin/g++-mp-4.5 ./configure --enable-m32-build $ MAKEFLAGS="-j6" PATH=/usr/local/bin:$PATH make
2011-10-11Merge branch 'bjorn/some-configure-clean-ups'Björn Gustavsson
* bjorn/some-configure-clean-ups: erts/configure.in: Remove test for reversed setvbuf() arguments erts/configure.in: Remove broken support for System V erts/configure.in: Don't check for the presence of mach-o/dyld.h erts/configure.in: Remove useless --disable-fixalloc option
2011-10-06Merge branch 'ia/ssl/remove-old-ssl/OTP-7048'Ingela Anderton Andin
* ia/ssl/remove-old-ssl/OTP-7048: Remove old ssl implementation and deprecated function ssl:peercert/1 Conflicts: lib/ssl/test/Makefile
2011-09-23Merge branch 'dev' into majorMicael Karlberg
Conflicts: lib/inets/doc/src/notes.xml lib/inets/src/inets_app/inets.appup.src lib/inets/test/httpc_cookie_SUITE.erl lib/inets/vsn.mk
2011-09-21Remove static ssl linking in crypto for otp_buildBjörn-Egil Dahlberg
2011-09-16Remove old ssl implementation and deprecated function ssl:peercert/1Ingela Anderton Andin
2011-09-08Merge branch 'dev' into majorHenrik Nord
2011-09-08Merge branch 'dc/fix_win32_static_crypto' into devHenrik Nord
* dc/fix_win32_static_crypto: Fix win32 OpenSSL static linking broken in 20c9d6e OTP-9532
2011-09-08erts/configure.in: Remove test for reversed setvbuf() argumentsBjörn Gustavsson
The test is not needed, because no code tests whether SETVBUF_REVERSED is defined. Furthermore, AC_FUNC_SETVBUF_REVERSED is now documented like this: Do nothing. Formerly, this macro checked whether setvbuf takes the buffering type as its second argument and the buffer pointer as the third, instead of the other way around, and defined SETVBUF_REVERSED. However, the last systems to have the problem were those based on SVR2, which became obsolete in 1987, and the macro is no longer needed.
2011-09-08erts/configure.in: Remove broken support for System VBjörn Gustavsson
If we are compiling on System V, the symbols NO_WEAK_PRAGMA and SOCKOPT_CONNECT_STAT are defined, but they are never used.
2011-09-08erts/configure.in: Don't check for the presence of mach-o/dyld.hBjörn Gustavsson
We no longer include mach-o/dyld.h (because we only support MacOS X versions that have dlopen()).
2011-09-08erts/configure.in: Remove useless --disable-fixalloc optionBjörn Gustavsson
./configure --disable-fixalloc does not do anytning any longer, since there is no longer any "fix allocators" (in the original sense).
2011-09-01Merge branch 'dev' into majorHenrik Nord
2011-08-11Fix win32 OpenSSL static linking broken in 20c9d6eDave Cottlehuber
2011-08-08pcre: Rename Makefile.in to pcre.mk and include itBjörn Gustavsson
To avoid issues with parallel make and to slightly speed up the build process, avoid a recursive make by replacing pcre/Makefile.in with pcre/pcre.mk and including it from the main emulator Makefile.
2011-06-13Document fdatasync -lrt requirement (SunOS <= 5.10)Tuncer Ayaz
2011-06-09Move fdatasync autoconf checks to proper placeTuncer Ayaz
2011-05-18Merge branch 'pan/win_static_openssl/OTP-9280' into devPatrik Nyblom
* pan/win_static_openssl/OTP-9280: Mend --with-ssl= in erts/configure Update OpenSSL license text in crypto Link OpenSSL libraries static on Windows
2011-05-13Mend --with-ssl= in erts/configurePatrik Nyblom
2011-05-10Link OpenSSL libraries static on WindowsPatrik Nyblom
2011-05-09Expand the use of high memory allocation in halfword emulatorSverker Eriksson
Also add 'low' field in system_info(allocator) SHORT_LIVED is still in low memory
2011-04-08Merge branch 'hw/epmd-bind-to-address' into devHenrik Nord
* hw/epmd-bind-to-address: Allow user to specify the IP address epmd binds to OTP-9213