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authorErlang/OTP <otp@erlang.org>2011-05-24 13:16:24 +0200
committerErlang/OTP <otp@erlang.org>2011-05-24 13:16:24 +0200
commit4a5a75811e2cd590b5c94f71864a5245fd511ccf (patch)
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</header>
<p>This document describes the changes made to the ERTS application.</p>
+<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>