123 lines
4.2 KiB
Go
123 lines
4.2 KiB
Go
// Copyright 2025 PingCAP, Inc.
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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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package traceevent_test
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import (
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"context"
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"encoding/hex"
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"strings"
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"testing"
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"github.com/pingcap/tidb/pkg/config/kerneltype"
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"github.com/pingcap/tidb/pkg/kv"
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"github.com/pingcap/tidb/pkg/session"
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"github.com/pingcap/tidb/pkg/util/traceevent"
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"github.com/stretchr/testify/require"
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)
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func TestPrevTraceIDPersistence(t *testing.T) {
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if kerneltype.IsClassic() {
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t.Skip("trace events only work for next-gen kernel")
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}
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store, dom := session.CreateStoreAndBootstrap(t)
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defer func() { require.NoError(t, store.Close()) }()
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defer dom.Close()
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se, err := session.CreateSession(store)
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require.NoError(t, err)
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// Enable trace events and install a recorder to capture events
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prevMode := traceevent.CurrentMode()
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_, err = traceevent.SetMode("full")
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require.NoError(t, err)
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defer func() {
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_, _ = traceevent.SetMode(prevMode)
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}()
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recorder := traceevent.NewRingBufferSink(100)
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prevSink := traceevent.CurrentSink()
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traceevent.SetSink(recorder)
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defer traceevent.SetSink(prevSink)
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// Create a test table
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ctx := kv.WithInternalSourceType(context.Background(), kv.InternalTxnOthers)
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_, err = se.ExecuteInternal(ctx, "create table test.t2 (id int primary key, value varchar(100))")
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require.NoError(t, err)
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// Clear the recorder and reset prev trace ID
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recorder.Reset()
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se.GetSessionVars().PrevTraceID = nil
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// Execute first statement
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stmt1, err := session.ParseWithParams4Test(ctx, se, "insert into test.t2 values (1, 'first')")
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require.NoError(t, err)
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rs1, err := se.ExecuteStmt(ctx, stmt1)
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require.NoError(t, err)
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if rs1 != nil {
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require.NoError(t, rs1.Close())
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}
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// Get the trace ID from the first statement
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firstTraceID := se.GetSessionVars().PrevTraceID
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require.NotEmpty(t, firstTraceID, "First statement should generate a trace ID")
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t.Logf("First statement trace ID: %s", hex.EncodeToString(firstTraceID))
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// Clear the recorder to capture only the second statement's events
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recorder.Reset()
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// Execute second statement in the same session
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stmt2, err := session.ParseWithParams4Test(ctx, se, "insert into test.t2 values (2, 'second')")
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require.NoError(t, err)
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rs2, err := se.ExecuteStmt(ctx, stmt2)
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require.NoError(t, err)
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if rs2 != nil {
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require.NoError(t, rs2.Close())
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}
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// Get the trace ID from the second statement
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secondTraceID := se.GetSessionVars().PrevTraceID
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require.NotEmpty(t, secondTraceID, "Second statement should generate a trace ID")
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t.Logf("Second statement trace ID: %s", hex.EncodeToString(secondTraceID))
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// Verify that the trace IDs are different
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require.NotEqual(t, firstTraceID, secondTraceID, "Each statement should have a unique trace ID")
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// Check recorded events for prev_trace_id field
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events := recorder.Snapshot()
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require.NotEmpty(t, events, "Should have recorded trace events")
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// Look for stmt.start events and verify prev_trace_id matches first statement
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foundPrevTraceID := false
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for _, event := range events {
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if event.Name == "stmt.start" {
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for _, field := range event.Fields {
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if field.Key == "prev_trace_id" {
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foundPrevTraceID = true
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// The prev_trace_id should match the first statement's trace ID
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// Note: redact.Key() may uppercase the hex string, so we do case-insensitive comparison
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prevTraceIDHex := field.String
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expectedPrevTraceIDHex := hex.EncodeToString(firstTraceID)
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t.Logf("Found prev_trace_id in stmt.start event: %s (expected: %s)", prevTraceIDHex, expectedPrevTraceIDHex)
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require.Equal(t, strings.ToUpper(expectedPrevTraceIDHex), strings.ToUpper(prevTraceIDHex), "prev_trace_id should match the previous statement's trace ID")
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break
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}
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}
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}
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}
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require.True(t, foundPrevTraceID, "Should find prev_trace_id field in stmt.start events")
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}
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