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per-parcel filtering. Reviewed by Kelly
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testing mode.
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The change from LLProcessLauncher to LLProcess introduces the possibility of a
NULL (default-constructed) LLProcessPtr. Add certain static LLProcess methods
accepting LLProcessPtr, forwarding to nonstatic method when non-NULL but doing
something reasonable with NULL. Use these methods in LLPLuginProcessParent.
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Now LLProcess explicitly requests APR to limit the handles passed to any child
process, instead of wantonly passing whatever happens to be lying around the
parent process at the time.
This requires the latest APR build.
Also revert LLUpdateDownloader::Implementation::mDownloadStream to llofstream
(as in rev 1878a57aebd7) instead of apr_file_t*. Using APR for that file was a
Band-Aid -- a single whacked mole -- for the problem more systemically
addressed by apr_procattr_constrain_handle_set().
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llphysicsextension library.
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On Windows, calling CreateProcess(bInheritHandles=FALSE) is the wrong idea. In
that case, CreateProcess() passes NO handles -- even the files you've
explicitly designated as the child's stdin, stdout, stderr in the STARTUPINFO
struct! Remove LLProcess code to tweak bInheritHandles; we should also remove
the corresponding (useless) APR extension.
Instead, given that the Windows file-locking problem we've observed is
specific to the viewer installer .exe file downloaded by the background
updater logic, use APR file I/O for that specific file. Empirically, both
llofstream and std::ofstream seem to make the open file handle inheritable;
but apr_file_open() documentation says: "By default, the returned file
descriptor will not be inherited by child processes created by
apr_proc_create()." And indeed, it does appear to sidestep the locking problem.
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That is, when the underlying LLError::Settings object is destroyed -- possibly
at termination, possibly on LLError::restoreSettings() -- the passed Recorder*
is deleted.
There was much existing code that seemed as unaware of this alarming fact as I
was myself. Passing to addRecorder() a pointer to a stack object, or to a
member of some other object, is just Bad. It might be preferable to make
addRecorder() accept std::auto_ptr<Recorder> to make the ownership transfer
more explicit -- or even boost::shared_ptr<Recorder> instead, which would
allow the caller to either forget or retain the passed Recorder.
This preliminary pass retains the Recorder* dumb pointer API, but documents
the ownership issue, and eliminates known instances of passing pointers to
anything but a standalone heap Recorder subclass object.
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On Windows, Bad Things happen when apr_proc_create() is allowed to pass TRUE
to CreateProcess(bInheritHandles). For instance, the open handle for a new
installer executable file being downloaded by the background updater gets
inadvertently passed to a couple slplugin.exe instances. When the viewer
finishes downloading, closes the file and tries to remove it, Windows balks
because the file is still open by another process. Require an apr_suite
package that includes the new Linden apr_procattr_inherit_set() extension, and
call it to turn off CreateProcess(bInheritHandles).
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Attempting to debug an observed LLFile::remove() failure, I was floored to
find that remove() made no attempt whatsoever to report its lack of success!
Add warnif() function to log errno text in platform-dependent way. Support the
notion that for some functions, certain errno values are acceptable -- e.g. we
expect stat() to frequently hit ENOENT -- and need not be logged.
Add commented-out Windows-specific logic to try to provide further information
in the case of EACCES ("Permission denied," e.g. another process has the file
open). To use, enable the code block, download handle.exe and turn on DEBUG
logging for LLFile. handle.exe can be obtained from:
http://technet.microsoft.com/en-us/sysinternals/bb896655
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mouse clicks.
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In a number of places, the viewer uses a lookup based on std::type_info*. We
used to use std::map<std::type_info*, whatever>. But on Linux,
&typeid(SomeType) can produce different pointer values, depending on the
dynamic load module in which the code is executed. Introduce
LLTypeInfoLookup<T>, with an API that deliberately mimics
std::map<std::type_info*, T>. LLTypeInfoLookup::find() first tries an
efficient search for the specified std::type_info*. But if that fails, it
scans the underlying container for a match on the std::type_info::name()
string. If found, it caches the new std::type_info* to optimize subsequent
lookups with the same pointer.
Use LLTypeInfoLookup instead of std::map<std::type_info*, ...> in
llinitparam.h and llregistry.h.
Introduce LLSortedVector<KEY, VALUE>, a std::vector<std::pair<KEY, VALUE>>
maintained in sorted order with binary-search lookup. It presents a subset of
the std::map<KEY, VALUE> API.
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At various points along the way, before the process changed, we merged up to
viewer-development. One of those must have picked up an llversionviewer.h
change to viewer version 3.3.1.0. We have no intention of twiddling
llversionviewer.h in this repo -- reset so merging into viewer-release doesn't
bump its version number.
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Every LEAP plugin gets its own LLLeapListener, managing its own collection of
listeners to various LLEventPumps. LLLeapListener's command LLEventPump now
has a UUID for a name, both for uniqueness and to make it tough for a plugin
to mess with any other.
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Have to pump "mainloop" a few times to flush the buffer to the pipe, a
potentially risky strategy: we have to trust that whatever condition led to
the LL_ERRS fatal error didn't break anything that listens on "mainloop". But
the worst that could happen is that the plugin won't be notified -- just as if
we didn't try in the first place. In other words, no harm in trying.
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Certain use cases need to know whether the WritePipe buffer has been flushed
to the pipe, or is still pending.
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This test must not be subject to spurious environmental failures, else some
kind soul will disable it entirely. We observe that APR specifies a hard-coded
buffer size of 64Kbytes for pipe creation -- use that and cross fingers.
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Sigh, the rejoicing was premature.
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If in fact we've managed to fix the APR bug writing to a Windows named pipe,
it should no longer be necessary to try to work around it by testing with a
much smaller data volume on Windows!
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