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diff --git a/en/devices/architecture/kernel/lldb-debug.html b/en/devices/architecture/kernel/lldb-debug.html new file mode 100644 index 00000000..0c019fd5 --- /dev/null +++ b/en/devices/architecture/kernel/lldb-debug.html @@ -0,0 +1,110 @@ + <html devsite> + <head> + <title>Kernel Enhancements to LLDB/C++ Debugging</title> + <meta name="project_path" value="/_project.yaml" /> + <meta name="book_path" value="/_book.yaml" /> + </head> + <body> + <!-- + Copyright 2017 The Android Open Source Project + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + --> + +<p> +The Android 8.0 release includes kernel enhancements that help developers create +better applications by improving their debugging experience. +</p> +<p> +The arm64 Android kernels support setting watchpoints on memory addresses that +are not 4/8-byte aligned, and reporting all accesses to those addresses. +</p> +<h2 id="implementation">Implementation</h2> +<p> +The feature runs on any ARM 64-bit device. Adding the relevant support for +32-bit hardware/kernels is optional. All necessary kernel modifications have +already been done. +</p> +<p> +This feature is included in the current 3.10, 3.18, 4.4, and 4.9 kernel branches. +To add it to a kernel that does not already include it, cherry pick the +necessary CLs into your kernel build. Choose the patchset according to the +version your kernel is based on, as the patches required some adjustments due to +the kernel codebase evolving over time: +</p> + +<ul> + <li>branch android-3.10: + <ul> + <li><a + href="https://android.googlesource.com/kernel/common/+/bb42e87236d9defb511819991df21d464c1ef2eb">https://android.googlesource.com/kernel/common/+/bb42e87236d9defb511819991df21d464c1ef2eb</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/e8e0018306e1b9426dd70b44f057d1555c212ffb">https://android.googlesource.com/kernel/common/+/e8e0018306e1b9426dd70b44f057d1555c212ffb</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/fc0e9d5d77d9368ab15a06f7e61fff2ae2bc254d">https://android.googlesource.com/kernel/common/+/fc0e9d5d77d9368ab15a06f7e61fff2ae2bc254d</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/482ff2ca45737ee4bab3cf7221f6df1c9e14ea2c">https://android.googlesource.com/kernel/common/+/482ff2ca45737ee4bab3cf7221f6df1c9e14ea2c</a> + </ul> + + <li>branch android-3.18: + <ul> + <li><a + href="https://android.googlesource.com/kernel/common/+/b14849ae202487251b91e9f89af7eda484a80489">https://android.googlesource.com/kernel/common/+/b14849ae202487251b91e9f89af7eda484a80489</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/58a9c1be1966ca89facba6343a5d8781154196b7">https://android.googlesource.com/kernel/common/+/58a9c1be1966ca89facba6343a5d8781154196b7</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/d34d016794f345c5f1dccf4060b1132439098699">https://android.googlesource.com/kernel/common/+/d34d016794f345c5f1dccf4060b1132439098699</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/c82e0fdadfba89cdb50c96af622c2c5ad6cb55eb">https://android.googlesource.com/kernel/common/+/c82e0fdadfba89cdb50c96af622c2c5ad6cb55eb</a> + </ul> + + <li>branch android-4.4: + <ul> + <li><a + href="https://android.googlesource.com/kernel/common/+/91495bc622e9356dd63a7c77b98a21f0e2f5d2b2">https://android.googlesource.com/kernel/common/+/91495bc622e9356dd63a7c77b98a21f0e2f5d2b2</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/7409857a0717fa78dc936ea08099880be893156c">https://android.googlesource.com/kernel/common/+/7409857a0717fa78dc936ea08099880be893156c</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/b48318f371e8a8b98238deac868bc7af8ed8ba4b">https://android.googlesource.com/kernel/common/+/b48318f371e8a8b98238deac868bc7af8ed8ba4b</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/edc166a8714b012a3dd207e437c772ae2a264eca">https://android.googlesource.com/kernel/common/+/edc166a8714b012a3dd207e437c772ae2a264eca</a> + </ul> + + <li>branch android-4.9: + <ul> + <li><a + href="https://android.googlesource.com/kernel/common/+/85c450ac7ac0a69aca4c6eb845e419ae092d8c86">https://android.googlesource.com/kernel/common/+/85c450ac7ac0a69aca4c6eb845e419ae092d8c86</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/67de4de5628a47fa794920745dc7869c97b558d3">https://android.googlesource.com/kernel/common/+/67de4de5628a47fa794920745dc7869c97b558d3</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/32649b0a393303a97fab6003c5757ff7b100331a">https://android.googlesource.com/kernel/common/+/32649b0a393303a97fab6003c5757ff7b100331a</a> + <li><a + href="https://android.googlesource.com/kernel/common/+/d32793b6be517dffa29329a92ffcc688e74bc690">https://android.googlesource.com/kernel/common/+/d32793b6be517dffa29329a92ffcc688e74bc690</a></li> + </ul> +</ul> + +<p> +This feature implements an extension of the <code>ptrace</code> API to support +writing a debugger. +</p> +<h2 id="validation">Validation</h2> +<p> +There is a kernel selftest in the upstream repository, a CTS test, and there +are CTS tests added exercising the new kernel API: +</p> +<p> +<a +href="https://android.googlesource.com/platform/bionic/+/master/tests/sys_ptrace_test.cpp">https://android.googlesource.com/platform/bionic/+/master/tests/sys_ptrace_test.cpp</a> +</p> +</body> +</html> |