package cfile

Import Path
	internal/coverage/cfile (on go.dev)

Dependency Relation
	imports 24 packages, and imported by one package

Involved Source Files

	    apis.go
	  d emit.go
		Package cfile implements management of coverage files.
		It provides functionality exported in runtime/coverage as well as
		additional functionality used directly by package testing
		through testing/internal/testdeps.

	    hooks.go
	    testsupport.go
Package-Level Functions (total 9)

	 func ClearCounters() error
		ClearCounters implements [runtime/coverage.ClearCounters].

	 func InitHook(istest bool)
		InitHook is invoked from the main package "init" routine in
		programs built with "-cover". This function is intended to be
		called only by the compiler (via runtime/coverage.initHook).
		
		If 'istest' is false, it indicates we're building a regular program
		("go build -cover ..."), in which case we immediately try to write
		out the meta-data file, and register emitCounterData as an exit
		hook.
		
		If 'istest' is true (indicating that the program in question is a
		Go test binary), then we tentatively queue up both emitMetaData and
		emitCounterData as exit hooks. In the normal case (e.g. regular "go
		test -cover" run) the testmain.go boilerplate will run at the end
		of the test, write out the coverage percentage, and then invoke
		MarkProfileEmitted to indicate that no more work needs to be
		done. If however that call is never made, this is a sign that the
		test binary is being used as a replacement binary for the tool
		being tested, hence we do want to run exit hooks when the program
		terminates.

	 func MarkProfileEmitted(val bool)
		MarkProfileEmitted signals the coverage machinery that
		coverage data output files have already been written out, and there
		is no need to take any additional action at exit time. This
		function is called from the coverage-related boilerplate code in _testmain.go
		emitted for go unit tests.

	 func ProcessCoverTestDir(dir string, cfile string, cm string, cpkg string, w io.Writer, selpkgs []string) error
		ProcessCoverTestDir is called from
		testmain code when "go test -cover" is in effect. It is not
		intended to be used other than internally by the Go command's
		generated code.

	 func Snapshot() float64
		Snapshot returns a snapshot of coverage percentage at a moment of
		time within a running test, so as to support the testing.Coverage()
		function. This version doesn't examine coverage meta-data, so the
		result it returns will be less accurate (more "slop") due to the
		fact that we don't look at the meta data to see how many statements
		are associated with each counter.

	 func WriteCounters(w io.Writer) error
		WriteCounters implements [runtime/coverage.WriteCounters].

	 func WriteCountersDir(dir string) error
		WriteCountersDir implements [runtime/coverage.WriteCountersDir].

	 func WriteMeta(w io.Writer) error
		WriteMeta implements [runtime/coverage.WriteMeta].

	 func WriteMetaDir(dir string) error
		WriteMetaDir implements [runtime/coverage.WriteMetaDir].

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