Temporary additional logging to investigate bug

The bug appears related to continuing to use an invalid buffer provider
in fast mixer after track destruction, so focus the added logs in that area.

Also includes a bug fix: was calling log in an unsafe place
near Threads.cpp AudioFlinger::PlaybackThread::createTrack_l line 1250.

Details:
 - include caller pid or client pid where appropriate
 - increase log buffer size
 - log mFastIndex when AudioMixer sees an invalid bufferProvider.
 - log both potentially modified and actually modified tracks in FastMixer.
 - fix benign bug where sq->end() was called more than once.
 - log StateQueue push() call and return.
 - increase StateQueue size from 4 to 8 entries
 - log mixer->enable(), bufferProvider, and currentTrackMask
 - log buffer provider addresses
 - increase fast mixer log buffer again
 - check logf format vs. argument list compatibility
 - add logging to AudioMixer
 - add checking of magic field in AudioMixer to detect overwrites
 - add bool AudioMixer::enabled()
 - increase log buffer sizes yet again
 - enable assertion checking without ALOGV
 - improve a few log messages
 - check for corruption in more places
 - log in all the process hooks
 - add new mixer APIs so we can check for corruption of mixer state
 - fix a build warning

Bug: 6490974
Change-Id: Ib0c4a73dcf606ef9bd898313b3b40ef61ab42f51

1 files changed, 2 insertions, 2 deletions

diff --git a/include/media/nbaio/NBLog.h b/include/media/nbaio/NBLog.h
index 8fc417f..107ba66 100644
--- a/include/media/nbaio/NBLog.h
+++ b/include/media/nbaio/NBLog.h
@@ -115,7 +115,7 @@ public:
     virtual ~Writer() { }
 
     virtual void    log(const char *string);
-    virtual void    logf(const char *fmt, ...);
+    virtual void    logf(const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
     virtual void    logvf(const char *fmt, va_list ap);
     virtual void    logTimestamp();
     virtual void    logTimestamp(const struct timespec& ts);
@@ -149,7 +149,7 @@ public:
     LockedWriter(size_t size, void *shared);
 
     virtual void    log(const char *string);
-    virtual void    logf(const char *fmt, ...);
+    virtual void    logf(const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
     virtual void    logvf(const char *fmt, va_list ap);
     virtual void    logTimestamp();
     virtual void    logTimestamp(const struct timespec& ts);