d0ecf0b30d
Introducing a new systrace tag, TRACE_TAG_SYSPROP, for use with
system property.
For property set, the tracing is added in __system_property_set() instead of
__system_property_update() / __system_property_add() so we can record
control properties like ctl.*, sys.powerctl.*, etc.., which won't be
updated via the latter two functions.
Bug: 147275573
Test: atest CtsBionicTestCases
Test: adb shell perfetto -o /data/misc/perfetto-traces/test_trace -t 10s bionic
Test: adb shell perfetto -o /data/misc/perfetto-traces/test_trace -t 10s sysprop
Test: adb shell /data/benchmarktest64/bionic-benchmarks/bionic-benchmarks \
--benchmark_filter=BM_property --bionic_cpu=4, then compares the results
of property benchmarks before and after the change, didn't see
significant difference.
Change-Id: Id2b93acb2ce02b308c0e4889f836159151af3b46
Merged-In: Id2b93acb2ce02b308c0e4889f836159151af3b46
(cherry picked from commit 26970c3493)
45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
/*
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* Copyright (C) 2014 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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#pragma once
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#include <cutils/trace.h> // For ATRACE_TAG_BIONIC.
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#include "platform/bionic/macros.h"
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static constexpr char kTraceTagsProp[] = "debug.atrace.tags.enableflags";
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// Tracing class for bionic. To begin a trace at a specified point:
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// ScopedTrace("Trace message");
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// The trace will end when the contructor goes out of scope.
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class __LIBC_HIDDEN__ ScopedTrace {
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public:
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explicit ScopedTrace(const char* message);
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~ScopedTrace();
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void End();
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private:
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bool called_end_;
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BIONIC_DISALLOW_COPY_AND_ASSIGN(ScopedTrace);
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};
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int get_trace_marker_fd();
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bool should_trace(const uint64_t enable_tags = ATRACE_TAG_BIONIC);
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void output_trace(const char* message, const char event = 'B');
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void bionic_trace_begin(const char* message);
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void bionic_trace_end();
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