899 lines
24 KiB
C
899 lines
24 KiB
C
/* Routines required for instrumenting a program. */
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/* Compile this one with gcc. */
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/* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "tconfig.h"
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#include "tsystem.h"
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#include "coretypes.h"
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#include "tm.h"
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#if defined(inhibit_libc)
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#define IN_LIBGCOV (-1)
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#else
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#undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
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#include <stdio.h>
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#define IN_LIBGCOV 1
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#if defined(L_gcov)
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#define GCOV_LINKAGE /* nothing */
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#endif
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#endif
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#include "gcov-io.h"
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#if defined(inhibit_libc)
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/* If libc and its header files are not available, provide dummy functions. */
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#ifdef L_gcov
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void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {}
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void __gcov_flush (void) {}
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#endif
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#ifdef L_gcov_merge_add
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void __gcov_merge_add (gcov_type *counters __attribute__ ((unused)),
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unsigned n_counters __attribute__ ((unused))) {}
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#endif
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#ifdef L_gcov_merge_single
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void __gcov_merge_single (gcov_type *counters __attribute__ ((unused)),
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unsigned n_counters __attribute__ ((unused))) {}
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#endif
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#ifdef L_gcov_merge_delta
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void __gcov_merge_delta (gcov_type *counters __attribute__ ((unused)),
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unsigned n_counters __attribute__ ((unused))) {}
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#endif
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#else
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#include <string.h>
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#if GCOV_LOCKED
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/stat.h>
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#endif
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#ifdef L_gcov
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#include "gcov-io.c"
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/* Chain of per-object gcov structures. */
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static struct gcov_info *gcov_list;
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/* A program checksum allows us to distinguish program data for an
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object file included in multiple programs. */
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static gcov_unsigned_t gcov_crc32;
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/* Size of the longest file name. */
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static size_t gcov_max_filename = 0;
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#ifdef TARGET_POSIX_IO
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/* Make sure path component of the given FILENAME exists, create
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missing directories. FILENAME must be writable.
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Returns zero on success, or -1 if an error occurred. */
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static int
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create_file_directory (char *filename)
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{
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char *s;
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for (s = filename + 1; *s != '\0'; s++)
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if (IS_DIR_SEPARATOR(*s))
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{
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char sep = *s;
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*s = '\0';
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/* Try to make directory if it doesn't already exist. */
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if (access (filename, F_OK) == -1
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&& mkdir (filename, 0755) == -1
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/* The directory might have been made by another process. */
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&& errno != EEXIST)
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{
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fprintf (stderr, "profiling:%s:Cannot create directory\n",
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filename);
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*s = sep;
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return -1;
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};
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*s = sep;
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};
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return 0;
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}
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#endif
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/* Check if VERSION of the info block PTR matches libgcov one.
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Return 1 on success, or zero in case of versions mismatch.
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If FILENAME is not NULL, its value used for reporting purposes
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instead of value from the info block. */
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static int
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gcov_version (struct gcov_info *ptr, gcov_unsigned_t version,
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const char *filename)
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{
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if (version != GCOV_VERSION)
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{
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char v[4], e[4];
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GCOV_UNSIGNED2STRING (v, version);
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GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
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fprintf (stderr,
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"profiling:%s:Version mismatch - expected %.4s got %.4s\n",
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filename? filename : ptr->filename, e, v);
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return 0;
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}
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return 1;
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}
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/* Dump the coverage counts. We merge with existing counts when
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possible, to avoid growing the .da files ad infinitum. We use this
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program's checksum to make sure we only accumulate whole program
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statistics to the correct summary. An object file might be embedded
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in two separate programs, and we must keep the two program
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summaries separate. */
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static void
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gcov_exit (void)
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{
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struct gcov_info *gi_ptr;
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struct gcov_summary this_program;
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struct gcov_summary all;
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struct gcov_ctr_summary *cs_ptr;
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const struct gcov_ctr_info *ci_ptr;
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unsigned t_ix;
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gcov_unsigned_t c_num;
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const char *gcov_prefix;
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int gcov_prefix_strip = 0;
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size_t prefix_length;
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char *gi_filename, *gi_filename_up;
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memset (&all, 0, sizeof (all));
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/* Find the totals for this execution. */
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memset (&this_program, 0, sizeof (this_program));
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for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
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{
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ci_ptr = gi_ptr->counts;
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for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
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{
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if (!((1 << t_ix) & gi_ptr->ctr_mask))
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continue;
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cs_ptr = &this_program.ctrs[t_ix];
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cs_ptr->num += ci_ptr->num;
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for (c_num = 0; c_num < ci_ptr->num; c_num++)
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{
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cs_ptr->sum_all += ci_ptr->values[c_num];
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if (cs_ptr->run_max < ci_ptr->values[c_num])
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cs_ptr->run_max = ci_ptr->values[c_num];
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}
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ci_ptr++;
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}
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}
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/* Get file name relocation prefix. Non-absolute values are ignored. */
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gcov_prefix = getenv("GCOV_PREFIX");
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if (gcov_prefix && IS_ABSOLUTE_PATH (gcov_prefix))
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{
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/* Check if the level of dirs to strip off specified. */
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char *tmp = getenv("GCOV_PREFIX_STRIP");
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if (tmp)
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{
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gcov_prefix_strip = atoi (tmp);
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/* Do not consider negative values. */
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if (gcov_prefix_strip < 0)
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gcov_prefix_strip = 0;
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}
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prefix_length = strlen(gcov_prefix);
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/* Remove an unnecessary trailing '/' */
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if (IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1]))
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prefix_length--;
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}
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else
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prefix_length = 0;
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/* Allocate and initialize the filename scratch space. */
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gi_filename = (char *) alloca (prefix_length + gcov_max_filename + 1);
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if (prefix_length)
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memcpy (gi_filename, gcov_prefix, prefix_length);
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gi_filename_up = gi_filename + prefix_length;
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/* Now merge each file. */
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for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
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{
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struct gcov_summary this_object;
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struct gcov_summary object, program;
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gcov_type *values[GCOV_COUNTERS];
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const struct gcov_fn_info *fi_ptr;
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unsigned fi_stride;
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unsigned c_ix, f_ix, n_counts;
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struct gcov_ctr_summary *cs_obj, *cs_tobj, *cs_prg, *cs_tprg, *cs_all;
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int error = 0;
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gcov_unsigned_t tag, length;
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gcov_position_t summary_pos = 0;
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gcov_position_t eof_pos = 0;
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memset (&this_object, 0, sizeof (this_object));
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memset (&object, 0, sizeof (object));
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/* Build relocated filename, stripping off leading
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directories from the initial filename if requested. */
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if (gcov_prefix_strip > 0)
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{
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int level = 0;
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const char *fname = gi_ptr->filename;
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const char *s;
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/* Skip selected directory levels. */
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for (s = fname + 1; (*s != '\0') && (level < gcov_prefix_strip); s++)
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if (IS_DIR_SEPARATOR(*s))
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{
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fname = s;
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level++;
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};
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/* Update complete filename with stripped original. */
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strcpy (gi_filename_up, fname);
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}
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else
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strcpy (gi_filename_up, gi_ptr->filename);
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/* Totals for this object file. */
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ci_ptr = gi_ptr->counts;
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for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
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{
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if (!((1 << t_ix) & gi_ptr->ctr_mask))
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continue;
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cs_ptr = &this_object.ctrs[t_ix];
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cs_ptr->num += ci_ptr->num;
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for (c_num = 0; c_num < ci_ptr->num; c_num++)
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{
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cs_ptr->sum_all += ci_ptr->values[c_num];
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if (cs_ptr->run_max < ci_ptr->values[c_num])
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cs_ptr->run_max = ci_ptr->values[c_num];
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}
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ci_ptr++;
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}
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c_ix = 0;
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for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
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if ((1 << t_ix) & gi_ptr->ctr_mask)
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|
{
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values[c_ix] = gi_ptr->counts[c_ix].values;
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c_ix++;
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|
}
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|
/* Calculate the function_info stride. This depends on the
|
|
number of counter types being measured. */
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|
fi_stride = sizeof (struct gcov_fn_info) + c_ix * sizeof (unsigned);
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if (__alignof__ (struct gcov_fn_info) > sizeof (unsigned))
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{
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fi_stride += __alignof__ (struct gcov_fn_info) - 1;
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fi_stride &= ~(__alignof__ (struct gcov_fn_info) - 1);
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|
}
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|
|
if (!gcov_open (gi_filename))
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|
{
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|
#ifdef TARGET_POSIX_IO
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|
/* Open failed likely due to missed directory.
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|
Create directory and retry to open file. */
|
|
if (create_file_directory (gi_filename))
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|
{
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|
fprintf (stderr, "profiling:%s:Skip\n", gi_filename);
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|
continue;
|
|
}
|
|
#endif
|
|
if (!gcov_open (gi_filename))
|
|
{
|
|
fprintf (stderr, "profiling:%s:Cannot open\n", gi_filename);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
tag = gcov_read_unsigned ();
|
|
if (tag)
|
|
{
|
|
/* Merge data from file. */
|
|
if (tag != GCOV_DATA_MAGIC)
|
|
{
|
|
fprintf (stderr, "profiling:%s:Not a gcov data file\n",
|
|
gi_filename);
|
|
goto read_fatal;
|
|
}
|
|
length = gcov_read_unsigned ();
|
|
if (!gcov_version (gi_ptr, length, gi_filename))
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goto read_fatal;
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|
|
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length = gcov_read_unsigned ();
|
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if (length != gi_ptr->stamp)
|
|
/* Read from a different compilation. Overwrite the file. */
|
|
goto rewrite;
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|
|
|
/* Merge execution counts for each function. */
|
|
for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++)
|
|
{
|
|
fi_ptr = (const struct gcov_fn_info *)
|
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((const char *) gi_ptr->functions + f_ix * fi_stride);
|
|
tag = gcov_read_unsigned ();
|
|
length = gcov_read_unsigned ();
|
|
|
|
/* Check function. */
|
|
if (tag != GCOV_TAG_FUNCTION
|
|
|| length != GCOV_TAG_FUNCTION_LENGTH
|
|
|| gcov_read_unsigned () != fi_ptr->ident
|
|
|| gcov_read_unsigned () != fi_ptr->checksum)
|
|
{
|
|
read_mismatch:;
|
|
fprintf (stderr, "profiling:%s:Merge mismatch for %s\n",
|
|
gi_filename,
|
|
f_ix + 1 ? "function" : "summaries");
|
|
goto read_fatal;
|
|
}
|
|
|
|
c_ix = 0;
|
|
for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
|
|
{
|
|
gcov_merge_fn merge;
|
|
|
|
if (!((1 << t_ix) & gi_ptr->ctr_mask))
|
|
continue;
|
|
|
|
n_counts = fi_ptr->n_ctrs[c_ix];
|
|
merge = gi_ptr->counts[c_ix].merge;
|
|
|
|
tag = gcov_read_unsigned ();
|
|
length = gcov_read_unsigned ();
|
|
if (tag != GCOV_TAG_FOR_COUNTER (t_ix)
|
|
|| length != GCOV_TAG_COUNTER_LENGTH (n_counts))
|
|
goto read_mismatch;
|
|
(*merge) (values[c_ix], n_counts);
|
|
values[c_ix] += n_counts;
|
|
c_ix++;
|
|
}
|
|
if ((error = gcov_is_error ()))
|
|
goto read_error;
|
|
}
|
|
|
|
f_ix = ~0u;
|
|
/* Check program & object summary */
|
|
while (1)
|
|
{
|
|
int is_program;
|
|
|
|
eof_pos = gcov_position ();
|
|
tag = gcov_read_unsigned ();
|
|
if (!tag)
|
|
break;
|
|
|
|
length = gcov_read_unsigned ();
|
|
is_program = tag == GCOV_TAG_PROGRAM_SUMMARY;
|
|
if (length != GCOV_TAG_SUMMARY_LENGTH
|
|
|| (!is_program && tag != GCOV_TAG_OBJECT_SUMMARY))
|
|
goto read_mismatch;
|
|
gcov_read_summary (is_program ? &program : &object);
|
|
if ((error = gcov_is_error ()))
|
|
goto read_error;
|
|
if (is_program && program.checksum == gcov_crc32)
|
|
{
|
|
summary_pos = eof_pos;
|
|
goto rewrite;
|
|
}
|
|
}
|
|
}
|
|
goto rewrite;
|
|
|
|
read_error:;
|
|
fprintf (stderr, error < 0 ? "profiling:%s:Overflow merging\n"
|
|
: "profiling:%s:Error merging\n", gi_filename);
|
|
|
|
read_fatal:;
|
|
gcov_close ();
|
|
continue;
|
|
|
|
rewrite:;
|
|
gcov_rewrite ();
|
|
if (!summary_pos)
|
|
memset (&program, 0, sizeof (program));
|
|
|
|
/* Merge the summaries. */
|
|
f_ix = ~0u;
|
|
for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
|
|
{
|
|
cs_obj = &object.ctrs[t_ix];
|
|
cs_tobj = &this_object.ctrs[t_ix];
|
|
cs_prg = &program.ctrs[t_ix];
|
|
cs_tprg = &this_program.ctrs[t_ix];
|
|
cs_all = &all.ctrs[t_ix];
|
|
|
|
if ((1 << t_ix) & gi_ptr->ctr_mask)
|
|
{
|
|
if (!cs_obj->runs++)
|
|
cs_obj->num = cs_tobj->num;
|
|
else if (cs_obj->num != cs_tobj->num)
|
|
goto read_mismatch;
|
|
cs_obj->sum_all += cs_tobj->sum_all;
|
|
if (cs_obj->run_max < cs_tobj->run_max)
|
|
cs_obj->run_max = cs_tobj->run_max;
|
|
cs_obj->sum_max += cs_tobj->run_max;
|
|
|
|
if (!cs_prg->runs++)
|
|
cs_prg->num = cs_tprg->num;
|
|
else if (cs_prg->num != cs_tprg->num)
|
|
goto read_mismatch;
|
|
cs_prg->sum_all += cs_tprg->sum_all;
|
|
if (cs_prg->run_max < cs_tprg->run_max)
|
|
cs_prg->run_max = cs_tprg->run_max;
|
|
cs_prg->sum_max += cs_tprg->run_max;
|
|
}
|
|
else if (cs_obj->num || cs_prg->num)
|
|
goto read_mismatch;
|
|
|
|
if (!cs_all->runs && cs_prg->runs)
|
|
memcpy (cs_all, cs_prg, sizeof (*cs_all));
|
|
else if (!all.checksum
|
|
&& (!GCOV_LOCKED || cs_all->runs == cs_prg->runs)
|
|
&& memcmp (cs_all, cs_prg, sizeof (*cs_all)))
|
|
{
|
|
fprintf (stderr, "profiling:%s:Invocation mismatch - some data files may have been removed%s",
|
|
gi_filename, GCOV_LOCKED
|
|
? "" : " or concurrent update without locking support");
|
|
all.checksum = ~0u;
|
|
}
|
|
}
|
|
|
|
c_ix = 0;
|
|
for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
|
|
if ((1 << t_ix) & gi_ptr->ctr_mask)
|
|
{
|
|
values[c_ix] = gi_ptr->counts[c_ix].values;
|
|
c_ix++;
|
|
}
|
|
|
|
program.checksum = gcov_crc32;
|
|
|
|
/* Write out the data. */
|
|
gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION);
|
|
gcov_write_unsigned (gi_ptr->stamp);
|
|
|
|
/* Write execution counts for each function. */
|
|
for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++)
|
|
{
|
|
fi_ptr = (const struct gcov_fn_info *)
|
|
((const char *) gi_ptr->functions + f_ix * fi_stride);
|
|
|
|
/* Announce function. */
|
|
gcov_write_tag_length (GCOV_TAG_FUNCTION, GCOV_TAG_FUNCTION_LENGTH);
|
|
gcov_write_unsigned (fi_ptr->ident);
|
|
gcov_write_unsigned (fi_ptr->checksum);
|
|
|
|
c_ix = 0;
|
|
for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
|
|
{
|
|
gcov_type *c_ptr;
|
|
|
|
if (!((1 << t_ix) & gi_ptr->ctr_mask))
|
|
continue;
|
|
|
|
n_counts = fi_ptr->n_ctrs[c_ix];
|
|
|
|
gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix),
|
|
GCOV_TAG_COUNTER_LENGTH (n_counts));
|
|
c_ptr = values[c_ix];
|
|
while (n_counts--)
|
|
gcov_write_counter (*c_ptr++);
|
|
|
|
values[c_ix] = c_ptr;
|
|
c_ix++;
|
|
}
|
|
}
|
|
|
|
/* Object file summary. */
|
|
gcov_write_summary (GCOV_TAG_OBJECT_SUMMARY, &object);
|
|
|
|
/* Generate whole program statistics. */
|
|
if (eof_pos)
|
|
gcov_seek (eof_pos);
|
|
gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &program);
|
|
if (!summary_pos)
|
|
gcov_write_unsigned (0);
|
|
if ((error = gcov_close ()))
|
|
fprintf (stderr, error < 0 ?
|
|
"profiling:%s:Overflow writing\n" :
|
|
"profiling:%s:Error writing\n",
|
|
gi_filename);
|
|
}
|
|
}
|
|
|
|
/* Add a new object file onto the bb chain. Invoked automatically
|
|
when running an object file's global ctors. */
|
|
|
|
void
|
|
__gcov_init (struct gcov_info *info)
|
|
{
|
|
if (!info->version)
|
|
return;
|
|
if (gcov_version (info, info->version, 0))
|
|
{
|
|
const char *ptr = info->filename;
|
|
gcov_unsigned_t crc32 = gcov_crc32;
|
|
size_t filename_length = strlen(info->filename);
|
|
|
|
/* Refresh the longest file name information */
|
|
if (filename_length > gcov_max_filename)
|
|
gcov_max_filename = filename_length;
|
|
|
|
do
|
|
{
|
|
unsigned ix;
|
|
gcov_unsigned_t value = *ptr << 24;
|
|
|
|
for (ix = 8; ix--; value <<= 1)
|
|
{
|
|
gcov_unsigned_t feedback;
|
|
|
|
feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0;
|
|
crc32 <<= 1;
|
|
crc32 ^= feedback;
|
|
}
|
|
}
|
|
while (*ptr++);
|
|
|
|
gcov_crc32 = crc32;
|
|
|
|
if (!gcov_list)
|
|
atexit (gcov_exit);
|
|
|
|
info->next = gcov_list;
|
|
gcov_list = info;
|
|
}
|
|
info->version = 0;
|
|
}
|
|
|
|
/* Called before fork or exec - write out profile information gathered so
|
|
far and reset it to zero. This avoids duplication or loss of the
|
|
profile information gathered so far. */
|
|
|
|
void
|
|
__gcov_flush (void)
|
|
{
|
|
const struct gcov_info *gi_ptr;
|
|
|
|
gcov_exit ();
|
|
for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
|
|
{
|
|
unsigned t_ix;
|
|
const struct gcov_ctr_info *ci_ptr;
|
|
|
|
for (t_ix = 0, ci_ptr = gi_ptr->counts; t_ix != GCOV_COUNTERS; t_ix++)
|
|
if ((1 << t_ix) & gi_ptr->ctr_mask)
|
|
{
|
|
memset (ci_ptr->values, 0, sizeof (gcov_type) * ci_ptr->num);
|
|
ci_ptr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* L_gcov */
|
|
|
|
#ifdef L_gcov_merge_add
|
|
/* The profile merging function that just adds the counters. It is given
|
|
an array COUNTERS of N_COUNTERS old counters and it reads the same number
|
|
of counters from the gcov file. */
|
|
void
|
|
__gcov_merge_add (gcov_type *counters, unsigned n_counters)
|
|
{
|
|
for (; n_counters; counters++, n_counters--)
|
|
*counters += gcov_read_counter ();
|
|
}
|
|
#endif /* L_gcov_merge_add */
|
|
|
|
#ifdef L_gcov_merge_single
|
|
/* The profile merging function for choosing the most common value.
|
|
It is given an array COUNTERS of N_COUNTERS old counters and it
|
|
reads the same number of counters from the gcov file. The counters
|
|
are split into 3-tuples where the members of the tuple have
|
|
meanings:
|
|
|
|
-- the stored candidate on the most common value of the measured entity
|
|
-- counter
|
|
-- total number of evaluations of the value */
|
|
void
|
|
__gcov_merge_single (gcov_type *counters, unsigned n_counters)
|
|
{
|
|
unsigned i, n_measures;
|
|
gcov_type value, counter, all;
|
|
|
|
gcc_assert (!(n_counters % 3));
|
|
n_measures = n_counters / 3;
|
|
for (i = 0; i < n_measures; i++, counters += 3)
|
|
{
|
|
value = gcov_read_counter ();
|
|
counter = gcov_read_counter ();
|
|
all = gcov_read_counter ();
|
|
|
|
if (counters[0] == value)
|
|
counters[1] += counter;
|
|
else if (counter > counters[1])
|
|
{
|
|
counters[0] = value;
|
|
counters[1] = counter - counters[1];
|
|
}
|
|
else
|
|
counters[1] -= counter;
|
|
counters[2] += all;
|
|
}
|
|
}
|
|
#endif /* L_gcov_merge_single */
|
|
|
|
#ifdef L_gcov_merge_delta
|
|
/* The profile merging function for choosing the most common
|
|
difference between two consecutive evaluations of the value. It is
|
|
given an array COUNTERS of N_COUNTERS old counters and it reads the
|
|
same number of counters from the gcov file. The counters are split
|
|
into 4-tuples where the members of the tuple have meanings:
|
|
|
|
-- the last value of the measured entity
|
|
-- the stored candidate on the most common difference
|
|
-- counter
|
|
-- total number of evaluations of the value */
|
|
void
|
|
__gcov_merge_delta (gcov_type *counters, unsigned n_counters)
|
|
{
|
|
unsigned i, n_measures;
|
|
gcov_type last, value, counter, all;
|
|
|
|
gcc_assert (!(n_counters % 4));
|
|
n_measures = n_counters / 4;
|
|
for (i = 0; i < n_measures; i++, counters += 4)
|
|
{
|
|
last = gcov_read_counter ();
|
|
value = gcov_read_counter ();
|
|
counter = gcov_read_counter ();
|
|
all = gcov_read_counter ();
|
|
|
|
if (counters[1] == value)
|
|
counters[2] += counter;
|
|
else if (counter > counters[2])
|
|
{
|
|
counters[1] = value;
|
|
counters[2] = counter - counters[2];
|
|
}
|
|
else
|
|
counters[2] -= counter;
|
|
counters[3] += all;
|
|
}
|
|
}
|
|
#endif /* L_gcov_merge_delta */
|
|
|
|
#ifdef L_gcov_interval_profiler
|
|
/* If VALUE is in interval <START, START + STEPS - 1>, then increases the
|
|
corresponding counter in COUNTERS. If the VALUE is above or below
|
|
the interval, COUNTERS[STEPS] or COUNTERS[STEPS + 1] is increased
|
|
instead. */
|
|
|
|
void
|
|
__gcov_interval_profiler (gcov_type *counters, gcov_type value,
|
|
int start, unsigned steps)
|
|
{
|
|
gcov_type delta = value - start;
|
|
if (delta < 0)
|
|
counters[steps + 1]++;
|
|
else if (delta >= steps)
|
|
counters[steps]++;
|
|
else
|
|
counters[delta]++;
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_pow2_profiler
|
|
/* If VALUE is a power of two, COUNTERS[1] is incremented. Otherwise
|
|
COUNTERS[0] is incremented. */
|
|
|
|
void
|
|
__gcov_pow2_profiler (gcov_type *counters, gcov_type value)
|
|
{
|
|
if (value & (value - 1))
|
|
counters[0]++;
|
|
else
|
|
counters[1]++;
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_one_value_profiler
|
|
/* Tries to determine the most common value among its inputs. Checks if the
|
|
value stored in COUNTERS[0] matches VALUE. If this is the case, COUNTERS[1]
|
|
is incremented. If this is not the case and COUNTERS[1] is not zero,
|
|
COUNTERS[1] is decremented. Otherwise COUNTERS[1] is set to one and
|
|
VALUE is stored to COUNTERS[0]. This algorithm guarantees that if this
|
|
function is called more than 50% of the time with one value, this value
|
|
will be in COUNTERS[0] in the end.
|
|
|
|
In any case, COUNTERS[2] is incremented. */
|
|
|
|
void
|
|
__gcov_one_value_profiler (gcov_type *counters, gcov_type value)
|
|
{
|
|
if (value == counters[0])
|
|
counters[1]++;
|
|
else if (counters[1] == 0)
|
|
{
|
|
counters[1] = 1;
|
|
counters[0] = value;
|
|
}
|
|
else
|
|
counters[1]--;
|
|
counters[2]++;
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_fork
|
|
/* A wrapper for the fork function. Flushes the accumulated profiling data, so
|
|
that they are not counted twice. */
|
|
|
|
pid_t
|
|
__gcov_fork (void)
|
|
{
|
|
__gcov_flush ();
|
|
return fork ();
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_execl
|
|
/* A wrapper for the execl function. Flushes the accumulated profiling data, so
|
|
that they are not lost. */
|
|
|
|
int
|
|
__gcov_execl (const char *path, const char *arg, ...)
|
|
{
|
|
va_list ap, aq;
|
|
unsigned i, length;
|
|
char **args;
|
|
|
|
__gcov_flush ();
|
|
|
|
va_start (ap, arg);
|
|
va_copy (aq, ap);
|
|
|
|
length = 2;
|
|
while (va_arg (ap, char *))
|
|
length++;
|
|
va_end (ap);
|
|
|
|
args = (char **) alloca (length * sizeof (void *));
|
|
args[0] = (char *) arg;
|
|
for (i = 1; i < length; i++)
|
|
args[i] = va_arg (aq, char *);
|
|
va_end (aq);
|
|
|
|
return execv (path, args);
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_execlp
|
|
/* A wrapper for the execlp function. Flushes the accumulated profiling data, so
|
|
that they are not lost. */
|
|
|
|
int
|
|
__gcov_execlp (const char *path, const char *arg, ...)
|
|
{
|
|
va_list ap, aq;
|
|
unsigned i, length;
|
|
char **args;
|
|
|
|
__gcov_flush ();
|
|
|
|
va_start (ap, arg);
|
|
va_copy (aq, ap);
|
|
|
|
length = 2;
|
|
while (va_arg (ap, char *))
|
|
length++;
|
|
va_end (ap);
|
|
|
|
args = (char **) alloca (length * sizeof (void *));
|
|
args[0] = (char *) arg;
|
|
for (i = 1; i < length; i++)
|
|
args[i] = va_arg (aq, char *);
|
|
va_end (aq);
|
|
|
|
return execvp (path, args);
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_execle
|
|
/* A wrapper for the execle function. Flushes the accumulated profiling data, so
|
|
that they are not lost. */
|
|
|
|
int
|
|
__gcov_execle (const char *path, const char *arg, ...)
|
|
{
|
|
va_list ap, aq;
|
|
unsigned i, length;
|
|
char **args;
|
|
char **envp;
|
|
|
|
__gcov_flush ();
|
|
|
|
va_start (ap, arg);
|
|
va_copy (aq, ap);
|
|
|
|
length = 2;
|
|
while (va_arg (ap, char *))
|
|
length++;
|
|
va_end (ap);
|
|
|
|
args = (char **) alloca (length * sizeof (void *));
|
|
args[0] = (char *) arg;
|
|
for (i = 1; i < length; i++)
|
|
args[i] = va_arg (aq, char *);
|
|
envp = va_arg (aq, char **);
|
|
va_end (aq);
|
|
|
|
return execve (path, args, envp);
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_execv
|
|
/* A wrapper for the execv function. Flushes the accumulated profiling data, so
|
|
that they are not lost. */
|
|
|
|
int
|
|
__gcov_execv (const char *path, char *const argv[])
|
|
{
|
|
__gcov_flush ();
|
|
return execv (path, argv);
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_execvp
|
|
/* A wrapper for the execvp function. Flushes the accumulated profiling data, so
|
|
that they are not lost. */
|
|
|
|
int
|
|
__gcov_execvp (const char *path, char *const argv[])
|
|
{
|
|
__gcov_flush ();
|
|
return execvp (path, argv);
|
|
}
|
|
#endif
|
|
|
|
#ifdef L_gcov_execve
|
|
/* A wrapper for the execve function. Flushes the accumulated profiling data, so
|
|
that they are not lost. */
|
|
|
|
int
|
|
__gcov_execve (const char *path, char *const argv[], char *const envp[])
|
|
{
|
|
__gcov_flush ();
|
|
return execve (path, argv, envp);
|
|
}
|
|
#endif
|
|
#endif /* inhibit_libc */
|