// license that can be found in the LICENSE file.

package cfile

import "internal/runtime/exithook"

// 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

// license that can be found in the LICENSE file.

package coverage

import (
	"internal/coverage/cfile"
	"io"
)

// initHook is invoked from main.init in programs built with -cover.
// The call is emitted by the compiler.
func initHook(istest bool) {
	cfile.InitHook(istest)
}

// WriteMetaDir writes a coverage meta-data file for the currently
// running program to the directory specified in 'dir'. An error will

// in cmd/compile/internal/typecheck
// to update builtin.go. This is not done automatically
// to avoid depending on having a working compiler binary.

//go:build ignore

package coverage

	// bodies (with counter updates) might be inlined into init.
	cnames.InitFn.Body.Prepend(assign)
}

// addInitHookCall generates a call to runtime/coverage.initHook() and
// inserts it into the package main init function, which will kick off
// the process for coverage data writing (emit meta data, and register
// an exit hook to emit counter data).

	return typs[:]
}

var coverageDecls = [...]struct {
	name string
	tag  int
	typ  int
}{
	{"initHook", funcTag, 1},
}

func coverageTypes() []*types.Type {
	var typs [2]*types.Type
	typs[0] = types.Types[types.TBOOL]
	typs[1] = newSig(params(typs[0]), nil)
	return typs[:]