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clang-p2996/lldb/source/lldb-log.cpp
Greg Clayton 2d4edfbc6a Modified all logging calls to hand out shared pointers to make sure we 
don't crash if we disable logging when some code already has a copy of the
logger. Prior to this fix, logs were handed out as pointers and if they were
held onto while a log got disabled, then it could cause a crash. Now all logs
are handed out as shared pointers so this problem shouldn't happen anymore.
We are also using our new shared pointers that put the shared pointer count
and the object into the same allocation for a tad better performance.

llvm-svn: 118319
2010-11-06 01:53:30 +00:00

235 lines
8.5 KiB
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//===-- lldb-log.cpp --------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/lldb-private-log.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Interpreter/Args.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/StreamFile.h"
#include <string.h>
using namespace lldb;
using namespace lldb_private;
// We want to avoid global constructors where code needs to be run so here we
// control access to our static g_log_sp by hiding it in a singleton function
// that will construct the static g_lob_sp the first time this function is
// called.
static LogSP &
GetLog ()
{
static LogSP g_log_sp;
return g_log_sp;
}
uint32_t
lldb_private::GetLogMask ()
{
LogSP log(GetLog ());
if (log)
return log->GetMask().Get();
return 0;
}
bool
lldb_private::IsLogVerbose ()
{
uint32_t mask = GetLogMask();
return (mask & LIBLLDB_LOG_VERBOSE);
}
LogSP
lldb_private::GetLogIfAllCategoriesSet (uint32_t mask)
{
LogSP log(GetLog ());
if (log && mask)
{
uint32_t log_mask = log->GetMask().Get();
if ((log_mask & mask) != mask)
return LogSP();
}
return log;
}
void
lldb_private::LogIfAllCategoriesSet (uint32_t mask, const char *format, ...)
{
LogSP log(GetLogIfAllCategoriesSet (mask));
if (log)
{
va_list args;
va_start (args, format);
log->VAPrintf (format, args);
va_end (args);
}
}
void
lldb_private::LogIfAnyCategoriesSet (uint32_t mask, const char *format, ...)
{
LogSP log(GetLogIfAnyCategoriesSet (mask));
if (log)
{
va_list args;
va_start (args, format);
log->VAPrintf (format, args);
va_end (args);
}
}
LogSP
lldb_private::GetLogIfAnyCategoriesSet (uint32_t mask)
{
LogSP log(GetLog ());
if (log && mask && (mask & log->GetMask().Get()))
return log;
return LogSP();
}
void
lldb_private::DisableLog (Args &args, Stream *feedback_strm)
{
LogSP log(GetLog ());
uint32_t flag_bits;
if (log)
{
flag_bits = log->GetMask().Get();
const size_t argc = args.GetArgumentCount ();
for (size_t i = 0; i < argc; ++i)
{
const char *arg = args.GetArgumentAtIndex (i);
if (strcasecmp(arg, "all") == 0 ) flag_bits &= ~LIBLLDB_LOG_ALL;
else if (strcasecmp(arg, "api") == 0) flag_bits &= ~LIBLLDB_LOG_API;
else if (strcasestr(arg, "break") == arg) flag_bits &= ~LIBLLDB_LOG_BREAKPOINTS;
else if (strcasecmp(arg, "default") == 0 ) flag_bits &= ~LIBLLDB_LOG_DEFAULT;
else if (strcasecmp(arg, "dyld") == 0 ) flag_bits &= ~LIBLLDB_LOG_DYNAMIC_LOADER;
else if (strcasestr(arg, "event") == arg) flag_bits &= ~LIBLLDB_LOG_EVENTS;
else if (strcasestr(arg, "expr") == arg) flag_bits &= ~LIBLLDB_LOG_EXPRESSIONS;
else if (strcasestr(arg, "object") == arg) flag_bits &= ~LIBLLDB_LOG_OBJECT;
else if (strcasecmp(arg, "process") == 0 ) flag_bits &= ~LIBLLDB_LOG_PROCESS;
else if (strcasecmp(arg, "state") == 0 ) flag_bits &= ~LIBLLDB_LOG_STATE;
else if (strcasecmp(arg, "step") == 0 ) flag_bits &= ~LIBLLDB_LOG_STEP;
else if (strcasecmp(arg, "thread") == 0 ) flag_bits &= ~LIBLLDB_LOG_THREAD;
else if (strcasecmp(arg, "verbose") == 0 ) flag_bits &= ~LIBLLDB_LOG_VERBOSE;
else if (strcasestr(arg, "watch") == arg) flag_bits &= ~LIBLLDB_LOG_WATCHPOINTS;
else if (strcasestr(arg, "temp") == arg) flag_bits &= ~LIBLLDB_LOG_TEMPORARY;
else if (strcasestr(arg, "comm") == arg) flag_bits &= ~LIBLLDB_LOG_COMMUNICATION;
else if (strcasestr(arg, "conn") == arg) flag_bits &= ~LIBLLDB_LOG_CONNECTION;
else if (strcasestr(arg, "host") == arg) flag_bits &= ~LIBLLDB_LOG_HOST;
else if (strcasestr(arg, "unwind") == arg) flag_bits &= ~LIBLLDB_LOG_UNWIND;
else
{
feedback_strm->Printf ("error: unrecognized log category '%s'\n", arg);
ListLogCategories (feedback_strm);
return;
}
}
if (flag_bits == 0)
GetLog ().reset();
else
log->GetMask().Reset (flag_bits);
}
return;
}
LogSP
lldb_private::EnableLog (StreamSP &log_stream_sp, uint32_t log_options, Args &args, Stream *feedback_strm)
{
// Try see if there already is a log - that way we can reuse its settings.
// We could reuse the log in toto, but we don't know that the stream is the same.
uint32_t flag_bits;
LogSP log(GetLog ());
if (log)
flag_bits = log->GetMask().Get();
else
flag_bits = 0;
// Now make a new log with this stream if one was provided
if (log_stream_sp)
{
log = make_shared<Log>(log_stream_sp);
GetLog () = log;
}
if (log)
{
bool got_unknown_category = false;
const size_t argc = args.GetArgumentCount();
for (size_t i=0; i<argc; ++i)
{
const char *arg = args.GetArgumentAtIndex(i);
if (strcasecmp(arg, "all") == 0 ) flag_bits |= LIBLLDB_LOG_ALL;
else if (strcasecmp(arg, "api") == 0) flag_bits |= LIBLLDB_LOG_API;
else if (strcasestr(arg, "break") == arg) flag_bits |= LIBLLDB_LOG_BREAKPOINTS;
else if (strcasecmp(arg, "default") == 0 ) flag_bits |= LIBLLDB_LOG_DEFAULT;
else if (strcasecmp(arg, "dyld") == 0 ) flag_bits |= LIBLLDB_LOG_DYNAMIC_LOADER;
else if (strcasestr(arg, "event") == arg) flag_bits |= LIBLLDB_LOG_EVENTS;
else if (strcasestr(arg, "expr") == arg) flag_bits |= LIBLLDB_LOG_EXPRESSIONS;
else if (strcasestr(arg, "object") == arg) flag_bits |= LIBLLDB_LOG_OBJECT;
else if (strcasecmp(arg, "process") == 0 ) flag_bits |= LIBLLDB_LOG_PROCESS;
else if (strcasecmp(arg, "state") == 0 ) flag_bits |= LIBLLDB_LOG_STATE;
else if (strcasecmp(arg, "step") == 0 ) flag_bits |= LIBLLDB_LOG_STEP;
else if (strcasecmp(arg, "thread") == 0 ) flag_bits |= LIBLLDB_LOG_THREAD;
else if (strcasecmp(arg, "verbose") == 0 ) flag_bits |= LIBLLDB_LOG_VERBOSE;
else if (strcasestr(arg, "watch") == arg) flag_bits |= LIBLLDB_LOG_WATCHPOINTS;
else if (strcasestr(arg, "temp") == arg) flag_bits |= LIBLLDB_LOG_TEMPORARY;
else if (strcasestr(arg, "comm") == arg) flag_bits |= LIBLLDB_LOG_COMMUNICATION;
else if (strcasestr(arg, "conn") == arg) flag_bits |= LIBLLDB_LOG_CONNECTION;
else if (strcasestr(arg, "host") == arg) flag_bits |= LIBLLDB_LOG_HOST;
else if (strcasestr(arg, "unwind") == arg) flag_bits |= LIBLLDB_LOG_UNWIND;
else
{
feedback_strm->Printf("error: unrecognized log category '%s'\n", arg);
if (got_unknown_category == false)
{
got_unknown_category = true;
ListLogCategories (feedback_strm);
return log;
}
}
}
log->GetMask().Reset(flag_bits);
log->GetOptions().Reset(log_options);
}
return log;
}
void
lldb_private::ListLogCategories (Stream *strm)
{
strm->Printf("Logging categories for 'lldb':\n"
"\tall - turn on all available logging categories\n"
"\tapi - enable logging of API calls and return values\n"
"\tdefault - enable the default set of logging categories for liblldb\n"
"\tbreak - log breakpoints\n"
"\tevents - log broadcaster, listener and event queue activities\n"
"\texpr - log expressions\n"
"\tobject - log object construction/destruction for important objects\n"
"\tprocess - log process events and activities\n"
"\tthread - log thread events and activities\n"
"\tshlib - log shared library related activities\n"
"\tstate - log private and public process state changes\n"
"\tstep - log step related activities\n"
"\tunwind - log stack unwind activities\n"
"\tverbose - enable verbose loggging\n"
"\twatch - log watchpoint related activities\n");
}
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