diff --git a/pkg/instrumentation/gin/server/context_hook.go b/pkg/instrumentation/gin/server/context_hook.go new file mode 100644 index 000000000..8067ac3aa --- /dev/null +++ b/pkg/instrumentation/gin/server/context_hook.go @@ -0,0 +1,107 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package server + +import ( + "github.com/gin-gonic/gin" + "go.opentelemetry.io/otel/codes" + semconv "go.opentelemetry.io/otel/semconv/v1.37.0" + "go.opentelemetry.io/otel/trace" + + "github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg/inst" +) + +// routeSetKey is stored on the gin.Context to prevent repeated span updates +// when multiple middleware layers call c.Next(). The key is reserved by this +// package; user middleware must not set or read it. +const ( + routeSetKey = "otel.gin.route.set" + nextDepthKey = "otel.gin.next.depth" +) + +// BeforeNext runs before (*gin.Context).Next. By the time Next is called, +// gin's router has already matched the request to a route and populated +// c.FullPath(). We use this to update the span name from the initial +// "METHOD" to "METHOD /route/pattern" and record the http.route attribute. +func BeforeNext(ictx inst.HookContext, c *gin.Context) { + if !serverEnabler.Enable() { + return + } + if c == nil || c.Request == nil { + return + } + + if d, exists := c.Get(nextDepthKey); exists { + if depth, ok := d.(int); ok { + c.Set(nextDepthKey, depth+1) + } else { + c.Set(nextDepthKey, 1) + } + } else { + c.Set(nextDepthKey, 1) + } + + route := c.FullPath() + if route == "" { + // No route matched (e.g. 404). Leave the span name as the method only. + return + } + + // c.Next() is called by each middleware in the chain, so this hook fires + // multiple times per request. Only the first call needs to update the span. + if _, already := c.Get(routeSetKey); already { + return + } + + span := trace.SpanFromContext(c.Request.Context()) + if !span.IsRecording() { + return + } + + // Set the gate only after confirming we have a recording span to update. + // Otherwise a non-recording first call would burn the gate and block a + // later recording span on the same request from being enriched. + c.Set(routeSetKey, struct{}{}) + + span.SetName(c.Request.Method + " " + route) + span.SetAttributes(semconv.HTTPRouteKey.String(route)) + + logger.Debug("gin route resolved", "route", route) +} + +// AfterNext runs after (*gin.Context).Next returns. It records any errors +// accumulated via c.Error() during request handling. +func AfterNext(ictx inst.HookContext) { + if !serverEnabler.Enable() { + return + } + + c, ok := ictx.GetParam(0).(*gin.Context) + if !ok || c == nil || c.Request == nil { + return + } + + d, _ := c.Get(nextDepthKey) + depth, _ := d.(int) + depth-- + c.Set(nextDepthKey, depth) + + if depth > 0 { + return + } + + if len(c.Errors) == 0 { + return + } + + span := trace.SpanFromContext(c.Request.Context()) + if !span.IsRecording() { + return + } + + span.SetStatus(codes.Error, c.Errors.String()) + for _, e := range c.Errors { + span.RecordError(e.Err) + } +} diff --git a/pkg/instrumentation/gin/server/context_hook_test.go b/pkg/instrumentation/gin/server/context_hook_test.go new file mode 100644 index 000000000..42fb1f06b --- /dev/null +++ b/pkg/instrumentation/gin/server/context_hook_test.go @@ -0,0 +1,303 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package server + +import ( + "context" + "errors" + "net/http/httptest" + "testing" + + "github.com/gin-gonic/gin" + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + "go.opentelemetry.io/otel" + "go.opentelemetry.io/otel/codes" + "go.opentelemetry.io/otel/propagation" + sdktrace "go.opentelemetry.io/otel/sdk/trace" + "go.opentelemetry.io/otel/sdk/trace/tracetest" + "go.opentelemetry.io/otel/trace" + + "github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg/inst/insttest" +) + +func init() { + gin.SetMode(gin.TestMode) +} + +// newGinContextWithRoute creates a *gin.Context that has FullPath() populated +// by routing a real request through a minimal gin engine. The returned context +// has the given span embedded in c.Request.Context(). +func newGinContextWithRoute(t *testing.T, method, routePattern, url string, span trace.Span) *gin.Context { + t.Helper() + + var captured *gin.Context + r := gin.New() + r.Handle(method, routePattern, func(c *gin.Context) { + captured = c + }) + + req := httptest.NewRequest(method, url, nil) + if span != nil { + ctx := trace.ContextWithSpan(context.Background(), span) + req = req.WithContext(ctx) + } + + w := httptest.NewRecorder() + r.ServeHTTP(w, req) + + require.NotNil(t, captured, "no handler was invoked; check route pattern and URL") + return captured +} + +func setupContextTracer(t *testing.T) (*tracetest.SpanRecorder, trace.Tracer) { + t.Helper() + sr := tracetest.NewSpanRecorder() + tp := sdktrace.NewTracerProvider(sdktrace.WithSpanProcessor(sr)) + otel.SetTracerProvider(tp) + otel.SetTextMapPropagator(propagation.TraceContext{}) + t.Cleanup(func() { + _ = tp.Shutdown(context.Background()) + }) + return sr, tp.Tracer("test") +} + +func TestBeforeNext_UpdatesSpanNameAndRoute(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + c := newGinContextWithRoute(t, "GET", "/users/:id", "/users/42", span) + + ictx := insttest.NewMockHookContext(c) + BeforeNext(ictx, c) + + span.End() + require.Len(t, sr.Ended(), 1) + ended := sr.Ended()[0] + + assert.Equal(t, "GET /users/:id", ended.Name(), "span name should include route pattern") + + attrs := make(map[string]interface{}) + for _, a := range ended.Attributes() { + attrs[string(a.Key)] = a.Value.AsInterface() + } + assert.Equal(t, "/users/:id", attrs["http.route"], "http.route attribute should be the pattern, not the URL") +} + +func TestBeforeNext_EmptyRouteIsNoop(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + + // gin.CreateTestContext produces a context with no router match, + // so FullPath() returns "". BeforeNext should be a no-op. + w := httptest.NewRecorder() + c, _ := gin.CreateTestContext(w) + c.Request = httptest.NewRequest("GET", "/does-not-exist", nil). + WithContext(trace.ContextWithSpan(context.Background(), span)) + + ictx := insttest.NewMockHookContext(c) + BeforeNext(ictx, c) + span.End() + + require.Len(t, sr.Ended(), 1) + assert.Equal(t, "GET", sr.Ended()[0].Name(), "span name must not be modified when route is empty") +} + +func TestBeforeNext_IdempotentOnMultipleNextCalls(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + c := newGinContextWithRoute(t, "GET", "/items/:id", "/items/7", span) + ictx := insttest.NewMockHookContext(c) + + // Simulate multiple middleware calling c.Next(). + BeforeNext(ictx, c) + BeforeNext(ictx, c) + BeforeNext(ictx, c) + + span.End() + require.Len(t, sr.Ended(), 1) + + // http.route should appear exactly once (not duplicated by repeated calls). + var routeAttrCount int + for _, a := range sr.Ended()[0].Attributes() { + if string(a.Key) == "http.route" { + routeAttrCount++ + } + } + assert.Equal( + t, + 1, + routeAttrCount, + "http.route should be set exactly once regardless of how many times Next is called", + ) +} + +func TestBeforeNext_DisabledIsNoop(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_DISABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + c := newGinContextWithRoute(t, "GET", "/ping", "/ping", span) + + ictx := insttest.NewMockHookContext(c) + BeforeNext(ictx, c) + + span.End() + require.Len(t, sr.Ended(), 1) + + // Name should still be the initial "GET" since the hook is disabled. + assert.Equal(t, "GET", sr.Ended()[0].Name()) +} + +func TestBeforeNext_NonRecordingSpanDoesNotBurnGate(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + // First call: request context has no span attached, so trace.SpanFromContext + // returns a non-recording no-op span. The gate must NOT be set, because no + // span update happened. + c := newGinContextWithRoute(t, "GET", "/users/:id", "/users/42", nil) + ictx := insttest.NewMockHookContext(c) + BeforeNext(ictx, c) + + // Second call: attach a recording span. Because the previous call did not + // burn the gate, this call must still enrich the span. + _, recording := tr.Start(context.Background(), "GET") + c.Request = c.Request.WithContext( + trace.ContextWithSpan(c.Request.Context(), recording), + ) + BeforeNext(ictx, c) + recording.End() + + require.Len(t, sr.Ended(), 1) + assert.Equal(t, "GET /users/:id", sr.Ended()[0].Name(), + "recording span must be enriched even after a non-recording call ran first") + + attrs := make(map[string]interface{}) + for _, a := range sr.Ended()[0].Attributes() { + attrs[string(a.Key)] = a.Value.AsInterface() + } + assert.Equal(t, "/users/:id", attrs["http.route"]) +} + +func TestAfterNext_RecordsGinErrors(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + c := newGinContextWithRoute(t, "GET", "/users/:id", "/users/42", span) + + ictx := insttest.NewMockHookContext(c) + BeforeNext(ictx, c) + + _ = c.Error(errors.New("db connection lost")) + _ = c.Error(errors.New("fallback failed")) + + AfterNext(ictx) + + span.End() + require.Len(t, sr.Ended(), 1) + ended := sr.Ended()[0] + + assert.Equal(t, codes.Error, ended.Status().Code) + assert.Contains(t, ended.Status().Description, "db connection lost") + assert.Contains(t, ended.Status().Description, "fallback failed") + + events := ended.Events() + require.Len(t, events, 2) + assert.Equal(t, "exception", events[0].Name) + assert.Equal(t, "exception", events[1].Name) +} + +func TestAfterNext_NoErrorsIsNoop(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + c := newGinContextWithRoute(t, "GET", "/ping", "/ping", span) + + ictx := insttest.NewMockHookContext(c) + BeforeNext(ictx, c) + AfterNext(ictx) + + span.End() + require.Len(t, sr.Ended(), 1) + assert.Equal(t, codes.Unset, sr.Ended()[0].Status().Code) + assert.Empty(t, sr.Ended()[0].Events()) +} + +func TestAfterNext_RecordsOnlyAtOutermostReturn(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + c := newGinContextWithRoute(t, "GET", "/items/:id", "/items/7", span) + ictx := insttest.NewMockHookContext(c) + + // Simulate three nested middleware calling c.Next(). + BeforeNext(ictx, c) + BeforeNext(ictx, c) + BeforeNext(ictx, c) + + // Handler adds an error. + _ = c.Error(errors.New("handler error")) + + // Inner two AfterNext calls — depth > 0, should not record. + AfterNext(ictx) + AfterNext(ictx) + + // Middleware adds an error after its c.Next() returned. + _ = c.Error(errors.New("middleware cleanup error")) + + // Outermost AfterNext — depth == 0, should record both errors. + AfterNext(ictx) + + span.End() + require.Len(t, sr.Ended(), 1) + ended := sr.Ended()[0] + + assert.Equal(t, codes.Error, ended.Status().Code) + assert.Contains(t, ended.Status().Description, "handler error") + assert.Contains(t, ended.Status().Description, "middleware cleanup error") + require.Len(t, ended.Events(), 2, + "both errors must be recorded at the outermost return") +} + +func TestAfterNext_NonRecordingSpanSkipsRecording(t *testing.T) { + sr, _ := setupContextTracer(t) + t.Setenv("OTEL_GO_ENABLED_INSTRUMENTATIONS", "gin") + + // No span attached — trace.SpanFromContext returns a non-recording no-op. + c := newGinContextWithRoute(t, "GET", "/users/:id", "/users/42", nil) + _ = c.Error(errors.New("should not be recorded")) + + ictx := insttest.NewMockHookContext(c) + BeforeNext(ictx, c) + AfterNext(ictx) + + assert.Empty(t, sr.Ended(), "non-recording span must not produce any recorded spans") +} + +func TestAfterNext_DisabledIsNoop(t *testing.T) { + sr, tr := setupContextTracer(t) + t.Setenv("OTEL_GO_DISABLED_INSTRUMENTATIONS", "gin") + + _, span := tr.Start(context.Background(), "GET") + c := newGinContextWithRoute(t, "GET", "/ping", "/ping", span) + + _ = c.Error(errors.New("should be ignored")) + + ictx := insttest.NewMockHookContext(c) + AfterNext(ictx) + + span.End() + require.Len(t, sr.Ended(), 1) + assert.Equal(t, codes.Unset, sr.Ended()[0].Status().Code) + assert.Empty(t, sr.Ended()[0].Events()) +} diff --git a/pkg/instrumentation/gin/server/gin.go b/pkg/instrumentation/gin/server/gin.go new file mode 100644 index 000000000..5a27a3fe9 --- /dev/null +++ b/pkg/instrumentation/gin/server/gin.go @@ -0,0 +1,21 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package server + +import ( + "github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg/instrumentation/shared" +) + +const instrumentationKey = "GIN" + +var logger = shared.Logger() + +// ginEnabler controls whether gin instrumentation is enabled. +type ginEnabler struct{} + +func (g ginEnabler) Enable() bool { + return shared.Instrumented(instrumentationKey) +} + +var serverEnabler = ginEnabler{} diff --git a/pkg/instrumentation/gin/server/go.mod b/pkg/instrumentation/gin/server/go.mod new file mode 100644 index 000000000..da1157889 --- /dev/null +++ b/pkg/instrumentation/gin/server/go.mod @@ -0,0 +1,86 @@ +module github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg/instrumentation/gin/server + +go 1.25.0 + +require ( + github.com/gin-gonic/gin v1.10.0 + github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg v0.0.0-00010101000000-000000000000 + github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg/instrumentation/shared v0.0.0-00010101000000-000000000000 + github.com/stretchr/testify v1.11.1 + go.opentelemetry.io/otel v1.43.0 + go.opentelemetry.io/otel/sdk v1.43.0 + go.opentelemetry.io/otel/trace v1.43.0 +) + +require ( + github.com/beorn7/perks v1.0.1 // indirect + github.com/bytedance/sonic v1.11.6 // indirect + github.com/bytedance/sonic/loader v0.1.1 // indirect + github.com/cenkalti/backoff/v5 v5.0.3 // indirect + github.com/cespare/xxhash/v2 v2.3.0 // indirect + github.com/cloudwego/base64x v0.1.4 // indirect + github.com/cloudwego/iasm v0.2.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/gabriel-vasile/mimetype v1.4.3 // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/go-logr/logr v1.4.3 // indirect + github.com/go-logr/stdr v1.2.2 // indirect + github.com/go-playground/locales v0.14.1 // indirect + github.com/go-playground/universal-translator v0.18.1 // indirect + github.com/go-playground/validator/v10 v10.20.0 // indirect + github.com/goccy/go-json v0.10.2 // indirect + github.com/google/uuid v1.6.0 // indirect + github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect + github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/cpuid/v2 v2.2.7 // indirect + github.com/leodido/go-urn v1.4.0 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/pelletier/go-toml/v2 v2.2.2 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/prometheus/client_golang v1.23.0 // indirect + github.com/prometheus/client_model v0.6.2 // indirect + github.com/prometheus/common v0.65.0 // indirect + github.com/prometheus/otlptranslator v0.0.2 // indirect + github.com/prometheus/procfs v0.17.0 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.2.12 // indirect + go.opentelemetry.io/auto/sdk v1.2.1 // indirect + go.opentelemetry.io/contrib/bridges/prometheus v0.63.0 // indirect + go.opentelemetry.io/contrib/exporters/autoexport v0.63.0 // indirect + go.opentelemetry.io/contrib/instrumentation/runtime v0.64.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.14.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.19.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.43.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.43.0 // indirect + go.opentelemetry.io/otel/exporters/prometheus v0.60.0 // indirect + go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.14.0 // indirect + go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.38.0 // indirect + go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.38.0 // indirect + go.opentelemetry.io/otel/log v0.19.0 // indirect + go.opentelemetry.io/otel/metric v1.43.0 // indirect + go.opentelemetry.io/otel/sdk/log v0.19.0 // indirect + go.opentelemetry.io/otel/sdk/metric v1.43.0 // indirect + go.opentelemetry.io/proto/otlp v1.10.0 // indirect + golang.org/x/arch v0.8.0 // indirect + golang.org/x/crypto v0.49.0 // indirect + golang.org/x/net v0.52.0 // indirect + golang.org/x/sys v0.42.0 // indirect + golang.org/x/text v0.35.0 // indirect + google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 // indirect + google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 // indirect + google.golang.org/grpc v1.80.0 // indirect + google.golang.org/protobuf v1.36.11 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) + +replace ( + github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg => ../../.. + github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg/instrumentation/shared => ../../shared +) diff --git a/pkg/instrumentation/gin/server/go.sum b/pkg/instrumentation/gin/server/go.sum new file mode 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h1:RDnPtIxvqlgO8GRW18W6Z/4P462ldprJtfxHxyKd2PY= +go.opentelemetry.io/otel/sdk v1.43.0 h1:pi5mE86i5rTeLXqoF/hhiBtUNcrAGHLKQdhg4h4V9Dg= +go.opentelemetry.io/otel/sdk v1.43.0/go.mod h1:P+IkVU3iWukmiit/Yf9AWvpyRDlUeBaRg6Y+C58QHzg= +go.opentelemetry.io/otel/sdk/log v0.19.0 h1:scYVLqT22D2gqXItnWiocLUKGH9yvkkeql5dBDiXyko= +go.opentelemetry.io/otel/sdk/log v0.19.0/go.mod h1:vFBowwXGLlW9AvpuF7bMgnNI95LiW10szrOdvzBHlAg= +go.opentelemetry.io/otel/sdk/log/logtest v0.19.0 h1:BEbF7ZBB6qQloV/Ub1+3NQoOUnVtcGkU3XX4Ws3GQfk= +go.opentelemetry.io/otel/sdk/log/logtest v0.19.0/go.mod h1:Lua81/3yM0wOmoHTokLj9y9ADeA02v1naRrVrkAZuKk= +go.opentelemetry.io/otel/sdk/metric v1.43.0 h1:S88dyqXjJkuBNLeMcVPRFXpRw2fuwdvfCGLEo89fDkw= +go.opentelemetry.io/otel/sdk/metric v1.43.0/go.mod h1:C/RJtwSEJ5hzTiUz5pXF1kILHStzb9zFlIEe85bhj6A= +go.opentelemetry.io/otel/trace v1.43.0 h1:BkNrHpup+4k4w+ZZ86CZoHHEkohws8AY+WTX09nk+3A= +go.opentelemetry.io/otel/trace v1.43.0/go.mod h1:/QJhyVBUUswCphDVxq+8mld+AvhXZLhe+8WVFxiFff0= 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v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8= +google.golang.org/grpc v1.80.0 h1:Xr6m2WmWZLETvUNvIUmeD5OAagMw3FiKmMlTdViWsHM= +google.golang.org/grpc v1.80.0/go.mod h1:ho/dLnxwi3EDJA4Zghp7k2Ec1+c2jqup0bFkw07bwF4= +google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE= +google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50= +rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= diff --git a/pkg/instrumentation/gin/server/server.yaml b/pkg/instrumentation/gin/server/server.yaml new file mode 100644 index 000000000..1e84b6e8d --- /dev/null +++ b/pkg/instrumentation/gin/server/server.yaml @@ -0,0 +1,7 @@ +gin_context_next_hook: + target: github.com/gin-gonic/gin + func: Next + recv: "*Context" + before: BeforeNext + after: AfterNext + path: "github.com/open-telemetry/opentelemetry-go-compile-instrumentation/pkg/instrumentation/gin/server" diff --git a/test/apps/ginserver/go.mod b/test/apps/ginserver/go.mod new file mode 100644 index 000000000..87fc76167 --- /dev/null +++ b/test/apps/ginserver/go.mod @@ -0,0 +1,34 @@ +module github.com/open-telemetry/opentelemetry-go-compile-instrumentation/test/apps/ginserver + +go 1.25.0 + +require github.com/gin-gonic/gin v1.10.0 + +require ( + github.com/bytedance/sonic v1.11.6 // indirect + github.com/bytedance/sonic/loader v0.1.1 // indirect + github.com/cloudwego/base64x v0.1.4 // indirect + github.com/cloudwego/iasm v0.2.0 // indirect + github.com/gabriel-vasile/mimetype v1.4.3 // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/go-playground/locales v0.14.1 // indirect + github.com/go-playground/universal-translator v0.18.1 // indirect + github.com/go-playground/validator/v10 v10.20.0 // indirect + github.com/goccy/go-json v0.10.2 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/cpuid/v2 v2.2.7 // indirect + github.com/leodido/go-urn v1.4.0 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/pelletier/go-toml/v2 v2.2.2 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.2.12 // indirect + golang.org/x/arch v0.8.0 // indirect + golang.org/x/crypto v0.23.0 // indirect + golang.org/x/net v0.25.0 // indirect + golang.org/x/sys v0.20.0 // indirect + golang.org/x/text v0.15.0 // indirect + google.golang.org/protobuf v1.34.1 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/test/apps/ginserver/go.sum b/test/apps/ginserver/go.sum new file mode 100644 index 000000000..7f08abb20 --- /dev/null +++ b/test/apps/ginserver/go.sum @@ -0,0 +1,89 @@ +github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0= +github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4= +github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM= +github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU= +github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y= +github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w= +github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg= +github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0= +github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk= +github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE= +github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI= +github.com/gin-gonic/gin v1.10.0 h1:nTuyha1TYqgedzytsKYqna+DfLos46nTv2ygFy86HFU= +github.com/gin-gonic/gin v1.10.0/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y= +github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s= +github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4= +github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA= +github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY= +github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY= +github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY= +github.com/go-playground/validator/v10 v10.20.0 h1:K9ISHbSaI0lyB2eWMPJo+kOS/FBExVwjEviJTixqxL8= +github.com/go-playground/validator/v10 v10.20.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM= +github.com/goccy/go-json v0.10.2 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Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +// Package main is a minimal gin server used for e2e instrumentation testing. +package main + +import ( + "flag" + "fmt" + "log" + "net/http" + "strconv" + + "github.com/gin-gonic/gin" +) + +var port = flag.String("port", "8080", "port to listen on") + +func main() { + flag.Parse() + gin.SetMode(gin.ReleaseMode) + + r := gin.New() + + r.GET("/hello/:name", func(c *gin.Context) { + name := c.Param("name") + c.JSON(http.StatusOK, gin.H{"message": "Hello " + name}) + }) + + r.GET("/error", func(c *gin.Context) { + _ = c.Error(fmt.Errorf("gin context error")) + c.JSON(http.StatusOK, gin.H{"error": "recorded"}) + }) + + r.GET("/status/:code", func(c *gin.Context) { + code, err := strconv.Atoi(c.Param("code")) + if err != nil || code < 100 || code > 599 { + c.Status(http.StatusBadRequest) + return + } + c.Status(code) + }) + + addr := fmt.Sprintf(":%s", *port) + if err := r.Run(addr); err != nil { + log.Fatalf("server error: %v", err) + } +} diff --git a/test/integration/gin_server_test.go b/test/integration/gin_server_test.go new file mode 100644 index 000000000..645031afe --- /dev/null +++ b/test/integration/gin_server_test.go @@ -0,0 +1,116 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +//go:build integration + +package test + +import ( + "fmt" + "net/http" + "testing" + + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + "go.opentelemetry.io/collector/pdata/ptrace" + semconv "go.opentelemetry.io/otel/semconv/v1.37.0" + + "github.com/open-telemetry/opentelemetry-go-compile-instrumentation/test/testutil" +) + +func TestGinServer(t *testing.T) { + testCases := []struct { + name string + port int + path string + wantStatus int + assertSpan func(t *testing.T, span ptrace.Span) + }{ + { + name: "matched route is enriched with http.route", + port: 8090, + path: "/hello/OpenTelemetry", + wantStatus: http.StatusOK, + assertSpan: func(t *testing.T, span ptrace.Span) { + // The single most important assertion: the span name must + // use the route template, not the literal URL path. This is + // the entire reason this package exists on top of net/http. + assert.Equal(t, "GET /hello/:name", span.Name(), + "span name must be route pattern, not literal URL") + + testutil.RequireAttribute(t, span, string(semconv.HTTPRouteKey), "/hello/:name") + testutil.RequireAttribute(t, span, string(semconv.HTTPRequestMethodKey), "GET") + testutil.RequireAttribute(t, span, string(semconv.HTTPResponseStatusCodeKey), int64(200)) + testutil.RequireAttribute(t, span, string(semconv.URLPathKey), "/hello/OpenTelemetry") + }, + }, + { + name: "5xx response carries error.type", + port: 8091, + path: fmt.Sprintf("/status/%d", http.StatusInternalServerError), + wantStatus: http.StatusInternalServerError, + assertSpan: func(t *testing.T, span ptrace.Span) { + testutil.RequireAttribute(t, span, string(semconv.HTTPResponseStatusCodeKey), int64(500)) + testutil.RequireAttributeExists(t, span, string(semconv.ErrorTypeKey)) + }, + }, + { + name: "c.Error() surfaces as span status and exception event", + port: 8092, + path: "/error", + wantStatus: http.StatusOK, + assertSpan: func(t *testing.T, span ptrace.Span) { + assert.Equal(t, "GET /error", span.Name()) + assert.Equal(t, ptrace.StatusCodeError, span.Status().Code(), + "span status must be Error when c.Error() was called") + assert.GreaterOrEqual(t, span.Events().Len(), 1, + "span must have at least one exception event from RecordError") + }, + }, + { + name: "unmatched route keeps plain method as span name", + port: 8093, + path: "/no-such-route", + wantStatus: http.StatusNotFound, + assertSpan: func(t *testing.T, span ptrace.Span) { + // For unmatched paths gin does not populate c.FullPath() so + // the hook bails out. The span name must remain the plain + // method from the upstream net/http instrumentation and + // http.route must not be set. This guards against a + // cardinality regression where every probed URL would + // otherwise turn into a unique span name. + assert.Equal(t, "GET", span.Name(), + "span name must remain plain method when no gin route matches") + + _, hasRoute := testutil.Attrs(span)[string(semconv.HTTPRouteKey)] + assert.False(t, hasRoute, + "http.route must not be set when no gin route matches") + + testutil.RequireAttribute(t, span, string(semconv.HTTPResponseStatusCodeKey), int64(404)) + testutil.RequireAttribute(t, span, string(semconv.URLPathKey), "/no-such-route") + }, + }, + } + + for _, tc := range testCases { + t.Run(tc.name, func(t *testing.T) { + f := testutil.NewTestFixture(t) + + addr := fmt.Sprintf("127.0.0.1:%d", tc.port) + f.BuildAndStart("ginserver", fmt.Sprintf("-port=%d", tc.port)) + testutil.WaitForTCP(t, addr) + + resp, err := http.Get("http://" + addr + tc.path) //nolint:noctx + require.NoError(t, err) + require.NoError(t, resp.Body.Close()) + require.Equal(t, tc.wantStatus, resp.StatusCode) + + testutil.WaitForSpanFlush(t) + + f.RequireTraceCount(1) + f.RequireSpansPerTrace(1) + span := testutil.RequireSpan(t, f.Traces(), testutil.IsServer) + tc.assertSpan(t, span) + }) + } +} diff --git a/test/testutil/infra.go b/test/testutil/infra.go index 30398e846..96e98c407 100644 --- a/test/testutil/infra.go +++ b/test/testutil/infra.go @@ -4,6 +4,7 @@ package testutil import ( + "bytes" "context" "os" "os/exec" @@ -75,19 +76,28 @@ func Run(t *testing.T, dir string, args ...string) string { } // Start starts the application but does not wait for it to complete. -// It returns the command and the combined output pipe(stdout and stderr). +// Stdout and stderr are captured and logged when the test fails, +// so that app crashes are visible in CI output. func Start(t *testing.T, dir string, args ...string) { appName := "./" + appBinName if util.IsWindows() { appName += ".exe" } cmd := newCmd(t.Context(), dir, append([]string{appName}, args...)...) - cmd.Stderr = cmd.Stdout // redirect stderr to stdout for easier debugging + + var buf bytes.Buffer + cmd.Stdout = &buf + cmd.Stderr = &buf + err := cmd.Start() require.NoError(t, err) t.Cleanup(func() { if cmd.Process != nil { _ = cmd.Process.Kill() + _ = cmd.Wait() // ensure all output is flushed + } + if t.Failed() && buf.Len() > 0 { + t.Logf("app output:\n%s", buf.String()) } }) }