programmatic way to find if application go binary is built with -cover flag ?

[Akash Kumar]

Is there a way in go to find whether a go binary is built with -cover flag ?

[Zxilly Chou]

try debug.ReadBuildInfo(), then iterate the pair in the buildinfo.Settings

[Akash Kumar]

I am writing an external go program that will take the path to another go binary as argument, and checks if the binary was built with cover flag.

`debug.ReadBuildInfo()` is meant for getting build info embedded in the running binary as 

> ReadBuildInfo returns the build information embedded in the running binary 

[Tamás Gulácsi]

runtime/debug.ReadBuildInfo is a good source of truth:

$ strings bin/godeb|grep '^build\s'

build   -buildmode=exe
build   -compiler=gc
build   DefaultGODEBUG=httplaxcontentlength=1,httpmuxgo121=1,panicnil=1,tls10server=1,tlsrsakex=1,tlsunsafeekm=1
build   CGO_ENABLED=1
build   CGO_CFLAGS=
build   CGO_CPPFLAGS=
build   CGO_CXXFLAGS=
build   CGO_LDFLAGS=
build   GOARCH=amd64
build   GOOS=linux
build   GOAMD64=v1
build   -buildmode=exe
build   -compiler=gc
build   DefaultGODEBUG=httplaxcontentlength=1,httpmuxgo121=1,panicnil=1,tls10server=1,tlsrsakex=1,tlsunsafeekm=1
build   CGO_ENABLED=1
build   CGO_CFLAGS=
build   CGO_CPPFLAGS=
build   CGO_CXXFLAGS=
build   CGO_LDFLAGS=
build   GOARCH=amd64
build   GOOS=linux

build   GOAMD64=v1

[Akash Kumar]

I unable to find a flag from corresponds to -cover in the result returned from debug.buildInfo

[肖华冬]

There is possibly a way to do this by parsing strings in the binary. Because when -cover is enabled, go will insert instrumentation statements into the source code, thus the resulting binary would contain these info.

On May 14, 2024, at 17:19, Akash Kumar <meaka...@gmail.com> wrote:



--
You received this message because you are subscribed to the Google Groups "golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/9fda396a-b79e-4b9e-9bc0-13a9cef2c921n%40googlegroups.com.