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* ms/pcre-security:
Fix CVE-2008-2371 (outer level option with alternatives caused crash).
OTP-8438 The re module: A regular expression with an option change at the
start of a pattern that had top-level alternatives could cause
overwriting and/or a crash. (Thanks to Michael Santos.)
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* jn/supervisor_child_count_only:
Add count_children/1 to supervisor.erl to determine the number of
OTP-8436 Added supervisor:count_children/1 to count the number of children
being managed without the memory impact of which_children/1.
(Thanks to Jay Nelson.)
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* ks/stdlib-cleanups:
stdlib: clean up as suggested by tidier
OTP-8435: ks/stdlib-cleanups
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environment after a number of bugs are fixed and some features
are added in the documentation build process.
- The arity calculation is updated.
- The module prefix used in the function names for bif's are
removed in the generated links so the links will look like
"http://www.erlang.org/doc/man/erlang.html#append_element-2"
instead of
"http://www.erlang.org/doc/man/erlang.html#erlang:append_element-
2".
- Enhanced the menu positioning in the html documentation when a
new page is loaded.
- A number of corrections in the generation of man pages (thanks
to Sergei Golovan)
- The legal notice is taken from the xml book file so OTP's build
process can be used for non OTP applications.
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The patch is from:
http://vcs.pcre.org/viewvc?revision=360&view=revision
Test case:
re:compile(<<"(?i)[\xc3\xa9\xc3\xbd]|[\xc3\xa9\xc3\xbdA]">>, [unicode]).
An option change at the start of a pattern that had top-level
alternatives could cause overwriting and/or a crash.
This potential security problem was recorded as CVE-2008-2371.
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OTP-8433: Kenji Rikitake
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children being managed without the memory impact of which_children/1
The function which_children/1 returns a list of the child processes
currently being supervised, but it has the penalty of creating a new
list thereby consuming more memory. In low memory situations it is
often desirable to know which supervisor may have generated many
processes, but the act of discovering the culprit should not cause the
node to crash (or worse a different node if the kernel kills one
randomly). The new function count_children/1 can give an indication
of which supervisor is taxing resources the most without adding to the
burden. Rather than creating a new list, it walks the supervisor's
internal children structure using an accumulator function so that any
used memory can be incrementally collected yet the resulting count can
still be obtained.
The return result of count_children/1 is a property list of counts
containing:
- {specs, Total_Num_Child_Specs}
- {active, Num_Active_Child_Processes_Of_Supervisor_Or_Worker_Type}
- {supervisors, Num_Supervisor_Type_Children_Including_Dead_Processes}
- {workers, Num_Worker_Type_Children_Including_Dead_Processes}
This patch was made in response to mailing list discussions of the
problem diagnosing heavily taxed production systems. I cannot find
the original request, but http://www.erlang.org/cgi-bin/ezmlm-cgi/4/35060
is my original post of the patch.
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prompt strings (io:get_line/{1,2}). io_lib is also updated to
format prompts with the 't' modifier (i.e. ~ts instead of ~s).
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* egil/lcnt:
Add test suite for lcnt in tools
Add lcnt:rt_opt/1 bindings to erts_debug
Add runtime option to enable/disable lcnt stats
Add auto width on string output
Add lcnt documentation
Add lock profiling tool
OTP-8424 Add lock profiling tool.
The Lock profiling tool, lcnt, can make use of the internal lock
statistics when the runtime system is built with this feature
enabled.
This provides a mechanism to examine potential lock bottlenecks
within the runtime itself.
- Add erts_debug:lock_counters({copy_save, bool()}). This option
enables or disables statistics saving for destroyed processes and
ets-tables. Enabling this might consume a lot of memory.
- Add id-numbering for lock classes which is otherwise undefined.
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* ks/erl_lint:
erl_lint_SUITE: adjust failing test case
Allow recursive types and check for undefined types
OTP-8421: ks/erl_lint
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* ks/compiler:
compiler: keep line numbers for attributes
compiler Makefile: alphabetize module names
compile.erl: eliminate compiler warning
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In the future, we might want to generate warnings
for attributes, referring to them with line numbers.
sys_pre_expand used to replace line number for attributes
with 0. Change sys_pre_expand to retain the real line
number.
v3_core used to throw away the line numbers. Change
v3_core so that it retains the line numbers in annotations.
While at it, do some tidying as suggested by tidier.
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* egil/egd_render:
Fix egd_render transparent to use float constants
OTP-8425 Fix egd_render transparent to use float constants.
The render engine has float guards to enhance beam code
generation. However, the default case used integers which caused
the engine to crash. This is now fixed.
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* mp/hipe_unified_loader:
hipe_unified_loader: only block SMP scheduling when necessary
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* rani/inet_gethostbyname_fixes:
inet_res_SUITE: testcase fixes for legacy DNS resolver (Solaris 8)
inet_res: /etc/resolv.conf: use domain as default search list
inet: delayed/avoided read of /etc/resolv.conf and /etc/hosts
inet_gethost_native: workaround for empty result hostname on MacOS X
inet_res_SUITE: testcase fix for empty domain name
inet:gethostbyname improved to parse IP strings and look up own hostname
OTP-8426 The resolver routines failed to look up the own node name as
hostname, if the OS native resolver was erroneously configured,
bug reported by Yogish Baliga, now fixed.
The resolver routines now tries to parse the hostname as an IP
string as most OS resolvers do, unless the native resolver is
used.
The DNS resolver inet_res and file resolver inet_hosts now do not
read OS configuration files until they are needed. Since the
native resolver is default, in most cases they are never needed.
The DNS resolver's automatic updating of OS configuration file
data (/etc/resolv.conf) now uses the 'domain' keyword as default
search domain if there is no 'search' keyword.
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Hans Bolinder (the author/maintainer of qlc) prefers
for readability reasons to use length/1 in a guard
when it is known that the list is guaranteed to be
short, so the change suggested by tidier for line 875
of qlc_pt has not been included.
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Errors are now reported slightly differently, so we'll
need to adjust the test case.
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Contains four kinds of changes:
* Allows recursive types and type definitions to be in any order.
* Because the checking is not performed from top to bottom, there
is a separate pass which checks for undefined module-local types.
* Behaviour callbacks which allow specs in them.
* Clean up the code as suggested by tidier.
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When the search list option in /etc/resolv.conf was empty, the
domain option was not used as default search domain.
That has been fixed in this patch.
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The 'file' and 'dns' lookup methods configuration files
are now read and parsed at the time of the first lookup
instead of at boot time when per default none of these
lookup methods are used.
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On MacOS X the getaddrinfo function apparently can return a result
without canonical hostname e.g when looking up a IPv6 address
string as hostname. The receiving erlang code was not prepared
for that and this patch does a workaround by using the
search string as default value for canonical hostname.
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Now inet:gethostbyname tries to parse the hostname as an IP string
first if the 'native' lookup method is not used. One can also
make the IP string parsing explicit using the new 'string'
lookup method, or avoid it using the new pseudo lookup
method 'nostring'.
In R13B04 a bug was introduced when the gethostbyname code
was rewritten, so if the native resolver was used and
misconfigured to not be able to look up the own hostname,
inet:gethostbyname also failed. This is now fixed.
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This avoids costly scheduling changes during module loading if native
code is disabled in erts, or not present in the module being loaded.
Signed-off-by: Mikael Pettersson <[email protected]>
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Runtime options for copy_save.
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Documentation for the lock profiling tool
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The Lock profiling tool, lcnt, can make use of the internal lock statistics
when the runtime system is built with this feature enabled.
This provides a mechanism to examine potential lock bottlenecks within
the runtime itself.
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* sc/sctp-connect-nowait:
Implement a non-blocking SCTP connect
OTP-8414 There are new gen_sctp:connect_init/* functions that initiate an
SCTP connection without blocking for the result. The result is
delivered asynchronously as an sctp_assoc_change event. (Thanks
to Simon Cornish.)
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* po/odbc-update-delete-no-rows:
SQL_NO_DATA and SQLSTATE 00000 indicate success for updates/deletes that affect no rows
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* ta/code_clash_ez:
code_SUITE: add missing is_list(Config) guard
Add tests for code:clash/0
Fix handling of archive (.ez) files in code:clash/0
OTP-8413 code:clash/0 now looks inside archives (.ez files). (Thanks to
Tuncer Ayaz.)
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This patch adds a new set of functions - gen_sctp:connect_init/* that initiate
an SCTP connection without blocking for the result. The result is delivered
asynchronously as an sctp_assoc_change event.
The new functions have the same API as documented for gen_sctp:connect/* with
the following exceptions:
* Timeout is only used to supervise resolving Addr (the peer address)
* The possible return values are ok | {error, posix()}
The caller application is responsible for receiving the #sctp_assoc_change{}
event and correctly determining the connect it originated from (for example,
by examining the remote host and/or port). The application should have at
least {active, once} or use gen_sctp:recv to retrieve the connect result.
The implementation of gen_sctp:connect suffers from a number of
shortcomings which the user may avoid by using gen_sctp:connect_init and
adding code to receive the connect result.
First, irrespective of the Timeout value given to gen_sctp:connect, the OS
attempts and retries the SCTP INIT according to various kernel parameters. If
the Timeout value is shorter than the entire attempt then the application will
still receive an sctp_assoc_change event after the {error, timeout} is
returned from the initial call. This could be somewhat confusing (either to
the application or the designer!) especially if the status is
comm_up. Subsequent calls to connect before the OS has finished this process
return {error, ealready} which may also be counter-intuitive.
Second, there is a race-condition (documented in comments in inet_sctp.erl)
that can cause the wrong sctp_assoc_change record to be returned to an
application calling gen_sctp:connect. The race seriously affects connection
attempts when using one-to-many sockets.
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Add first batch of tests for code:clash/0.
Signed-off-by: Tuncer Ayaz <[email protected]>
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* dgud/wx_list_ctrl:
Generate without trailing spaces
Fix correct starting copyright year
Do not emit trailing whitespace
Added tests for wxListCtrl:getItem/2.
Added wxListCtrl:getEditCtrl (not available on Mac)
OTP-8408 Added wxListCtrl:getEditCtrl/1 (not available on Mac).
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* egil/gitignore:
Ignore files generated when running/building tests
Update .gitignore files
OTP-8411: egil/gitignore
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code:clash/0 did not take into account .ez files
when listing contents of code path entries.
Using erl_prim_loader:list_dir/1 instead of
file:list_dir/1 fixes the problem.
Signed-off-by: Tuncer Ayaz <[email protected]>
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configuration parameter shell_prompt_func can be used for
customizing the Erlang shell prompt.
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