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fix: return error if target binary is not set #339

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merged 2 commits into from
Sep 21, 2023
Merged

fix: return error if target binary is not set #339

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5a74349
fix: return error if target binary is not set
rogercoll Sep 21, 2023
9bdac03
fix error commen typo
rogercoll Sep 21, 2023
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -8,6 +8,10 @@ OpenTelemetry Go Automatic Instrumentation adheres to [Semantic Versioning](http

## [Unreleased]

### Changed

- Fix runtime panic if OTEL_GO_AUTO_TARGET_EXE is not set. ([#339](https://github.com/open-telemetry/opentelemetry-go-instrumentation/pull/339))

### Deprecated

- The `go.opentelemetry.io/auto/examples/rolldice` module is deprecated.
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10 changes: 10 additions & 0 deletions instrumentation.go
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Expand Up @@ -16,6 +16,7 @@ package auto

import (
"context"
"fmt"
"os"

"go.opentelemetry.io/auto/internal/pkg/instrumentors"
Expand All @@ -36,6 +37,12 @@ type Instrumentation struct {
manager *instrumentors.Manager
}

var (
// Error message returned when instrumentation is launched without a target
// binary.
errUndefinedTarget = fmt.Errorf("undefined target Go binary, consider setting the %s environment variable pointing to the target binary to instrument", envTargetExeKey)
)

// NewInstrumentation returns a new [Instrumentation] configured with the
// provided opts.
func NewInstrumentation(opts ...InstrumentationOption) (*Instrumentation, error) {
Expand Down Expand Up @@ -119,6 +126,9 @@ func (c instConfig) applyEnv() instConfig {
}

func (c instConfig) validate() error {
if c.target == nil {
return errUndefinedTarget
}
return c.target.Validate()
}

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