Add gopreload as a dependency

2 files changed, 33 insertions, 0 deletions

diff --git a/vendor/github.com/Xe/gopreload/doc.go b/vendor/github.com/Xe/gopreload/doc.go
new file mode 100644
index 0000000..720c5c1
--- /dev/null
+++ b/vendor/github.com/Xe/gopreload/doc.go
@@ -0,0 +1,7 @@
+/*
+Package gopreload is a bit of a hack to emulate the behavior of LD_PRELOAD [ld-preload].
+This allows you to have automatically starting instrumentation, etc.
+
+[ld-preload]: http://man7.org/linux/man-pages/man8/ld.so.8.html (see LD_PRELOAD section)
+*/
+package gopreload
diff --git a/vendor/github.com/Xe/gopreload/preload.go b/vendor/github.com/Xe/gopreload/preload.go
new file mode 100644
index 0000000..1b5a0c9
--- /dev/null
+++ b/vendor/github.com/Xe/gopreload/preload.go
@@ -0,0 +1,26 @@
+//+build linux,go1.8
+
+package gopreload
+
+import (
+	"log"
+	"os"
+	"plugin"
+	"strings"
+)
+
+func init() {
+	gpv := os.Getenv("GO_PRELOAD")
+	if gpv == "" {
+		return
+	}
+
+	for _, elem := range strings.Split(gpv, ",") {
+		log.Printf("gopreload: trying to open: %s", elem)
+		_, err := plugin.Open(elem)
+		if err != nil {
+			log.Printf("%v from GO_PRELOAD cannot be loaded: %v", elem, err)
+			continue
+		}
+	}
+}