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b3165f4144
So that we can process two perf.data files. We still need to add a O_MMAP mode for perf_session so that we can do all the mmap stuff in it. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1260741029-4430-5-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
#include <linux/kernel.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include "session.h"
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#include "util.h"
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static int perf_session__open(struct perf_session *self, bool force)
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{
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struct stat input_stat;
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self->fd = open(self->filename, O_RDONLY);
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if (self->fd < 0) {
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pr_err("failed to open file: %s", self->filename);
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if (!strcmp(self->filename, "perf.data"))
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pr_err(" (try 'perf record' first)");
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pr_err("\n");
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return -errno;
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}
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if (fstat(self->fd, &input_stat) < 0)
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goto out_close;
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if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
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pr_err("file %s not owned by current user or root\n",
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self->filename);
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goto out_close;
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}
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if (!input_stat.st_size) {
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pr_info("zero-sized file (%s), nothing to do!\n",
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self->filename);
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goto out_close;
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}
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if (perf_header__read(&self->header, self->fd) < 0) {
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pr_err("incompatible file format");
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goto out_close;
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}
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self->size = input_stat.st_size;
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return 0;
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out_close:
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close(self->fd);
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self->fd = -1;
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return -1;
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}
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struct perf_session *perf_session__new(const char *filename, int mode,
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bool force)
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{
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size_t len = filename ? strlen(filename) + 1 : 0;
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struct perf_session *self = zalloc(sizeof(*self) + len);
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if (self == NULL)
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goto out;
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if (perf_header__init(&self->header) < 0)
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goto out_delete;
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memcpy(self->filename, filename, len);
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self->threads = RB_ROOT;
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self->last_match = NULL;
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self->mmap_window = 32;
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self->cwd = NULL;
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self->cwdlen = 0;
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if (mode == O_RDONLY && perf_session__open(self, force) < 0) {
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perf_session__delete(self);
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self = NULL;
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}
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out:
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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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void perf_session__delete(struct perf_session *self)
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{
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perf_header__exit(&self->header);
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close(self->fd);
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free(self->cwd);
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free(self);
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}
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