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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
f6d72532 HK |
2 | #include "unwind.h" |
3 | #include "thread.h" | |
d64ec10e HK |
4 | #include "session.h" |
5 | #include "debug.h" | |
4e8fbc1c | 6 | #include "env.h" |
f6d72532 HK |
7 | |
8 | struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops; | |
52ffe0ff | 9 | struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops; |
057fbfb2 | 10 | struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops; |
f6d72532 HK |
11 | |
12 | static void unwind__register_ops(struct thread *thread, | |
13 | struct unwind_libunwind_ops *ops) | |
14 | { | |
15 | thread->unwind_libunwind_ops = ops; | |
16 | } | |
17 | ||
a2873325 JO |
18 | int unwind__prepare_access(struct thread *thread, struct map *map, |
19 | bool *initialized) | |
f6d72532 | 20 | { |
d64ec10e HK |
21 | const char *arch; |
22 | enum dso_type dso_type; | |
52ffe0ff | 23 | struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops; |
a2873325 | 24 | int err; |
d64ec10e HK |
25 | |
26 | if (thread->addr_space) { | |
27 | pr_debug("unwind: thread map already set, dso=%s\n", | |
28 | map->dso->name); | |
a2873325 JO |
29 | if (initialized) |
30 | *initialized = true; | |
d64ec10e HK |
31 | return 0; |
32 | } | |
33 | ||
34 | /* env->arch is NULL for live-mode (i.e. perf top) */ | |
35 | if (!thread->mg->machine->env || !thread->mg->machine->env->arch) | |
36 | goto out_register; | |
37 | ||
38 | dso_type = dso__type(map->dso, thread->mg->machine); | |
39 | if (dso_type == DSO__TYPE_UNKNOWN) | |
40 | return 0; | |
41 | ||
4e8fbc1c | 42 | arch = perf_env__arch(thread->mg->machine->env); |
52ffe0ff HK |
43 | |
44 | if (!strcmp(arch, "x86")) { | |
45 | if (dso_type != DSO__TYPE_64BIT) | |
46 | ops = x86_32_unwind_libunwind_ops; | |
057fbfb2 HK |
47 | } else if (!strcmp(arch, "arm64") || !strcmp(arch, "arm")) { |
48 | if (dso_type == DSO__TYPE_64BIT) | |
49 | ops = arm64_unwind_libunwind_ops; | |
52ffe0ff HK |
50 | } |
51 | ||
52 | if (!ops) { | |
53 | pr_err("unwind: target platform=%s is not supported\n", arch); | |
1934adf7 | 54 | return 0; |
52ffe0ff | 55 | } |
d64ec10e | 56 | out_register: |
52ffe0ff | 57 | unwind__register_ops(thread, ops); |
f6d72532 | 58 | |
a2873325 JO |
59 | err = thread->unwind_libunwind_ops->prepare_access(thread); |
60 | if (initialized) | |
61 | *initialized = err ? false : true; | |
62 | return err; | |
f6d72532 HK |
63 | } |
64 | ||
65 | void unwind__flush_access(struct thread *thread) | |
66 | { | |
67 | if (thread->unwind_libunwind_ops) | |
68 | thread->unwind_libunwind_ops->flush_access(thread); | |
69 | } | |
70 | ||
71 | void unwind__finish_access(struct thread *thread) | |
72 | { | |
73 | if (thread->unwind_libunwind_ops) | |
74 | thread->unwind_libunwind_ops->finish_access(thread); | |
75 | } | |
76 | ||
77 | int unwind__get_entries(unwind_entry_cb_t cb, void *arg, | |
78 | struct thread *thread, | |
79 | struct perf_sample *data, int max_stack) | |
80 | { | |
81 | if (thread->unwind_libunwind_ops) | |
82 | return thread->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack); | |
83 | return 0; | |
84 | } |