Somewhat okay refactoring

This commit is contained in:
Harshavardhan Musanalli
2025-11-08 21:48:59 +01:00
parent 794111cb44
commit c268a3a42e
12 changed files with 280 additions and 479 deletions

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@@ -0,0 +1,343 @@
package ebpf
import (
"bufio"
"io"
"regexp"
"strconv"
"strings"
"time"
)
// EventScanner parses bpftrace output and converts it to TraceEvent structs
type EventScanner struct {
scanner *bufio.Scanner
lastEvent *TraceEvent
lineRegex *regexp.Regexp
}
// NewEventScanner creates a new event scanner for parsing bpftrace output
func NewEventScanner(reader io.Reader) *EventScanner {
// Regex pattern to match our trace output format:
// TRACE|timestamp|pid|tid|comm|function|message
pattern := `^TRACE\|(\d+)\|(\d+)\|(\d+)\|([^|]+)\|([^|]+)\|(.*)$`
regex, _ := regexp.Compile(pattern)
return &EventScanner{
scanner: bufio.NewScanner(reader),
lineRegex: regex,
}
}
// Scan advances the scanner to the next event
func (es *EventScanner) Scan() bool {
for es.scanner.Scan() {
line := strings.TrimSpace(es.scanner.Text())
// Skip empty lines and non-trace lines
if line == "" || !strings.HasPrefix(line, "TRACE|") {
continue
}
// Parse the trace line
if event := es.parseLine(line); event != nil {
es.lastEvent = event
return true
}
}
return false
}
// Event returns the most recently parsed event
func (es *EventScanner) Event() *TraceEvent {
return es.lastEvent
}
// Error returns any scanning error
func (es *EventScanner) Error() error {
return es.scanner.Err()
}
// parseLine parses a single trace line into a TraceEvent
func (es *EventScanner) parseLine(line string) *TraceEvent {
matches := es.lineRegex.FindStringSubmatch(line)
if len(matches) != 7 {
return nil
}
// Parse timestamp (nanoseconds)
timestamp, err := strconv.ParseInt(matches[1], 10, 64)
if err != nil {
return nil
}
// Parse PID
pid, err := strconv.Atoi(matches[2])
if err != nil {
return nil
}
// Parse TID
tid, err := strconv.Atoi(matches[3])
if err != nil {
return nil
}
// Extract process name, function, and message
processName := strings.TrimSpace(matches[4])
function := strings.TrimSpace(matches[5])
message := strings.TrimSpace(matches[6])
event := &TraceEvent{
Timestamp: timestamp,
PID: pid,
TID: tid,
ProcessName: processName,
Function: function,
Message: message,
RawArgs: make(map[string]string),
}
// Try to extract additional information from the message
es.enrichEvent(event, message)
return event
}
// enrichEvent extracts additional information from the message
func (es *EventScanner) enrichEvent(event *TraceEvent, message string) {
// Parse common patterns in messages to extract arguments
// This is a simplified version - in a real implementation you'd want more sophisticated parsing
// Look for patterns like "arg1=value, arg2=value"
argPattern := regexp.MustCompile(`(\w+)=([^,\s]+)`)
matches := argPattern.FindAllStringSubmatch(message, -1)
for _, match := range matches {
if len(match) == 3 {
event.RawArgs[match[1]] = match[2]
}
}
// Look for numeric patterns that might be syscall arguments
numberPattern := regexp.MustCompile(`\b(\d+)\b`)
numbers := numberPattern.FindAllString(message, -1)
for i, num := range numbers {
argName := "arg" + strconv.Itoa(i+1)
event.RawArgs[argName] = num
}
}
// TraceEventFilter provides filtering capabilities for trace events
type TraceEventFilter struct {
MinTimestamp int64
MaxTimestamp int64
ProcessNames []string
PIDs []int
UIDs []int
Functions []string
MessageFilter string
}
// ApplyFilter applies filters to a slice of events
func (filter *TraceEventFilter) ApplyFilter(events []TraceEvent) []TraceEvent {
if filter == nil {
return events
}
var filtered []TraceEvent
for _, event := range events {
if filter.matchesEvent(&event) {
filtered = append(filtered, event)
}
}
return filtered
}
// matchesEvent checks if an event matches the filter criteria
func (filter *TraceEventFilter) matchesEvent(event *TraceEvent) bool {
// Check timestamp range
if filter.MinTimestamp > 0 && event.Timestamp < filter.MinTimestamp {
return false
}
if filter.MaxTimestamp > 0 && event.Timestamp > filter.MaxTimestamp {
return false
}
// Check process names
if len(filter.ProcessNames) > 0 {
found := false
for _, name := range filter.ProcessNames {
if strings.Contains(event.ProcessName, name) {
found = true
break
}
}
if !found {
return false
}
}
// Check PIDs
if len(filter.PIDs) > 0 {
found := false
for _, pid := range filter.PIDs {
if event.PID == pid {
found = true
break
}
}
if !found {
return false
}
}
// Check UIDs
if len(filter.UIDs) > 0 {
found := false
for _, uid := range filter.UIDs {
if event.UID == uid {
found = true
break
}
}
if !found {
return false
}
}
// Check functions
if len(filter.Functions) > 0 {
found := false
for _, function := range filter.Functions {
if strings.Contains(event.Function, function) {
found = true
break
}
}
if !found {
return false
}
}
// Check message filter
if filter.MessageFilter != "" {
if !strings.Contains(event.Message, filter.MessageFilter) {
return false
}
}
return true
}
// TraceEventAggregator provides aggregation capabilities for trace events
type TraceEventAggregator struct {
events []TraceEvent
}
// NewTraceEventAggregator creates a new event aggregator
func NewTraceEventAggregator(events []TraceEvent) *TraceEventAggregator {
return &TraceEventAggregator{
events: events,
}
}
// CountByProcess returns event counts grouped by process
func (agg *TraceEventAggregator) CountByProcess() map[string]int {
counts := make(map[string]int)
for _, event := range agg.events {
counts[event.ProcessName]++
}
return counts
}
// CountByFunction returns event counts grouped by function
func (agg *TraceEventAggregator) CountByFunction() map[string]int {
counts := make(map[string]int)
for _, event := range agg.events {
counts[event.Function]++
}
return counts
}
// CountByPID returns event counts grouped by PID
func (agg *TraceEventAggregator) CountByPID() map[int]int {
counts := make(map[int]int)
for _, event := range agg.events {
counts[event.PID]++
}
return counts
}
// GetTimeRange returns the time range of events
func (agg *TraceEventAggregator) GetTimeRange() (int64, int64) {
if len(agg.events) == 0 {
return 0, 0
}
minTime := agg.events[0].Timestamp
maxTime := agg.events[0].Timestamp
for _, event := range agg.events {
if event.Timestamp < minTime {
minTime = event.Timestamp
}
if event.Timestamp > maxTime {
maxTime = event.Timestamp
}
}
return minTime, maxTime
}
// GetEventRate calculates events per second
func (agg *TraceEventAggregator) GetEventRate() float64 {
if len(agg.events) < 2 {
return 0
}
minTime, maxTime := agg.GetTimeRange()
durationNs := maxTime - minTime
durationSeconds := float64(durationNs) / float64(time.Second)
if durationSeconds == 0 {
return 0
}
return float64(len(agg.events)) / durationSeconds
}
// GetTopProcesses returns the most active processes
func (agg *TraceEventAggregator) GetTopProcesses(limit int) []ProcessStat {
counts := agg.CountByProcess()
total := len(agg.events)
var stats []ProcessStat
for processName, count := range counts {
percentage := float64(count) / float64(total) * 100
stats = append(stats, ProcessStat{
ProcessName: processName,
EventCount: count,
Percentage: percentage,
})
}
// Simple sorting by event count (bubble sort for simplicity)
for i := 0; i < len(stats); i++ {
for j := i + 1; j < len(stats); j++ {
if stats[j].EventCount > stats[i].EventCount {
stats[i], stats[j] = stats[j], stats[i]
}
}
}
if limit > 0 && limit < len(stats) {
stats = stats[:limit]
}
return stats
}

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package ebpf
import (
"context"
"fmt"
"io"
"os"
"os/exec"
"strings"
"sync"
"time"
"nannyagentv2/internal/logging"
)
// TraceSpec represents a trace specification similar to BCC trace.py
type TraceSpec struct {
// Probe type: "p" (kprobe), "r" (kretprobe), "t" (tracepoint), "u" (uprobe)
ProbeType string `json:"probe_type"`
// Target function/syscall/tracepoint
Target string `json:"target"`
// Library for userspace probes (empty for kernel)
Library string `json:"library,omitempty"`
// Format string for output (e.g., "read %d bytes", arg3)
Format string `json:"format"`
// Arguments to extract (e.g., ["arg1", "arg2", "retval"])
Arguments []string `json:"arguments"`
// Filter condition (e.g., "arg3 > 20000")
Filter string `json:"filter,omitempty"`
// Duration in seconds
Duration int `json:"duration"`
// Process ID filter (optional)
PID int `json:"pid,omitempty"`
// Thread ID filter (optional)
TID int `json:"tid,omitempty"`
// UID filter (optional)
UID int `json:"uid,omitempty"`
// Process name filter (optional)
ProcessName string `json:"process_name,omitempty"`
}
// TraceEvent represents a captured event from eBPF
type TraceEvent struct {
Timestamp int64 `json:"timestamp"`
PID int `json:"pid"`
TID int `json:"tid"`
UID int `json:"uid"`
ProcessName string `json:"process_name"`
Function string `json:"function"`
Message string `json:"message"`
RawArgs map[string]string `json:"raw_args"`
CPU int `json:"cpu,omitempty"`
}
// TraceResult represents the results of a tracing session
type TraceResult struct {
TraceID string `json:"trace_id"`
Spec TraceSpec `json:"spec"`
Events []TraceEvent `json:"events"`
EventCount int `json:"event_count"`
StartTime time.Time `json:"start_time"`
EndTime time.Time `json:"end_time"`
Summary string `json:"summary"`
Statistics TraceStats `json:"statistics"`
}
// TraceStats provides statistics about the trace
type TraceStats struct {
TotalEvents int `json:"total_events"`
EventsByProcess map[string]int `json:"events_by_process"`
EventsByUID map[int]int `json:"events_by_uid"`
EventsPerSecond float64 `json:"events_per_second"`
TopProcesses []ProcessStat `json:"top_processes"`
}
// ProcessStat represents statistics for a process
type ProcessStat struct {
ProcessName string `json:"process_name"`
PID int `json:"pid"`
EventCount int `json:"event_count"`
Percentage float64 `json:"percentage"`
}
// BCCTraceManager implements advanced eBPF tracing similar to BCC trace.py
type BCCTraceManager struct {
traces map[string]*RunningTrace
tracesLock sync.RWMutex
traceCounter int
capabilities map[string]bool
}
// RunningTrace represents an active trace session
type RunningTrace struct {
ID string
Spec TraceSpec
Process *exec.Cmd
Events []TraceEvent
StartTime time.Time
Cancel context.CancelFunc
Context context.Context
Done chan struct{} // Signal when trace monitoring is complete
}
// NewBCCTraceManager creates a new BCC-style trace manager
func NewBCCTraceManager() *BCCTraceManager {
manager := &BCCTraceManager{
traces: make(map[string]*RunningTrace),
capabilities: make(map[string]bool),
}
manager.testCapabilities()
return manager
}
// testCapabilities checks what tracing capabilities are available
func (tm *BCCTraceManager) testCapabilities() {
// Test if bpftrace is available
if _, err := exec.LookPath("bpftrace"); err == nil {
tm.capabilities["bpftrace"] = true
} else {
tm.capabilities["bpftrace"] = false
}
// Test if perf is available for fallback
if _, err := exec.LookPath("perf"); err == nil {
tm.capabilities["perf"] = true
} else {
tm.capabilities["perf"] = false
}
// Test root privileges (required for eBPF)
tm.capabilities["root_access"] = os.Geteuid() == 0
// Test kernel version
cmd := exec.Command("uname", "-r")
output, err := cmd.Output()
if err == nil {
version := strings.TrimSpace(string(output))
// eBPF requires kernel 4.4+
tm.capabilities["kernel_ebpf"] = !strings.HasPrefix(version, "3.")
} else {
tm.capabilities["kernel_ebpf"] = false
}
// Test if we can access debugfs
if _, err := os.Stat("/sys/kernel/debug/tracing/available_events"); err == nil {
tm.capabilities["debugfs_access"] = true
} else {
tm.capabilities["debugfs_access"] = false
}
logging.Debug("BCC Trace capabilities: %+v", tm.capabilities)
}
// GetCapabilities returns available tracing capabilities
func (tm *BCCTraceManager) GetCapabilities() map[string]bool {
tm.tracesLock.RLock()
defer tm.tracesLock.RUnlock()
caps := make(map[string]bool)
for k, v := range tm.capabilities {
caps[k] = v
}
return caps
}
// StartTrace starts a new trace session based on the specification
func (tm *BCCTraceManager) StartTrace(spec TraceSpec) (string, error) {
if !tm.capabilities["bpftrace"] {
return "", fmt.Errorf("bpftrace not available - install bpftrace package")
}
if !tm.capabilities["root_access"] {
return "", fmt.Errorf("root access required for eBPF tracing")
}
if !tm.capabilities["kernel_ebpf"] {
return "", fmt.Errorf("kernel version does not support eBPF")
}
tm.tracesLock.Lock()
defer tm.tracesLock.Unlock()
// Generate trace ID
tm.traceCounter++
traceID := fmt.Sprintf("trace_%d", tm.traceCounter)
// Generate bpftrace script
script, err := tm.generateBpftraceScript(spec)
if err != nil {
return "", fmt.Errorf("failed to generate bpftrace script: %w", err)
}
// Debug: log the generated script
logging.Debug("Generated bpftrace script for %s:\n%s", spec.Target, script)
// Create context with timeout
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(spec.Duration)*time.Second)
// Start bpftrace process
cmd := exec.CommandContext(ctx, "bpftrace", "-e", script)
// Create stdout pipe BEFORE starting
stdout, err := cmd.StdoutPipe()
if err != nil {
cancel()
return "", fmt.Errorf("failed to create stdout pipe: %w", err)
}
trace := &RunningTrace{
ID: traceID,
Spec: spec,
Process: cmd,
Events: []TraceEvent{},
StartTime: time.Now(),
Cancel: cancel,
Context: ctx,
Done: make(chan struct{}), // Initialize completion signal
}
// Start the trace
if err := cmd.Start(); err != nil {
cancel()
return "", fmt.Errorf("failed to start bpftrace: %w", err)
}
tm.traces[traceID] = trace
// Monitor the trace in a goroutine
go tm.monitorTrace(traceID, stdout)
logging.Debug("Started BCC-style trace %s for target %s", traceID, spec.Target)
return traceID, nil
} // generateBpftraceScript generates a bpftrace script based on the trace specification
func (tm *BCCTraceManager) generateBpftraceScript(spec TraceSpec) (string, error) {
var script strings.Builder
// Build probe specification
var probe string
switch spec.ProbeType {
case "p", "": // kprobe (default)
if strings.HasPrefix(spec.Target, "sys_") || strings.HasPrefix(spec.Target, "__x64_sys_") {
probe = fmt.Sprintf("kprobe:%s", spec.Target)
} else {
probe = fmt.Sprintf("kprobe:%s", spec.Target)
}
case "r": // kretprobe
if strings.HasPrefix(spec.Target, "sys_") || strings.HasPrefix(spec.Target, "__x64_sys_") {
probe = fmt.Sprintf("kretprobe:%s", spec.Target)
} else {
probe = fmt.Sprintf("kretprobe:%s", spec.Target)
}
case "t": // tracepoint
// If target already includes tracepoint prefix, use as-is
if strings.HasPrefix(spec.Target, "tracepoint:") {
probe = spec.Target
} else {
probe = fmt.Sprintf("tracepoint:%s", spec.Target)
}
case "u": // uprobe
if spec.Library == "" {
return "", fmt.Errorf("library required for uprobe")
}
probe = fmt.Sprintf("uprobe:%s:%s", spec.Library, spec.Target)
default:
return "", fmt.Errorf("unsupported probe type: %s", spec.ProbeType)
}
// Add BEGIN block
script.WriteString("BEGIN {\n")
script.WriteString(fmt.Sprintf(" printf(\"Starting trace for %s...\\n\");\n", spec.Target))
script.WriteString("}\n\n")
// Build the main probe
script.WriteString(fmt.Sprintf("%s {\n", probe))
// Add filters if specified
if tm.needsFiltering(spec) {
script.WriteString(" if (")
filters := tm.buildFilters(spec)
script.WriteString(strings.Join(filters, " && "))
script.WriteString(") {\n")
}
// Build output format
outputFormat := tm.buildOutputFormat(spec)
script.WriteString(fmt.Sprintf(" printf(\"%s\\n\"", outputFormat))
// Add arguments
args := tm.buildArgumentList(spec)
if len(args) > 0 {
script.WriteString(", ")
script.WriteString(strings.Join(args, ", "))
}
script.WriteString(");\n")
// Close filter if block
if tm.needsFiltering(spec) {
script.WriteString(" }\n")
}
script.WriteString("}\n\n")
// Add END block
script.WriteString("END {\n")
script.WriteString(fmt.Sprintf(" printf(\"Trace completed for %s\\n\");\n", spec.Target))
script.WriteString("}\n")
return script.String(), nil
}
// needsFiltering checks if any filters are needed
func (tm *BCCTraceManager) needsFiltering(spec TraceSpec) bool {
return spec.PID != 0 || spec.TID != 0 || spec.UID != -1 ||
spec.ProcessName != "" || spec.Filter != ""
}
// buildFilters builds the filter conditions
func (tm *BCCTraceManager) buildFilters(spec TraceSpec) []string {
var filters []string
if spec.PID != 0 {
filters = append(filters, fmt.Sprintf("pid == %d", spec.PID))
}
if spec.TID != 0 {
filters = append(filters, fmt.Sprintf("tid == %d", spec.TID))
}
if spec.UID != -1 {
filters = append(filters, fmt.Sprintf("uid == %d", spec.UID))
}
if spec.ProcessName != "" {
filters = append(filters, fmt.Sprintf("strncmp(comm, \"%s\", %d) == 0", spec.ProcessName, len(spec.ProcessName)))
}
// Add custom filter
if spec.Filter != "" {
// Convert common patterns to bpftrace syntax
customFilter := strings.ReplaceAll(spec.Filter, "arg", "arg")
filters = append(filters, customFilter)
}
return filters
}
// buildOutputFormat creates the output format string
func (tm *BCCTraceManager) buildOutputFormat(spec TraceSpec) string {
if spec.Format != "" {
// Use custom format
return fmt.Sprintf("TRACE|%%d|%%d|%%d|%%s|%s|%s", spec.Target, spec.Format)
}
// Default format
return fmt.Sprintf("TRACE|%%d|%%d|%%d|%%s|%s|called", spec.Target)
}
// buildArgumentList creates the argument list for printf
func (tm *BCCTraceManager) buildArgumentList(spec TraceSpec) []string {
// Always include timestamp, pid, tid, comm
args := []string{"nsecs", "pid", "tid", "comm"}
// Add custom arguments
for _, arg := range spec.Arguments {
switch arg {
case "arg1", "arg2", "arg3", "arg4", "arg5", "arg6":
args = append(args, fmt.Sprintf("arg%s", strings.TrimPrefix(arg, "arg")))
case "retval":
args = append(args, "retval")
case "cpu":
args = append(args, "cpu")
default:
// Custom expression
args = append(args, arg)
}
}
return args
}
// monitorTrace monitors a running trace and collects events
func (tm *BCCTraceManager) monitorTrace(traceID string, stdout io.ReadCloser) {
tm.tracesLock.Lock()
trace, exists := tm.traces[traceID]
if !exists {
tm.tracesLock.Unlock()
return
}
tm.tracesLock.Unlock()
// Start reading output in a goroutine
go func() {
scanner := NewEventScanner(stdout)
for scanner.Scan() {
event := scanner.Event()
if event != nil {
tm.tracesLock.Lock()
if t, exists := tm.traces[traceID]; exists {
t.Events = append(t.Events, *event)
}
tm.tracesLock.Unlock()
}
}
stdout.Close()
}()
// Wait for the process to complete
err := trace.Process.Wait()
// Clean up
trace.Cancel()
tm.tracesLock.Lock()
if err != nil && err.Error() != "signal: killed" {
logging.Warning("Trace %s completed with error: %v", traceID, err)
} else {
logging.Debug("Trace %s completed successfully with %d events",
traceID, len(trace.Events))
}
// Signal that monitoring is complete
close(trace.Done)
tm.tracesLock.Unlock()
}
// GetTraceResult returns the results of a completed trace
func (tm *BCCTraceManager) GetTraceResult(traceID string) (*TraceResult, error) {
tm.tracesLock.RLock()
trace, exists := tm.traces[traceID]
if !exists {
tm.tracesLock.RUnlock()
return nil, fmt.Errorf("trace %s not found", traceID)
}
tm.tracesLock.RUnlock()
// Wait for trace monitoring to complete
select {
case <-trace.Done:
// Trace monitoring completed
case <-time.After(5 * time.Second):
// Timeout waiting for completion
return nil, fmt.Errorf("timeout waiting for trace %s to complete", traceID)
}
// Now safely read the final results
tm.tracesLock.RLock()
defer tm.tracesLock.RUnlock()
result := &TraceResult{
TraceID: traceID,
Spec: trace.Spec,
Events: make([]TraceEvent, len(trace.Events)),
EventCount: len(trace.Events),
StartTime: trace.StartTime,
EndTime: time.Now(),
}
copy(result.Events, trace.Events)
// Calculate statistics
result.Statistics = tm.calculateStatistics(result.Events, result.EndTime.Sub(result.StartTime))
// Generate summary
result.Summary = tm.generateSummary(result)
return result, nil
}
// calculateStatistics calculates statistics for the trace results
func (tm *BCCTraceManager) calculateStatistics(events []TraceEvent, duration time.Duration) TraceStats {
stats := TraceStats{
TotalEvents: len(events),
EventsByProcess: make(map[string]int),
EventsByUID: make(map[int]int),
}
if duration > 0 {
stats.EventsPerSecond = float64(len(events)) / duration.Seconds()
}
// Calculate per-process and per-UID statistics
for _, event := range events {
stats.EventsByProcess[event.ProcessName]++
stats.EventsByUID[event.UID]++
}
// Calculate top processes
for processName, count := range stats.EventsByProcess {
percentage := float64(count) / float64(len(events)) * 100
stats.TopProcesses = append(stats.TopProcesses, ProcessStat{
ProcessName: processName,
EventCount: count,
Percentage: percentage,
})
}
return stats
}
// generateSummary generates a human-readable summary
func (tm *BCCTraceManager) generateSummary(result *TraceResult) string {
duration := result.EndTime.Sub(result.StartTime)
summary := fmt.Sprintf("Traced %s for %v, captured %d events (%.2f events/sec)",
result.Spec.Target, duration, result.EventCount, result.Statistics.EventsPerSecond)
if len(result.Statistics.TopProcesses) > 0 {
summary += fmt.Sprintf(", top process: %s (%d events)",
result.Statistics.TopProcesses[0].ProcessName,
result.Statistics.TopProcesses[0].EventCount)
}
return summary
}
// StopTrace stops an active trace
func (tm *BCCTraceManager) StopTrace(traceID string) error {
tm.tracesLock.Lock()
defer tm.tracesLock.Unlock()
trace, exists := tm.traces[traceID]
if !exists {
return fmt.Errorf("trace %s not found", traceID)
}
if trace.Process.ProcessState == nil {
// Process is still running, kill it
if err := trace.Process.Process.Kill(); err != nil {
return fmt.Errorf("failed to stop trace: %w", err)
}
}
trace.Cancel()
return nil
}
// ListActiveTraces returns a list of active trace IDs
func (tm *BCCTraceManager) ListActiveTraces() []string {
tm.tracesLock.RLock()
defer tm.tracesLock.RUnlock()
var active []string
for id, trace := range tm.traces {
if trace.Process.ProcessState == nil {
active = append(active, id)
}
}
return active
}
// GetSummary returns a summary of the trace manager state
func (tm *BCCTraceManager) GetSummary() map[string]interface{} {
tm.tracesLock.RLock()
defer tm.tracesLock.RUnlock()
activeCount := 0
completedCount := 0
for _, trace := range tm.traces {
if trace.Process.ProcessState == nil {
activeCount++
} else {
completedCount++
}
}
return map[string]interface{}{
"capabilities": tm.capabilities,
"active_traces": activeCount,
"completed_traces": completedCount,
"total_traces": len(tm.traces),
"active_trace_ids": tm.ListActiveTraces(),
}
}

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package ebpf
import (
"encoding/json"
"fmt"
"strings"
)
// TestTraceSpecs provides test trace specifications for unit testing the BCC-style tracing
// These are used to validate the tracing functionality without requiring remote API calls
var TestTraceSpecs = map[string]TraceSpec{
// Basic system call tracing for testing
"test_sys_open": {
ProbeType: "p",
Target: "__x64_sys_openat",
Format: "opening file: %s",
Arguments: []string{"arg2@user"}, // filename
Duration: 5, // Short duration for testing
},
"test_sys_read": {
ProbeType: "p",
Target: "__x64_sys_read",
Format: "read %d bytes from fd %d",
Arguments: []string{"arg3", "arg1"}, // count, fd
Filter: "arg3 > 100", // Only reads >100 bytes for testing
Duration: 5,
},
"test_sys_write": {
ProbeType: "p",
Target: "__x64_sys_write",
Format: "write %d bytes to fd %d",
Arguments: []string{"arg3", "arg1"}, // count, fd
Duration: 5,
},
"test_process_creation": {
ProbeType: "p",
Target: "__x64_sys_execve",
Format: "exec: %s",
Arguments: []string{"arg1@user"}, // filename
Duration: 5,
},
// Test with different probe types
"test_kretprobe": {
ProbeType: "r",
Target: "__x64_sys_openat",
Format: "open returned: %d",
Arguments: []string{"retval"},
Duration: 5,
},
"test_with_filter": {
ProbeType: "p",
Target: "__x64_sys_write",
Format: "stdout write: %d bytes",
Arguments: []string{"arg3"},
Filter: "arg1 == 1", // Only stdout writes
Duration: 5,
},
}
// GetTestSpec returns a pre-defined test trace specification
func GetTestSpec(name string) (TraceSpec, bool) {
spec, exists := TestTraceSpecs[name]
return spec, exists
}
// ListTestSpecs returns all available test trace specifications
func ListTestSpecs() map[string]string {
descriptions := map[string]string{
"test_sys_open": "Test file open operations",
"test_sys_read": "Test read operations (>100 bytes)",
"test_sys_write": "Test write operations",
"test_process_creation": "Test process execution",
"test_kretprobe": "Test kretprobe on file open",
"test_with_filter": "Test filtered writes to stdout",
}
return descriptions
}
// TraceSpecBuilder helps build custom trace specifications
type TraceSpecBuilder struct {
spec TraceSpec
}
// NewTraceSpecBuilder creates a new trace specification builder
func NewTraceSpecBuilder() *TraceSpecBuilder {
return &TraceSpecBuilder{
spec: TraceSpec{
ProbeType: "p", // Default to kprobe
Duration: 30, // Default 30 seconds
},
}
}
// Kprobe sets up a kernel probe
func (b *TraceSpecBuilder) Kprobe(function string) *TraceSpecBuilder {
b.spec.ProbeType = "p"
b.spec.Target = function
return b
}
// Kretprobe sets up a kernel return probe
func (b *TraceSpecBuilder) Kretprobe(function string) *TraceSpecBuilder {
b.spec.ProbeType = "r"
b.spec.Target = function
return b
}
// Tracepoint sets up a tracepoint
func (b *TraceSpecBuilder) Tracepoint(category, name string) *TraceSpecBuilder {
b.spec.ProbeType = "t"
b.spec.Target = fmt.Sprintf("%s:%s", category, name)
return b
}
// Uprobe sets up a userspace probe
func (b *TraceSpecBuilder) Uprobe(library, function string) *TraceSpecBuilder {
b.spec.ProbeType = "u"
b.spec.Library = library
b.spec.Target = function
return b
}
// Format sets the output format string
func (b *TraceSpecBuilder) Format(format string, args ...string) *TraceSpecBuilder {
b.spec.Format = format
b.spec.Arguments = args
return b
}
// Filter adds a filter condition
func (b *TraceSpecBuilder) Filter(condition string) *TraceSpecBuilder {
b.spec.Filter = condition
return b
}
// Duration sets the trace duration in seconds
func (b *TraceSpecBuilder) Duration(seconds int) *TraceSpecBuilder {
b.spec.Duration = seconds
return b
}
// PID filters by process ID
func (b *TraceSpecBuilder) PID(pid int) *TraceSpecBuilder {
b.spec.PID = pid
return b
}
// UID filters by user ID
func (b *TraceSpecBuilder) UID(uid int) *TraceSpecBuilder {
b.spec.UID = uid
return b
}
// ProcessName filters by process name
func (b *TraceSpecBuilder) ProcessName(name string) *TraceSpecBuilder {
b.spec.ProcessName = name
return b
}
// Build returns the constructed trace specification
func (b *TraceSpecBuilder) Build() TraceSpec {
return b.spec
}
// TraceSpecParser parses trace specifications from various formats
type TraceSpecParser struct{}
// NewTraceSpecParser creates a new parser
func NewTraceSpecParser() *TraceSpecParser {
return &TraceSpecParser{}
}
// ParseFromBCCStyle parses BCC trace.py style specifications
// Examples:
//
// "sys_open" -> trace sys_open syscall
// "p::do_sys_open" -> kprobe on do_sys_open
// "r::do_sys_open" -> kretprobe on do_sys_open
// "t:syscalls:sys_enter_open" -> tracepoint
// "sys_read (arg3 > 1024)" -> with filter
// "sys_read \"read %d bytes\", arg3" -> with format
func (p *TraceSpecParser) ParseFromBCCStyle(spec string) (TraceSpec, error) {
result := TraceSpec{
ProbeType: "p",
Duration: 30,
}
// Split by quotes to separate format string
parts := strings.Split(spec, "\"")
var probeSpec string
if len(parts) >= 1 {
probeSpec = strings.TrimSpace(parts[0])
}
var formatPart string
if len(parts) >= 2 {
formatPart = parts[1]
}
var argsPart string
if len(parts) >= 3 {
argsPart = strings.TrimSpace(parts[2])
if strings.HasPrefix(argsPart, ",") {
argsPart = strings.TrimSpace(argsPart[1:])
}
}
// Parse probe specification
if err := p.parseProbeSpec(probeSpec, &result); err != nil {
return result, err
}
// Parse format string
if formatPart != "" {
result.Format = formatPart
}
// Parse arguments
if argsPart != "" {
result.Arguments = p.parseArguments(argsPart)
}
return result, nil
}
// parseProbeSpec parses the probe specification part
func (p *TraceSpecParser) parseProbeSpec(spec string, result *TraceSpec) error {
// Handle filter conditions in parentheses
if idx := strings.Index(spec, "("); idx != -1 {
filterEnd := strings.LastIndex(spec, ")")
if filterEnd > idx {
result.Filter = strings.TrimSpace(spec[idx+1 : filterEnd])
spec = strings.TrimSpace(spec[:idx])
}
}
// Parse probe type and target
if strings.Contains(spec, ":") {
parts := strings.SplitN(spec, ":", 3)
if len(parts) >= 1 && parts[0] != "" {
switch parts[0] {
case "p":
result.ProbeType = "p"
case "r":
result.ProbeType = "r"
case "t":
result.ProbeType = "t"
case "u":
result.ProbeType = "u"
default:
return fmt.Errorf("unsupported probe type: %s", parts[0])
}
}
if len(parts) >= 2 {
result.Library = parts[1]
}
if len(parts) >= 3 {
result.Target = parts[2]
} else if len(parts) == 2 {
result.Target = parts[1]
result.Library = ""
}
} else {
// Simple function name
result.Target = spec
// Auto-detect syscall format
if strings.HasPrefix(spec, "sys_") && !strings.HasPrefix(spec, "__x64_sys_") {
result.Target = "__x64_sys_" + spec[4:]
}
}
return nil
}
// parseArguments parses the arguments part
func (p *TraceSpecParser) parseArguments(args string) []string {
var result []string
// Split by comma and clean up
parts := strings.Split(args, ",")
for _, part := range parts {
arg := strings.TrimSpace(part)
if arg != "" {
result = append(result, arg)
}
}
return result
}
// ParseFromJSON parses trace specification from JSON
func (p *TraceSpecParser) ParseFromJSON(jsonData []byte) (TraceSpec, error) {
var spec TraceSpec
err := json.Unmarshal(jsonData, &spec)
return spec, err
}
// GetCommonSpec returns a pre-defined test trace specification (renamed for backward compatibility)
func GetCommonSpec(name string) (TraceSpec, bool) {
// Map old names to new test names for compatibility
testName := name
if strings.HasPrefix(name, "trace_") {
testName = strings.Replace(name, "trace_", "test_", 1)
}
spec, exists := TestTraceSpecs[testName]
return spec, exists
}
// ListCommonSpecs returns all available test trace specifications (renamed for backward compatibility)
func ListCommonSpecs() map[string]string {
return ListTestSpecs()
}
// ValidateTraceSpec validates a trace specification
func ValidateTraceSpec(spec TraceSpec) error {
if spec.Target == "" {
return fmt.Errorf("target function/syscall is required")
}
if spec.Duration <= 0 {
return fmt.Errorf("duration must be positive")
}
if spec.Duration > 600 { // 10 minutes max
return fmt.Errorf("duration too long (max 600 seconds)")
}
switch spec.ProbeType {
case "p", "r", "t", "u":
// Valid probe types
case "":
// Default to kprobe
default:
return fmt.Errorf("unsupported probe type: %s", spec.ProbeType)
}
if spec.ProbeType == "u" && spec.Library == "" {
return fmt.Errorf("library required for userspace probes")
}
if spec.ProbeType == "t" && !strings.Contains(spec.Target, ":") {
return fmt.Errorf("tracepoint requires format 'category:name'")
}
return nil
}
// SuggestSyscallTargets suggests syscall targets based on the issue description
func SuggestSyscallTargets(issueDescription string) []string {
description := strings.ToLower(issueDescription)
var suggestions []string
// File I/O issues
if strings.Contains(description, "file") || strings.Contains(description, "disk") || strings.Contains(description, "io") {
suggestions = append(suggestions, "trace_sys_open", "trace_sys_read", "trace_sys_write", "trace_sys_unlink")
}
// Network issues
if strings.Contains(description, "network") || strings.Contains(description, "socket") || strings.Contains(description, "connection") {
suggestions = append(suggestions, "trace_sys_connect", "trace_sys_socket", "trace_sys_bind", "trace_sys_accept")
}
// Process issues
if strings.Contains(description, "process") || strings.Contains(description, "crash") || strings.Contains(description, "exec") {
suggestions = append(suggestions, "trace_sys_execve", "trace_sys_clone", "trace_sys_exit", "trace_sys_kill")
}
// Memory issues
if strings.Contains(description, "memory") || strings.Contains(description, "malloc") || strings.Contains(description, "leak") {
suggestions = append(suggestions, "trace_sys_mmap", "trace_sys_brk")
}
// Performance issues - trace common syscalls
if strings.Contains(description, "slow") || strings.Contains(description, "performance") || strings.Contains(description, "hang") {
suggestions = append(suggestions, "trace_sys_read", "trace_sys_write", "trace_sys_connect", "trace_sys_mmap")
}
// If no specific suggestions, provide general monitoring
if len(suggestions) == 0 {
suggestions = append(suggestions, "trace_sys_execve", "trace_sys_open", "trace_sys_connect")
}
return suggestions
}

View File

@@ -0,0 +1,921 @@
package ebpf
import (
"encoding/json"
"fmt"
"os"
"strings"
"testing"
"time"
)
// TestBCCTracing demonstrates and tests the new BCC-style tracing functionality
// This test documents the expected behavior and response format of the agent
func TestBCCTracing(t *testing.T) {
fmt.Println("=== BCC-Style eBPF Tracing Unit Tests ===")
fmt.Println()
// Test 1: List available test specifications
t.Run("ListTestSpecs", func(t *testing.T) {
specs := ListTestSpecs()
fmt.Printf("📋 Available Test Specifications:\n")
for name, description := range specs {
fmt.Printf(" - %s: %s\n", name, description)
}
fmt.Println()
if len(specs) == 0 {
t.Error("No test specifications available")
}
})
// Test 2: Parse BCC-style specifications
t.Run("ParseBCCStyle", func(t *testing.T) {
parser := NewTraceSpecParser()
testCases := []struct {
input string
expected string
}{
{
input: "sys_open",
expected: "__x64_sys_open",
},
{
input: "p::do_sys_open",
expected: "do_sys_open",
},
{
input: "r::sys_read",
expected: "sys_read",
},
{
input: "sys_write (arg1 == 1)",
expected: "__x64_sys_write",
},
}
fmt.Printf("🔍 Testing BCC-style parsing:\n")
for _, tc := range testCases {
spec, err := parser.ParseFromBCCStyle(tc.input)
if err != nil {
t.Errorf("Failed to parse '%s': %v", tc.input, err)
continue
}
fmt.Printf(" Input: '%s' -> Target: '%s', Type: '%s'\n",
tc.input, spec.Target, spec.ProbeType)
if spec.Target != tc.expected {
t.Errorf("Expected target '%s', got '%s'", tc.expected, spec.Target)
}
}
fmt.Println()
})
// Test 3: Validate trace specifications
t.Run("ValidateSpecs", func(t *testing.T) {
fmt.Printf("✅ Testing trace specification validation:\n")
// Valid spec
validSpec := TraceSpec{
ProbeType: "p",
Target: "__x64_sys_openat",
Format: "opening file",
Duration: 5,
}
if err := ValidateTraceSpec(validSpec); err != nil {
t.Errorf("Valid spec failed validation: %v", err)
} else {
fmt.Printf(" ✓ Valid specification passed\n")
}
// Invalid spec - no target
invalidSpec := TraceSpec{
ProbeType: "p",
Duration: 5,
}
if err := ValidateTraceSpec(invalidSpec); err == nil {
t.Error("Invalid spec (no target) should have failed validation")
} else {
fmt.Printf(" ✓ Invalid specification correctly rejected: %s\n", err.Error())
}
fmt.Println()
})
// Test 4: Simulate agent response format
t.Run("SimulateAgentResponse", func(t *testing.T) {
fmt.Printf("🤖 Simulating agent response for BCC-style tracing:\n")
// Get a test specification
testSpec, exists := GetTestSpec("test_sys_open")
if !exists {
t.Fatal("test_sys_open specification not found")
}
// Simulate what the agent would return
mockResponse := simulateTraceExecution(testSpec)
// Print the response format
responseJSON, _ := json.MarshalIndent(mockResponse, "", " ")
fmt.Printf(" Expected Response Format:\n%s\n", string(responseJSON))
// Validate response structure
if mockResponse["success"] != true {
t.Error("Expected successful trace execution")
}
if mockResponse["type"] != "bcc_trace" {
t.Error("Expected type to be 'bcc_trace'")
}
events, hasEvents := mockResponse["events"].([]TraceEvent)
if !hasEvents || len(events) == 0 {
t.Error("Expected trace events in response")
}
fmt.Println()
})
// Test 5: Test different probe types
t.Run("TestProbeTypes", func(t *testing.T) {
fmt.Printf("🔬 Testing different probe types:\n")
probeTests := []struct {
specName string
expected string
}{
{"test_sys_open", "kprobe"},
{"test_kretprobe", "kretprobe"},
{"test_with_filter", "kprobe with filter"},
}
for _, test := range probeTests {
spec, exists := GetTestSpec(test.specName)
if !exists {
t.Errorf("Test spec '%s' not found", test.specName)
continue
}
response := simulateTraceExecution(spec)
fmt.Printf(" %s -> %s: %d events captured\n",
test.specName, test.expected, response["event_count"])
}
fmt.Println()
})
// Test 6: Test trace spec builder
t.Run("TestTraceSpecBuilder", func(t *testing.T) {
fmt.Printf("🏗️ Testing trace specification builder:\n")
// Build a custom trace spec
spec := NewTraceSpecBuilder().
Kprobe("__x64_sys_write").
Format("write syscall: %d bytes", "arg3").
Filter("arg1 == 1").
Duration(3).
Build()
fmt.Printf(" Built spec: Target=%s, Format=%s, Filter=%s\n",
spec.Target, spec.Format, spec.Filter)
if spec.Target != "__x64_sys_write" {
t.Error("Builder failed to set target correctly")
}
if spec.ProbeType != "p" {
t.Error("Builder failed to set probe type correctly")
}
fmt.Println()
})
}
// simulateTraceExecution simulates what the agent would return for a trace execution
// This documents the expected response format from the agent
func simulateTraceExecution(spec TraceSpec) map[string]interface{} {
// Simulate some trace events
events := []TraceEvent{
{
Timestamp: time.Now().Unix(),
PID: 1234,
TID: 1234,
ProcessName: "test_process",
Function: spec.Target,
Message: fmt.Sprintf(spec.Format, "test_file.txt"),
RawArgs: map[string]string{
"arg1": "5",
"arg2": "test_file.txt",
"arg3": "1024",
},
},
{
Timestamp: time.Now().Unix(),
PID: 5678,
TID: 5678,
ProcessName: "another_process",
Function: spec.Target,
Message: fmt.Sprintf(spec.Format, "data.log"),
RawArgs: map[string]string{
"arg1": "3",
"arg2": "data.log",
"arg3": "512",
},
},
}
// Simulate trace statistics
stats := TraceStats{
TotalEvents: len(events),
EventsByProcess: map[string]int{"test_process": 1, "another_process": 1},
EventsByUID: map[int]int{1000: 2},
EventsPerSecond: float64(len(events)) / float64(spec.Duration),
TopProcesses: []ProcessStat{
{ProcessName: "test_process", EventCount: 1, Percentage: 50.0},
{ProcessName: "another_process", EventCount: 1, Percentage: 50.0},
},
}
// Return the expected agent response format
return map[string]interface{}{
"name": spec.Target,
"type": "bcc_trace",
"target": spec.Target,
"duration": spec.Duration,
"description": fmt.Sprintf("Traced %s for %d seconds", spec.Target, spec.Duration),
"status": "completed",
"success": true,
"event_count": len(events),
"events": events,
"statistics": stats,
"data_points": len(events),
"probe_type": spec.ProbeType,
"format": spec.Format,
"filter": spec.Filter,
}
}
// TestTraceManagerCapabilities tests the trace manager capabilities
func TestTraceManagerCapabilities(t *testing.T) {
fmt.Println("=== BCC Trace Manager Capabilities Test ===")
fmt.Println()
manager := NewBCCTraceManager()
caps := manager.GetCapabilities()
fmt.Printf("🔧 Trace Manager Capabilities:\n")
for capability, available := range caps {
status := "❌ Not Available"
if available {
status = "✅ Available"
}
fmt.Printf(" %s: %s\n", capability, status)
}
fmt.Println()
// Check essential capabilities
if !caps["kernel_ebpf"] {
fmt.Printf("⚠️ Warning: Kernel eBPF support not detected\n")
}
if !caps["bpftrace"] {
fmt.Printf("⚠️ Warning: bpftrace not available (install with: apt install bpftrace)\n")
}
if !caps["root_access"] {
fmt.Printf("⚠️ Warning: Root access required for eBPF tracing\n")
}
}
// BenchmarkTraceSpecParsing benchmarks the trace specification parsing
func BenchmarkTraceSpecParsing(b *testing.B) {
parser := NewTraceSpecParser()
testInput := "sys_open \"opening %s\", arg2@user"
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, err := parser.ParseFromBCCStyle(testInput)
if err != nil {
b.Fatal(err)
}
}
}
// TestSyscallSuggestions tests the syscall suggestion functionality
func TestSyscallSuggestions(t *testing.T) {
fmt.Println("=== Syscall Suggestion Test ===")
fmt.Println()
testCases := []struct {
issue string
expected int // minimum expected suggestions
description string
}{
{
issue: "file not found error",
expected: 1,
description: "File I/O issue should suggest file-related syscalls",
},
{
issue: "network connection timeout",
expected: 1,
description: "Network issue should suggest network syscalls",
},
{
issue: "process crashes randomly",
expected: 1,
description: "Process issue should suggest process-related syscalls",
},
{
issue: "memory leak detected",
expected: 1,
description: "Memory issue should suggest memory syscalls",
},
{
issue: "application is slow",
expected: 1,
description: "Performance issue should suggest monitoring syscalls",
},
}
fmt.Printf("💡 Testing syscall suggestions:\n")
for _, tc := range testCases {
suggestions := SuggestSyscallTargets(tc.issue)
fmt.Printf(" Issue: '%s' -> %d suggestions: %v\n",
tc.issue, len(suggestions), suggestions)
if len(suggestions) < tc.expected {
t.Errorf("Expected at least %d suggestions for '%s', got %d",
tc.expected, tc.issue, len(suggestions))
}
}
fmt.Println()
}
// TestMain runs the tests and provides a summary
func TestMain(m *testing.M) {
fmt.Println("🚀 Starting BCC-Style eBPF Tracing Tests")
fmt.Println("========================================")
fmt.Println()
// Run capability check first
manager := NewBCCTraceManager()
caps := manager.GetCapabilities()
if !caps["kernel_ebpf"] {
fmt.Println("⚠️ Kernel eBPF support not detected - some tests may be limited")
}
if !caps["bpftrace"] {
fmt.Println("⚠️ bpftrace not available - install with: sudo apt install bpftrace")
}
if !caps["root_access"] {
fmt.Println("⚠️ Root access required for actual eBPF tracing")
}
fmt.Println()
// Run the tests
code := m.Run()
fmt.Println()
fmt.Println("========================================")
if code == 0 {
fmt.Println("✅ All BCC-Style eBPF Tracing Tests Passed!")
} else {
fmt.Println("❌ Some tests failed")
}
os.Exit(code)
}
// TestBCCTraceManagerRootTest tests the actual BCC trace manager with root privileges
// This test requires root access and will only run meaningful tests when root
func TestBCCTraceManagerRootTest(t *testing.T) {
fmt.Println("=== BCC Trace Manager Root Test ===")
// Check if running as root
if os.Geteuid() != 0 {
t.Skip("⚠️ Skipping root test - not running as root (use: sudo go test -run TestBCCTraceManagerRootTest)")
return
}
fmt.Println("✅ Running as root - can test actual eBPF functionality")
// Test 1: Create BCC trace manager and check capabilities
manager := NewBCCTraceManager()
caps := manager.GetCapabilities()
fmt.Printf("🔍 BCC Trace Manager Capabilities:\n")
for cap, available := range caps {
status := "❌"
if available {
status = "✅"
}
fmt.Printf(" %s %s: %v\n", status, cap, available)
}
// Require essential capabilities
if !caps["bpftrace"] {
t.Fatal("❌ bpftrace not available - install bpftrace package")
}
if !caps["root_access"] {
t.Fatal("❌ Root access not detected")
}
// Test 2: Create and execute a simple trace
fmt.Println("\n🔬 Testing actual eBPF trace execution...")
spec := TraceSpec{
ProbeType: "t", // tracepoint
Target: "syscalls:sys_enter_openat",
Format: "file access",
Arguments: []string{}, // Remove invalid arg2@user for tracepoints
Duration: 3, // 3 seconds
}
fmt.Printf("📝 Starting trace: %s for %d seconds\n", spec.Target, spec.Duration)
traceID, err := manager.StartTrace(spec)
if err != nil {
t.Fatalf("❌ Failed to start trace: %v", err)
}
fmt.Printf("🚀 Trace started with ID: %s\n", traceID)
// Generate some file access to capture
go func() {
time.Sleep(1 * time.Second)
// Create some file operations to trace
for i := 0; i < 3; i++ {
testFile := fmt.Sprintf("/tmp/bcc_test_%d.txt", i)
// This will trigger sys_openat syscalls
if file, err := os.Create(testFile); err == nil {
file.WriteString("BCC trace test")
file.Close()
os.Remove(testFile)
}
time.Sleep(500 * time.Millisecond)
}
}()
// Wait for trace to complete
time.Sleep(time.Duration(spec.Duration+1) * time.Second)
// Get results
result, err := manager.GetTraceResult(traceID)
if err != nil {
// Try to stop the trace if it's still running
manager.StopTrace(traceID)
t.Fatalf("❌ Failed to get trace results: %v", err)
}
fmt.Printf("\n📊 Trace Results Summary:\n")
fmt.Printf(" • Trace ID: %s\n", result.TraceID)
fmt.Printf(" • Target: %s\n", result.Spec.Target)
fmt.Printf(" • Duration: %v\n", result.EndTime.Sub(result.StartTime))
fmt.Printf(" • Events captured: %d\n", result.EventCount)
fmt.Printf(" • Events per second: %.2f\n", result.Statistics.EventsPerSecond)
fmt.Printf(" • Summary: %s\n", result.Summary)
if len(result.Events) > 0 {
fmt.Printf("\n📝 Sample Events (first 3):\n")
for i, event := range result.Events {
if i >= 3 {
break
}
fmt.Printf(" %d. PID:%d TID:%d Process:%s Message:%s\n",
i+1, event.PID, event.TID, event.ProcessName, event.Message)
}
if len(result.Events) > 3 {
fmt.Printf(" ... and %d more events\n", len(result.Events)-3)
}
}
// Test 3: Validate the trace produced real data
if result.EventCount == 0 {
fmt.Println("⚠️ Warning: No events captured - this might be normal for a quiet system")
} else {
fmt.Printf("✅ Successfully captured %d real eBPF events!\n", result.EventCount)
}
fmt.Println("\n🧪 Testing comprehensive system tracing (Network, Disk, CPU, Memory, Userspace)...")
testSpecs := []TraceSpec{
// === SYSCALL TRACING ===
{
ProbeType: "p", // kprobe
Target: "__x64_sys_write",
Format: "write: fd=%d count=%d",
Arguments: []string{"arg1", "arg3"},
Duration: 2,
},
{
ProbeType: "p", // kprobe
Target: "__x64_sys_read",
Format: "read: fd=%d count=%d",
Arguments: []string{"arg1", "arg3"},
Duration: 2,
},
{
ProbeType: "p", // kprobe
Target: "__x64_sys_connect",
Format: "network connect: fd=%d",
Arguments: []string{"arg1"},
Duration: 2,
},
{
ProbeType: "p", // kprobe
Target: "__x64_sys_accept",
Format: "network accept: fd=%d",
Arguments: []string{"arg1"},
Duration: 2,
},
// === BLOCK I/O TRACING ===
{
ProbeType: "t", // tracepoint
Target: "block:block_io_start",
Format: "block I/O start",
Arguments: []string{},
Duration: 2,
},
{
ProbeType: "t", // tracepoint
Target: "block:block_io_done",
Format: "block I/O complete",
Arguments: []string{},
Duration: 2,
},
// === CPU SCHEDULER TRACING ===
{
ProbeType: "t", // tracepoint
Target: "sched:sched_migrate_task",
Format: "task migration",
Arguments: []string{},
Duration: 2,
},
{
ProbeType: "t", // tracepoint
Target: "sched:sched_pi_setprio",
Format: "priority change",
Arguments: []string{},
Duration: 2,
},
// === MEMORY MANAGEMENT ===
{
ProbeType: "t", // tracepoint
Target: "syscalls:sys_enter_brk",
Format: "memory allocation: brk",
Arguments: []string{},
Duration: 2,
},
// === KERNEL MEMORY TRACING ===
{
ProbeType: "t", // tracepoint
Target: "kmem:kfree",
Format: "kernel memory free",
Arguments: []string{},
Duration: 2,
},
}
for i, testSpec := range testSpecs {
category := "unknown"
if strings.Contains(testSpec.Target, "sys_write") || strings.Contains(testSpec.Target, "sys_read") {
category = "filesystem"
} else if strings.Contains(testSpec.Target, "sys_connect") || strings.Contains(testSpec.Target, "sys_accept") {
category = "network"
} else if strings.Contains(testSpec.Target, "block:") {
category = "disk I/O"
} else if strings.Contains(testSpec.Target, "sched:") {
category = "CPU/scheduler"
} else if strings.Contains(testSpec.Target, "sys_brk") || strings.Contains(testSpec.Target, "kmem:") {
category = "memory"
}
fmt.Printf("\n 🔍 Test %d: [%s] Tracing %s for %d seconds\n", i+1, category, testSpec.Target, testSpec.Duration)
testTraceID, err := manager.StartTrace(testSpec)
if err != nil {
fmt.Printf(" ❌ Failed to start: %v\n", err)
continue
}
// Generate activity specific to this trace type
go func(target, probeType string) {
time.Sleep(500 * time.Millisecond)
switch {
case strings.Contains(target, "sys_write") || strings.Contains(target, "sys_read"):
// Generate file I/O
for j := 0; j < 3; j++ {
testFile := fmt.Sprintf("/tmp/io_test_%d.txt", j)
if file, err := os.Create(testFile); err == nil {
file.WriteString("BCC tracing test data for I/O operations")
file.Sync()
file.Close()
// Read the file back
if readFile, err := os.Open(testFile); err == nil {
buffer := make([]byte, 1024)
readFile.Read(buffer)
readFile.Close()
}
os.Remove(testFile)
}
time.Sleep(200 * time.Millisecond)
}
case strings.Contains(target, "block:"):
// Generate disk I/O to trigger block layer events
for j := 0; j < 3; j++ {
testFile := fmt.Sprintf("/tmp/block_test_%d.txt", j)
if file, err := os.Create(testFile); err == nil {
// Write substantial data to trigger block I/O
data := make([]byte, 1024*4) // 4KB
for k := range data {
data[k] = byte(k % 256)
}
file.Write(data)
file.Sync() // Force write to disk
file.Close()
}
os.Remove(testFile)
time.Sleep(300 * time.Millisecond)
}
case strings.Contains(target, "sched:"):
// Generate CPU activity to trigger scheduler events
go func() {
for j := 0; j < 100; j++ {
// Create short-lived goroutines to trigger scheduler activity
go func() {
time.Sleep(time.Millisecond * 1)
}()
time.Sleep(time.Millisecond * 10)
}
}()
case strings.Contains(target, "sys_brk") || strings.Contains(target, "kmem:"):
// Generate memory allocation activity
for j := 0; j < 5; j++ {
// Allocate and free memory to trigger memory management
data := make([]byte, 1024*1024) // 1MB
for k := range data {
data[k] = byte(k % 256)
}
data = nil // Allow GC
time.Sleep(200 * time.Millisecond)
}
case strings.Contains(target, "sys_connect") || strings.Contains(target, "sys_accept"):
// Network operations (these may not generate events in test environment)
fmt.Printf(" Note: Network syscalls may not trigger events without actual network activity\n")
default:
// Generic activity
for j := 0; j < 3; j++ {
testFile := fmt.Sprintf("/tmp/generic_test_%d.txt", j)
if file, err := os.Create(testFile); err == nil {
file.WriteString("Generic test activity")
file.Close()
}
os.Remove(testFile)
time.Sleep(300 * time.Millisecond)
}
}
}(testSpec.Target, testSpec.ProbeType)
// Wait for trace completion
time.Sleep(time.Duration(testSpec.Duration+1) * time.Second)
testResult, err := manager.GetTraceResult(testTraceID)
if err != nil {
manager.StopTrace(testTraceID)
fmt.Printf(" ⚠️ Result error: %v\n", err)
continue
}
fmt.Printf(" 📊 Results for %s:\n", testSpec.Target)
fmt.Printf(" • Total events: %d\n", testResult.EventCount)
fmt.Printf(" • Events/sec: %.2f\n", testResult.Statistics.EventsPerSecond)
fmt.Printf(" • Duration: %v\n", testResult.EndTime.Sub(testResult.StartTime))
// Show process breakdown
if len(testResult.Statistics.TopProcesses) > 0 {
fmt.Printf(" • Top processes:\n")
for j, proc := range testResult.Statistics.TopProcesses {
if j >= 3 { // Show top 3
break
}
fmt.Printf(" - %s: %d events (%.1f%%)\n",
proc.ProcessName, proc.EventCount, proc.Percentage)
}
}
// Show sample events with PIDs, counts, etc.
if len(testResult.Events) > 0 {
fmt.Printf(" • Sample events:\n")
for j, event := range testResult.Events {
if j >= 5 { // Show first 5 events
break
}
fmt.Printf(" [%d] PID:%d TID:%d Process:%s Message:%s\n",
j+1, event.PID, event.TID, event.ProcessName, event.Message)
}
if len(testResult.Events) > 5 {
fmt.Printf(" ... and %d more events\n", len(testResult.Events)-5)
}
}
if testResult.EventCount > 0 {
fmt.Printf(" ✅ Success: Captured %d real syscall events!\n", testResult.EventCount)
} else {
fmt.Printf(" ⚠️ No events captured (may be normal for this syscall)\n")
}
}
fmt.Println("\n🎉 BCC Trace Manager Root Test Complete!")
fmt.Println("✅ Real eBPF tracing is working and ready for production use!")
}
// TestAgentEBPFIntegration tests the agent's integration with BCC-style eBPF tracing
// This demonstrates the complete flow from agent to eBPF results
func TestAgentEBPFIntegration(t *testing.T) {
if os.Geteuid() != 0 {
t.Skip("⚠️ Skipping agent integration test - requires root access")
return
}
fmt.Println("\n=== Agent eBPF Integration Test ===")
fmt.Println("This test demonstrates the complete agent flow with BCC-style tracing")
// Create eBPF manager directly for testing
manager := NewBCCTraceManager()
// Test multiple syscalls that would be sent by remote API
testEBPFRequests := []struct {
Name string `json:"name"`
Type string `json:"type"`
Target string `json:"target"`
Duration int `json:"duration"`
Description string `json:"description"`
Filters map[string]string `json:"filters"`
}{
{
Name: "file_operations",
Type: "syscall",
Target: "sys_openat", // Will be converted to __x64_sys_openat
Duration: 3,
Description: "trace file open operations",
Filters: map[string]string{},
},
{
Name: "network_operations",
Type: "syscall",
Target: "__x64_sys_connect",
Duration: 2,
Description: "trace network connections",
Filters: map[string]string{},
},
{
Name: "io_operations",
Type: "syscall",
Target: "sys_write",
Duration: 2,
Description: "trace write operations",
Filters: map[string]string{},
},
}
fmt.Printf("🚀 Testing eBPF manager with %d eBPF programs...\n\n", len(testEBPFRequests))
// Convert to trace specs and execute using manager directly
var traceSpecs []TraceSpec
for _, req := range testEBPFRequests {
spec := TraceSpec{
ProbeType: "p", // kprobe
Target: "__x64_" + req.Target,
Format: req.Description,
Duration: req.Duration,
}
traceSpecs = append(traceSpecs, spec)
}
// Execute traces sequentially for testing
var results []map[string]interface{}
for i, spec := range traceSpecs {
fmt.Printf("Starting trace %d: %s\n", i+1, spec.Target)
traceID, err := manager.StartTrace(spec)
if err != nil {
fmt.Printf("Failed to start trace: %v\n", err)
continue
}
// Wait for trace duration
time.Sleep(time.Duration(spec.Duration) * time.Second)
traceResult, err := manager.GetTraceResult(traceID)
if err != nil {
fmt.Printf("Failed to get results: %v\n", err)
continue
}
result := map[string]interface{}{
"name": testEBPFRequests[i].Name,
"target": spec.Target,
"success": true,
"event_count": traceResult.EventCount,
"summary": traceResult.Summary,
}
results = append(results, result)
}
fmt.Printf("📊 Agent eBPF Execution Results:\n")
fmt.Printf("=" + strings.Repeat("=", 50) + "\n\n")
for i, result := range results {
fmt.Printf("🔍 Program %d: %s\n", i+1, result["name"])
fmt.Printf(" Target: %s\n", result["target"])
fmt.Printf(" Type: %s\n", result["type"])
fmt.Printf(" Status: %s\n", result["status"])
fmt.Printf(" Success: %v\n", result["success"])
if result["success"].(bool) {
if eventCount, ok := result["event_count"].(int); ok {
fmt.Printf(" Events captured: %d\n", eventCount)
}
if dataPoints, ok := result["data_points"].(int); ok {
fmt.Printf(" Data points: %d\n", dataPoints)
}
if summary, ok := result["summary"].(string); ok {
fmt.Printf(" Summary: %s\n", summary)
}
// Show events if available
if events, ok := result["events"].([]TraceEvent); ok && len(events) > 0 {
fmt.Printf(" Sample events:\n")
for j, event := range events {
if j >= 3 { // Show first 3
break
}
fmt.Printf(" [%d] PID:%d Process:%s Message:%s\n",
j+1, event.PID, event.ProcessName, event.Message)
}
if len(events) > 3 {
fmt.Printf(" ... and %d more events\n", len(events)-3)
}
}
// Show statistics if available
if stats, ok := result["statistics"].(TraceStats); ok {
fmt.Printf(" Statistics:\n")
fmt.Printf(" - Events/sec: %.2f\n", stats.EventsPerSecond)
fmt.Printf(" - Total processes: %d\n", len(stats.EventsByProcess))
if len(stats.TopProcesses) > 0 {
fmt.Printf(" - Top process: %s (%d events)\n",
stats.TopProcesses[0].ProcessName, stats.TopProcesses[0].EventCount)
}
}
} else {
if errMsg, ok := result["error"].(string); ok {
fmt.Printf(" Error: %s\n", errMsg)
}
}
fmt.Println()
}
// Validate expected agent response format
t.Run("ValidateAgentResponseFormat", func(t *testing.T) {
for i, result := range results {
// Check required fields
requiredFields := []string{"name", "type", "target", "duration", "description", "status", "success"}
for _, field := range requiredFields {
if _, exists := result[field]; !exists {
t.Errorf("Result %d missing required field: %s", i, field)
}
}
// If successful, check for data fields
if success, ok := result["success"].(bool); ok && success {
// Should have either event_count or data_points
hasEventCount := false
hasDataPoints := false
if _, ok := result["event_count"]; ok {
hasEventCount = true
}
if _, ok := result["data_points"]; ok {
hasDataPoints = true
}
if !hasEventCount && !hasDataPoints {
t.Errorf("Successful result %d should have event_count or data_points", i)
}
}
}
})
fmt.Println("✅ Agent eBPF Integration Test Complete!")
fmt.Println("📈 The agent correctly processes eBPF requests and returns detailed syscall data!")
}