Commit | Line | Data |
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ef368dac NC |
1 | /* call_graph.c - Create call graphs. |
2 | ||
219d1afa | 3 | Copyright (C) 1999-2018 Free Software Foundation, Inc. |
ef368dac NC |
4 | |
5 | This file is part of GNU Binutils. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
651dbc76 | 9 | the Free Software Foundation; either version 3 of the License, or |
ef368dac NC |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
44eb1801 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
ef368dac | 21 | \f |
6d9c411a AM |
22 | #include "gprof.h" |
23 | #include "search_list.h" | |
24 | #include "source.h" | |
25 | #include "symtab.h" | |
252b5132 RH |
26 | #include "cg_arcs.h" |
27 | #include "call_graph.h" | |
28 | #include "corefile.h" | |
29 | #include "gmon_io.h" | |
30 | #include "gmon_out.h" | |
252b5132 RH |
31 | #include "sym_ids.h" |
32 | ||
1355568a | 33 | void |
3e8f6abf | 34 | cg_tally (bfd_vma from_pc, bfd_vma self_pc, unsigned long count) |
252b5132 RH |
35 | { |
36 | Sym *parent; | |
37 | Sym *child; | |
38 | ||
39 | parent = sym_lookup (&symtab, from_pc); | |
40 | child = sym_lookup (&symtab, self_pc); | |
41 | ||
42 | if (child == NULL || parent == NULL) | |
43 | return; | |
44 | ||
45 | /* If we're doing line-by-line profiling, both the parent and the | |
46 | child will probably point to line symbols instead of function | |
47 | symbols. For the parent this is fine, since this identifies the | |
48 | line number in the calling routing, but the child should always | |
49 | point to a function entry point, so we back up in the symbol | |
50 | table until we find it. | |
0eee5820 | 51 | |
252b5132 RH |
52 | For normal profiling, is_func will be set on all symbols, so this |
53 | code will do nothing. */ | |
252b5132 RH |
54 | while (child >= symtab.base && ! child->is_func) |
55 | --child; | |
56 | ||
57 | if (child < symtab.base) | |
58 | return; | |
59 | ||
ef368dac NC |
60 | /* Keep arc if it is on INCL_ARCS table or if the INCL_ARCS table |
61 | is empty and it is not in the EXCL_ARCS table. */ | |
252b5132 RH |
62 | if (sym_id_arc_is_present (&syms[INCL_ARCS], parent, child) |
63 | || (syms[INCL_ARCS].len == 0 | |
64 | && !sym_id_arc_is_present (&syms[EXCL_ARCS], parent, child))) | |
65 | { | |
66 | child->ncalls += count; | |
67 | DBG (TALLYDEBUG, | |
68 | printf (_("[cg_tally] arc from %s to %s traversed %lu times\n"), | |
69 | parent->name, child->name, count)); | |
70 | arc_add (parent, child, count); | |
71 | } | |
72 | } | |
73 | ||
ef368dac NC |
74 | /* Read a record from file IFP describing an arc in the function |
75 | call-graph and the count of how many times the arc has been | |
76 | traversed. FILENAME is the name of file IFP and is provided | |
77 | for formatting error-messages only. */ | |
252b5132 | 78 | |
252b5132 | 79 | void |
3e8f6abf | 80 | cg_read_rec (FILE *ifp, const char *filename) |
252b5132 RH |
81 | { |
82 | bfd_vma from_pc, self_pc; | |
0eee5820 | 83 | unsigned int count; |
252b5132 | 84 | |
0eee5820 AM |
85 | if (gmon_io_read_vma (ifp, &from_pc) |
86 | || gmon_io_read_vma (ifp, &self_pc) | |
87 | || gmon_io_read_32 (ifp, &count)) | |
252b5132 RH |
88 | { |
89 | fprintf (stderr, _("%s: %s: unexpected end of file\n"), | |
90 | whoami, filename); | |
91 | done (1); | |
92 | } | |
0eee5820 | 93 | |
252b5132 RH |
94 | DBG (SAMPLEDEBUG, |
95 | printf ("[cg_read_rec] frompc 0x%lx selfpc 0x%lx count %lu\n", | |
0eee5820 AM |
96 | (unsigned long) from_pc, (unsigned long) self_pc, |
97 | (unsigned long) count)); | |
ef368dac | 98 | /* Add this arc: */ |
252b5132 RH |
99 | cg_tally (from_pc, self_pc, count); |
100 | } | |
101 | ||
ef368dac NC |
102 | /* Write all the arcs in the call-graph to file OFP. FILENAME is |
103 | the name of OFP and is provided for formatting error-messages | |
104 | only. */ | |
252b5132 | 105 | |
252b5132 | 106 | void |
3e8f6abf | 107 | cg_write_arcs (FILE *ofp, const char *filename) |
252b5132 | 108 | { |
252b5132 RH |
109 | Arc *arc; |
110 | Sym *sym; | |
111 | ||
112 | for (sym = symtab.base; sym < symtab.limit; sym++) | |
113 | { | |
114 | for (arc = sym->cg.children; arc; arc = arc->next_child) | |
115 | { | |
0eee5820 AM |
116 | if (gmon_io_write_8 (ofp, GMON_TAG_CG_ARC) |
117 | || gmon_io_write_vma (ofp, arc->parent->addr) | |
118 | || gmon_io_write_vma (ofp, arc->child->addr) | |
119 | || gmon_io_write_32 (ofp, arc->count)) | |
252b5132 RH |
120 | { |
121 | perror (filename); | |
122 | done (1); | |
123 | } | |
124 | DBG (SAMPLEDEBUG, | |
125 | printf ("[cg_write_arcs] frompc 0x%lx selfpc 0x%lx count %lu\n", | |
fdcf7d43 ILT |
126 | (unsigned long) arc->parent->addr, |
127 | (unsigned long) arc->child->addr, arc->count)); | |
252b5132 RH |
128 | } |
129 | } | |
130 | } |