5fc312a98e
libgcc/ChangeLog: * libgcov-util.c (read_gcda_finalize): Remove const operator. (merge_wrapper): Add both counts and use them properly. (topn_to_memory_representation): New function. (gcov_merge): Covert on disk representation to in memory representation. * libgcov.h: Remove const operator.
489 lines
15 KiB
C
489 lines
15 KiB
C
/* Header file for libgcov-*.c.
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Copyright (C) 1996-2020 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 3, or (at your option) any later
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version.
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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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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_LIBGCOV_H
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#define GCC_LIBGCOV_H
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/* work around the poisoned malloc/calloc in system.h. */
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#ifndef xmalloc
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#define xmalloc malloc
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#endif
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#ifndef xcalloc
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#define xcalloc calloc
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#endif
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#ifndef IN_GCOV_TOOL
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/* About the target. */
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/* This path will be used by libgcov runtime. */
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#include "tconfig.h"
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#include "auto-target.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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#include "libgcc_tm.h"
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#include "gcov.h"
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#if __CHAR_BIT__ == 8
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typedef unsigned gcov_unsigned_t __attribute__ ((mode (SI)));
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typedef unsigned gcov_position_t __attribute__ ((mode (SI)));
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#if LONG_LONG_TYPE_SIZE > 32
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typedef signed gcov_type __attribute__ ((mode (DI)));
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typedef unsigned gcov_type_unsigned __attribute__ ((mode (DI)));
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#else
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typedef signed gcov_type __attribute__ ((mode (SI)));
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typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI)));
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#endif
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#else
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#if __CHAR_BIT__ == 16
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typedef unsigned gcov_unsigned_t __attribute__ ((mode (HI)));
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typedef unsigned gcov_position_t __attribute__ ((mode (HI)));
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#if LONG_LONG_TYPE_SIZE > 32
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typedef signed gcov_type __attribute__ ((mode (SI)));
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typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI)));
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#else
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typedef signed gcov_type __attribute__ ((mode (HI)));
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typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI)));
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#endif
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#else
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typedef unsigned gcov_unsigned_t __attribute__ ((mode (QI)));
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typedef unsigned gcov_position_t __attribute__ ((mode (QI)));
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#if LONG_LONG_TYPE_SIZE > 32
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typedef signed gcov_type __attribute__ ((mode (HI)));
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typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI)));
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#else
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typedef signed gcov_type __attribute__ ((mode (QI)));
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typedef unsigned gcov_type_unsigned __attribute__ ((mode (QI)));
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#endif
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#endif
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#endif
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#if defined (TARGET_POSIX_IO)
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#define GCOV_LOCKED 1
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#else
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#define GCOV_LOCKED 0
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#endif
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#ifndef GCOV_SUPPORTS_ATOMIC
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/* Detect whether target can support atomic update of profilers. */
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#if __SIZEOF_LONG_LONG__ == 4 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
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#define GCOV_SUPPORTS_ATOMIC 1
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#else
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#if __SIZEOF_LONG_LONG__ == 8 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
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#define GCOV_SUPPORTS_ATOMIC 1
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#else
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#define GCOV_SUPPORTS_ATOMIC 0
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#endif
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#endif
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#endif
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/* In libgcov we need these functions to be extern, so prefix them with
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__gcov. In libgcov they must also be hidden so that the instance in
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the executable is not also used in a DSO. */
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#define gcov_var __gcov_var
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#define gcov_open __gcov_open
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#define gcov_close __gcov_close
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#define gcov_write_tag_length __gcov_write_tag_length
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#define gcov_position __gcov_position
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#define gcov_seek __gcov_seek
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#define gcov_rewrite __gcov_rewrite
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#define gcov_is_error __gcov_is_error
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#define gcov_write_unsigned __gcov_write_unsigned
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#define gcov_write_counter __gcov_write_counter
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#define gcov_write_summary __gcov_write_summary
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#define gcov_read_unsigned __gcov_read_unsigned
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#define gcov_read_counter __gcov_read_counter
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#define gcov_read_summary __gcov_read_summary
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#else /* IN_GCOV_TOOL */
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/* About the host. */
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/* This path will be compiled for the host and linked into
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gcov-tool binary. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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typedef unsigned gcov_unsigned_t;
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typedef unsigned gcov_position_t;
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/* gcov_type is typedef'd elsewhere for the compiler */
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#if defined (HOST_HAS_F_SETLKW)
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#define GCOV_LOCKED 1
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#else
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#define GCOV_LOCKED 0
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#endif
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/* Some Macros specific to gcov-tool. */
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#define L_gcov 1
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#define L_gcov_merge_add 1
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#define L_gcov_merge_topn 1
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#define L_gcov_merge_ior 1
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#define L_gcov_merge_time_profile 1
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extern gcov_type gcov_read_counter_mem ();
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extern unsigned gcov_get_merge_weight ();
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extern struct gcov_info *gcov_list;
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#endif /* !IN_GCOV_TOOL */
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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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#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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/* Poison these, so they don't accidentally slip in. */
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#pragma GCC poison gcov_write_string gcov_write_tag gcov_write_length
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#pragma GCC poison gcov_time
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#ifdef HAVE_GAS_HIDDEN
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#define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden")))
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#else
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#define ATTRIBUTE_HIDDEN
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#endif
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#include "gcov-io.h"
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/* Structures embedded in coveraged program. The structures generated
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by write_profile must match these. */
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/* Information about counters for a single function. */
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struct gcov_ctr_info
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{
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gcov_unsigned_t num; /* number of counters. */
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gcov_type *values; /* their values. */
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};
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/* Information about a single function. This uses the trailing array
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idiom. The number of counters is determined from the merge pointer
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array in gcov_info. The key is used to detect which of a set of
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comdat functions was selected -- it points to the gcov_info object
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of the object file containing the selected comdat function. */
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struct gcov_fn_info
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{
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const struct gcov_info *key; /* comdat key */
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gcov_unsigned_t ident; /* unique ident of function */
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gcov_unsigned_t lineno_checksum; /* function lineo_checksum */
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gcov_unsigned_t cfg_checksum; /* function cfg checksum */
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struct gcov_ctr_info ctrs[1]; /* instrumented counters */
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};
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/* Type of function used to merge counters. */
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typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t);
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/* Information about a single object file. */
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struct gcov_info
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{
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gcov_unsigned_t version; /* expected version number */
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struct gcov_info *next; /* link to next, used by libgcov */
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gcov_unsigned_t stamp; /* uniquifying time stamp */
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const char *filename; /* output file name */
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gcov_merge_fn merge[GCOV_COUNTERS]; /* merge functions (null for
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unused) */
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unsigned n_functions; /* number of functions */
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#ifndef IN_GCOV_TOOL
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const struct gcov_fn_info *const *functions; /* pointer to pointers
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to function information */
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#else
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struct gcov_fn_info **functions;
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#endif /* !IN_GCOV_TOOL */
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};
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/* Root of a program/shared-object state */
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struct gcov_root
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{
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struct gcov_info *list;
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unsigned dumped : 1; /* counts have been dumped. */
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unsigned run_counted : 1; /* run has been accounted for. */
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struct gcov_root *next;
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struct gcov_root *prev;
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};
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extern struct gcov_root __gcov_root ATTRIBUTE_HIDDEN;
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struct gcov_master
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{
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gcov_unsigned_t version;
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struct gcov_root *root;
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};
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struct indirect_call_tuple
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{
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/* Callee function. */
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void *callee;
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/* Pointer to counters. */
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gcov_type *counters;
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};
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/* Exactly one of these will be active in the process. */
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extern struct gcov_master __gcov_master;
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/* Dump a set of gcov objects. */
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extern void __gcov_dump_one (struct gcov_root *) ATTRIBUTE_HIDDEN;
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/* Register a new object file module. */
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extern void __gcov_init (struct gcov_info *) ATTRIBUTE_HIDDEN;
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/* GCOV exit function registered via a static destructor. */
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extern void __gcov_exit (void) ATTRIBUTE_HIDDEN;
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/* Function to reset all counters to 0. Both externally visible (and
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overridable) and internal version. */
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extern void __gcov_reset_int (void) ATTRIBUTE_HIDDEN;
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/* User function to enable early write of profile information so far. */
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extern void __gcov_dump_int (void) ATTRIBUTE_HIDDEN;
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/* Lock critical section for __gcov_dump and __gcov_reset functions. */
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extern void __gcov_lock (void) ATTRIBUTE_HIDDEN;
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/* Unlock critical section for __gcov_dump and __gcov_reset functions. */
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extern void __gcov_unlock (void) ATTRIBUTE_HIDDEN;
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/* The merge function that just sums the counters. */
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extern void __gcov_merge_add (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
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/* The merge function to select the minimum valid counter value. */
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extern void __gcov_merge_time_profile (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
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/* The merge function to choose the most common N values. */
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extern void __gcov_merge_topn (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
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/* The merge function that just ors the counters together. */
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extern void __gcov_merge_ior (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
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/* The profiler functions. */
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extern void __gcov_interval_profiler (gcov_type *, gcov_type, int, unsigned);
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extern void __gcov_interval_profiler_atomic (gcov_type *, gcov_type, int,
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unsigned);
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extern void __gcov_pow2_profiler (gcov_type *, gcov_type);
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extern void __gcov_pow2_profiler_atomic (gcov_type *, gcov_type);
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extern void __gcov_topn_values_profiler (gcov_type *, gcov_type);
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extern void __gcov_topn_values_profiler_atomic (gcov_type *, gcov_type);
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extern void __gcov_indirect_call_profiler_v4 (gcov_type, void *);
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extern void __gcov_indirect_call_profiler_v4_atomic (gcov_type, void *);
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extern void __gcov_time_profiler (gcov_type *);
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extern void __gcov_time_profiler_atomic (gcov_type *);
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extern void __gcov_average_profiler (gcov_type *, gcov_type);
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extern void __gcov_average_profiler_atomic (gcov_type *, gcov_type);
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extern void __gcov_ior_profiler (gcov_type *, gcov_type);
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extern void __gcov_ior_profiler_atomic (gcov_type *, gcov_type);
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#ifndef inhibit_libc
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/* The wrappers around some library functions.. */
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extern pid_t __gcov_fork (void) ATTRIBUTE_HIDDEN;
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extern int __gcov_execl (const char *, char *, ...) ATTRIBUTE_HIDDEN;
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extern int __gcov_execlp (const char *, char *, ...) ATTRIBUTE_HIDDEN;
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extern int __gcov_execle (const char *, char *, ...) ATTRIBUTE_HIDDEN;
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extern int __gcov_execv (const char *, char *const []) ATTRIBUTE_HIDDEN;
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extern int __gcov_execvp (const char *, char *const []) ATTRIBUTE_HIDDEN;
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extern int __gcov_execve (const char *, char *const [], char *const [])
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ATTRIBUTE_HIDDEN;
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/* Functions that only available in libgcov. */
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GCOV_LINKAGE int gcov_open (const char */*name*/) ATTRIBUTE_HIDDEN;
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GCOV_LINKAGE void gcov_write_counter (gcov_type) ATTRIBUTE_HIDDEN;
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GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t)
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ATTRIBUTE_HIDDEN;
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GCOV_LINKAGE void gcov_write_summary (gcov_unsigned_t /*tag*/,
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const struct gcov_summary *)
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ATTRIBUTE_HIDDEN;
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GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/) ATTRIBUTE_HIDDEN;
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GCOV_LINKAGE void gcov_rewrite (void) ATTRIBUTE_HIDDEN;
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/* "Counts" stored in gcda files can be a real counter value, or
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an target address. When differentiate these two types because
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when manipulating counts, we should only change real counter values,
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rather target addresses. */
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static inline gcov_type
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gcov_get_counter (void)
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{
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#ifndef IN_GCOV_TOOL
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/* This version is for reading count values in libgcov runtime:
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we read from gcda files. */
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return gcov_read_counter ();
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#else
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/* This version is for gcov-tool. We read the value from memory and
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multiply it by the merge weight. */
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return gcov_read_counter_mem () * gcov_get_merge_weight ();
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#endif
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}
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/* Similar function as gcov_get_counter(), but do not scale
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when read value is equal to IGNORE_SCALING. */
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static inline gcov_type
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gcov_get_counter_ignore_scaling (gcov_type ignore_scaling ATTRIBUTE_UNUSED)
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{
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#ifndef IN_GCOV_TOOL
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/* This version is for reading count values in libgcov runtime:
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we read from gcda files. */
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return gcov_read_counter ();
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#else
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/* This version is for gcov-tool. We read the value from memory and
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multiply it by the merge weight. */
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gcov_type v = gcov_read_counter_mem ();
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if (v != ignore_scaling)
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v *= gcov_get_merge_weight ();
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return v;
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#endif
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}
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/* Similar function as gcov_get_counter(), but handles target address
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counters. */
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static inline gcov_type
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gcov_get_counter_target (void)
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{
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#ifndef IN_GCOV_TOOL
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/* This version is for reading count target values in libgcov runtime:
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we read from gcda files. */
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return gcov_read_counter ();
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#else
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/* This version is for gcov-tool. We read the value from memory and we do NOT
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multiply it by the merge weight. */
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return gcov_read_counter_mem ();
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#endif
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}
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/* Add VALUE to *COUNTER and make it with atomic operation
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if USE_ATOMIC is true. */
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static inline void
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gcov_counter_add (gcov_type *counter, gcov_type value,
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int use_atomic ATTRIBUTE_UNUSED)
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{
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#if GCOV_SUPPORTS_ATOMIC
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if (use_atomic)
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__atomic_fetch_add (counter, value, __ATOMIC_RELAXED);
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else
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#endif
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*counter += value;
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}
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/* Add key value pair VALUE:COUNT to a top N COUNTERS. When INCREMENT_TOTAL
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is true, add COUNT to total of the TOP counter. If USE_ATOMIC is true,
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do it in atomic way. */
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static inline void
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gcov_topn_add_value (gcov_type *counters, gcov_type value, gcov_type count,
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int use_atomic, int increment_total)
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{
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if (increment_total)
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gcov_counter_add (&counters[0], 1, use_atomic);
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struct gcov_kvp *prev_node = NULL;
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struct gcov_kvp *minimal_node = NULL;
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struct gcov_kvp *current_node = (struct gcov_kvp *)(intptr_t)counters[2];
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while (current_node)
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{
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if (current_node->value == value)
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{
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gcov_counter_add (¤t_node->count, count, use_atomic);
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return;
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}
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if (minimal_node == NULL
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|| current_node->count < minimal_node->count)
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minimal_node = current_node;
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prev_node = current_node;
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current_node = current_node->next;
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}
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if (counters[1] == GCOV_TOPN_MAXIMUM_TRACKED_VALUES)
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{
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if (--minimal_node->count < count)
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{
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minimal_node->value = value;
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minimal_node->count = count;
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}
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}
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else
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{
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struct gcov_kvp *new_node
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= (struct gcov_kvp *)xcalloc (1, sizeof (struct gcov_kvp));
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new_node->value = value;
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new_node->count = count;
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int success = 0;
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if (!counters[2])
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{
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#if GCOV_SUPPORTS_ATOMIC
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if (use_atomic)
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{
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struct gcov_kvp **ptr = (struct gcov_kvp **)(intptr_t)&counters[2];
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success = !__sync_val_compare_and_swap (ptr, 0, new_node);
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}
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else
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#endif
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{
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counters[2] = (intptr_t)new_node;
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success = 1;
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}
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}
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else if (prev_node && !prev_node->next)
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{
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#if GCOV_SUPPORTS_ATOMIC
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if (use_atomic)
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success = !__sync_val_compare_and_swap (&prev_node->next, 0,
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new_node);
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else
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#endif
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{
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prev_node->next = new_node;
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success = 1;
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}
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}
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/* Increment number of nodes. */
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if (success)
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gcov_counter_add (&counters[1], 1, use_atomic);
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}
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}
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#endif /* !inhibit_libc */
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#endif /* GCC_LIBGCOV_H */
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