98 lines
1.7 KiB
C
98 lines
1.7 KiB
C
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#include "event.h"
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#include "symbol.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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static inline int is_anon_memory(const char *filename)
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{
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return strcmp(filename, "//anon") == 0;
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}
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static int strcommon(const char *pathname, char *cwd, int cwdlen)
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{
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int n = 0;
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while (n < cwdlen && pathname[n] == cwd[n])
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++n;
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return n;
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}
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struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen)
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{
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struct map *self = malloc(sizeof(*self));
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if (self != NULL) {
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const char *filename = event->filename;
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char newfilename[PATH_MAX];
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int anon;
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if (cwd) {
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int n = strcommon(filename, cwd, cwdlen);
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if (n == cwdlen) {
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snprintf(newfilename, sizeof(newfilename),
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".%s", filename + n);
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filename = newfilename;
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}
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}
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anon = is_anon_memory(filename);
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if (anon) {
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snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
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filename = newfilename;
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}
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self->start = event->start;
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self->end = event->start + event->len;
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self->pgoff = event->pgoff;
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self->dso = dsos__findnew(filename);
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if (self->dso == NULL)
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goto out_delete;
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if (self->dso == vdso || anon)
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self->map_ip = vdso__map_ip;
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else
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self->map_ip = map__map_ip;
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}
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return self;
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out_delete:
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free(self);
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return NULL;
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}
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struct map *map__clone(struct map *self)
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{
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struct map *map = malloc(sizeof(*self));
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if (!map)
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return NULL;
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memcpy(map, self, sizeof(*self));
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return map;
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}
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int map__overlap(struct map *l, struct map *r)
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{
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if (l->start > r->start) {
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struct map *t = l;
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l = r;
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r = t;
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}
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if (l->end > r->start)
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return 1;
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return 0;
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}
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size_t map__fprintf(struct map *self, FILE *fp)
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{
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return fprintf(fp, " %Lx-%Lx %Lx %s\n",
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self->start, self->end, self->pgoff, self->dso->name);
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}
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