mirror of https://github.com/golang/go.git
37 lines
1.0 KiB
Go
37 lines
1.0 KiB
Go
// 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
|
|
}
|