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gcc/libgcc/libgcov.h
Martin Liska 8c9434c2f9 gcov: dump in a static dtor instead of in an atexit handler 
PR gcov-profile/7970
	PR gcov-profile/16855
	PR gcov-profile/44779
	* g++.dg/gcov/pr16855.C: New test.
	* coverage.c (build_gcov_exit_decl): New function.
	(coverage_obj_init): Call the function and generate __gcov_exit
	destructor.
	* doc/gcov.texi: Document when __gcov_exit function is called.
	* libgcov-driver.c (__gcov_init): Do not register a atexit
	handler.
	(__gcov_exit): Rename from gcov_exit.
	* libgcov.h (__gcov_exit): Declare.

From-SVN: r240529
2016-09-27 11:07:11 +00:00

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/* Header file for libgcov-*.c.
Copyright (C) 1996-2016 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_LIBGCOV_H
#define GCC_LIBGCOV_H
/* work around the poisoned malloc/calloc in system.h. */
#ifndef xmalloc
#define xmalloc malloc
#endif
#ifndef xcalloc
#define xcalloc calloc
#endif
#ifndef IN_GCOV_TOOL
/* About the target. */
/* This path will be used by libgcov runtime. */
#include "tconfig.h"
#include "tsystem.h"
#include "coretypes.h"
#include "tm.h"
#include "libgcc_tm.h"
#if __CHAR_BIT__ == 8
typedef unsigned gcov_unsigned_t __attribute__ ((mode (SI)));
typedef unsigned gcov_position_t __attribute__ ((mode (SI)));
#if LONG_LONG_TYPE_SIZE > 32
typedef signed gcov_type __attribute__ ((mode (DI)));
typedef unsigned gcov_type_unsigned __attribute__ ((mode (DI)));
#else
typedef signed gcov_type __attribute__ ((mode (SI)));
typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI)));
#endif
#else
#if __CHAR_BIT__ == 16
typedef unsigned gcov_unsigned_t __attribute__ ((mode (HI)));
typedef unsigned gcov_position_t __attribute__ ((mode (HI)));
#if LONG_LONG_TYPE_SIZE > 32
typedef signed gcov_type __attribute__ ((mode (SI)));
typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI)));
#else
typedef signed gcov_type __attribute__ ((mode (HI)));
typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI)));
#endif
#else
typedef unsigned gcov_unsigned_t __attribute__ ((mode (QI)));
typedef unsigned gcov_position_t __attribute__ ((mode (QI)));
#if LONG_LONG_TYPE_SIZE > 32
typedef signed gcov_type __attribute__ ((mode (HI)));
typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI)));
#else
typedef signed gcov_type __attribute__ ((mode (QI)));
typedef unsigned gcov_type_unsigned __attribute__ ((mode (QI)));
#endif
#endif
#endif
#if defined (TARGET_POSIX_IO)
#define GCOV_LOCKED 1
#else
#define GCOV_LOCKED 0
#endif
/* In libgcov we need these functions to be extern, so prefix them with
__gcov. In libgcov they must also be hidden so that the instance in
the executable is not also used in a DSO. */
#define gcov_var __gcov_var
#define gcov_open __gcov_open
#define gcov_close __gcov_close
#define gcov_write_tag_length __gcov_write_tag_length
#define gcov_position __gcov_position
#define gcov_seek __gcov_seek
#define gcov_rewrite __gcov_rewrite
#define gcov_is_error __gcov_is_error
#define gcov_write_unsigned __gcov_write_unsigned
#define gcov_write_counter __gcov_write_counter
#define gcov_write_summary __gcov_write_summary
#define gcov_read_unsigned __gcov_read_unsigned
#define gcov_read_counter __gcov_read_counter
#define gcov_read_summary __gcov_read_summary
#define gcov_sort_n_vals __gcov_sort_n_vals
#else /* IN_GCOV_TOOL */
/* About the host. */
/* This path will be compiled for the host and linked into
gcov-tool binary. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
typedef unsigned gcov_unsigned_t;
typedef unsigned gcov_position_t;
/* gcov_type is typedef'd elsewhere for the compiler */
#if defined (HOST_HAS_F_SETLKW)
#define GCOV_LOCKED 1
#else
#define GCOV_LOCKED 0
#endif
/* Some Macros specific to gcov-tool. */
#define L_gcov 1
#define L_gcov_merge_add 1
#define L_gcov_merge_single 1
#define L_gcov_merge_ior 1
#define L_gcov_merge_time_profile 1
#define L_gcov_merge_icall_topn 1
extern gcov_type gcov_read_counter_mem ();
extern unsigned gcov_get_merge_weight ();
extern struct gcov_info *gcov_list;
#endif /* !IN_GCOV_TOOL */
#if defined(inhibit_libc)
#define IN_LIBGCOV (-1)
#else
#define IN_LIBGCOV 1
#if defined(L_gcov)
#define GCOV_LINKAGE /* nothing */
#endif
#endif
/* Poison these, so they don't accidentally slip in. */
#pragma GCC poison gcov_write_string gcov_write_tag gcov_write_length
#pragma GCC poison gcov_time gcov_magic
#ifdef HAVE_GAS_HIDDEN
#define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden")))
#else
#define ATTRIBUTE_HIDDEN
#endif
#include "gcov-io.h"
/* Structures embedded in coveraged program. The structures generated
by write_profile must match these. */
/* Information about counters for a single function. */
struct gcov_ctr_info
{
gcov_unsigned_t num; /* number of counters. */
gcov_type *values; /* their values. */
};
/* Information about a single function. This uses the trailing array
idiom. The number of counters is determined from the merge pointer
array in gcov_info. The key is used to detect which of a set of
comdat functions was selected -- it points to the gcov_info object
of the object file containing the selected comdat function. */
struct gcov_fn_info
{
const struct gcov_info *key; /* comdat key */
gcov_unsigned_t ident; /* unique ident of function */
gcov_unsigned_t lineno_checksum; /* function lineo_checksum */
gcov_unsigned_t cfg_checksum; /* function cfg checksum */
struct gcov_ctr_info ctrs[1]; /* instrumented counters */
};
/* Type of function used to merge counters. */
typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t);
/* Information about a single object file. */
struct gcov_info
{
gcov_unsigned_t version; /* expected version number */
struct gcov_info *next; /* link to next, used by libgcov */
gcov_unsigned_t stamp; /* uniquifying time stamp */
const char *filename; /* output file name */
gcov_merge_fn merge[GCOV_COUNTERS]; /* merge functions (null for
unused) */
unsigned n_functions; /* number of functions */
#ifndef IN_GCOV_TOOL
const struct gcov_fn_info *const *functions; /* pointer to pointers
to function information */
#else
const struct gcov_fn_info **functions;
#endif /* !IN_GCOV_TOOL */
};
/* Root of a program/shared-object state */
struct gcov_root
{
struct gcov_info *list;
unsigned dumped : 1; /* counts have been dumped. */
unsigned run_counted : 1; /* run has been accounted for. */
struct gcov_root *next;
struct gcov_root *prev;
};
extern struct gcov_root __gcov_root ATTRIBUTE_HIDDEN;
struct gcov_master
{
gcov_unsigned_t version;
struct gcov_root *root;
};
/* Exactly one of these will be active in the process. */
extern struct gcov_master __gcov_master;
/* Dump a set of gcov objects. */
extern void __gcov_dump_one (struct gcov_root *) ATTRIBUTE_HIDDEN;
/* Register a new object file module. */
extern void __gcov_init (struct gcov_info *) ATTRIBUTE_HIDDEN;
/* GCOV exit function registered via a static destructor. */
extern void __gcov_exit (void) ATTRIBUTE_HIDDEN;
/* Called before fork, to avoid double counting. */
extern void __gcov_flush (void) ATTRIBUTE_HIDDEN;
/* Function to reset all counters to 0. Both externally visible (and
overridable) and internal version. */
extern void __gcov_reset (void);
extern void __gcov_reset_int (void) ATTRIBUTE_HIDDEN;
/* User function to enable early write of profile information so far. */
extern void __gcov_dump (void);
extern void __gcov_dump_int (void) ATTRIBUTE_HIDDEN;
/* The merge function that just sums the counters. */
extern void __gcov_merge_add (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
/* The merge function to select the minimum valid counter value. */
extern void __gcov_merge_time_profile (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
/* The merge function to choose the most common value. */
extern void __gcov_merge_single (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
/* The merge function that just ors the counters together. */
extern void __gcov_merge_ior (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
/* The merge function is used for topn indirect call counters. */
extern void __gcov_merge_icall_topn (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
/* The profiler functions. */
extern void __gcov_interval_profiler (gcov_type *, gcov_type, int, unsigned);
extern void __gcov_interval_profiler_atomic (gcov_type *, gcov_type, int,
unsigned);
extern void __gcov_pow2_profiler (gcov_type *, gcov_type);
extern void __gcov_pow2_profiler_atomic (gcov_type *, gcov_type);
extern void __gcov_one_value_profiler (gcov_type *, gcov_type);
extern void __gcov_one_value_profiler_atomic (gcov_type *, gcov_type);
extern void __gcov_indirect_call_profiler_v2 (gcov_type, void *);
extern void __gcov_time_profiler (gcov_type *);
extern void __gcov_time_profiler_atomic (gcov_type *);
extern void __gcov_average_profiler (gcov_type *, gcov_type);
extern void __gcov_average_profiler_atomic (gcov_type *, gcov_type);
extern void __gcov_ior_profiler (gcov_type *, gcov_type);
extern void __gcov_ior_profiler_atomic (gcov_type *, gcov_type);
extern void __gcov_indirect_call_topn_profiler (gcov_type, void *);
extern void gcov_sort_n_vals (gcov_type *, int);
#ifndef inhibit_libc
/* The wrappers around some library functions.. */
extern pid_t __gcov_fork (void) ATTRIBUTE_HIDDEN;
extern int __gcov_execl (const char *, char *, ...) ATTRIBUTE_HIDDEN;
extern int __gcov_execlp (const char *, char *, ...) ATTRIBUTE_HIDDEN;
extern int __gcov_execle (const char *, char *, ...) ATTRIBUTE_HIDDEN;
extern int __gcov_execv (const char *, char *const []) ATTRIBUTE_HIDDEN;
extern int __gcov_execvp (const char *, char *const []) ATTRIBUTE_HIDDEN;
extern int __gcov_execve (const char *, char *const [], char *const [])
ATTRIBUTE_HIDDEN;
/* Functions that only available in libgcov. */
GCOV_LINKAGE int gcov_open (const char */*name*/) ATTRIBUTE_HIDDEN;
GCOV_LINKAGE void gcov_write_counter (gcov_type) ATTRIBUTE_HIDDEN;
GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t)
ATTRIBUTE_HIDDEN;
GCOV_LINKAGE void gcov_write_summary (gcov_unsigned_t /*tag*/,
const struct gcov_summary *)
ATTRIBUTE_HIDDEN;
GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/) ATTRIBUTE_HIDDEN;
GCOV_LINKAGE void gcov_rewrite (void) ATTRIBUTE_HIDDEN;
/* "Counts" stored in gcda files can be a real counter value, or
an target address. When differentiate these two types because
when manipulating counts, we should only change real counter values,
rather target addresses. */
static inline gcov_type
gcov_get_counter (void)
{
#ifndef IN_GCOV_TOOL
/* This version is for reading count values in libgcov runtime:
we read from gcda files. */
return gcov_read_counter ();
#else
/* This version is for gcov-tool. We read the value from memory and
multiply it by the merge weight. */
return gcov_read_counter_mem () * gcov_get_merge_weight ();
#endif
}
/* Similar function as gcov_get_counter(), but handles target address
counters. */
static inline gcov_type
gcov_get_counter_target (void)
{
#ifndef IN_GCOV_TOOL
/* This version is for reading count target values in libgcov runtime:
we read from gcda files. */
return gcov_read_counter ();
#else
/* This version is for gcov-tool. We read the value from memory and we do NOT
multiply it by the merge weight. */
return gcov_read_counter_mem ();
#endif
}
#endif /* !inhibit_libc */
#endif /* GCC_LIBGCOV_H */
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