How Can I Remove File Paths from Go Binary TEXT Directives?

Removing File Paths from TEXT Directives in Go Binaries

Problem:

When building Go executables, path information such as "/Users/myuser/dev/go/src/fooapi/spikes/mongoapi.go" is often included in the TEXT directives within the assembly. This path information can be undesirable in certain scenarios.

Solution:

To remove file path information, use the -trimpath flag in conjunction with -gcflags and -asmflags during the build process:

CGO_ENABLED=0 go build -v -a -ldflags="-w -s" \
    -gcflags=-trimpath=/Users/myuser/dev/go/src \
    -asmflags=-trimpath=/Users/myuser/dev/go/src \
    -o ./fooapi spikes/mongoapi.go

How it Works:

Passing -trimpath to -gcflags and -asmflags removes any path information from the elf binary. This ensures that the TEXT directives in the assembly only contain the relevant function names and offsets, without the associated file paths.

Verification:

You can verify the result using the go tool objdump command:

$ go tool objdump ./fooapi
.
.
TEXT main.init(SB) api/spikes/mongoapi.go
mongoapi.go:60  0x12768c0   65488b0c25a0080000  GS MOVQ GS:0x8a0, CX
mongoapi.go:60  0x12768c9   483b6110        CMPQ 0x10(CX), SP
mongoapi.go:60  0x12768cd   7663            JBE 0x1276932
.
.

As you can see, the file path "/Users/myuser/dev/go/src/api/spikes/mongoapi.go" has been removed from the TEXT directives.

Additional Information:

Using the strip tool to remove file path information is not recommended as it can potentially lead to broken executables. The -trimpath flag provides a more controlled and reliable way to achieve the desired result.

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