cgo: GDB can't debug the program within cgo code.

[gopherbot]

by huangmipi:

If the program include any cgo code, then it cant debug by GDB, every variable's value
print is wrong, look like memory address is be offset.

[gopherbot]

Comment 1 by huangmipi:

It's a very very big problem, i cant position where is my bug.

[robpike]

Comment 2:

Please provide more information, preferably a small reproducible example. Read the
template for submitting a bug that comes up when you click on New Issue.

Status changed to WaitingForReply.

[gopherbot]

Comment 3 by huangmipi:

GDB can't debug the program within cgo code.
What is the expected output?
Right variable's value in GDB breakpoint.
What do you see instead?
Wrong variable's value in GDB breakpoint.
Which compiler are you using (5g, 6g, 8g, gccgo)?
go build test.go
Which operating system are you using?
ubuntu 11.04 i386
gdb 7.6
Which version are you using?  (run 'go version')
go 1.1
example files:
================================
src/test.go
------------------------
package main
import (
  . "clib"
)
func main() {
  a := "123";
  b := "456";
  c := "789";
  println(a,b,c);
  Output("ABC");
}
------------------------
src/clib/clib.h
------------------------
#ifndef CLIB
void output(char* str);
#endif
------------------------
src/clib/clib.c
------------------------
#include "clib.h"
#include <stdio.h>
void output(char* str)
{
    printf("%s\n", str);
}
------------------------
src/clib/clib.go
------------------------
package clib
/*
#cgo CFLAGS:-g
#include "clib.h"
*/
import "C"
func Output(s string) {
  p := C.CString(s);
  C.output(p);
}
================================
go build -gcflags "-N -l" test.go
gdb ./test
b 10
r
info locals  // <- every variable's value is wrong!

[gopherbot]

Comment 4 by huangmipi:

Waiting for solve~~,i cant continue my work now!~~~~

[davecheney]

Comment 5:

Status changed to Duplicate.

Merged into issue #5719.