The process_vm_read function is much faster than ptrace, but sometimes
that will not work on a remote process. Modify the libunwindstack
MemoryRemote object to figure out which one it can use.
Wrote new unit test to verify this checking behavior.
Modify libbacktrace so that the read from libunwind is used instead of
using the default ptrace calls.
Add some benchmarks to libbacktrace to compare the two different methods.
Test: Ran unit tests libbacktrace/libunwindstack/debuggerd.
Test: Ran debuggerd -b <SYSTEM_SERVER_PID>
Test: Ran debuggerd -b <MEDIACODEC PID>
Test: Ran debuggerd -b <RANDOM_PID>
Test: Used crasher to create tombstones and verified stack data is
Test: dumped properly.
Change-Id: If75ca238289532dd8e1de430d569cabb2523380a
The dep files are not required because change in the command line
triggers the rule.
Test: m -j ld.config.txt llndk.libraries.txt vndksp.libraries.txt
Re-run the build after adding or removing libs to/from the vndk set.
The txt files are updated accordingly.
Merged-In: I9c9e22088cc2afeb66e8b159f611b25d698cf800
Change-Id: I9c9e22088cc2afeb66e8b159f611b25d698cf800
(cherry picked from commit 81088bf131)
Add an ArchEnum to express the arch of the Elf objects and Reg objects.
Split out the regs code into per arch pieces and generic parts.
Also, split out the header files for each arch.
Do not break out the test code yet, there isn't enough and it doesn't
help to maintain the tests.
Test: libunwindstack/libbacktrace/debuggerd unit tests pass.
Test: Running debuggerd -b <PIDS> yields valid data on bullhead.
Change-Id: If61f6c730c9ff2249f986b41de8c4d62f7158325
We already have /etc and /sbin. As the Android world moves towards / being
on the system partition, the circumstances under which a /bin symlink
won't work are reduced. This should already be usable most of the time.
Bug: http://b/63142920
Test: `adb shell /bin/date`
Change-Id: I81c2209ae808ced186d05fbe1d5417ce8dd93ea7
Add a static GetLoadBias method to the Elf object that only reads just
enough to get the load bias.
Add a method to MapInfo that gets the load bias. First attempt to get
it if the elf object already exists. If no elf object was created, use
the new static method to get the load bias.
In BacktraceMap, add a custom iterator so that when code dereferences
a map element, that's when the load bias will be retrieved if it hasn't
already been set.
Bug: 69871050
Test: New unit tests, verify tombstones have non-zero load bias values for
Test: libraries with a non-zero load bias.
Change-Id: I125f4abc827589957fce2f0df24b0f25d037d732
logd suffers performance degradation when multiple blocking
readers connect to it. Each time when the writer thread log
new entries, all of the readers are notified regardless of
which log id they are watching.
In this case, only give notification to the readers who are
actually watching new entries' log id. This decreases logd
CPU consumption by skipping unnecessary LogBuffer::flushTo
loops.
Test: liblog-unit-tests, logd-unit-tests & CtsLiblogTestCases
logcat-unit-tests
Test: manual:
1.'logcat –b all' at constant heavy logging load level
2.simultaneously 'logcat –b crash' in another session,
a healthy crash buffer usually keep empty
3.logd CPU consumption doesn't increase after step 2
Change-Id: I4ffc045c9feb7a0998f7e47ae2173f8f6aa28e8a
Some processes will fail to read when using process_vm_read, so switch
back to ptrace for now. For example, the system_server process only
gets two frames without this fix.
Fix up some of the remote memory read unit tests to allow passing
even when using ptrace.
Bug: 70160908
Test: All unit tests pass, debuggerd -b <system_server pid> works.
Change-Id: I37c67bf9c480d7268c9fe32dad6a8d78a4020b85
ODM partition may contain firmware and we should allow
firmware loading from this partition
Test: firmware is loaded succesfully
Change-Id: I7d327bc79a04d1a2dee0fd47407eb53f9d391665
Signed-off-by: Alin Jerpelea <alin.jerpelea@sonymobile.com>
Christopher Ferris