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bugsplat shows KERNELBASE!RaiseException and flush() insread of forceErrorLLError, function crashes too early.
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Also freeStackBuffer() and all the funky classic-C string management of a big
flat buffer divided into exactly 512 128-byte strings. Define StringVector as
a std::vector<std::string>, and use that instead.
Retain the behavior of clearing the vector if it exceeds 512 entries.
This eliminates the LLError::Log::flush(const std::ostringstream&, char*)
overload as well, with its baffling mix of std::string and classic-C (e.g.
strlen(out.str().c_str()).
If we absolutely MUST use a big memory pool for performance reasons, let's
use StringVector with allocators.
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Instead of a single std::ostringstream instance shared by all callers, even
those on different threads, make each of the relevant lllog_test_() and
llcallstacks macros instantiate independent (stack) std::ostringstream
objects. lllog_test_() is called by LL_DEBUGS(), LLINFOS(), LL_WARNS(),
LL_ERRS(), LL_VLOGS() et al.
Eliminate LLError::Log::out(), whose sole function was to arbitrate use of
that shared std::ostringstream. Amusingly, if the lock couldn't be locked or
if messageStreamInUse was set, out() would allocate a new (heap!)
std::ostringstream anyway, which would then have to be freed by flush().
Make both LLError::Log::flush() overloads accept const std::ostringstream&.
Make LL_ENDL pass the local _out instance. This eliminates the need to check
whether the passed std::ostringstream* references the shared instance and
(if so) reset it or (if not) delete it.
Make LLError::LLCallStacks::insert() accept the local _out instance as non-
const std::ostream&, rather than acquiring and returning std::ostringstream*.
Make end() accept the local instance as const std::ostringstream&.
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Introduce Oz's LLERROR_CRASH macro analogous to the old LLError::crashAndLoop()
function. Change LL_ENDL macro so that, after calling flush(), if the CallSite
is for LEVEL_ERROR, we invoke LLERROR_CRASH right there.
Change the meaning of LLError::FatalFunction. It used to be responsible for
the actual crash (hence crashAndLoop()). Now, instead, its role is to disrupt
control flow in some other way if you DON'T want to crash: throw an exception,
or call exit() or some such. Any FatalFunction that returns normally will fall
into the new crash in LL_ENDL.
Accordingly, the new default FatalFunction is a no-op lambda. This eliminates
the need to test for empty (not set) FatalFunction in Log::flush().
Remove LLError::crashAndLoop() because the official LL_ERRS crash is now in
LL_ENDL.
One of the two common use cases for setFatalFunction() used to be to intercept
control in the last moments before crashing -- not to crash or to avoid
crashing, but to capture the LL_ERRS message in some way. Especially when
that's temporary, though (e.g. LLLeap), saving and restoring the previous
FatalFunction only works when the lifespans of the relevant objects are
strictly LIFO.
Either way, that's a misuse of FatalFunction. Fortunately the Recorder
mechanism exactly addresses that case. Introduce a GenericRecorder template
subclass, with LLError::addGenericRecorder(callable) that accepts a callable
with suitable (level, message) signature, instantiates a GenericRecorder, adds
it to the logging machinery and returns the RecorderPtr for possible later use
with removeRecorder().
Change llappviewer.cpp's errorCallback() to an addGenericRecorder() callable.
Its role was simply to update gDebugInfo["FatalMessage"] with the LL_ERRS
message, then call writeDebugInfo(), before calling crashAndLoop() to finish
crashing. Remove the crashAndLoop() call, retaining the gDebugInfo logic. Pass
errorCallback() to LLError::addGenericRecorder() instead of setFatalFunction().
Oddly, errorCallback()'s crashAndLoop() call was conditional on a compile-time
SHADER_CRASH_NONFATAL symbol. The new mechanism provides no way to support
SHADER_CRASH_NONFATAL -- it is a Bad Idea to return normally from any LL_ERRS
invocation!
Rename LLLeapImpl::fatalFunction() to onError(). Instead of passing it to
LLError::setFatalFunction(), pass it to addGenericRecorder(). Capture the
returned RecorderPtr in mRecorder, replacing mPrevFatalFunction. Then
~LLLeapImpl() calls removeRecorder(mRecorder) instead of restoring
mPrevFatalFunction (which, as noted above, was order-sensitive).
Of course, every enabled Recorder is called with every log message. onError()
and errorCallback() must specifically test for calls with LEVEL_ERROR.
LLSingletonBase::logerrs() used to call LLError::getFatalFunction(), check the
return and call it if non-empty, else call LLError::crashAndLoop(). Replace
all that with LLERROR_CRASH.
Remove from llappviewer.cpp the watchdog_llerrs_callback() and
watchdog_killer_callback() functions. watchdog_killer_callback(), passed to
Watchdog::init(), used to setFatalFunction(watchdog_llerrs_callback) and then
invoke LL_ERRS() -- which seems a bit roundabout. watchdog_llerrs_callback(),
in turn, replicated much of the logic in the primary errorCallback() function
before replicating the crash from llwatchdog.cpp's default_killer_callback().
Instead, pass LLWatchdog::init() a lambda that invokes the LL_ERRS() message
formerly found in watchdog_killer_callback(). It no longer needs to override
FatalFunction with watchdog_llerrs_callback() because errorCallback() will
still be called as a Recorder, obviating watchdog_llerrs_callback()'s first
half; and LL_ENDL will handle the crash, obviating the second half.
Remove from llappviewer.cpp the static fast_exit() function, which was simply
an alias for _exit() acceptable to boost::bind(). Use a lambda directly
calling _exit() instead of using boost::bind() at all.
In the CaptureLog class in llcommon/tests/wrapllerrs.h, instead of statically
referencing the wouldHaveCrashed() function from test.cpp, simply save and
restore the current FatalFunction across the LLError::saveAndResetSettings()
call.
llerror_test.cpp calls setFatalFunction(fatalCall), where fatalCall() was a
function that simply set a fatalWasCalled bool rather than actually crashing
in any way. Of course, that implementation would now lead to crashing the test
program. Make fatalCall() throw a new FatalWasCalled exception. Introduce a
CATCH(LL_ERRS("tag"), "message") macro that expands to:
LL_ERRS("tag") << "message" << LL_ENDL;
within a try/catch block that catches FatalWasCalled and sets the same bool.
Change all existing LL_ERRS() in llerror_test.cpp to corresponding CATCH()
calls. In fact there's also an LL_DEBUGS(bad tag) invocation that exercises an
LL_ERRS internal to llerror.cpp; wrap that too.
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DRTVWR-519"
This reverts commit e61f485a04dc8c8ac6bcf6a24848359092884d14, reversing
changes made to 00c47d079f7e958e473ed4083a7f7691fa02dcd5.
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LLSingleton depends onto logging system, having logging system be based on LLSingleton causes crashes and deadlocks
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branch. Cloned canonical viewer into DRTVWR-519, copied over the files that changed from DRTVWR-506-simple and pushed back. Once I am satisfied everything is correct, DRTVWR-506-simple will be removed
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(cherry picked from commit 0b61150e698537a7e42a4cdae02496da500399d9)
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On Mac, even if you run a test program with --debug or set LOGTEST=DEBUG, it
won't log to stderr if you're filtering build output or running the build in
an emacs compile buffer. This is because, on Mac, a viewer launched by mouse
rather than from the command line is passed a stderr stream that ultimately
gets logged to the system Console. The shouldLogToStderr() function is
intended to avoid spamming the Console with the (voluminous) viewer log
output. It tests whether stderr isatty() and, if not, suppresses calling
LLError::logToStderr().
This makes debugging test programs using log output trickier than necessary.
Change shouldLogToStderr() to permit logging when either stderr isatty() or is
a pipe. The original intention is preserved in that empirically, a viewer
launched by mouse is passed a stderr stream identified as a character device
rather than as a pipe.
Also introduce SetEnv, a class that facilitates setting (e.g.) LOGTEST=DEBUG
for specific test programs without setting it for all test programs in the
build. Using the constructor for a static object means you can set environment
variables before main() is entered, which is important because it's the main()
function in test.cpp that acts on the LOGTEST and LOGFAIL environment
variables.
These changes make it unnecessary to retain the temporary change in test.cpp
to force LOGTEST to DEBUG.
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LLStacktrace has no behavior except when you stream an instance to a
std::ostream. Then it reports the current traceback at that point to the
ostream.
This bit of indirection is intended to avoid the boost/stacktrace.hpp header
from being included everywhere.
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But leave LLTempRedirect available in the code base.
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LLSD::emptyMap() is a factory for an empty map instance, NOT a predicate on
any particular instance. In fact checking configuration.isUndefined() and
testing whether the map is empty are both subsumed by (! configuration).
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Make the LLError::Settings LLSingleton duplicate the file handle for stderr
(usually 2) on construction. Make its destructor restore the original target
for that file handle. Provide a getDupStderr() method to obtain the duplicate
file handle.
Move Settings declaration up to the top of the file so other code can
reference it.
Make RecordToFile (the Recorder subclass engaged by LLError::logToFile()),
instead of duplicating stderr's file handle itself, capture the duplicate
stderr file handle from Settings to revert stderr redirection on destruction.
Make RecordToStderr (the Recorder subclass engaged by LLError::logToStderr())
use fdopen() to create an LLFILE* targeting the duplicate file handle from
Settings. Write output to that instead of to stderr so logToStderr() continues
to provide output for the user instead of duplicating each line into the log
file.
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Some of the libraries we use produce log output to stderr. Such output can be
informative, but is invisible unless you launch the viewer from a console. In
particular, it's invisible to anyone trying to diagnose a problem by reading
someone else's SecondLife.log file.
Make RecordToFile -- the Recorder subclass engaged by LLError::logToFile() --
redirect STDERR_FILENO to the newly-opened log file so that any subsequent
writes to stderr (or cerr, for that matter) will be captured in the log file.
But first duplicate the original stderr file handle, and restore it when
RecordToFile is destroyed. That way, output written to stderr during the final
moments of application shutdown should still appear on (console) stderr.
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The comments within indra/test/test.cpp promise that --debug is, in fact, like
LOGTEST=DEBUG. Until now, that was a lie. LOGTEST=level displayed log output
on stderr as well as in testprogram.log, while --debug did not.
Add LLError::logToStderr() function, and make initForApplication() (i.e.
commonInit()) call that instead of instantiating RecordToStderr inline. Also
call it when test.cpp recognizes --debug switch.
Remove the mFileRecorder, mFixedBufferRecorder and mFileRecorderFileName
members from SettingsConfig. That tactic doesn't scale.
Instead, add findRecorder<RECORDER>() and removeRecorder<RECORDER>() template
functions to locate (or remove) a RecorderPtr to an object of the specified
subclass. Both are based on an underlying findRecorderPos<RECORDER>() template
function. Since we never expect to manage more than a handful of RecorderPtrs,
and since access to the deleted members is very much application setup rather
than any kind of ongoing access, a search loop suffices.
logToFile() uses removeRecorder<RecordToFile>() rather than removing
mFileRecorder (the only use of mFileRecorder).
logToFixedBuffer() uses removeRecorder<RecordToFixedBuffer>() rather than
removing mFixedBufferRecorder (the only use of mFixedBufferRecorder).
Make RecordToFile store the filename with which it was instantiated. Add a
getFilename() method to retrieve it. logFileName() is now based on
findRecorder<RecordToFile>() instead of mFileRecorderFileName (the only use of
mFileRecorderFileName).
Make RecordToStderr::mUseANSI a simple bool rather than a three-state enum,
and set it immediately on construction. Apparently the reason it was set
lazily was because it consults its own checkANSI() method, and of course
'this' doesn't acquire the leaf class type until the constructor has completed
successfully. But since nothing in checkANSI() depends on anything else in
RecordToStderr, making it static solves that problem.
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LLError::shouldLogToStderr() behavior under xcode.
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Use function-static LLMutex instances instead of module-static instances,
since some log calls are evidently issued before we get around to initializing
llerror.cpp module-static variables.
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The Windows implementation of demangle() assumed that a "mangled" class name
produced by typeid(class).name() always starts with the prefix "class ",
checked for that and removed it. If the mangled name didn't start with that
prefix, it would emit a debug message and return the full name.
When the class in question is actually a struct, the prefix is "struct "
instead. But when demangle() was being called before logging had been fully
initialized, the debug message remarking that it didn't start with "class "
crashed.
Look for either "class " or "struct " prefix. Remove whichever is found and
return the rest of the name. If neither is found, only log if logging is
available.
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eliminate branches from high-traffic code.
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breaks
Improve the implementation so that escaping is computed only once
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MAINT-8991: only escape log message characters once, add unit test
remove extra log line created by LL_ERRS
document that tags may not contain spaces
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if it is used at all
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can be useful for performance reasons when especially verbose debug logging is needed.
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DebugAnimatedObjects output
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Silence nagging about running launcher for non-release for download builds.
Tweak newview CMake to use executable instead of SL_Launcher and
re-enable debugging within Xcode.
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OS X 10.14 Mojave
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The logging subsystem depends on two different LLSingletons for some reason.
It turns out to be very difficult to completely avoid executing any logging
calls after the LLSingletonBase::deleteAll(), but we really don't want to
resurrect those LLSingletons so late in the run for a couple stragglers.
Introduce LLSingleton::wasDeleted() query method, and use it in logging
subsystem to simply bypass last-millisecond logging requests.
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