126 lines
4.4 KiB
C++
126 lines
4.4 KiB
C++
//===-- TraceIntelPTGDBRemotePackets.cpp ------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Utility/TraceIntelPTGDBRemotePackets.h"
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using namespace llvm;
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using namespace llvm::json;
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namespace lldb_private {
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const char *IntelPTDataKinds::kProcFsCpuInfo = "procfsCpuInfo";
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const char *IntelPTDataKinds::kIptTrace = "iptTrace";
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const char *IntelPTDataKinds::kPerfContextSwitchTrace =
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"perfContextSwitchTrace";
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bool TraceIntelPTStartRequest::IsPerCpuTracing() const {
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return per_cpu_tracing.value_or(false);
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}
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json::Value toJSON(const JSONUINT64 &uint64, bool hex) {
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if (hex)
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return json::Value(formatv("{0:x+}", uint64.value));
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else
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return json::Value(formatv("{0}", uint64.value));
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}
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bool fromJSON(const json::Value &value, JSONUINT64 &uint64, Path path) {
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if (Optional<uint64_t> val = value.getAsUINT64()) {
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uint64.value = *val;
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return true;
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} else if (Optional<StringRef> val = value.getAsString()) {
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if (!val->getAsInteger(/*radix=*/0, uint64.value))
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return true;
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path.report("invalid string number");
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}
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path.report("invalid number or string number");
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return false;
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}
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bool fromJSON(const json::Value &value, TraceIntelPTStartRequest &packet,
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Path path) {
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ObjectMapper o(value, path);
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if (!(o && fromJSON(value, (TraceStartRequest &)packet, path) &&
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o.map("enableTsc", packet.enable_tsc) &&
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o.map("psbPeriod", packet.psb_period) &&
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o.map("iptTraceSize", packet.ipt_trace_size)))
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return false;
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if (packet.IsProcessTracing()) {
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if (!o.map("processBufferSizeLimit", packet.process_buffer_size_limit) ||
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!o.map("perCpuTracing", packet.per_cpu_tracing) ||
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!o.map("disableCgroupTracing", packet.disable_cgroup_filtering))
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return false;
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}
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return true;
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}
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json::Value toJSON(const TraceIntelPTStartRequest &packet) {
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json::Value base = toJSON((const TraceStartRequest &)packet);
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json::Object &obj = *base.getAsObject();
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obj.try_emplace("iptTraceSize", packet.ipt_trace_size);
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obj.try_emplace("processBufferSizeLimit", packet.process_buffer_size_limit);
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obj.try_emplace("psbPeriod", packet.psb_period);
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obj.try_emplace("enableTsc", packet.enable_tsc);
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obj.try_emplace("perCpuTracing", packet.per_cpu_tracing);
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obj.try_emplace("disableCgroupTracing", packet.disable_cgroup_filtering);
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return base;
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}
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uint64_t LinuxPerfZeroTscConversion::ToNanos(uint64_t tsc) const {
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uint64_t quot = tsc >> time_shift;
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uint64_t rem_flag = (((uint64_t)1 << time_shift) - 1);
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uint64_t rem = tsc & rem_flag;
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return time_zero.value + quot * time_mult + ((rem * time_mult) >> time_shift);
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}
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uint64_t LinuxPerfZeroTscConversion::ToTSC(uint64_t nanos) const {
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uint64_t time = nanos - time_zero.value;
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uint64_t quot = time / time_mult;
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uint64_t rem = time % time_mult;
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return (quot << time_shift) + (rem << time_shift) / time_mult;
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}
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json::Value toJSON(const LinuxPerfZeroTscConversion &packet) {
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return json::Value(json::Object{
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{"timeMult", packet.time_mult},
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{"timeShift", packet.time_shift},
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{"timeZero", toJSON(packet.time_zero, /*hex=*/false)},
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});
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}
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bool fromJSON(const json::Value &value, LinuxPerfZeroTscConversion &packet,
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json::Path path) {
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ObjectMapper o(value, path);
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uint64_t time_mult, time_shift;
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if (!(o && o.map("timeMult", time_mult) && o.map("timeShift", time_shift) &&
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o.map("timeZero", packet.time_zero)))
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return false;
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packet.time_mult = time_mult;
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packet.time_shift = time_shift;
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return true;
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}
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bool fromJSON(const json::Value &value, TraceIntelPTGetStateResponse &packet,
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json::Path path) {
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ObjectMapper o(value, path);
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return o && fromJSON(value, (TraceGetStateResponse &)packet, path) &&
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o.map("tscPerfZeroConversion", packet.tsc_perf_zero_conversion) &&
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o.map("usingCgroupFiltering", packet.using_cgroup_filtering);
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}
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json::Value toJSON(const TraceIntelPTGetStateResponse &packet) {
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json::Value base = toJSON((const TraceGetStateResponse &)packet);
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json::Object &obj = *base.getAsObject();
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obj.insert({"tscPerfZeroConversion", packet.tsc_perf_zero_conversion});
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obj.insert({"usingCgroupFiltering", packet.using_cgroup_filtering});
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return base;
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}
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} // namespace lldb_private
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