linker_debug.h revision ca0c11bd823f37f03cc8067cb182876827d5275a 
1/*
2 * Copyright (C) 2008-2010 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef _LINKER_DEBUG_H_
30#define _LINKER_DEBUG_H_
31
32#include <stdio.h>
33
34// You can increase the verbosity of debug traces by defining the LD_DEBUG
35// environment variable to a numeric value from 0 to 2 (corresponding to
36// INFO, TRACE, and DEBUG calls in the source). This will only
37// affect new processes being launched.
38
39// By default, traces are sent to logcat, with the "linker" tag. You can
40// change this to go to stdout instead by setting the definition of
41// LINKER_DEBUG_TO_LOG to 0.
42#define LINKER_DEBUG_TO_LOG  1
43
44#define TRACE_DEBUG          1
45#define DO_TRACE_LOOKUP      1
46#define DO_TRACE_RELO        1
47#define TIMING               0
48#define STATS                0
49#define COUNT_PAGES          0
50
51/*********************************************************************
52 * You shouldn't need to modify anything below unless you are adding
53 * more debugging information.
54 *
55 * To enable/disable specific debug options, change the defines above
56 *********************************************************************/
57
58
59/*********************************************************************/
60
61#include <private/debug_format.h>
62
63__LIBC_HIDDEN__ extern int gLdDebugVerbosity;
64
65#if LINKER_DEBUG_TO_LOG
66#define _PRINTVF(v,x...) \
67    do { \
68      if (gLdDebugVerbosity > (v)) __libc_format_log(5-(v),"linker",x); \
69    } while (0)
70#else /* !LINKER_DEBUG_TO_LOG */
71#define _PRINTVF(v,x...) \
72    do { \
73      if (gLdDebugVerbosity > (v)) { __libc_format_fd(1, x); write(1, "\n", 1); } \
74    } while (0)
75#endif /* !LINKER_DEBUG_TO_LOG */
76
77#define PRINT(x...)          _PRINTVF(-1, x)
78#define INFO(x...)           _PRINTVF(0, x)
79#define TRACE(x...)          _PRINTVF(1, x)
80
81#if TRACE_DEBUG
82#define DEBUG(x...)          _PRINTVF(2, "DEBUG: " x)
83#else /* !TRACE_DEBUG */
84#define DEBUG(x...)          do {} while (0)
85#endif /* TRACE_DEBUG */
86
87#define TRACE_TYPE(t,x...)   do { if (DO_TRACE_##t) { TRACE(x); } } while (0)
88
89#endif /* _LINKER_DEBUG_H_ */
90