laconicd/ethereum/rpc/namespaces/debug/internal.go

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rpc: implement internal `debug_` API namespace functions (#313) * API Hello World * Added all the debug functions + more data to try implementing the GC functions * Getting transactions information * Added cpu profile first approach functions * new struct for cpuprofile and read filename from params * cpuprofile, gcstats and memstats * added comment * All endpoints returns error instead of string * Code cleanup * Changed errors messages to match go-eth returns * Removed activated flag and just using the file to check if it's running * Added new endpoints to the json_rpc.md file * GoTrace debug endpoints added * Block profile endpoint added * missing goeth calls * added debug logs * divide debug and internal api * Using ExpandHome on server configuration * Added rpc changes to changelog * Logging go trace status * Removed logger functions and moved logger errors to debug * Added more logs to go trace * Added more datailed changelog * Removed trace debug api interface * added comments * cleanup * Updated changelog * disable lint on cpuprofile rename Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com> * return error in StopCpuProfile Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com> * return error in StopGoTrace Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com> * implement suggested changes Co-authored-by: ramacarlucho <ramirocarlucho@gmail.com> Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
2021-07-20 12:50:17 +00:00
package debug
import (
"bytes"
"errors"
"io"
"os"
"runtime"
"runtime/debug"
"runtime/pprof"
"sync"
"time"
"github.com/cosmos/cosmos-sdk/server"
"github.com/tendermint/tendermint/libs/log"
)
// HandlerT keeps track of the cpu profiler and trace execution
type HandlerT struct {
cpuFilename string
cpuFile io.WriteCloser
mu sync.Mutex
traceFilename string
traceFile io.WriteCloser
}
// InternalAPI is the debug_ prefixed set of APIs in the Debug JSON-RPC spec.
type InternalAPI struct {
ctx *server.Context
logger log.Logger
handler *HandlerT
}
// NewInternalAPI creates an instance of the Debug API.
func NewInternalAPI(
ctx *server.Context,
) *InternalAPI {
return &InternalAPI{
ctx: ctx,
logger: ctx.Logger.With("module", "debug"),
handler: new(HandlerT),
}
}
// BlockProfile turns on goroutine profiling for nsec seconds and writes profile data to
// file. It uses a profile rate of 1 for most accurate information. If a different rate is
// desired, set the rate and write the profile manually.
func (a *InternalAPI) BlockProfile(file string, nsec uint) error {
a.logger.Debug("debug_blockProfile", "file", file, "nsec", nsec)
runtime.SetBlockProfileRate(1)
defer runtime.SetBlockProfileRate(0)
time.Sleep(time.Duration(nsec) * time.Second)
return writeProfile("block", file, a.logger)
}
// CpuProfile turns on CPU profiling for nsec seconds and writes
// profile data to file.
func (a *InternalAPI) CpuProfile(file string, nsec uint) error { // nolint: golint
a.logger.Debug("debug_cpuProfile", "file", file, "nsec", nsec)
if err := a.StartCPUProfile(file); err != nil {
return err
}
time.Sleep(time.Duration(nsec) * time.Second)
return a.StopCPUProfile()
}
// GcStats returns GC statistics.
func (a *InternalAPI) GcStats() *debug.GCStats {
a.logger.Debug("debug_gcStats")
s := new(debug.GCStats)
debug.ReadGCStats(s)
return s
}
// GoTrace turns on tracing for nsec seconds and writes
// trace data to file.
func (a *InternalAPI) GoTrace(file string, nsec uint) error {
a.logger.Debug("debug_goTrace", "file", file, "nsec", nsec)
if err := a.StartGoTrace(file); err != nil {
return err
}
time.Sleep(time.Duration(nsec) * time.Second)
return a.StopGoTrace()
}
// MemStats returns detailed runtime memory statistics.
func (a *InternalAPI) MemStats() *runtime.MemStats {
a.logger.Debug("debug_memStats")
s := new(runtime.MemStats)
runtime.ReadMemStats(s)
return s
}
// SetBlockProfileRate sets the rate of goroutine block profile data collection.
// rate 0 disables block profiling.
func (a *InternalAPI) SetBlockProfileRate(rate int) {
a.logger.Debug("debug_setBlockProfileRate", "rate", rate)
runtime.SetBlockProfileRate(rate)
}
// Stacks returns a printed representation of the stacks of all goroutines.
func (a *InternalAPI) Stacks() string {
a.logger.Debug("debug_stacks")
buf := new(bytes.Buffer)
err := pprof.Lookup("goroutine").WriteTo(buf, 2)
if err != nil {
a.logger.Error("Failed to create stacks", "error", err.Error())
}
return buf.String()
}
// StartCPUProfile turns on CPU profiling, writing to the given file.
func (a *InternalAPI) StartCPUProfile(file string) error {
a.logger.Debug("debug_startCPUProfile", "file", file)
a.handler.mu.Lock()
defer a.handler.mu.Unlock()
switch {
case isCPUProfileConfigurationActivated(a.ctx):
a.logger.Debug("CPU profiling already in progress using the configuration file")
return errors.New("CPU profiling already in progress using the configuration file")
case a.handler.cpuFile != nil:
a.logger.Debug("CPU profiling already in progress")
return errors.New("CPU profiling already in progress")
default:
f, err := os.Create(ExpandHome(file))
if err != nil {
a.logger.Debug("failed to create CPU profile file", "error", err.Error())
return err
}
if err := pprof.StartCPUProfile(f); err != nil {
a.logger.Debug("cpu profiling already in use", "error", err.Error())
f.Close()
return err
}
a.logger.Info("CPU profiling started", "profile", file)
a.handler.cpuFile = f
a.handler.cpuFilename = file
return nil
}
}
// StopCPUProfile stops an ongoing CPU profile.
func (a *InternalAPI) StopCPUProfile() error {
a.logger.Debug("debug_stopCPUProfile")
a.handler.mu.Lock()
defer a.handler.mu.Unlock()
switch {
case isCPUProfileConfigurationActivated(a.ctx):
a.logger.Debug("CPU profiling already in progress using the configuration file")
return errors.New("CPU profiling already in progress using the configuration file")
case a.handler.cpuFile != nil:
a.logger.Info("Done writing CPU profile", "profile", a.handler.cpuFilename)
pprof.StopCPUProfile()
a.handler.cpuFile.Close()
a.handler.cpuFile = nil
a.handler.cpuFilename = ""
return nil
default:
a.logger.Debug("CPU profiling not in progress")
return errors.New("CPU profiling not in progress")
}
}
// WriteBlockProfile writes a goroutine blocking profile to the given file.
func (a *InternalAPI) WriteBlockProfile(file string) error {
a.logger.Debug("debug_writeBlockProfile", "file", file)
return writeProfile("block", file, a.logger)
}
// WriteMemProfile writes an allocation profile to the given file.
// Note that the profiling rate cannot be set through the API,
// it must be set on the command line.
func (a *InternalAPI) WriteMemProfile(file string) error {
a.logger.Debug("debug_writeMemProfile", "file", file)
return writeProfile("heap", file, a.logger)
}
// MutexProfile turns on mutex profiling for nsec seconds and writes profile data to file.
// It uses a profile rate of 1 for most accurate information. If a different rate is
// desired, set the rate and write the profile manually.
func (a *InternalAPI) MutexProfile(file string, nsec uint) error {
a.logger.Debug("debug_mutexProfile", "file", file, "nsec", nsec)
runtime.SetMutexProfileFraction(1)
time.Sleep(time.Duration(nsec) * time.Second)
defer runtime.SetMutexProfileFraction(0)
return writeProfile("mutex", file, a.logger)
}
// SetMutexProfileFraction sets the rate of mutex profiling.
func (a *InternalAPI) SetMutexProfileFraction(rate int) {
a.logger.Debug("debug_setMutexProfileFraction", "rate", rate)
runtime.SetMutexProfileFraction(rate)
}
// WriteMutexProfile writes a goroutine blocking profile to the given file.
func (a *InternalAPI) WriteMutexProfile(file string) error {
a.logger.Debug("debug_writeMutexProfile", "file", file)
return writeProfile("mutex", file, a.logger)
}
// FreeOSMemory forces a garbage collection.
func (a *InternalAPI) FreeOSMemory() {
a.logger.Debug("debug_freeOSMemory")
debug.FreeOSMemory()
}
// SetGCPercent sets the garbage collection target percentage. It returns the previous
// setting. A negative value disables GC.
func (a *InternalAPI) SetGCPercent(v int) int {
a.logger.Debug("debug_setGCPercent", "percent", v)
return debug.SetGCPercent(v)
}