README
README.ANDROID
1 Google Breakpad for Android
2 ===========================
3
4 This document explains how to use the Google Breakpad client library
5 on Android, and later generate valid stack traces from the minidumps
6 it generates.
7
8 This release supports ARM, x86 and MIPS based Android systems.
9 This release requires NDK release r10c or higher.
10
11 I. Building the client library:
12 ===============================
13
14 The Android client is built as a static library that you can
15 link into your own Android native code. There are two ways to
16 build it:
17
18 I.1. Building with ndk-build:
19 -----------------------------
20
21 If you're using the ndk-build build system, you can follow
22 these simple steps:
23
24 1/ Include android/google_breakpad/Android.mk from your own
25 project's Android.mk
26
27 This can be done either directly, or using ndk-build's
28 import-module feature.
29
30 2/ Link the library to one of your modules by using:
31
32 LOCAL_STATIC_LIBRARIES += breakpad_client
33
34 NOTE: The client library requires a C++ STL implementation,
35 which you can select with APP_STL in your Application.mk
36
37 It has been tested succesfully with both STLport and GNU libstdc++
38
39
40 I.2. Building with a standalone Android toolchain:
41 --------------------------------------------------
42
43 All you need to do is configure your build with the right 'host'
44 value, and disable the processor and tools, as in:
45
46 $GOOGLE_BREAKPAD_PATH/configure --host=arm-linux-androideabi \
47 --disable-processor \
48 --disable-tools
49 make -j4
50
51 The library will be under src/client/linux/libbreakpad_client.a
52
53 You can also use 'make check' to run the test suite on a connected
54 Android device. This requires the Android 'adb' tool to be in your
55 path.
56
57 II. Using the client library in Android:
58 ========================================
59
60 The usage instructions are very similar to the Linux ones that are
61 found at http://code.google.com/p/google-breakpad/wiki/LinuxStarterGuide
62
63 1/ You need to include "client/linux/handler/exception_handler.h" from a C++
64 source file.
65
66 2/ If you're not using ndk-build, you also need to:
67
68 - add the following to your compiler include search paths:
69 $GOOGLE_BREAKPAD_PATH/src
70 $GOOGLE_BREAKPAD_PATH/src/common/android/include
71
72 - add -llog to your linker flags
73
74 Note that ndk-build does that for your automatically.
75
76 3/ Keep in mind that there is no /tmp directory on Android.
77
78 If you use the library from a regular Android applications, specify a
79 path under your app-specific storage directory. An alternative is to
80 store them on the SDCard, but this requires a specific permission.
81
82 For a concrete example, see the sample test application under
83 android/sample_app. See its README for more information.
84
85
86 III. Getting a stack trace on the host:
87 =======================================
88
89 This process is similar to other platforms, but here's a quick example:
90
91 1/ Retrieve the minidumps on your development machine.
92
93 2/ Dump the symbols for your native libraries with the 'dump_syms' tool.
94 This first requires building the host version of Google Breakpad, then
95 calling:
96
97 dump_syms $PROJECT_PATH/obj/local/$ABI/libfoo.so > libfoo.so.sym
98
99 3/ Create the symbol directory hierarchy.
100
101 The first line of the generated libfoo.so.sym will have a "MODULE"
102 entry that carries a hexadecimal version number, e.g.:
103
104 MODULE Linux arm D51B4A5504974FA6ECC1869CAEE3603B0 test_google_breakpad
105
106 Note: The second field could be either 'Linux' or 'Android'.
107
108 Extract the version number, and a 'symbol' directory, for example:
109
110 $PROJECT_PATH/symbols/libfoo.so/$VERSION/
111
112 Copy/Move your libfoo.sym file there.
113
114 4/ Invoke minidump_stackwalk to create the stack trace:
115
116 minidump_stackwalk $MINIDUMP_FILE $PROJECT_PATH/symbols
117
118 Note that various helper scripts can be found on the web to automate these
119 steps.
120
121 IV. Verifying the Android build library:
122 ========================================
123
124 If you modify Google Breakpad and want to check that it still works correctly
125 on Android, please run the android/run-checks.sh script which will do all
126 necessary verifications for you. This includes:
127
128 - Rebuilding the full host binaries.
129 - Rebuilding the full Android binaries with configure/make.
130 - Rebuilding the client library unit tests, and running them on a device.
131 - Rebuilding the client library with ndk-build.
132 - Building, installing and running a test crasher program on a device.
133 - Extracting the corresponding minidump, dumping the test program symbols
134 and generating a stack trace.
135 - Checking the generated stack trace for valid source locations.
136
137 For more details, please run:
138
139 android/run-checks.sh --help-all
140