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-rw-r--r--simpleperf/ETMRecorder.cpp225
1 files changed, 0 insertions, 225 deletions
diff --git a/simpleperf/ETMRecorder.cpp b/simpleperf/ETMRecorder.cpp
deleted file mode 100644
index b561c483..00000000
--- a/simpleperf/ETMRecorder.cpp
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * Copyright (C) 2019 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.
- */
-
-#include "ETMRecorder.h"
-
-#include <stdio.h>
-#include <sys/sysinfo.h>
-
-#include <memory>
-#include <limits>
-#include <string>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/parseint.h>
-#include <android-base/strings.h>
-
-#include "utils.h"
-
-namespace simpleperf {
-
-static constexpr bool ETM_RECORD_TIMESTAMP = false;
-
-// Config bits from include/linux/coresight-pmu.h in the kernel
-// For etm_event_config:
-static constexpr int ETM_OPT_CTXTID = 14;
-static constexpr int ETM_OPT_TS = 28;
-// For etm_config_reg:
-static constexpr int ETM4_CFG_BIT_CTXTID = 6;
-static constexpr int ETM4_CFG_BIT_TS = 11;
-
-static const std::string ETM_DIR = "/sys/bus/event_source/devices/cs_etm/";
-
-// from coresight_get_trace_id(int cpu) in include/linux/coresight-pmu.h
-static int GetTraceId(int cpu) {
- return 0x10 + cpu * 2;
-}
-
-template <typename T>
-static bool ReadValueInEtmDir(const std::string& file, T* value, bool report_error = true) {
- std::string s;
- uint64_t v;
- if (!android::base::ReadFileToString(ETM_DIR + file, &s) ||
- !android::base::ParseUint(android::base::Trim(s), &v)) {
- if (report_error) {
- LOG(ERROR) << "failed to read " << ETM_DIR << file;
- }
- return false;
- }
- *value = static_cast<T>(v);
- return true;
-}
-
-static uint32_t GetBits(uint32_t value, int start, int end) {
- return (value >> start) & ((1U << (end - start + 1)) - 1);
-}
-
-int ETMPerCpu::GetMajorVersion() const {
- return GetBits(trcidr1, 8, 11);
-}
-
-bool ETMPerCpu::IsContextIDSupported() const {
- return GetBits(trcidr2, 5, 9) >= 4;
-}
-
-bool ETMPerCpu::IsTimestampSupported() const {
- return GetBits(trcidr0, 24, 28) > 0;
-}
-
-ETMRecorder& ETMRecorder::GetInstance() {
- static ETMRecorder etm;
- return etm;
-}
-
-int ETMRecorder::GetEtmEventType() {
- if (event_type_ == 0) {
- if (!IsDir(ETM_DIR) || !ReadValueInEtmDir("type", &event_type_, false)) {
- event_type_ = -1;
- }
- }
- return event_type_;
-}
-
-std::unique_ptr<EventType> ETMRecorder::BuildEventType() {
- int etm_event_type = GetEtmEventType();
- if (etm_event_type == -1) {
- return nullptr;
- }
- return std::make_unique<EventType>(
- "cs-etm", etm_event_type, 0, "CoreSight ETM instruction tracing", "arm");
-}
-
-bool ETMRecorder::CheckEtmSupport() {
- if (GetEtmEventType() == -1) {
- LOG(ERROR) << "etm event type isn't supported on device";
- return false;
- }
- if (!ReadEtmInfo()) {
- LOG(ERROR) << "etm devices are not available";
- return false;
- }
- for (const auto& p : etm_info_) {
- if (p.second.GetMajorVersion() < 4) {
- LOG(ERROR) << "etm device version is less than 4.0";
- return false;
- }
- if (!p.second.IsContextIDSupported()) {
- LOG(ERROR) << "etm device doesn't support contextID";
- return false;
- }
- }
- if (!FindSinkConfig()) {
- LOG(ERROR) << "can't find etr device, which moves etm data to memory";
- return false;
- }
- etm_supported_ = true;
- return true;
-}
-
-bool ETMRecorder::ReadEtmInfo() {
- int cpu_count = get_nprocs_conf();
- for (const auto &name : GetEntriesInDir(ETM_DIR)) {
- int cpu;
- if (sscanf(name.c_str(), "cpu%d", &cpu) == 1) {
- ETMPerCpu &cpu_info = etm_info_[cpu];
- bool success =
- ReadValueInEtmDir(name + "/trcidr/trcidr0", &cpu_info.trcidr0) &&
- ReadValueInEtmDir(name + "/trcidr/trcidr1", &cpu_info.trcidr1) &&
- ReadValueInEtmDir(name + "/trcidr/trcidr2", &cpu_info.trcidr2) &&
- ReadValueInEtmDir(name + "/trcidr/trcidr4", &cpu_info.trcidr4) &&
- ReadValueInEtmDir(name + "/trcidr/trcidr8", &cpu_info.trcidr8) &&
- ReadValueInEtmDir(name + "/mgmt/trcauthstatus", &cpu_info.trcauthstatus);
- if (!success) {
- return false;
- }
- }
- }
- return (etm_info_.size() == cpu_count);
-}
-
-bool ETMRecorder::FindSinkConfig() {
- for (const auto &name : GetEntriesInDir(ETM_DIR + "sinks")) {
- if (name.find("etr") != -1) {
- if (ReadValueInEtmDir("sinks/" + name, &sink_config_)) {
- return true;
- }
- }
- }
- return false;
-}
-
-void ETMRecorder::SetEtmPerfEventAttr(perf_event_attr* attr) {
- CHECK(etm_supported_);
- BuildEtmConfig();
- attr->config = etm_event_config_;
- attr->config2 = sink_config_;
-}
-
-void ETMRecorder::BuildEtmConfig() {
- if (etm_event_config_ == 0) {
- etm_event_config_ |= 1ULL << ETM_OPT_CTXTID;
- etm_config_reg_ |= 1U << ETM4_CFG_BIT_CTXTID;
-
- if (ETM_RECORD_TIMESTAMP) {
- bool ts_supported = true;
- for (auto& p : etm_info_) {
- ts_supported &= p.second.IsTimestampSupported();
- }
- if (ts_supported) {
- etm_event_config_ |= 1ULL << ETM_OPT_TS;
- etm_config_reg_ |= 1U << ETM4_CFG_BIT_TS;
- }
- }
- }
-}
-
-AuxTraceInfoRecord ETMRecorder::CreateAuxTraceInfoRecord() {
- AuxTraceInfoRecord::DataType data;
- memset(&data, 0, sizeof(data));
- data.aux_type = AuxTraceInfoRecord::AUX_TYPE_ETM;
- data.nr_cpu = etm_info_.size();
- data.pmu_type = GetEtmEventType();
- std::vector<AuxTraceInfoRecord::ETM4Info> etm4_v(etm_info_.size());
- size_t pos = 0;
- for (auto& p : etm_info_) {
- auto& e = etm4_v[pos++];
- e.magic = AuxTraceInfoRecord::MAGIC_ETM4;
- e.cpu = p.first;
- e.trcconfigr = etm_config_reg_;
- e.trctraceidr = GetTraceId(p.first);
- e.trcidr0 = p.second.trcidr0;
- e.trcidr1 = p.second.trcidr1;
- e.trcidr2 = p.second.trcidr2;
- e.trcidr8 = p.second.trcidr8;
- e.trcauthstatus = p.second.trcauthstatus;
- }
- return AuxTraceInfoRecord(data, etm4_v);
-}
-
-size_t ETMRecorder::GetAddrFilterPairs() {
- CHECK(etm_supported_);
- size_t min_pairs = std::numeric_limits<size_t>::max();
- for (auto& p : etm_info_) {
- min_pairs = std::min<size_t>(min_pairs, GetBits(p.second.trcidr4, 0, 3));
- }
- if (min_pairs > 0) {
- --min_pairs; // One pair is used by the kernel to set default addr filter.
- }
- return min_pairs;
-}
-
-} // namespace simpleperf \ No newline at end of file
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