148 lines
5.6 KiB
C++
148 lines
5.6 KiB
C++
/* sys/strace.h
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2008,
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2010, 2011, 2012 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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/* This file contains routines for tracing system calls and other internal
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phenomenon.
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When tracing system calls, try to use the same style throughout:
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result = syscall (arg1, arg2, arg3) [optional extra stuff]
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If a system call can block (eg: read, write, wait), print another message
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before hanging so the user will know why the program has stopped.
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Note: __seterrno will also print a trace message. Have that printed
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*first*. This will make it easy to always know what __seterrno is
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refering to. For the same reason, try not to have __seterrno messages
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printed alone.
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*/
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#ifndef _SYS_STRACE_H
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#define _SYS_STRACE_H
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#include <stdarg.h>
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#include <sys/types.h>
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#ifdef __cplusplus
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class child_info;
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class strace
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{
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int vsprntf (char *buf, const char *func, const char *infmt, va_list ap);
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void write (unsigned category, const char *buf, int count);
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unsigned char _active;
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public:
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void activate (bool) __attribute__ ((regparm (2)));;
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strace () {}
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int microseconds ();
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int version;
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int lmicrosec;
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bool execing;
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void dll_info () __attribute__ ((regparm (1)));
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void prntf (unsigned, const char *func, const char *, ...) /*__attribute__ ((regparm(3)))*/;
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void vprntf (unsigned, const char *func, const char *, va_list ap) /*__attribute__ ((regparm(3)))*/;
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void wm (int message, int word, int lon) __attribute__ ((regparm(3)));
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void write_childpid (pid_t) __attribute__ ((regparm (3)));
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bool attached () const {return _active == 3;}
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bool active () const {return _active & 1;}
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unsigned char& active_val () {return _active;}
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};
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extern strace strace;
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#endif /* __cplusplus */
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#define _STRACE_INTERFACE_ACTIVATE_ADDR -1
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#define _STRACE_INTERFACE_ACTIVATE_ADDR1 -2
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#define _STRACE_CHILD_PID -3
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/* Bitmasks of tracing messages to print. */
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#define _STRACE_ALL 0x000001 // so behaviour of strace=1 is unchanged
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#define _STRACE_FLUSH 0x000002 // flush output buffer after every message
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#define _STRACE_INHERIT 0x000004 // children inherit mask from parent
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#define _STRACE_UHOH 0x000008 // unusual or weird phenomenon
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#define _STRACE_SYSCALL 0x000010 // system calls
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#define _STRACE_STARTUP 0x000020 // argc/envp printout at startup
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#define _STRACE_DEBUG 0x000040 // info to help debugging
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#define _STRACE_PARANOID 0x000080 // paranoid info
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#define _STRACE_TERMIOS 0x000100 // info for debugging termios stuff
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#define _STRACE_SELECT 0x000200 // info on ugly select internals
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#define _STRACE_WM 0x000400 // trace windows messages (enable _strace_wm)
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#define _STRACE_SIGP 0x000800 // trace signal and process handling
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#define _STRACE_MINIMAL 0x001000 // very minimal strace output
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#define _STRACE_PTHREAD 0x002000 // pthread calls
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#define _STRACE_EXITDUMP 0x004000 // dump strace cache on exit
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#define _STRACE_SYSTEM 0x008000 // cache strace messages
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#define _STRACE_NOMUTEX 0x010000 // don't use mutex for synchronization
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#define _STRACE_MALLOC 0x020000 // trace malloc calls
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#define _STRACE_THREAD 0x040000 // cygthread calls
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#define _STRACE_NOTALL 0x080000 // don't include if _STRACE_ALL
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#define _STRACE_SPECIAL 0x100000 // special case, only for debugging - do not check in
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#ifdef __cplusplus
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extern "C" {
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#endif
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void small_printf (const char *, ...);
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void strace_printf (unsigned, const char *func, const char *, ...);
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#ifdef __cplusplus
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}
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#endif
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#ifdef __cplusplus
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#ifdef NOSTRACE
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#define strace_printf_wrap(what, fmt, args...)
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#define strace_printf_wrap1(what, fmt, args...)
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#else
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#define strace_printf_wrap(what, fmt, args...) \
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((void) ({\
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if ((_STRACE_ ## what & _STRACE_SYSTEM) || strace.active ()) \
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strace.prntf(_STRACE_ ## what, __PRETTY_FUNCTION__, fmt, ## args); \
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0; \
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}))
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#define strace_printf_wrap1(what, fmt, args...) \
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((void) ({\
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if ((_STRACE_ ## what & _STRACE_SYSTEM) || strace.active ()) \
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strace.prntf((_STRACE_ ## what) | _STRACE_NOTALL, __PRETTY_FUNCTION__, fmt, ## args); \
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0; \
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}))
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#define strace_vprintf(what, fmt, arg) \
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((void) ({\
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if ((_STRACE_ ## what & _STRACE_SYSTEM) || strace.active ()) \
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strace.vprntf((_STRACE_ ## what), __PRETTY_FUNCTION__, fmt, arg); \
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0; \
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}))
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#endif /*NOSTRACE*/
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#ifdef DEBUGGING
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#define debug_only_printf(fmt, args...) debug_printf (fmt , ## args)
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#else
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#define debug_only_printf(fmt, args...) do {} while (0)
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#endif
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#define debug_printf(fmt, args...) strace_printf_wrap(DEBUG, fmt , ## args)
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#define malloc_printf(fmt, args...) strace_printf_wrap1(MALLOC, fmt , ## args)
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#define minimal_printf(fmt, args...) strace_printf_wrap1(MINIMAL, fmt , ## args)
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#define paranoid_printf(fmt, args...) strace_printf_wrap1(PARANOID, fmt , ## args)
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#define pthread_printf(fmt, args...) strace_printf_wrap1(PTHREAD, fmt , ## args)
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#define select_printf(fmt, args...) strace_printf_wrap(SELECT, fmt , ## args)
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#define sigproc_printf(fmt, args...) strace_printf_wrap(SIGP, fmt , ## args)
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#define syscall_printf(fmt, args...) strace_printf_wrap(SYSCALL, fmt , ## args)
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#define system_printf(fmt, args...) strace_printf_wrap(SYSTEM, fmt , ## args)
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#define termios_printf(fmt, args...) strace_printf_wrap(TERMIOS, fmt , ## args)
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#define thread_printf(fmt, args...) strace_printf_wrap1(THREAD, fmt , ## args)
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#define special_printf(fmt, args...) strace_printf_wrap1(SPECIAL, fmt , ## args)
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#define wm_printf(fmt, args...) strace_printf_wrap(WM, fmt , ## args)
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#endif /* __cplusplus */
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#endif /* _SYS_STRACE_H */
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