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// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package pprof
import (
"errors"
)
// readMapping adds a mapping entry for the text region of the running process.
// It uses the mach_vm_region region system call to add mapping entries for the
// text region of the running process. Note that currently no attempt is
// made to obtain the buildID information.
func (b *profileBuilder) readMapping() {
if !machVMInfo(b.addMapping) {
b.addMappingEntry(0, 0, 0, "", "", true)
}
}
func readMainModuleMapping() (start, end uint64, exe, buildID string, err error) {
first := true
ok := machVMInfo(func(lo, hi, off uint64, file, build string) {
if first {
start, end = lo, hi
exe, buildID = file, build
}
// May see multiple text segments if rosetta is used for running
// the go toolchain itself.
first = false
})
if !ok {
return 0, 0, "", "", errors.New("machVMInfo failed")
}
return start, end, exe, buildID, nil
}
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