/*	debug.h - helpful debug routines 	Copyright (C) 2010, IBM Corporation,  		Eric Van Hensbergen (bergevan@us.ibm.com) */ static ulong vflag = 0;static int debugfd = 2; #define DERR 0x00000	/* error -- always print the error */#define DCUR 0x00001	/* current - temporary trace */#define DPIP 0x00002	/* interactions with multipipes */#define DGAN 0x00004	/* gang tracking */#define DEXE 0x00008	/* execfs interactions */#define DBCA 0x00010	/* broadcast operations */#define DCLN 0x00020	/* cleanup tracking */#define DFID 0x00040	/* fid tracking */#define DREF 0x00080	/* ref count tracking */#define DARG 0x00100	/* arguments */#define DSTS 0x00200	/* status */#define DNET 0x00400	/* remote access */#define DRDR 0x00800	/* reader */#define DOPS 0x01000	/* operation tracking */#define DWRT 0x02000	/* writer */#define DHDR 0x04000	/* packet headers */#define DSPF 0x08000	/* splice from */#define DSPT 0x10000	/* splice to */#define DEXC 0x20000	/* debug execcmd */#define DCLK 0x40000	/* clunks */ static voidDPRINT(ulong dcmd, char *fmt, ...){	va_list args;	char *p;	int len;	char s[255];	char *newfmt; 	if(dcmd!=DERR && !(vflag&dcmd))		return; 	p = strchr(fmt, '\n'); 	newfmt = smprint("\t[%8.8llud][%8.8d](0x%lx)\t %s\n", nsec()>>16, getpid(), vflag&dcmd, fmt);	if(p != nil){		p = strchr(newfmt, '\n');		*p = ' ';	}	va_start(args, fmt);	len = vsnprint(s, sizeof s - 1, newfmt, args);	va_end(args);	if (newfmt != nil) free(newfmt);	s[len]=0;	 	fprint(debugfd, "%s", s);}