| <html devsite> |
| <head> |
| <title>Using Valgrind</title> |
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| <body> |
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| |
| <p>The <a href="http://valgrind.org/">Valgrind</a> tool suite includes Memcheck |
| (for detecting memory-related errors in C and C++), Cachegrind (a cache |
| profiler), Massif (a heap profiler), and several other tools.</p> |
| |
| <aside class="warning"><strong>Warning:</strong> Valgrind is deprecated and has |
| been removed from AOSP master. We strongly recommend using the |
| <a href="/devices/tech/debug/asan.html">AddressSanitizer</a> tool instead. |
| </aside> |
| |
| <h2 id=build-valgrind>Building Valgrind</h2> |
| <p>To build Valgrind:</p> |
| <pre class="devsite-terminal devsite-click-to-copy"> |
| mmma -j6 external/valgrind |
| </pre> |
| |
| <h2 id=app-valgrind>Using on an application</h2> |
| <p>To use Valgrind on an application:</p> |
| |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">adb shell setprop wrap.<em>app_name</em> "logwrapper valgrind"</code> |
| <code class="devsite-terminal">adb shell am start -a android.intent.action.MAIN -n <em>app_name</em>/.MainActivity</code> |
| </pre> |
| |
| <code><em>app_name</em></code> must be a fully-qualified name such as |
| <strong>com.google.example_app</strong>. |
| |
| <h2 id=server-valgrind>Using on the system server</h2> |
| <p>To run the system server with Valgrind:</p> |
| |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">adb shell setprop wrap.system_server "logwrapper valgrind"</code> |
| <code class="devsite-terminal">adb shell stop && adb shell start</code> |
| </pre> |
| |
| |
| <h2 id=symbols-valgrind>Getting debug symbols</h2> |
| <p>For debug symbols, push unstripped libraries to <code>/data/local/symbols</code>:</p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">adb shell mkdir /data/local/symbols</code> |
| <code class="devsite-terminal">adb push $OUT/symbols /data/local/symbols</code> |
| </pre> |
| |
| <h2 id=boot-valgrind>Using during boot up</h2> |
| <p>To use Valgrind during boot up, edit |
| <code>out/target/product/XXXX/root/init.rc</code> by changing</p> |
| <pre class="devsite-click-to-copy">service example /system/bin/foo --arg1 --arg2</pre> |
| <p>to:</p> |
| <pre class="devsite-click-to-copy">service example /system/bin/logwrapper /system/bin/valgrind /system/bin/foo --arg1 --arg2</pre> |
| <p>To see the effects, create a <code>boot.img</code> and reflash the |
| device.</p> |
| |
| </body> |
| </html> |
