Merge "Introduce interrupts module for debug and trace" into main
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commit
1b957304b3
8 changed files with 88 additions and 0 deletions
21
interrupts/Android.bp
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21
interrupts/Android.bp
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package {
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default_applicable_licenses: ["Android-Apache-2.0"],
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}
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cc_binary {
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name: "dump_interrupts_traces",
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srcs: ["traces/dump_interrupts_traces.cpp"],
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init_rc: ["init.interrupts.rc"],
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cflags: [
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"-Wall",
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"-Wextra",
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"-Werror",
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],
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shared_libs: [
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"libbase",
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"libdump",
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"liblog",
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],
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vendor: true,
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relative_install_path: "dump",
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}
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23
interrupts/init.interrupts.rc
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23
interrupts/init.interrupts.rc
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on init
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# Create the directory for the trace instance during early init
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mkdir /sys/kernel/tracing/instances/irq_gia_google 0755 root root
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chown system system /sys/kernel/tracing/instances/irq_gia_google
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chown system system /sys/kernel/tracing/instances/irq_gia_google/trace
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# Enable gia events
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write /sys/kernel/tracing/instances/irq_gia_google/events/irq_gia/enable 1
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# There are some very high frequency IRQ events happening all the time. Tracing
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# them is not absolute necessity, but a flood of them is noise for more interesting
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# events that we want to capture. All these high frequency IRQs have virq < 11.
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write /sys/kernel/tracing/instances/irq_gia_google/events/irq/filter "irq > 11"
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write /sys/kernel/tracing/instances/irq_gia_google/events/irq/irq_handler_entry/enable 1
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write /sys/kernel/tracing/instances/irq_gia_google/events/irq/irq_handler_exit/enable 1
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# Keep the buffer size small. This size is practically enough for debug purpose.
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# Having low size helps because this entire buffer gets dumped in bugreport.
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# Having a large size can impact bugreport size and time it takes to pack/unpack.
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write /sys/kernel/tracing/instances/irq_gia_google/buffer_size_kb 512
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# Go!
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write /sys/kernel/tracing/instances/irq_gia_google/tracing_on 1
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3
interrupts/interrupts.mk
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3
interrupts/interrupts.mk
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BOARD_VENDOR_SEPOLICY_DIRS += device/google/gs-common/interrupts/traces/sepolicy
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PRODUCT_PACKAGES += dump_interrupts_traces
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30
interrupts/traces/dump_interrupts_traces.cpp
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30
interrupts/traces/dump_interrupts_traces.cpp
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/*
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* Copyright 2024 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <dump/pixel_dump.h>
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#include <android-base/file.h>
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int main() {
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std::string outputDir = concatenatePath(BUGREPORT_PACKING_DIR, "interrupts");
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if (mkdir(outputDir.c_str(), 0777) == -1) {
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printf("Unable to create folder: %s\n", outputDir.c_str());
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return 0;
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}
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copyFile("/sys/kernel/tracing/instances/irq_gia_google/trace",
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concatenatePath(outputDir.c_str(), "interrupts_trace").c_str());
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return 0;
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}
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7
interrupts/traces/sepolicy/dump_interrupts_traces.te
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7
interrupts/traces/sepolicy/dump_interrupts_traces.te
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#
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pixel_bugreport(dump_interrupts_traces)
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allow dump_interrupts_traces radio_vendor_data_file:dir { search add_name create write };
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allow dump_interrupts_traces radio_vendor_data_file:file { getattr create write open };
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allow dump_interrupts_traces debugfs_tracing_instances:dir search;
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allow dump_interrupts_traces tracefs_instances_interrupts:file { getattr read open };
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2
interrupts/traces/sepolicy/file.te
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2
interrupts/traces/sepolicy/file.te
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#
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type tracefs_instances_interrupts, sysfs_type, fs_type;
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1
interrupts/traces/sepolicy/file_contexts
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1
interrupts/traces/sepolicy/file_contexts
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/vendor/bin/dump/dump_interrupts_traces u:object_r:dump_interrupts_traces_exec:s0
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1
interrupts/traces/sepolicy/genfs_contexts
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1
interrupts/traces/sepolicy/genfs_contexts
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genfscon tracefs /instances/irq_gia_google/trace u:object_r:tracefs_instances_interrupts:s0
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