SH-2218 WORK AROUND -- v2.8.x Viewers crash consistently when I actively use other applications

* Just removed mac memory stats to make a low-risk work-around.

indra/llcommon/llsys.cpp

@@ -1003,184 +1003,6 @@ LLSD LLMemoryInfo::loadStatsMap()
 		LL_WARNS("LLMemoryInfo") << "Unable to collect hw.memsize memory information" << LL_ENDL;
 	}
 
-	FILE* pout = popen("vm_stat 2>&1", "r");
-	if (! pout)                     // popen() couldn't run vm_stat
-	{
-		// Save errno right away.
-		int popen_errno(errno);
-		LL_WARNS("LLMemoryInfo") << "Unable to collect vm_stat memory information: ";
-		char buffer[256];
-		if (0 == strerror_r(popen_errno, buffer, sizeof(buffer)))
-		{
-			LL_CONT << buffer;
-		}
-		else
-		{
-			LL_CONT << "errno " << popen_errno;
-		}
-		LL_CONT << LL_ENDL;
-	}
-	else                            // popen() launched vm_stat
-	{
-		// Mach Virtual Memory Statistics: (page size of 4096 bytes)
-		// Pages free:					 462078.
-		// Pages active:				 142010.
-		// Pages inactive:				 220007.
-		// Pages wired down:			 159552.
-		// "Translation faults":	  220825184.
-		// Pages copy-on-write:			2104153.
-		// Pages zero filled:		  167034876.
-		// Pages reactivated:			  65153.
-		// Pageins:						2097212.
-		// Pageouts:					  41759.
-		// Object cache: 841598 hits of 7629869 lookups (11% hit rate)
-
-		// Intentionally don't pass the boost::no_except flag. These
-		// boost::regex objects are constructed with string literals, so they
-		// should be valid every time. If they become invalid, we WANT an
-		// exception, hopefully even before the dev checks in.
-		boost::regex pagesize_rx("\\(page size of ([0-9]+) bytes\\)");
-		boost::regex stat_rx("(.+): +([0-9]+)\\.");
-		boost::regex cache_rx("Object cache: ([0-9]+) hits of ([0-9]+) lookups "
-							  "\\(([0-9]+)% hit rate\\)");
-		boost::cmatch matched;
-		LLSD::Integer pagesizekb(4096/1024);
-
-		// Here 'pout' is vm_stat's stdout. Search it for relevant data.
-		char line[100];
-		line[sizeof(line)-1] = '\0';
-		while (fgets(line, sizeof(line)-1, pout))
-		{
-			size_t linelen(strlen(line));
-			// Truncate any trailing newline
-			if (line[linelen - 1] == '\n')
-			{
-				line[--linelen] = '\0';
-			}
-			LL_DEBUGS("LLMemoryInfo") << line << LL_ENDL;
-			if (regex_search_no_exc(line, matched, pagesize_rx))
-			{
-				// "Mach Virtual Memory Statistics: (page size of 4096 bytes)"
-				std::string pagesize_str(matched[1].first, matched[1].second);
-				try
-				{
-					// Reasonable to assume that pagesize will always be a
-					// multiple of 1Kb?
-					pagesizekb = boost::lexical_cast<LLSD::Integer>(pagesize_str)/1024;
-				}
-				catch (const boost::bad_lexical_cast&)
-				{
-					LL_WARNS("LLMemoryInfo") << "couldn't parse '" << pagesize_str
-											 << "' in vm_stat line: " << line << LL_ENDL;
-					continue;
-				}
-				stats.add("page size", pagesizekb);
-			}
-			else if (regex_match_no_exc(line, matched, stat_rx))
-			{
-				// e.g. "Pages free:					 462078."
-				// Strip double-quotes off certain statistic names
-				const char *key_begin(matched[1].first), *key_end(matched[1].second);
-				if (key_begin[0] == '"' && key_end[-1] == '"')
-				{
-					++key_begin;
-					--key_end;
-				}
-				LLSD::String key(key_begin, key_end);
-				LLSD::String value_str(matched[2].first, matched[2].second);
-				LLSD::Integer value(0);
-				try
-				{
-					value = boost::lexical_cast<LLSD::Integer>(value_str);
-				}
-				catch (const boost::bad_lexical_cast&)
-				{
-					LL_WARNS("LLMemoryInfo") << "couldn't parse '" << value_str
-											 << "' in vm_stat line: " << line << LL_ENDL;
-					continue;
-				}
-				// Store this statistic.
-				stats.add(key, value);
-				// Is this in units of pages? If so, convert to Kb.
-				static const LLSD::String pages("Pages ");
-				if (key.substr(0, pages.length()) == pages)
-				{
-					// Synthesize a new key with kb in place of Pages
-					LLSD::String kbkey("kb ");
-					kbkey.append(key.substr(pages.length()));
-					stats.add(kbkey, value * pagesizekb);
-				}
-			}
-			else if (regex_match_no_exc(line, matched, cache_rx))
-			{
-				// e.g. "Object cache: 841598 hits of 7629869 lookups (11% hit rate)"
-				static const char* cache_keys[] = { "cache hits", "cache lookups", "cache hit%" };
-				std::vector<LLSD::Integer> cache_values;
-				for (size_t i = 0; i < (sizeof(cache_keys)/sizeof(cache_keys[0])); ++i)
-				{
-					LLSD::String value_str(matched[i+1].first, matched[i+1].second);
-					LLSD::Integer value(0);
-					try
-					{
-						value = boost::lexical_cast<LLSD::Integer>(value_str);
-					}
-					catch (boost::bad_lexical_cast&)
-					{
-						LL_WARNS("LLMemoryInfo") << "couldn't parse '" << value_str
-												 << "' in vm_stat line: " << line << LL_ENDL;
-						continue;
-					}
-					stats.add(cache_keys[i], value);
-				}
-			}
-			else
-			{
-				LL_WARNS("LLMemoryInfo") << "unrecognized vm_stat line: " << line << LL_ENDL;
-			}
-		}
-		int status(pclose(pout));
-		if (status == -1)           // pclose() couldn't retrieve rc
-		{
-			// Save errno right away.
-			int pclose_errno(errno);
-			// The ECHILD error happens so frequently that unless filtered,
-			// the warning below spams the log file. This is too bad, because
-			// sometimes the logic above fails to produce any output derived
-			// from vm_stat, but we've been unable to observe any specific
-			// error indicating the problem.
-			if (pclose_errno != ECHILD)
-			{
-				LL_WARNS("LLMemoryInfo") << "Unable to obtain vm_stat termination code: ";
-				char buffer[256];
-				if (0 == strerror_r(pclose_errno, buffer, sizeof(buffer)))
-				{
-					LL_CONT << buffer;
-				}
-				else
-				{
-					LL_CONT << "errno " << pclose_errno;
-				}
-				LL_CONT << LL_ENDL;
-			}
-		}
-		else                        // pclose() retrieved rc; analyze
-		{
-			if (WIFEXITED(status))
-			{
-				int rc(WEXITSTATUS(status));
-				if (rc != 0)
-				{
-					LL_WARNS("LLMemoryInfo") << "vm_stat terminated with rc " << rc << LL_ENDL;
-				}
-			}
-			else if (WIFSIGNALED(status))
-			{
-				LL_WARNS("LLMemoryInfo") << "vm_stat terminated by signal " << WTERMSIG(status)
-										 << LL_ENDL;
-			}
-		}
-	}
-
 #elif LL_SOLARIS
 	U64 phys = 0;