dr2chase

package main

// A delve stepping test.
//   dlv debug
//   b main.foo
//   c
//   s
//   s
// Expect to be stopped in fmt.Printf or runtime.duffzero
import "fmt"

dr2chase

dlv debug
Type 'help' for list of commands.
(dlv) b main.foo
Breakpoint 1 set at 0x2058 for main.foo() ./code.go:14
(dlv) c
> main.foo() ./code.go:14 (hits goroutine(1):1 total:1) (PC: 0x2058)
     9:	// Expect to be stopped in fmt.Printf or runtime.duffzero
    10:	import "fmt"
    11:	
    12:	var v int = 99

dr2chase

dlv debug
Type 'help' for list of commands.
(dlv) b main.foo
Breakpoint 1 set at 0x2058 for main.foo() ./code.go:14
(dlv) c
> main.foo() ./code.go:14 (hits goroutine(1):1 total:1) (PC: 0x2058)
     9:	// Expect to be stopped in fmt.Printf or runtime.duffzero
    10:	import "fmt"
    11:	
    12:	var v int = 99

dr2chase

package main

import (
	"fmt"
	"time"
)

var v int = 99

var s string

dr2chase

dlv debug
Type 'help' for list of commands.
(dlv) b step_hide.go:35
Breakpoint 1 set at 0x237c for main.main() ./step_hide.go:35
(dlv) c
> main.main() ./step_hide.go:35 (hits goroutine(1):1 total:1) (PC: 0x237c)
    30:		x := v
    31:		y := x * x
    32:		var z int
    33:		threads()

dr2chase

~/GoogleDrive/work/tmp/ttmp$ dlv debug
Type 'help' for list of commands.
(dlv) b main.foo
Breakpoint 1 set at 0x2058 for main.foo() ./step_hide.go:12
(dlv) c
> main.foo() ./step_hide.go:12 (hits goroutine(11):1 total:3) (PC: 0x2058)
> main.foo() ./step_hide.go:12 (hits goroutine(7):1 total:3) (PC: 0x2058)
> main.foo() ./step_hide.go:12 (hits goroutine(5):1 total:3) (PC: 0x2058)
     7:     
     8:     var v int = 99

dr2chase

Proposal: Passing Go arguments and results in registers.

Author(s): David Chase

Last updated: 2017-01-10

Discussion at https://golang.org/issue/18597.

Abstract

dr2chase

echo "interface I1 { }" > I1.java
echo "interface I2 { }" > I2.java
echo "interface I3 { }" > I3.java
echo "class I1I2 implements I1, I2 { }" > I1I2.java_good
echo "class I1I2 implements I1     { }" > I1I2.java_bad
echo "class I1I3I2 implements I1, I3, I2 { }" > I1I3I2.java

cat > tricky.java <<'//EOF'
class tricky {
 I2 i2;

dr2chase

#!/bin/bash

# filter output of multiple benchmarking experiments into a spreadsheet-friendly form

egrep '^[[a-zA-Z/]' "$1" | egrep -v "B/s|old speed" | \
sed -e '1,$s/[^0-9]*s ±[ 0-9]*%//g' | sed -e '1,$s/(p.*)//g' | \
sed -e '1,$s?[-_.a-z/]*git-codereview: changed to branch ?,?g' | \
sed -e '1,$s/ *  /,/g' | \
sed -e '1,$s/,~//g' | \
sed -e '1,$s/,[-+][0-9.]*%//g' | \

dr2chase

#!/bin/bash
# Run with environment variable "variant" set to some useful string legal in a file name.

N=25

if [[ `arch` == "ppc64le" ]] ; then
	dohttp=
else
	dohttp=1
done