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94c744b6 ACM |
1 | #include <linux/kernel.h> |
2 | ||
3 | #include <unistd.h> | |
4 | #include <sys/types.h> | |
5 | ||
6 | #include "session.h" | |
a328626b | 7 | #include "sort.h" |
94c744b6 ACM |
8 | #include "util.h" |
9 | ||
10 | static int perf_session__open(struct perf_session *self, bool force) | |
11 | { | |
12 | struct stat input_stat; | |
13 | ||
14 | self->fd = open(self->filename, O_RDONLY); | |
15 | if (self->fd < 0) { | |
16 | pr_err("failed to open file: %s", self->filename); | |
17 | if (!strcmp(self->filename, "perf.data")) | |
18 | pr_err(" (try 'perf record' first)"); | |
19 | pr_err("\n"); | |
20 | return -errno; | |
21 | } | |
22 | ||
23 | if (fstat(self->fd, &input_stat) < 0) | |
24 | goto out_close; | |
25 | ||
26 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
27 | pr_err("file %s not owned by current user or root\n", | |
28 | self->filename); | |
29 | goto out_close; | |
30 | } | |
31 | ||
32 | if (!input_stat.st_size) { | |
33 | pr_info("zero-sized file (%s), nothing to do!\n", | |
34 | self->filename); | |
35 | goto out_close; | |
36 | } | |
37 | ||
38 | if (perf_header__read(&self->header, self->fd) < 0) { | |
39 | pr_err("incompatible file format"); | |
40 | goto out_close; | |
41 | } | |
42 | ||
43 | self->size = input_stat.st_size; | |
44 | return 0; | |
45 | ||
46 | out_close: | |
47 | close(self->fd); | |
48 | self->fd = -1; | |
49 | return -1; | |
50 | } | |
51 | ||
75be6cf4 | 52 | struct perf_session *perf_session__new(const char *filename, int mode, bool force) |
94c744b6 | 53 | { |
b3165f41 | 54 | size_t len = filename ? strlen(filename) + 1 : 0; |
94c744b6 ACM |
55 | struct perf_session *self = zalloc(sizeof(*self) + len); |
56 | ||
57 | if (self == NULL) | |
58 | goto out; | |
59 | ||
60 | if (perf_header__init(&self->header) < 0) | |
4aa65636 | 61 | goto out_free; |
94c744b6 ACM |
62 | |
63 | memcpy(self->filename, filename, len); | |
b3165f41 ACM |
64 | self->threads = RB_ROOT; |
65 | self->last_match = NULL; | |
ec913369 ACM |
66 | self->mmap_window = 32; |
67 | self->cwd = NULL; | |
68 | self->cwdlen = 0; | |
4aa65636 | 69 | map_groups__init(&self->kmaps); |
94c744b6 | 70 | |
75be6cf4 | 71 | if (perf_session__create_kernel_maps(self) < 0) |
4aa65636 ACM |
72 | goto out_delete; |
73 | ||
74 | if (mode == O_RDONLY && perf_session__open(self, force) < 0) | |
75 | goto out_delete; | |
94c744b6 ACM |
76 | out: |
77 | return self; | |
4aa65636 | 78 | out_free: |
94c744b6 ACM |
79 | free(self); |
80 | return NULL; | |
4aa65636 ACM |
81 | out_delete: |
82 | perf_session__delete(self); | |
83 | return NULL; | |
94c744b6 ACM |
84 | } |
85 | ||
86 | void perf_session__delete(struct perf_session *self) | |
87 | { | |
88 | perf_header__exit(&self->header); | |
89 | close(self->fd); | |
ec913369 | 90 | free(self->cwd); |
94c744b6 ACM |
91 | free(self); |
92 | } | |
a328626b ACM |
93 | |
94 | static bool symbol__match_parent_regex(struct symbol *sym) | |
95 | { | |
96 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) | |
97 | return 1; | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | struct symbol **perf_session__resolve_callchain(struct perf_session *self, | |
103 | struct thread *thread, | |
104 | struct ip_callchain *chain, | |
105 | struct symbol **parent) | |
106 | { | |
107 | u8 cpumode = PERF_RECORD_MISC_USER; | |
108 | struct symbol **syms = NULL; | |
109 | unsigned int i; | |
110 | ||
d599db3f | 111 | if (symbol_conf.use_callchain) { |
a328626b ACM |
112 | syms = calloc(chain->nr, sizeof(*syms)); |
113 | if (!syms) { | |
114 | fprintf(stderr, "Can't allocate memory for symbols\n"); | |
115 | exit(-1); | |
116 | } | |
117 | } | |
118 | ||
119 | for (i = 0; i < chain->nr; i++) { | |
120 | u64 ip = chain->ips[i]; | |
121 | struct addr_location al; | |
122 | ||
123 | if (ip >= PERF_CONTEXT_MAX) { | |
124 | switch (ip) { | |
125 | case PERF_CONTEXT_HV: | |
126 | cpumode = PERF_RECORD_MISC_HYPERVISOR; break; | |
127 | case PERF_CONTEXT_KERNEL: | |
128 | cpumode = PERF_RECORD_MISC_KERNEL; break; | |
129 | case PERF_CONTEXT_USER: | |
130 | cpumode = PERF_RECORD_MISC_USER; break; | |
131 | default: | |
132 | break; | |
133 | } | |
134 | continue; | |
135 | } | |
136 | ||
137 | thread__find_addr_location(thread, self, cpumode, | |
138 | MAP__FUNCTION, ip, &al, NULL); | |
139 | if (al.sym != NULL) { | |
140 | if (sort__has_parent && !*parent && | |
141 | symbol__match_parent_regex(al.sym)) | |
142 | *parent = al.sym; | |
d599db3f | 143 | if (!symbol_conf.use_callchain) |
a328626b ACM |
144 | break; |
145 | syms[i] = al.sym; | |
146 | } | |
147 | } | |
148 | ||
149 | return syms; | |
150 | } |