939 lines
26 KiB
C
939 lines
26 KiB
C
/* Read and display shared object profiling data.
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Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <argp.h>
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#include <dlfcn.h>
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#include <elf.h>
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#include <endian.h>
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#include <error.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <libintl.h>
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#include <link.h>
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#include <locale.h>
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#include <obstack.h>
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#include <search.h>
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#include <stab.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/gmon.h>
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#include <sys/gmon_out.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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/* Undefine the following line line in the production version. */
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/* #define _NDEBUG 1 */
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#include <assert.h>
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/* Get libc version number. */
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#include "../version.h"
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#define PACKAGE _libc_intl_domainname
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#include <endian.h>
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#if BYTE_ORDER == BIG_ENDIAN
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#define byteorder ELFDATA2MSB
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#define byteorder_name "big-endian"
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#elif BYTE_ORDER == LITTLE_ENDIAN
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#define byteorder ELFDATA2LSB
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#define byteorder_name "little-endian"
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#else
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#error "Unknown BYTE_ORDER " BYTE_ORDER
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#define byteorder ELFDATANONE
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#endif
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extern int __profile_frequency __P ((void));
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/* Name and version of program. */
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static void print_version (FILE *stream, struct argp_state *state);
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void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
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#define OPT_COUNT_TOTAL 1
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#define OPT_TEST 2
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/* Definitions of arguments for argp functions. */
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static const struct argp_option options[] =
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{
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{ NULL, 0, NULL, 0, N_("Output selection:") },
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{ "count-total", OPT_COUNT_TOTAL, NULL, 0,
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N_("print number of invocations for each function") },
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{ "test", OPT_TEST, NULL, OPTION_HIDDEN, NULL },
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{ NULL, 0, NULL, 0, NULL }
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};
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/* Short description of program. */
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static const char doc[] = N_("Read and display shared object profiling data");
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/* Strings for arguments in help texts. */
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static const char args_doc[] = N_("SHOBJ [PROFDATA]");
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/* Prototype for option handler. */
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static error_t parse_opt (int key, char *arg, struct argp_state *state);
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/* Data structure to communicate with argp functions. */
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static struct argp argp =
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{
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options, parse_opt, args_doc, doc, NULL, NULL
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};
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/* Operation modes. */
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static enum
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{
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NONE = 0,
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COUNT_TOTAL
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} mode;
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/* If nonzero the total number of invocations of a function is emitted. */
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int count_total;
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/* Nozero for testing. */
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int do_test;
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/* Strcuture describing calls. */
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struct here_fromstruct
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{
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struct here_cg_arc_record volatile *here;
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uint16_t link;
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};
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/* We define a special type to address the elements of the arc table.
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This is basically the `gmon_cg_arc_record' format but it includes
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the room for the tag and it uses real types. */
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struct here_cg_arc_record
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{
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uintptr_t from_pc;
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uintptr_t self_pc;
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uint32_t count;
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} __attribute__ ((packed));
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/* Information about the stab debugging info. This should be in a
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head but it is not. */
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#define STRDXOFF (0)
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#define TYPEOFF (4)
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#define OTHEROFF (5)
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#define DESCOFF (6)
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#define VALOFF (8)
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#define STABSIZE (12)
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struct known_symbol
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{
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const char *name;
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uintptr_t addr;
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size_t size;
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uintmax_t ticks;
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};
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struct shobj
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{
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const char *name; /* User-provided name. */
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struct link_map *map;
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const char *strtab; /* String table of shared object. */
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const char *soname; /* Soname of shared object. */
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uintptr_t lowpc;
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uintptr_t highpc;
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unsigned long int kcountsize;
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size_t expected_size; /* Expected size of profiling file. */
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size_t tossize;
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size_t fromssize;
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size_t fromlimit;
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unsigned int hashfraction;
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int s_scale;
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void *stab_map;
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size_t stab_mapsize;
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const char *stab;
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size_t stab_size;
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const char *stabstr;
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size_t stabstr_size;
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struct obstack ob_str;
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struct obstack ob_sym;
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};
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struct profdata
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{
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void *addr;
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off_t size;
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char *hist;
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uint16_t *kcount;
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uint32_t narcs; /* Number of arcs in toset. */
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struct here_cg_arc_record *data;
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uint16_t *tos;
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struct here_fromstruct *froms;
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};
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/* Search tree for symbols. */
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void *symroot;
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static struct known_symbol **sortsym;
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static size_t symidx;
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static uintmax_t total_ticks;
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/* Prototypes for local functions. */
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static struct shobj *load_shobj (const char *name);
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static void unload_shobj (struct shobj *shobj);
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static struct profdata *load_profdata (const char *name, struct shobj *shobj);
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static void unload_profdata (struct profdata *profdata);
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static void count_total_ticks (struct shobj *shobj, struct profdata *profdata);
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static void read_symbols (struct shobj *shobj);
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int
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main (int argc, char *argv[])
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{
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const char *shobj;
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const char *profdata;
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struct shobj *shobj_handle;
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struct profdata *profdata_handle;
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int remaining;
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setlocale (LC_ALL, "");
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/* Initialize the message catalog. */
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textdomain (_libc_intl_domainname);
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/* Parse and process arguments. */
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argp_parse (&argp, argc, argv, 0, &remaining, NULL);
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if (argc - remaining == 0 || argc - remaining > 2)
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{
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/* We need exactly two non-option parameter. */
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argp_help (&argp, stdout, ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR,
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program_invocation_short_name);
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exit (1);
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}
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/* Get parameters. */
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shobj = argv[remaining];
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if (argc - remaining == 2)
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profdata = argv[remaining + 1];
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else
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/* No filename for the profiling data given. We will determine it
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from the soname of the shobj, later. */
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profdata = NULL;
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/* First see whether we can load the shared object. */
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shobj_handle = load_shobj (shobj);
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if (shobj_handle == NULL)
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exit (1);
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/* We can now determine the filename for the profiling data, if
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nececessary. */
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if (profdata == NULL)
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{
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char *newp;
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if (shobj_handle->soname == NULL)
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{
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unload_shobj (shobj_handle);
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error (EXIT_FAILURE, 0, _("\
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no filename for profiling data given and shared object `%s' has no soname"),
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shobj);
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}
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newp = (char *) alloca (strlen (shobj_handle->soname)
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+ sizeof ".profile");
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stpcpy (stpcpy (newp, shobj_handle->soname), ".profile");
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profdata = newp;
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}
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/* Now see whether the profiling data file matches the given object. */
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profdata_handle = load_profdata (profdata, shobj_handle);
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if (profdata_handle == NULL)
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{
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unload_shobj (shobj_handle);
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exit (1);
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}
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read_symbols (shobj_handle);
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/* Do some work. */
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switch (mode)
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{
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case COUNT_TOTAL:
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count_total_ticks (shobj_handle, profdata_handle);
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{
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size_t n;
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for (n = 0; n < symidx; ++n)
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if (sortsym[n]->ticks != 0)
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printf ("Name: %-30s, Ticks: %" PRIdMAX "\n", sortsym[n]->name,
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sortsym[n]->ticks);
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printf ("Total ticks: %" PRIdMAX "\n", total_ticks);
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}
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break;
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case NONE:
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/* Do nothing. */
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break;
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default:
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assert (! "Internal error");
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}
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/* Free the resources. */
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unload_shobj (shobj_handle);
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unload_profdata (profdata_handle);
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return 0;
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}
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/* Handle program arguments. */
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static error_t
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parse_opt (int key, char *arg, struct argp_state *state)
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{
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switch (key)
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{
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case OPT_COUNT_TOTAL:
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mode = COUNT_TOTAL;
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break;
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case OPT_TEST:
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do_test = 1;
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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/* Print the version information. */
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static void
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print_version (FILE *stream, struct argp_state *state)
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{
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fprintf (stream, "sprof (GNU %s) %s\n", PACKAGE, VERSION);
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fprintf (stream, gettext ("\
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Copyright (C) %s Free Software Foundation, Inc.\n\
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This is free software; see the source for copying conditions. There is NO\n\
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
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"),
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"1997, 1998");
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fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
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}
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/* Note that we must not use `dlopen' etc. The shobj object must not
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be loaded for use. */
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static struct shobj *
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load_shobj (const char *name)
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{
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struct link_map *map = NULL;
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struct shobj *result;
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ElfW(Addr) mapstart = ~((ElfW(Addr)) 0);
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ElfW(Addr) mapend = 0;
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const ElfW(Phdr) *ph;
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size_t textsize;
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unsigned int log_hashfraction;
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ElfW(Ehdr) *ehdr;
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int fd;
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ElfW(Shdr) *shdr;
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void *ptr;
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size_t pagesize = getpagesize ();
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const char *shstrtab;
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int idx;
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ElfW(Shdr) *stab_entry;
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ElfW(Shdr) *stabstr_entry;
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/* Since we use dlopen() we must be prepared to work around the sometimes
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strange lookup rules for the shared objects. If we have a file foo.so
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in the current directory and the user specfies foo.so on the command
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line (without specifying a directory) we should load the file in the
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current directory even if a normal dlopen() call would read the other
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file. We do this by adding a directory portion to the name. */
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if (strchr (name, '/') == NULL)
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{
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char *load_name = (char *) alloca (strlen (name) + 3);
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stpcpy (stpcpy (load_name, "./"), name);
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map = (struct link_map *) dlopen (load_name, RTLD_LAZY);
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}
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if (map == NULL)
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{
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map = (struct link_map *) dlopen (name, RTLD_LAZY);
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if (map == NULL)
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{
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error (0, errno, _("failed to load shared object `%s'"), name);
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return NULL;
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}
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}
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/* Prepare the result. */
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result = (struct shobj *) calloc (1, sizeof (struct shobj));
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if (result == NULL)
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{
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error (0, errno, _("cannot create internal descriptors"));
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dlclose (map);
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return NULL;
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}
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result->name = name;
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result->map = map;
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/* Compute the size of the sections which contain program code.
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This must match the code in dl-profile.c (_dl_start_profile). */
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for (ph = map->l_phdr; ph < &map->l_phdr[map->l_phnum]; ++ph)
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if (ph->p_type == PT_LOAD && (ph->p_flags & PF_X))
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{
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ElfW(Addr) start = (ph->p_vaddr & ~(_dl_pagesize - 1));
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ElfW(Addr) end = ((ph->p_vaddr + ph->p_memsz + _dl_pagesize - 1)
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& ~(_dl_pagesize - 1));
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if (start < mapstart)
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mapstart = start;
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if (end > mapend)
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mapend = end;
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}
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result->lowpc = ROUNDDOWN ((uintptr_t) (mapstart + map->l_addr),
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HISTFRACTION * sizeof (HISTCOUNTER));
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result->highpc = ROUNDUP ((uintptr_t) (mapend + map->l_addr),
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HISTFRACTION * sizeof (HISTCOUNTER));
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if (do_test)
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printf ("load addr: %0#*" PRIxPTR "\n"
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"lower bound PC: %0#*" PRIxPTR "\n"
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"upper bound PC: %0#*" PRIxPTR "\n",
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__ELF_NATIVE_CLASS == 32 ? 10 : 18, map->l_addr,
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__ELF_NATIVE_CLASS == 32 ? 10 : 18, result->lowpc,
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__ELF_NATIVE_CLASS == 32 ? 10 : 18, result->highpc);
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textsize = result->highpc - result->lowpc;
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result->kcountsize = textsize / HISTFRACTION;
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result->hashfraction = HASHFRACTION;
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if ((HASHFRACTION & (HASHFRACTION - 1)) == 0)
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/* If HASHFRACTION is a power of two, mcount can use shifting
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instead of integer division. Precompute shift amount. */
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log_hashfraction = __builtin_ffs (result->hashfraction
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* sizeof (struct here_fromstruct)) - 1;
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else
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log_hashfraction = -1;
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if (do_test)
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printf ("hashfraction = %d\ndivider = %d\n",
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result->hashfraction,
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result->hashfraction * sizeof (struct here_fromstruct));
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result->tossize = textsize / HASHFRACTION;
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result->fromlimit = textsize * ARCDENSITY / 100;
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if (result->fromlimit < MINARCS)
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result->fromlimit = MINARCS;
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if (result->fromlimit > MAXARCS)
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result->fromlimit = MAXARCS;
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result->fromssize = result->fromlimit * sizeof (struct here_fromstruct);
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result->expected_size = (sizeof (struct gmon_hdr)
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+ 4 + sizeof (struct gmon_hist_hdr)
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+ result->kcountsize
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+ 4 + 4
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+ (result->fromssize
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* sizeof (struct here_cg_arc_record)));
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if (do_test)
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printf ("expected size: %Zd\n", result->expected_size);
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#define SCALE_1_TO_1 0x10000L
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if (result->kcountsize < result->highpc - result->lowpc)
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{
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size_t range = result->highpc - result->lowpc;
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size_t quot = range / result->kcountsize;
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if (quot >= SCALE_1_TO_1)
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result->s_scale = 1;
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else if (quot >= SCALE_1_TO_1 / 256)
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result->s_scale = SCALE_1_TO_1 / quot;
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else if (range > ULONG_MAX / 256)
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result->s_scale = ((SCALE_1_TO_1 * 256)
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/ (range / (result->kcountsize / 256)));
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else
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result->s_scale = ((SCALE_1_TO_1 * 256)
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/ ((range * 256) / result->kcountsize));
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}
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else
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result->s_scale = SCALE_1_TO_1;
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if (do_test)
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printf ("s_scale: %d\n", result->s_scale);
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/* Determine the string table. */
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if (map->l_info[DT_STRTAB] == NULL)
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result->strtab = NULL;
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else
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result->strtab = (const char *) (map->l_addr
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+ map->l_info[DT_STRTAB]->d_un.d_ptr);
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if (do_test)
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printf ("string table: %p\n", result->strtab);
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/* Determine the soname. */
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if (map->l_info[DT_SONAME] == NULL)
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result->soname = NULL;
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else
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result->soname = result->strtab + map->l_info[DT_SONAME]->d_un.d_val;
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if (do_test)
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printf ("soname: %s\n", result->soname);
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/* Now the hard part, we have to load the debugging data. For now
|
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we support stabs only.
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|
|
First load the section header table. */
|
|
ehdr = (ElfW(Ehdr) *) map->l_addr;
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|
|
/* Make sure we are on the right party. */
|
|
if (ehdr->e_shentsize != sizeof (ElfW(Shdr)))
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abort ();
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|
|
/* And we need the shared object file descriptor again. */
|
|
fd = open (map->l_name, O_RDONLY);
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if (fd == -1)
|
|
/* Dooh, this really shouldn't happen. We know the file is available. */
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|
error (EXIT_FAILURE, errno, _("Reopening shared object `%s' failed"));
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|
|
/* Now map the section header. */
|
|
ptr = mmap (NULL, (ehdr->e_phnum * sizeof (ElfW(Shdr))
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|
+ (ehdr->e_shoff & (pagesize - 1))), PROT_READ,
|
|
MAP_SHARED|MAP_FILE, fd, ehdr->e_shoff & ~(pagesize - 1));
|
|
if (ptr == MAP_FAILED)
|
|
error (EXIT_FAILURE, errno, _("mapping of section headers failed"));
|
|
shdr = (ElfW(Shdr) *) ((char *) ptr + (ehdr->e_shoff & (pagesize - 1)));
|
|
|
|
/* Get the section header string table. */
|
|
ptr = mmap (NULL, (shdr[ehdr->e_shstrndx].sh_size
|
|
+ (shdr[ehdr->e_shstrndx].sh_offset & (pagesize - 1))),
|
|
PROT_READ, MAP_SHARED|MAP_FILE, fd,
|
|
shdr[ehdr->e_shstrndx].sh_offset & ~(pagesize - 1));
|
|
if (ptr == MAP_FAILED)
|
|
error (EXIT_FAILURE, errno,
|
|
_("mapping of section header string table failed"));
|
|
shstrtab = ((const char *) ptr
|
|
+ (shdr[ehdr->e_shstrndx].sh_offset & (pagesize - 1)));
|
|
|
|
/* Search for the ".stab" and ".stabstr" section (and ".rel.stab" ?). */
|
|
stab_entry = NULL;
|
|
stabstr_entry = NULL;
|
|
for (idx = 0; idx < ehdr->e_shnum; ++idx)
|
|
/* We only have to look for sections which are not loaded. */
|
|
if (shdr[idx].sh_addr == 0)
|
|
{
|
|
if (strcmp (shstrtab + shdr[idx].sh_name, ".stab") == 0)
|
|
stab_entry = &shdr[idx];
|
|
else if (strcmp (shstrtab + shdr[idx].sh_name, ".stabstr") == 0)
|
|
stabstr_entry = &shdr[idx];
|
|
}
|
|
|
|
/* We don't need the sectin header string table anymore. */
|
|
munmap (ptr, (shdr[ehdr->e_shstrndx].sh_size
|
|
+ (shdr[ehdr->e_shstrndx].sh_offset & (pagesize - 1))));
|
|
|
|
if (stab_entry == NULL || stabstr_entry == NULL)
|
|
{
|
|
fprintf (stderr, _("\
|
|
*** The file `%s' is stripped: no detailed analysis possible\n"),
|
|
name);
|
|
result->stab = NULL;
|
|
result->stabstr = NULL;
|
|
}
|
|
else
|
|
{
|
|
if (stab_entry->sh_offset + stab_entry->sh_size
|
|
!= stabstr_entry->sh_offset)
|
|
abort ();
|
|
if (stab_entry->sh_size % STABSIZE != 0)
|
|
abort ();
|
|
|
|
result->stab_map = mmap (NULL, (stab_entry->sh_size
|
|
+ stabstr_entry->sh_size
|
|
+ (stab_entry->sh_offset
|
|
& (pagesize - 1))),
|
|
PROT_READ, MAP_SHARED|MAP_FILE, fd,
|
|
stab_entry->sh_offset & ~(pagesize - 1));
|
|
if (result->stab_map == NULL)
|
|
error (EXIT_FAILURE, errno, _("failed to load stab data:"));
|
|
|
|
result->stab = ((const char *) result->stab_map
|
|
+ (stab_entry->sh_offset & (pagesize - 1)));
|
|
result->stab_size = stab_entry->sh_size;
|
|
result->stabstr = result->stab + stab_entry->sh_size;
|
|
result->stabstr_size = stabstr_entry->sh_size;
|
|
result->stab_mapsize = (stab_entry->sh_size + stabstr_entry->sh_size
|
|
+ (stab_entry->sh_offset & (pagesize - 1)));
|
|
}
|
|
|
|
/* Now we also don't need the sectio header table anymore. */
|
|
munmap ((char *) shdr - (ehdr->e_shoff & (pagesize - 1)),
|
|
(ehdr->e_phnum * sizeof (ElfW(Shdr))
|
|
+ (ehdr->e_shoff & (pagesize - 1))));
|
|
|
|
/* Free the descriptor for the shared object. */
|
|
close (fd);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static void
|
|
unload_shobj (struct shobj *shobj)
|
|
{
|
|
munmap (shobj->stab_map, shobj->stab_mapsize);
|
|
dlclose (shobj->map);
|
|
}
|
|
|
|
|
|
static struct profdata *
|
|
load_profdata (const char *name, struct shobj *shobj)
|
|
{
|
|
struct profdata *result;
|
|
int fd;
|
|
struct stat st;
|
|
void *addr;
|
|
struct gmon_hdr gmon_hdr;
|
|
struct gmon_hist_hdr hist_hdr;
|
|
uint32_t *narcsp;
|
|
size_t fromlimit;
|
|
struct here_cg_arc_record *data;
|
|
struct here_fromstruct *froms;
|
|
uint16_t *tos;
|
|
size_t fromidx;
|
|
size_t idx;
|
|
|
|
fd = open (name, O_RDONLY);
|
|
if (fd == -1)
|
|
{
|
|
char *ext_name;
|
|
|
|
if (errno != ENOENT || strchr (name, '/') != NULL)
|
|
/* The file exists but we are not allowed to read it or the
|
|
file does not exist and the name includes a path
|
|
specification.. */
|
|
return NULL;
|
|
|
|
/* A file with the given name does not exist in the current
|
|
directory, try it in the default location where the profiling
|
|
files are created. */
|
|
ext_name = (char *) alloca (strlen (name) + sizeof "/var/tmp/");
|
|
stpcpy (stpcpy (ext_name, "/var/tmp/"), name);
|
|
name = ext_name;
|
|
|
|
fd = open (ext_name, O_RDONLY);
|
|
if (fd == -1)
|
|
{
|
|
/* Even this file does not exist. */
|
|
error (0, errno, _("cannot load profiling data"));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* We have found the file, now make sure it is the right one for the
|
|
data file. */
|
|
if (fstat (fd, &st) < 0)
|
|
{
|
|
error (0, errno, _("while stat'ing profiling data file"));
|
|
close (fd);
|
|
return NULL;
|
|
}
|
|
|
|
if (st.st_size != shobj->expected_size)
|
|
{
|
|
error (0, 0, _("profiling data file `%s' does match shared object `%s'"),
|
|
name, shobj->name);
|
|
close (fd);
|
|
return NULL;
|
|
}
|
|
|
|
/* The data file is most probably the right one for our shared
|
|
object. Map it now. */
|
|
addr = mmap (NULL, st.st_size, PROT_READ, MAP_SHARED|MAP_FILE, fd, 0);
|
|
if (addr == MAP_FAILED)
|
|
{
|
|
error (0, errno, _("failed to mmap the profiling data file"));
|
|
close (fd);
|
|
return NULL;
|
|
}
|
|
|
|
/* We don't need the file desriptor anymore. */
|
|
if (close (fd) < 0)
|
|
{
|
|
error (0, errno, _("error while closing the profiling data file"));
|
|
munmap (addr, st.st_size);
|
|
return NULL;
|
|
}
|
|
|
|
/* Prepare the result. */
|
|
result = (struct profdata *) calloc (1, sizeof (struct profdata));
|
|
if (result == NULL)
|
|
{
|
|
error (0, errno, _("cannot create internal descriptor"));
|
|
munmap (addr, st.st_size);
|
|
return NULL;
|
|
}
|
|
|
|
/* Store the address and size so that we can later free the resources. */
|
|
result->addr = addr;
|
|
result->size = st.st_size;
|
|
|
|
/* Pointer to data after the header. */
|
|
result->hist = (char *) ((struct gmon_hdr *) addr + 1);
|
|
result->kcount = (uint16_t *) ((char *) result->hist + sizeof (uint32_t)
|
|
+ sizeof (struct gmon_hist_hdr));
|
|
|
|
/* Compute pointer to array of the arc information. */
|
|
narcsp = (uint32_t *) ((char *) result->kcount + shobj->kcountsize
|
|
+ sizeof (uint32_t));
|
|
result->narcs = *narcsp;
|
|
result->data = (struct here_cg_arc_record *) ((char *) narcsp
|
|
+ sizeof (uint32_t));
|
|
|
|
/* Create the gmon_hdr we expect or write. */
|
|
memset (&gmon_hdr, '\0', sizeof (struct gmon_hdr));
|
|
memcpy (&gmon_hdr.cookie[0], GMON_MAGIC, sizeof (gmon_hdr.cookie));
|
|
*(int32_t *) gmon_hdr.version = GMON_SHOBJ_VERSION;
|
|
|
|
/* Create the hist_hdr we expect or write. */
|
|
*(char **) hist_hdr.low_pc = (char *) shobj->lowpc - shobj->map->l_addr;
|
|
*(char **) hist_hdr.high_pc = (char *) shobj->highpc - shobj->map->l_addr;
|
|
if (do_test)
|
|
printf ("low_pc = %p\nhigh_pc = %p\n",
|
|
hist_hdr.low_pc, hist_hdr.high_pc);
|
|
*(int32_t *) hist_hdr.hist_size = shobj->kcountsize / sizeof (HISTCOUNTER);
|
|
*(int32_t *) hist_hdr.prof_rate = __profile_frequency ();
|
|
strncpy (hist_hdr.dimen, "seconds", sizeof (hist_hdr.dimen));
|
|
hist_hdr.dimen_abbrev = 's';
|
|
|
|
/* Test whether the header of the profiling data is ok. */
|
|
if (memcmp (addr, &gmon_hdr, sizeof (struct gmon_hdr)) != 0
|
|
|| *(uint32_t *) result->hist != GMON_TAG_TIME_HIST
|
|
|| memcmp (result->hist + sizeof (uint32_t), &hist_hdr,
|
|
sizeof (struct gmon_hist_hdr)) != 0
|
|
|| narcsp[-1] != GMON_TAG_CG_ARC)
|
|
{
|
|
free (result);
|
|
error (0, 0, _("`%s' is no correct profile data file for `%s'"),
|
|
name, shobj->name);
|
|
munmap (addr, st.st_size);
|
|
return NULL;
|
|
}
|
|
|
|
/* We are pretty sure now that this is a correct input file. Set up
|
|
the remaining information in the result structure and return. */
|
|
result->tos = (uint16_t *) calloc (shobj->tossize + shobj->fromssize, 1);
|
|
if (result->tos == NULL)
|
|
{
|
|
error (0, errno, _("cannot create internal descriptor"));
|
|
munmap (addr, st.st_size);
|
|
free (result);
|
|
return NULL;
|
|
}
|
|
|
|
result->froms = (struct here_fromstruct *) ((char *) result->tos
|
|
+ shobj->tossize);
|
|
fromidx = 0;
|
|
|
|
/* Now we have to process all the arc count entries. */
|
|
fromlimit = shobj->fromlimit;
|
|
data = result->data;
|
|
froms = result->froms;
|
|
tos = result->tos;
|
|
for (idx = 0; idx < MIN (*narcsp, fromlimit); ++idx)
|
|
{
|
|
size_t to_index;
|
|
size_t newfromidx;
|
|
to_index = (data[idx].self_pc / (shobj->hashfraction * sizeof (*tos)));
|
|
newfromidx = fromidx++;
|
|
froms[newfromidx].here = &data[idx];
|
|
froms[newfromidx].link = tos[to_index];
|
|
tos[to_index] = newfromidx;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static void
|
|
unload_profdata (struct profdata *profdata)
|
|
{
|
|
free (profdata->tos);
|
|
munmap (profdata->addr, profdata->size);
|
|
free (profdata);
|
|
}
|
|
|
|
|
|
static void
|
|
count_total_ticks (struct shobj *shobj, struct profdata *profdata)
|
|
{
|
|
volatile uint16_t *kcount = profdata->kcount;
|
|
size_t maxkidx = shobj->kcountsize;
|
|
size_t factor = 2 * (65536 / shobj->s_scale);
|
|
size_t kidx = 0;
|
|
size_t sidx = 0;
|
|
|
|
while (sidx < symidx)
|
|
{
|
|
uintptr_t start = sortsym[sidx]->addr;
|
|
uintptr_t end = start + sortsym[sidx]->size;
|
|
|
|
while (kidx < maxkidx && factor * kidx < start)
|
|
++kidx;
|
|
if (kidx == maxkidx)
|
|
break;
|
|
|
|
while (kidx < maxkidx && factor * kidx < end)
|
|
sortsym[sidx]->ticks += kcount[kidx++];
|
|
if (kidx == maxkidx)
|
|
break;
|
|
|
|
total_ticks += sortsym[sidx++]->ticks;
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
symorder (const void *o1, const void *o2)
|
|
{
|
|
const struct known_symbol *p1 = (struct known_symbol *) o1;
|
|
const struct known_symbol *p2 = (struct known_symbol *) o2;
|
|
|
|
return p1->addr - p2->addr;
|
|
}
|
|
|
|
|
|
static void
|
|
printsym (const void *node, VISIT value, int level)
|
|
{
|
|
if (value == leaf || value == postorder)
|
|
sortsym[symidx++] = *(const struct known_symbol **) node;
|
|
}
|
|
|
|
|
|
static void
|
|
read_symbols (struct shobj *shobj)
|
|
{
|
|
void *load_addr = (void *) shobj->map->l_addr;
|
|
int n = 0;
|
|
int idx;
|
|
const char *last_name = NULL;
|
|
uintptr_t last_addr = 0;
|
|
|
|
/* Initialize the obstacks. */
|
|
#define obstack_chunk_alloc malloc
|
|
#define obstack_chunk_free free
|
|
obstack_init (&shobj->ob_str);
|
|
obstack_init (&shobj->ob_sym);
|
|
|
|
/* Process the stabs. */
|
|
for (idx = 0; idx < shobj->stab_size; idx += 12)
|
|
if (*(shobj->stab + idx + TYPEOFF) == N_FUN)
|
|
{
|
|
const char *str = (shobj->stabstr
|
|
+ *((uint32_t *) (shobj->stab + idx + STRDXOFF)));
|
|
|
|
if (*str != '\0')
|
|
{
|
|
last_name = str;
|
|
last_addr = *((uint32_t *) (shobj->stab + idx + VALOFF));
|
|
}
|
|
else
|
|
{
|
|
const char *endp;
|
|
char *name0;
|
|
struct known_symbol *newsym;
|
|
|
|
if (last_name == NULL)
|
|
abort ();
|
|
|
|
endp = strchr (last_name, ':');
|
|
|
|
name0 = (char *) obstack_copy0 (&shobj->ob_str, last_name,
|
|
endp - last_name);
|
|
if (name0 != NULL)
|
|
newsym =
|
|
(struct known_symbol *) obstack_alloc (&shobj->ob_sym,
|
|
sizeof (*newsym));
|
|
else
|
|
/* Keep the stupid compiler happy. */
|
|
newsym = NULL;
|
|
if (name0 == NULL || newsym == NULL)
|
|
error (EXIT_FAILURE, errno, _("cannot allocate symbol data"));
|
|
|
|
newsym->name = name0;
|
|
newsym->addr = last_addr;
|
|
newsym->size = *((uint32_t *) (shobj->stab + idx + VALOFF));
|
|
newsym->ticks = 0;
|
|
|
|
tsearch (newsym, &symroot, symorder);
|
|
++n;
|
|
|
|
last_name = NULL;
|
|
last_addr = 0;
|
|
}
|
|
}
|
|
|
|
if (shobj->stab == NULL)
|
|
{
|
|
/* Blarg, the binary is stripped. We have to rely on the
|
|
information contained in the dynamic section of the object. */
|
|
const ElfW(Sym) *symtab = (load_addr
|
|
+ shobj->map->l_info[DT_SYMTAB]->d_un.d_ptr);
|
|
const char *strtab = (load_addr
|
|
+ shobj->map->l_info[DT_STRTAB]->d_un.d_ptr);
|
|
|
|
/* We assume that the string table follows the symbol table,
|
|
because there is no way in ELF to know the size of the
|
|
dynamic symbol table!! */
|
|
while ((void *) symtab < (void *) strtab)
|
|
{
|
|
if (/*(ELFW(ST_TYPE)(symtab->st_info) == STT_FUNC
|
|
|| ELFW(ST_TYPE)(symtab->st_info) == STT_NOTYPE)
|
|
&&*/ symtab->st_size != 0)
|
|
{
|
|
struct known_symbol *newsym;
|
|
|
|
newsym =
|
|
(struct known_symbol *) obstack_alloc (&shobj->ob_sym,
|
|
sizeof (*newsym));
|
|
if (newsym == NULL)
|
|
error (EXIT_FAILURE, errno, _("cannot allocate symbol data"));
|
|
|
|
newsym->name = &strtab[symtab->st_name];
|
|
newsym->addr = symtab->st_value;
|
|
newsym->size = symtab->st_size;
|
|
newsym->ticks = 0;
|
|
|
|
tsearch (newsym, &symroot, symorder);
|
|
++n;
|
|
}
|
|
}
|
|
|
|
++symtab;
|
|
}
|
|
|
|
sortsym = malloc (n * sizeof (struct known_symbol *));
|
|
if (sortsym == NULL)
|
|
abort ();
|
|
|
|
twalk (symroot, printsym);
|
|
}
|