profiler: add process tags to profiling payloads (#3583)

Author: rarguelloF

profiler/upload.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/DataDog/dd-trace-go/v2/internal/log"
 	"github.com/DataDog/dd-trace-go/v2/internal/orchestrion"
+	"github.com/DataDog/dd-trace-go/v2/internal/processtags"
 )
 
 // maxRetries specifies the maximum number of retries to have when an error occurs.
@@ -140,6 +141,7 @@ type uploadEvent struct {
 	Info             struct {
 		Profiler profilerInfo `json:"profiler"`
 	} `json:"info"`
+	ProcessTags string `json:"process_tags,omitempty"`
 }
 
 // profilerInfo holds profiler-specific information which should be attached to
@@ -187,6 +189,7 @@ func encode(bat batch, cfg *config) (contentType string, body io.Reader, err err
 		Tags:             strings.Join(tags, ","),
 		EndpointCounts:   bat.endpointCounts,
 		CustomAttributes: bat.customAttributes,
+		ProcessTags:      processtags.GlobalTags().String(),
 	}
 
 	// DD_PROFILING_ENABLED is only used to enable profiling when added with

profiler/upload_test.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	maininternal "github.com/DataDog/dd-trace-go/v2/internal"
+	"github.com/DataDog/dd-trace-go/v2/internal/processtags"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -182,3 +183,20 @@ func TestGitMetadata(t *testing.T) {
 		assert.NotContains(profile.tags, "git.repository_url:github.com/user/repo")
 	})
 }
+
+func TestProcessTags(t *testing.T) {
+	t.Run("enabled", func(t *testing.T) {
+		t.Setenv("DD_EXPERIMENTAL_PROPAGATE_PROCESS_TAGS_ENABLED", "true")
+		processtags.Reload()
+
+		profile := doOneShortProfileUpload(t)
+		assert.NotEmpty(t, profile.event.ProcessTags)
+	})
+	t.Run("disabled", func(t *testing.T) {
+		t.Setenv("DD_EXPERIMENTAL_PROPAGATE_PROCESS_TAGS_ENABLED", "false")
+		processtags.Reload()
+
+		profile := doOneShortProfileUpload(t)
+		assert.Empty(t, profile.event.ProcessTags)
+	})
+}