1  /* Copyright (C) 1996-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  /* This file specifies the format of gmon.out files.  It should have
      19     as few external dependencies as possible as it is going to be included
      20     in many different programs.  That is, minimize the number of #include's.
      21  
      22     A gmon.out file consists of a header (defined by gmon_hdr) followed by
      23     a sequence of records.  Each record starts with a one-byte tag
      24     identifying the type of records, followed by records specific data. */
      25  
      26  #ifndef _SYS_GMON_OUT_H
      27  #define _SYS_GMON_OUT_H	1
      28  
      29  #include <features.h>
      30  
      31  #define	GMON_MAGIC	"gmon"	/* magic cookie */
      32  #define GMON_VERSION	1	/* version number */
      33  
      34  /* For profiling shared object we need a new format.  */
      35  #define GMON_SHOBJ_VERSION	0x1ffff
      36  
      37  __BEGIN_DECLS
      38  
      39  /*
      40   * Raw header as it appears on file (without padding).  This header
      41   * always comes first in gmon.out and is then followed by a series
      42   * records defined below.
      43   */
      44  struct gmon_hdr
      45    {
      46      char cookie[4];
      47      char version[4];
      48      char spare[3 * 4];
      49    };
      50  
      51  /* types of records in this file: */
      52  typedef enum
      53    {
      54      GMON_TAG_TIME_HIST = 0,
      55      GMON_TAG_CG_ARC = 1,
      56      GMON_TAG_BB_COUNT = 2
      57    } GMON_Record_Tag;
      58  
      59  struct gmon_hist_hdr
      60    {
      61      char low_pc[sizeof (char *)];	/* base pc address of sample buffer */
      62      char high_pc[sizeof (char *)];	/* max pc address of sampled buffer */
      63      char hist_size[4];			/* size of sample buffer */
      64      char prof_rate[4];			/* profiling clock rate */
      65      char dimen[15];			/* phys. dim., usually "seconds" */
      66      char dimen_abbrev;			/* usually 's' for "seconds" */
      67    };
      68  
      69  struct gmon_cg_arc_record
      70    {
      71      char from_pc[sizeof (char *)];	/* address within caller's body */
      72      char self_pc[sizeof (char *)];	/* address within callee's body */
      73      char count[4];			/* number of arc traversals */
      74    };
      75  
      76  __END_DECLS
      77  
      78  #endif /* sys/gmon_out.h */