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Diffstat (limited to 'erts/doc/src/notes.xml')
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1 files changed, 725 insertions, 2 deletions
diff --git a/erts/doc/src/notes.xml b/erts/doc/src/notes.xml index e91839572b..4cef9669dd 100644 --- a/erts/doc/src/notes.xml +++ b/erts/doc/src/notes.xml @@ -4,7 +4,7 @@ <chapter> <header> <copyright> - <year>2004</year><year>2010</year> + <year>2004</year><year>2011</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -30,6 +30,711 @@ </header> <p>This document describes the changes made to the ERTS application.</p> +<section><title>Erts 5.8.5</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Several bugs concerning constant binary constructions + such as <<0:4294967295>> have been corrected. + Depending on the actual size of the binary and the type + of run-time system (32-bit, halfword, 64-bit), such + expression could either crash the run-time system or make + the loader refuse loading of the module.</p> + <p> + Own Id: OTP-9284</p> + </item> + <item> + <p> + The Erlsrv utility failed to stop the erlang machine if + no StopAction was defined when the service was stopped. + This is now corrected.</p> + <p> + Own Id: OTP-9344</p> + </item> + <item> + <p> + Due to a bug in glibc the runtime system could abort + while trying to destroy a mutex. A fix for this was + introduced in R14B02. This fix did, however, not solve + the problem. The runtime system will now issue a warning + instead of aborting.</p> + <p> + Own Id: OTP-9373 Aux Id: OTP-9009 </p> + </item> + <item> + <p> + Replace atom in DRV macro in prim_file with string</p> + <p> + An experimental version of Dialyzer discovered that the + atom that replaced the DRV macro in prim_file ends up in + calls to erlang:open_port({spawn, Driver}, Portopts) as + the Driver argument. The documentation states that this + call requires a string there.</p> + <p> + This change is also consistent with the one introduced in + commit 0f03b1e9d2bef3bc830c31a369261af4c5234727 by Kostis + Sagonas.</p> + <p> + Own Id: OTP-9377</p> + </item> + <item> + <p> + Fix typos in the epmd documentation (Thanks to Holger + Wei� )</p> + <p> + Own Id: OTP-9387</p> + </item> + <item> + <p> + Fix faulty integer terms created by NIF API from 64-bit + integers on halfword emulator. (Thanks to Paolo Negri and + Paul Davis)</p> + <p> + Own Id: OTP-9394</p> + </item> + <item> + <p> + Fix <c>epmd</c> crash on vxworks caused by faulty + argument to select() system call.</p> + <p> + Own Id: OTP-9427 Aux Id: seq11855 </p> + </item> + <item> + <p> + The ets:test_ms function could in rare cases truncate the + error messages. This is now corrected.</p> + <p> + Own Id: OTP-9435</p> + </item> + <item> + <p> + Fix bug related to hibernate and HiPE (clear + F_HIBERNATE_SCHED flag)</p> + <p> + F_HIBERNATE_SCHED flag that was introduced in + b7ecdcd1ae9e11b8f75e must be cleared in hipe_mode_switch + as well. Otherwise, processes running HiPE code that + hibernate, wake up and then trap into a BIF will not be + rescheduled.(Thanks to Paul Guyot)</p> + <p> + Own Id: OTP-9452</p> + </item> + <item> + <p> + Fix bug in FreeBSD topology detection code (Thanks to + Paul Guyot)</p> + <p> + Own Id: OTP-9453</p> + </item> + <item> + <p> + Fix use of logical operator && with constant + operand instead of bitwise & (Thanks to Cristian + Greco)</p> + <p> + Own Id: OTP-9454</p> + </item> + <item> + <p> + inet: error if fd does not match socket domain</p> + <p> + If an IPv4 fd is opened as an IPv6 socket, unexpected + behaviour can occur. For example, if an IPv4 UDP socket + is opened and passed into Erlang as an IPv6 socket, the + first 3 bytes (corresponding to 1 byte representing the + protocol family, 2 bytes set to the port) are stripped + from the payload. The cause of the UDP payload truncation + happens in inet_drv.c:packet_inet_input when a call to + inet_get_address fails silently because the family is set + to PF_INET6 but the buffer len is the size of an IPv4 + struct sockaddr_in.</p> + <p> + (Thanks to Andrew Tunnell-Jones for finding the bug and + the test case!)</p> + <p> + Own Id: OTP-9455</p> + </item> + <item> + <p> + erts: use a union to avoid strict aliasing issues</p> + <p> + Use a union for pointer type conversion to avoid compiler + warnings about strict-aliasing violations with gcc-4.1. + gcc >= 4.2 does not emit the warning. erts: adapt + matrix_nif to R14 erl_nif API changes (Thanks To Tuncer + Ayaz)</p> + <p> + Own Id: OTP-9487</p> + </item> + <item> + <p> + fix 64-bit issues in the garbage collection (Thanks to + Richard Carlsson)</p> + <p> + Own Id: OTP-9488</p> + </item> + <item> + <p> + epmd: fix compiler warnings</p> + <p> + Suppress compiler warnings about ignored return values. + (Thanks to Michael Santos )</p> + <p> + Own Id: OTP-9500</p> + </item> + <item> + <p> + Fix non-existing function (erlang:disconnect/1) in + distributed reference manual (Thanks to Fabian Kr�l)</p> + <p> + Own Id: OTP-9504</p> + </item> + <item> + <p> + Document fdatasync -lrt requirement (SunOS <= 5.10) + (Thanks to Tuncer Ayaz)</p> + <p> + Own Id: OTP-9512</p> + </item> + <item> + <p> + Let epmd ignore empty ERL_EPMD_ADDRESS</p> + <p> + If the environment variable ERL_EPMD_ADDRESS is set to + the empty string, empd now behaves like it does by + default when ERL_EPMD_ADDRESS is unset. That is, in this + case, epmd now listens on all available interfaces + instead of using only the loopback interface, which + happened because epmd added the loopback address to the + (in this case empty) list of addresses specified via + ERL_EPMD_ADDRESS.</p> + <p> + Also, epmd now ignores ERL_EPMD_ADDRESS if it contains + only separator characters (comma and space).</p> + <p> + The same applies to epmd's -address option.(Thanks to + Holger Wei�)</p> + <p> + Own Id: OTP-9525</p> + </item> + <item> + <p> + Remove dead code in erl_compile (Thanks to Tuncer Ayaz)</p> + <p> + Own Id: OTP-9527</p> + </item> + <item> + <p> + Add erlang:external_size/2 BIF</p> + <p> + This BIF's second parameter is a list of options. + Currently the only allowed option is {minor_version, + Version} where version is either 0 (default) or 1. + (Thanks to Filipe David Manana )</p> + <p> + Own Id: OTP-9528</p> + </item> + <item> + <p> + Fix enif_compare on 64bits machines</p> + <p> + In 64bits machines the Sint type has a size of 8 bytes, + while on 32bits machines it has a 4 bytes size. + enif_compare was ignoring this and therefore returning + incorrect values when the result of the CMP function + (which returns a Sint value) doesn't fit in 4 bytes. + (Thanks to Filipe David Manana)</p> + <p> + Own Id: OTP-9533</p> + </item> + <item> + <p> + Implement or fix -Werror option</p> + <p> + If -Werror is enabled and there are warnings no output + file is written. Also make sure that error/warning + reporting is consistent. (Thanks to Tuncer Ayaz)</p> + <p> + Own Id: OTP-9536</p> + </item> + <item> + <p>In some rare cases we did not have a run queue when + scheduling misc ops. This is now fixed.</p> + <p> + Own Id: OTP-9537</p> + </item> + <item> + <p>Remove misc. compiler warnings</p> + <p> + Own Id: OTP-9542</p> + </item> + <item> + <p> + Two bugs in gen_sctp has been corrected: getopts/setopts + hence also send could only be called from socket owner, + and options 'linger', 'rcvbuf' and 'sndbuf' was read from + wrong protocol layer hence read wrong values by getopts.</p> + <p> + Own Id: OTP-9544</p> + </item> + <item> + <p> + Erlang/OTP can now be built on MacOS X Lion.</p> + <p> + Own Id: OTP-9547</p> + </item> + <item> + <p> XML files have been corrected. </p> + <p> + Own Id: OTP-9550 Aux Id: OTP-9541 </p> + </item> + <item> + <p> + Fix potential errors inspired by running cppcheck(1) + (Thanks to Christian von Roques)</p> + <p> + Own Id: OTP-9557</p> + </item> + <item> + <p>When auxiliary work was enqueued on a scheduler, the + wakeup of the scheduler in order to handle this work + could be lost. Wakeups in order to handle ordinary work + were not effected by this bug. The bug only effected + runtime systems with SMP support as follows:</p> <list> + <item>Deallocation of some ETS data structures could be + delayed.</item> <item>On Linux systems not using the NPTL + thread library (typically ancient systems with kernel + versions prior to 2.6) and Windows systems, the <c>{Port, + {exit_status, Status}}</c> message from a terminating + port program could be delayed. That is, it only effected + port programs which had been started by passing + <c>exit_status</c> as an option to + <c>open_port/2</c>.</item> </list> + <p> + Own Id: OTP-9567</p> + </item> + <item> + <p> + Handle rare race in the crypto key server functionality</p> + <p> + Own Id: OTP-9586</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> Types and specifications have been added. </p> + <p> + Own Id: OTP-9356</p> + </item> + <item> + <p> + New allocator strategy "address order first fit". May + ease the emptying of memory carriers and thereby real + release of memory back to the OS.</p> + <p> + Own Id: OTP-9424</p> + </item> + <item> + <p> + The new <c>erlang:check_old_code/1</c> BIF checks whether + a module has old code.</p> + <p> + Own Id: OTP-9495</p> + </item> + <item> + <p> Update documentation and specifications of some of + the zlib functions. </p> + <p> + Own Id: OTP-9506</p> + </item> + <item> + <p> + Detect the available CPUs on IRIX</p> + <p> + Add support for querying the number of configured and + online processors on SGI systems running IRIX.(Thanks to + Holger Wei�)</p> + <p> + Own Id: OTP-9531</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 5.8.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fix binary and iolist overflow problems. Typically + problems arose in length calculation where the result + would exceed (1 bsl 32 - 1).</p> + <p> + Own Id: OTP-9118</p> + </item> + <item> + <p> + Using the old erlang shell (i.e. erl instead on werl) on + windows and doing several init:restart's would eventually + hang the VM. That is no longer the case.</p> + <p> + Own Id: OTP-9139</p> + </item> + <item> + <p> + Removed recursive C code when printing Erlang terms to + buffers, avoiding stack overflows that could cause VM to + crash.</p> + <p> + Own Id: OTP-9140</p> + </item> + <item> + <p> + The send_timeout option in gen_tcp did not work properly + in active mode or with {active,once} options. This is now + corrected.</p> + <p> + Own Id: OTP-9145</p> + </item> + <item> + <p> + Fixed various typos across the documentation (Thanks to + Tuncer Ayaz)</p> + <p> + Own Id: OTP-9154</p> + </item> + <item> + <p>Remove duplicate stack entries which could occur after + calling certain BIFs.</p> + <p> + Own Id: OTP-9163</p> + </item> + <item> + <p> + A race when starting two nodes simultaneously using + run_erl has been removed.</p> + <p> + Own Id: OTP-9164</p> + </item> + <item> + <p> + Add documentation on .erlang processing back again + (Thanks to Gabor Liptak)</p> + <p> + Own Id: OTP-9189</p> + </item> + <item> + <p> + Remove gratuitous paren in driver_entry(Thanks to Tuncer + Ayaz)</p> + <p> + Own Id: OTP-9192</p> + </item> + <item> + <p> + Fix some wrong pointer dereferences (Thanks to Cristian + Greco)</p> + <p> + Own Id: OTP-9194</p> + </item> + <item> + <p> + erts: Remove unused variables (Thanks to Tuncer Ayaz)</p> + <p> + Own Id: OTP-9205</p> + </item> + <item> + <p> + The documentation for <c>init:get_args/0</c> has been + removed. <c>init:get_args/0</c> itself was deprecated in + R9C and removed in R12B. (Thanks to Eric Pailleau.)</p> + <p> + Own Id: OTP-9209</p> + </item> + <item> + <p> + Allow user to specify the IP address epmd binds to</p> + <p> + The IP address(es) epmd binds to can now be specified by + the user, either via epmd's new "-address" option or (if + that's not used) by setting the environment variable + ERL_EPMD_ADDRESS. Multiple addresses may be specified + using a comma-separated list. If the loopback address is + not in this list, it will be added implicitly, so that + the daemon can be queried by an interactive epmd + process.(Thanks to Holger Wei�)</p> + <p> + Own Id: OTP-9213</p> + </item> + <item> + <p> + epmd: include host address in local access check</p> + <p> + In FreeBSD jails, the source and destination address of + connections to localhost are changed to be the IP address + of the jail. Consider connections from the host's IP + address to itself (e.g., the source and destination + address match) to be local for the access control checks. + (Thanks to Michal Santos and Tom at diogunix.com)</p> + <p> + Own Id: OTP-9214</p> + </item> + <item> + <p> + Fix list returned by net_kernel:epmd_module</p> + <p> + Function epmd_module of net_kernel returns a list instead + of an atom, when the epmd_module-flag is used. (Thanks to + Markus Knofe)</p> + <p> + Own Id: OTP-9215</p> + </item> + <item> + <p> + Fix epmd's dbg_perror() output</p> + <p> + The dbg_perror() function now hands the current errno + value over to dbg_gen_printf(). This fixes the problem + that errno had been reset to zero by the time it was used + (to print the corresponding error message) in the + dbg_gen_printf() function. (Thanks to Holger Wei�)</p> + <p> + Own Id: OTP-9223</p> + </item> + <item> + <p> + heart: remove garbage appended to heart command</p> + <p> + heart:get_cmd/0 is documented to return an empty string + if the command is cleared. get_cmd/0 returns 2 extra + bytes: 1 byte for the trailing null, 1 byte from the op + (the op is an unsigned char and 2 bytes are allocated for + it in the returned buffer). (Thanks to Michael Santos)</p> + <p> + Own Id: OTP-9224</p> + </item> + <item> + <p> + file: fix hang reading compressed files</p> + <p> + The gzio driver goes into an infinite loop when reading + past the end of a compressed file. Reported-By: Alex + Morarash (Thanks to Michael Santos)</p> + <p> + Own Id: OTP-9245</p> + </item> + <item> + <p>Eliminate alias warnings from gcc 4.5.2</p> + <p> + Own Id: OTP-9250</p> + </item> + <item> + <p> + Unsigned integer may overflow in error message (Thanks to + Michael Santos)</p> + <p> + Own Id: OTP-9251</p> + </item> + <item> + <p> + Driver names should be strings, not atoms</p> + <p> + Own Id: OTP-9253</p> + </item> + <item> + <p> + driver_entry: Remove gratuitous paren and fix typo + (Thanks to Tuncer Ayaz)</p> + <p> + Own Id: OTP-9254</p> + </item> + <item> + <p> + Fix format specifiers in erl_exit messages</p> + <p> + Fix an error message by using an unsigned integer + specifier as seen in a tweet by @metabrew: #erlang VM + crashed with "no next heap size found: -2090496108, + offset 0", suddenly allocated all available RAM</p> + <p> + Also correct mis-typed string formats in bif.c.(Thanks to + Michael Santos)</p> + <p> + Own Id: OTP-9262</p> + </item> + <item> + <p> + net_drv: remove unused tcp request id inet_drv: remove + gratuitous assignment (Thanks to Tuncer Ayaz)</p> + <p> + Own Id: OTP-9263</p> + </item> + <item> + <p> + Teach run_erl RUN_ERL_DISABLE_FLOWCNTRL for disabling + flow control</p> + <p> + Flow control can cause unwanted behaviour of the beam + process, if accidentally hit Ctrl-S (instead of Ctrl-D to + detach) the entire beam may be blocked.</p> + <p> + Fix this problem by making it possible to turn off flow + control by setting the environment variable + RUN_ERL_DISABLE_FLOWCNTRL. (Thanks to Jonas Faklkevik)</p> + <p> + Own Id: OTP-9270</p> + </item> + <item> + <p>The following bugs due to missing memory barriers have + been fixed:</p> <list> <item><p> ETS tables using the + <c>write_concurrency</c> option could potentially get + into an internally inconsistent state. </p></item> + <item><p> ETS tables using the <c>ordered_set</c> option + could potentially get into an internally inconsistent + state. </p></item> <item><p> A number of memory barriers + have been added when building with the + <c>libatomic_ops</c> API (i.e. when passing + <c>--with-libatomic_ops=PATH</c> to <c>configure</c>) and + the tilera atomics API (i.e. when building for the tilera + chip). Note that these bugs were due to erroneous usage + of the APIs, and not in the implementations of the APIs. + When using these APIs the following bugs where + present:</p> <list> <item><p> The BIF + <c>erlang:ports/0</c> could return an erroneous result. + </p></item> <item><p> A thread blocking other threads + during code loading, or setup of tracing could + potentially read invalid data. </p></item> <item><p> + Fixation of ETS tables could potentially get into an + internally inconsistent state. </p></item> </list> + </item> </list> + <p> + Own Id: OTP-9281</p> + </item> + <item> + <p> + Fix halfword bug for ETS ordered_set when doing + <c>select/match</c> with partly bound key.</p> + <p> + Own Id: OTP-9292</p> + </item> + <item> + <p> + Fix bug in <c>code:is_module_native</c> that caused crash + for deleted modules.</p> + <p> + Own Id: OTP-9298</p> + </item> + <item> + <p> + Calling <c>driver_async_cancel()</c> could cause a + scheduler thread to enter an eternal loop doing no useful + work. (Thanks to Anders Ramsell)</p> + <p> + Own Id: OTP-9302</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + New <c>enif_is_exception function</c> to allow NIFs to + determine whether an <c>ERL_NIF_TERM</c> represents an + exception. (Thanks to Steve Vinoski)</p> + <p> + Own Id: OTP-9150</p> + </item> + <item> + <p> + A process being garbage collected by another process + could be scheduled on another scheduler. This prevented + this scheduler from doing any useful work until the + garbage collection was done. This either occurred due to + a explicit call to the <c>garbage_collect/1</c> BIF, or + due to a garbage collection part of code loading. A + process being garbage collected like this will now not be + scheduled until the garbage collection has completed.</p> + <p> + Own Id: OTP-9211</p> + </item> + <item> + <p> + Remove unnecessary validation copy in + prim_file:drv_command/3 (Thanks to Tony Rogvall)</p> + <p> + Own Id: OTP-9276</p> + </item> + <item> + <p> + Symbolic link handling on windows have been slightly + updated to map error conditions more consequently and + correctly read directory links created outside of the + Erlang environment.</p> + <p> + Own Id: OTP-9279</p> + </item> + <item> + <p> + Due to standard library DLL mismatches between versions + of OpenSSL and Erlang/OTP, OpenSSL is now linked + statically to the crypto driver on Windows. This fixes + problems starting crypto when running Erlang as a service + on all Windows versions.</p> + <p> + Own Id: OTP-9280</p> + </item> + <item> + <p>Halfword emulator memory handling improvements:</p> + <list> <item><p>Much more of internal memory structures + have been made able to use "high" memory and are no + longer restricted to the 4Gb limit that still applies for + all process heap data.</p> </item> <item><p>Fixed faulty + values from <c>erlang:memory()</c> caused by 32-bit + counter overflow.</p> </item> <item><p>New counter + <c>low</c> in <c>erlang:memory()</c> that sums up all + memory restricted by 4Gb limit.</p> </item> </list> + <p> + Own Id: OTP-9291 Aux Id: seq11841 </p> + </item> + <item> + <p> + The value set in the undocumented and unsupported + ERL_version_FLAGS (e.g. ERL_R14B03_FLAGS) environment + variable can now be overridden by the command line + (similar to ERL_AFLAGS).</p> + <p> + Own Id: OTP-9297</p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 5.8.3.2</title> + + <section><title>Known Bugs and Problems</title> + <list> + <item> + <p> + Fix halfword emulator bug in <c>ets:select_delete</c> for + <c>ordered_set</c> that caused emulator to crash.</p> + <p> + Own Id: OTP-9258 Aux Id: seq11836 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 5.8.3.1</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -1582,6 +2287,24 @@ </section> +<section><title>Erts 5.7.5.2</title> + + <section><title>Known Bugs and Problems</title> + <list> + <item> + <p> + Two bugs in gen_sctp has been corrected: getopts/setopts + hence also send could only be called from socket owner, + and options 'linger', 'rcvbuf' and 'sndbuf' was read from + wrong protocol layer hence read wrong values by getopts.</p> + <p> + Own Id: OTP-9544</p> + </item> + </list> + </section> + +</section> + <section><title>Erts 5.7.5.1</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -4167,7 +4890,7 @@ The race occurred when a process removed a table during termination simultaneously as another process removed the same table via <c>ets:delete/1</c> and a third process - created a table that accidentaly got the same internal + created a table that accidentally got the same internal table index as the table being removed.</p> <p> Own Id: OTP-7349</p> |