6b82eae556
With some of the options in pfunct, such as: [acme@newtoy guinea_pig-2.6]$ pahole --sizes kernel/sched.o | sort -k2 -nr | head -5 pglist_data: 3456 task_struct: 2704 rq: 2480 mmu_gather: 2040 zone: 1664 [acme@newtoy guinea_pig-2.6]$ Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
/*
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Copyright (C) 2006 Mandriva Conectiva S.A.
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Copyright (C) 2006 Arnaldo Carvalho de Melo <acme@mandriva.com>
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This program is free software; you can redistribute it and/or modify it
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under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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*/
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#include <getopt.h>
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#include <stdio.h>
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#include <dwarf.h>
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#include <stdlib.h>
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#include "classes.h"
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static struct option long_options[] = {
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{ "class_name_len", no_argument, NULL, 'N' },
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{ "help", no_argument, NULL, 'h' },
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{ "nr_members", no_argument, NULL, 'n' },
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{ "sizes", no_argument, NULL, 's' },
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{ NULL, 0, NULL, 0, }
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};
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static void usage(void)
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{
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fprintf(stderr,
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"usage: pfunct [options] <file_name> {<function_name>}\n"
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" where: \n"
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" -h, --help show usage info\n"
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" -N, --class_name_len show size of classes\n"
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" -s, --sizes show size of classes\n"
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" -m, --nr_members show number of members in classes\n");
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}
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static int nr_members_iterator(struct cu *cu, struct class *class, void *cookie)
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{
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if (class->tag != DW_TAG_structure_type)
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return 0;
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if (class->nr_members > 0 && class->name != NULL)
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printf("%s: %u\n", class->name, class->nr_members);
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return 0;
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}
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static int cu_nr_members_iterator(struct cu *cu, void *cookie)
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{
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return cu__for_each_class(cu, nr_members_iterator, cookie);
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}
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static int sizes_iterator(struct cu *cu, struct class *class, void *cookie)
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{
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if (class->tag != DW_TAG_structure_type)
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return 0;
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if (class->name != NULL && class->size > 0)
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printf("%s: %u\n", class->name, class->size);
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return 0;
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}
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static int cu_sizes_iterator(struct cu *cu, void *cookie)
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{
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return cu__for_each_class(cu, sizes_iterator, cookie);
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}
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int main(int argc, char *argv[])
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{
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int option, option_index;
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char *file_name;
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char *class_name = NULL;
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int show_sizes = 0;
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int show_nr_members = 0;
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int show_class_name_len = 0;
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while ((option = getopt_long(argc, argv, "hnNs",
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long_options, &option_index)) >= 0)
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switch (option) {
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case 's': show_sizes = 1; break;
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case 'n': show_nr_members = 1; break;
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case 'N': show_class_name_len = 1; break;
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case 'h': usage(); return EXIT_SUCCESS;
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default: usage(); return EXIT_FAILURE;
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}
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if (optind < argc) {
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switch (argc - optind) {
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case 1: file_name = argv[optind++]; break;
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case 2: file_name = argv[optind++];
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class_name = argv[optind++]; break;
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default: usage(); return EXIT_FAILURE;
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}
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}
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if (classes__load(file_name) != 0) {
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fprintf(stderr, "pahole: couldn't load DWARF info from %s\n",
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file_name);
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return EXIT_FAILURE;
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}
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if (show_nr_members)
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cus__for_each_cu(cu_nr_members_iterator, NULL);
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else if (show_sizes)
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cus__for_each_cu(cu_sizes_iterator, NULL);
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else if (class_name != NULL) {
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struct cu *cu;
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struct class *class = cus__find_class_by_name(&cu, class_name);
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if (class != NULL) {
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class__find_holes(class, cu);
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class__print(class, cu);
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} else
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printf("struct %s not found!\n", class_name);
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} else
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classes__print(DW_TAG_structure_type);
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return EXIT_SUCCESS;
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}
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