Introduce interrupts module for debug and trace
Interrupts module has following functions to perform:
1. Apply boot time configuration
- Create a new trace instance
- Enable required irq and irq_gia events in the
instance
- Apply required filters on the high frequency
events
- Set instance's trace buffer size
- Enable tracing
2. Sepolicy for every required access
3. Copy interrupts trace buffer to dumpsys whenever triggered
AVC denials:
avc: denied { search } for comm="dump_interrupts" name="radio" dev="dm-53" ino=373 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=dir permissive=1
avc: denied { write } for comm="dump_interrupts" name="all_logs" dev="dm-53" ino=7808 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=dir permissive=1
avc: denied { add_name } for comm="dump_interrupts" name="interrupts" scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=dir permissive=1
avc: denied { create } for comm="dump_interrupts" name="interrupts" scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=dir permissive=1
avc: denied { search } for comm="dump_interrupts" name="instances" dev="tracefs" ino=2151 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:debugfs_tracing_instances:s0 tclass=dir permissive=1
avc: denied { search } for comm="dump_interrupts" name="radio" dev="dm-53" ino=373 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=dir permissive=1
avc: denied { read } for comm="dump_interrupts" name="trace" dev="tracefs" ino=143409 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:tracefs_instances_interrupts:s0 tclass=file permissive=1
avc: denied { open } for comm="dump_interrupts" path="/sys/kernel/tracing/instances/irq_gia_google/trace" dev="tracefs" ino=143409 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:tracefs_instances_interrupts:s0 tclass=file permissive=1
avc: denied { create } for comm="dump_interrupts" name="interrupts_trace" scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=file permissive=1
avc: denied { write open } for comm="dump_interrupts" path="/data/vendor/radio/logs/always-on/all_logs/interrupts/interrupts_trace" dev="dm-53" ino=8102 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=file permissive=1
avc: denied { getattr } for comm="dump_interrupts" path="/sys/kernel/tracing/instances/irq_gia_google/trace" dev="tracefs" ino=141578 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:tracefs_instances_interrupts:s0 tclass=file permissive=1
avc: denied { getattr } for comm="dump_interrupts" path="/data/vendor/radio/logs/always-on/all_logs/interrupts/interrupts_trace" dev="dm-53" ino=7965 scontext=u:r:dump_interrupts_traces:s0 tcontext=u:object_r:radio_vendor_data_file:s0 tclass=file permissive=1
Flag: EXEMPT, add interrupts traces dump program to bugreport
Bug: 376124648
Test: Manually checked boot time trace configuration. Collected
`adb bugreport`. And checked interrupt traces are dumped
into and extracted out from the bugreport. More details
in the bug.
Change-Id: I08872a321fa9726b50a54aeb0a91ed63c0652a3a
diff --git a/interrupts/Android.bp b/interrupts/Android.bp
new file mode 100644
index 0000000..a4f62bc
--- /dev/null
+++ b/interrupts/Android.bp
@@ -0,0 +1,21 @@
+package {
+ default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_binary {
+ name: "dump_interrupts_traces",
+ srcs: ["traces/dump_interrupts_traces.cpp"],
+ init_rc: ["init.interrupts.rc"],
+ cflags: [
+ "-Wall",
+ "-Wextra",
+ "-Werror",
+ ],
+ shared_libs: [
+ "libbase",
+ "libdump",
+ "liblog",
+ ],
+ vendor: true,
+ relative_install_path: "dump",
+}