proto_darwin.go

Documentation: runtime/pprof

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package pprof
     6  
     7  import (
     8  	"errors"
     9  )
    10  
    11  // readMapping adds a mapping entry for the text region of the running process.
    12  // It uses the mach_vm_region region system call to add mapping entries for the
    13  // text region of the running process. Note that currently no attempt is
    14  // made to obtain the buildID information.
    15  func (b *profileBuilder) readMapping() {
    16  	if !machVMInfo(b.addMapping) {
    17  		b.addMappingEntry(0, 0, 0, "", "", true)
    18  	}
    19  }
    20  
    21  func readMainModuleMapping() (start, end uint64, exe, buildID string, err error) {
    22  	first := true
    23  	ok := machVMInfo(func(lo, hi, off uint64, file, build string) {
    24  		if first {
    25  			start, end = lo, hi
    26  			exe, buildID = file, build
    27  		}
    28  		// May see multiple text segments if rosetta is used for running
    29  		// the go toolchain itself.
    30  		first = false
    31  	})
    32  	if !ok {
    33  		return 0, 0, "", "", errors.New("machVMInfo failed")
    34  	}
    35  	return start, end, exe, buildID, nil
    36  }
    37
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