blob: 41c5c4a20010edf61da524833e8c64ce88f629ea [file] [log] [blame]
Frederic Weisbecker66e274f2009-08-12 11:07:25 +02001#include "event.h"
2#include "symbol.h"
3#include <stdlib.h>
4#include <string.h>
5#include <stdio.h>
Arnaldo Carvalho de Meloe4204992009-10-20 14:25:40 -02006#include "debug.h"
Frederic Weisbecker66e274f2009-08-12 11:07:25 +02007
8static inline int is_anon_memory(const char *filename)
9{
10 return strcmp(filename, "//anon") == 0;
11}
12
13static int strcommon(const char *pathname, char *cwd, int cwdlen)
14{
15 int n = 0;
16
17 while (n < cwdlen && pathname[n] == cwd[n])
18 ++n;
19
20 return n;
21}
22
Arnaldo Carvalho de Meloafb7b4f2009-10-30 16:28:23 -020023void map__init(struct map *self, u64 start, u64 end, u64 pgoff,
24 struct dso *dso)
25{
26 self->start = start;
27 self->end = end;
28 self->pgoff = pgoff;
29 self->dso = dso;
30 self->map_ip = map__map_ip;
31 self->unmap_ip = map__unmap_ip;
32 RB_CLEAR_NODE(&self->rb_node);
33}
34
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -020035struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen)
Frederic Weisbecker66e274f2009-08-12 11:07:25 +020036{
37 struct map *self = malloc(sizeof(*self));
38
39 if (self != NULL) {
40 const char *filename = event->filename;
41 char newfilename[PATH_MAX];
Arnaldo Carvalho de Meloafb7b4f2009-10-30 16:28:23 -020042 struct dso *dso;
Frederic Weisbecker66e274f2009-08-12 11:07:25 +020043 int anon;
44
45 if (cwd) {
46 int n = strcommon(filename, cwd, cwdlen);
47
48 if (n == cwdlen) {
49 snprintf(newfilename, sizeof(newfilename),
50 ".%s", filename + n);
51 filename = newfilename;
52 }
53 }
54
55 anon = is_anon_memory(filename);
56
57 if (anon) {
58 snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
59 filename = newfilename;
60 }
61
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -020062 dso = dsos__findnew(filename);
Arnaldo Carvalho de Meloafb7b4f2009-10-30 16:28:23 -020063 if (dso == NULL)
Frederic Weisbecker66e274f2009-08-12 11:07:25 +020064 goto out_delete;
65
Arnaldo Carvalho de Meloafb7b4f2009-10-30 16:28:23 -020066 map__init(self, event->start, event->start + event->len,
67 event->pgoff, dso);
68
Frederic Weisbecker66e274f2009-08-12 11:07:25 +020069 if (self->dso == vdso || anon)
Arnaldo Carvalho de Meloed52ce22009-10-19 17:17:57 -020070 self->map_ip = self->unmap_ip = identity__map_ip;
Frederic Weisbecker66e274f2009-08-12 11:07:25 +020071 }
72 return self;
73out_delete:
74 free(self);
75 return NULL;
76}
77
Arnaldo Carvalho de Meloc338aee2009-11-20 20:51:27 -020078void map__delete(struct map *self)
79{
80 free(self);
81}
82
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -020083void map__fixup_start(struct map *self, struct rb_root *symbols)
Arnaldo Carvalho de Meloc338aee2009-11-20 20:51:27 -020084{
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -020085 struct rb_node *nd = rb_first(symbols);
Arnaldo Carvalho de Meloc338aee2009-11-20 20:51:27 -020086 if (nd != NULL) {
87 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
88 self->start = sym->start;
89 }
90}
91
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -020092void map__fixup_end(struct map *self, struct rb_root *symbols)
Arnaldo Carvalho de Meloc338aee2009-11-20 20:51:27 -020093{
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -020094 struct rb_node *nd = rb_last(symbols);
Arnaldo Carvalho de Meloc338aee2009-11-20 20:51:27 -020095 if (nd != NULL) {
96 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
97 self->end = sym->end;
98 }
99}
100
Arnaldo Carvalho de Melod70a5402009-10-30 16:28:25 -0200101#define DSO__DELETED "(deleted)"
102
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -0200103struct symbol *map__find_function(struct map *self, u64 ip,
104 symbol_filter_t filter)
Arnaldo Carvalho de Melo66bd8422009-10-28 21:51:21 -0200105{
106 if (!self->dso->loaded) {
107 int nr = dso__load(self->dso, self, filter);
108
109 if (nr < 0) {
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200110 if (self->dso->has_build_id) {
111 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
112
113 build_id__sprintf(self->dso->build_id,
114 sizeof(self->dso->build_id),
115 sbuild_id);
116 pr_warning("%s with build id %s not found",
117 self->dso->long_name, sbuild_id);
118 } else
119 pr_warning("Failed to open %s",
120 self->dso->long_name);
121 pr_warning(", continuing without symbols\n");
Arnaldo Carvalho de Melo66bd8422009-10-28 21:51:21 -0200122 return NULL;
123 } else if (nr == 0) {
Arnaldo Carvalho de Melod70a5402009-10-30 16:28:25 -0200124 const char *name = self->dso->long_name;
125 const size_t len = strlen(name);
126 const size_t real_len = len - sizeof(DSO__DELETED);
127
128 if (len > sizeof(DSO__DELETED) &&
Ingo Molnar900b20d2009-11-02 19:25:25 +0100129 strcmp(name + real_len + 1, DSO__DELETED) == 0) {
130 pr_warning("%.*s was updated, restart the long running apps that use it!\n",
131 (int)real_len, name);
132 } else {
133 pr_warning("no symbols found in %s, maybe install a debug package?\n", name);
134 }
Arnaldo Carvalho de Melo66bd8422009-10-28 21:51:21 -0200135 return NULL;
136 }
137 }
138
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -0200139 return self->dso->find_function(self->dso, ip);
Arnaldo Carvalho de Melo66bd8422009-10-28 21:51:21 -0200140}
141
Frederic Weisbecker66e274f2009-08-12 11:07:25 +0200142struct map *map__clone(struct map *self)
143{
144 struct map *map = malloc(sizeof(*self));
145
146 if (!map)
147 return NULL;
148
149 memcpy(map, self, sizeof(*self));
150
151 return map;
152}
153
154int map__overlap(struct map *l, struct map *r)
155{
156 if (l->start > r->start) {
157 struct map *t = l;
158 l = r;
159 r = t;
160 }
161
162 if (l->end > r->start)
163 return 1;
164
165 return 0;
166}
167
168size_t map__fprintf(struct map *self, FILE *fp)
169{
170 return fprintf(fp, " %Lx-%Lx %Lx %s\n",
171 self->start, self->end, self->pgoff, self->dso->name);
172}