2 * Copyright (C) 2018 Stefan Schake <stschake@gmail.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 #include <backtrace/Backtrace.h>
26 #include "util/u_debug.h"
27 #include "u_debug_stack.h"
28 #include "util/hash_table.h"
29 #include "os/os_thread.h"
31 static hash_table
*backtrace_table
;
32 static mtx_t table_mutex
= _MTX_INITIALIZER_NP
;
35 debug_backtrace_capture(debug_stack_frame
*mesa_backtrace
,
39 hash_entry
*backtrace_entry
;
46 /* We keep an Android Backtrace handler around for each thread */
47 mtx_lock(&table_mutex
);
49 backtrace_table
= _mesa_hash_table_create(NULL
, _mesa_hash_pointer
,
50 _mesa_key_pointer_equal
);
52 backtrace_entry
= _mesa_hash_table_search(backtrace_table
, (void*) (uintptr_t)tid
);
53 if (!backtrace_entry
) {
54 backtrace
= Backtrace::Create(getpid(), tid
);
55 _mesa_hash_table_insert(backtrace_table
, (void*) (uintptr_t)tid
, backtrace
);
57 backtrace
= (Backtrace
*) backtrace_entry
->data
;
59 mtx_unlock(&table_mutex
);
61 /* Add one to exclude this call. Unwind already ignores itself. */
62 backtrace
->Unwind(start_frame
+ 1);
64 /* Store the Backtrace handler in the first mesa frame for reference.
65 * Unwind will generally return less frames than nr_frames specified
66 * but we have no good way of storing the real count otherwise.
67 * The Backtrace handler only stores the results until the next Unwind,
68 * but that is how u_debug_stack is used anyway.
70 mesa_backtrace
->function
= backtrace
;
74 debug_backtrace_dump(const debug_stack_frame
*mesa_backtrace
,
77 Backtrace
*backtrace
= (Backtrace
*) mesa_backtrace
->function
;
83 if (nr_frames
> backtrace
->NumFrames())
84 nr_frames
= backtrace
->NumFrames();
85 for (i
= 0; i
< nr_frames
; i
++) {
86 /* There is no prescribed format and this isn't interpreted further,
87 * so we simply use the default Android format.
89 const std::string
& frame_line
= backtrace
->FormatFrameData(i
);
90 debug_printf("%s\n", frame_line
.c_str());
95 debug_backtrace_print(FILE *f
,
96 const debug_stack_frame
*mesa_backtrace
,
99 Backtrace
*backtrace
= (Backtrace
*) mesa_backtrace
->function
;
105 if (nr_frames
> backtrace
->NumFrames())
106 nr_frames
= backtrace
->NumFrames();
107 for (i
= 0; i
< nr_frames
; i
++) {
108 const std::string
& frame_line
= backtrace
->FormatFrameData(i
);
109 fprintf(f
, "%s\n", frame_line
.c_str());