>Category: gcj
>Synopsis: GDB java problems: constructors and 'ptype'
>Confidential: no
>Severity: serious
>Priority: medium
>Class: sw-bug
>Submitter-Id: net
>Originator: Bryce McKinlay
>Release: unknown-1.0
>Environment:
gcj 20000422 and gdb 20000423
>Description:
GDB has various annoying glitches when debugging java code.
Here is a couple that I tracked down.
Given the following code:
public class TestGDB
{
String str1 = "some string";
public static void main(String args[])
{
new TestGDB();
}
public TestGDB ()
{
int a = 6;
System.out.println(a);
}
}
One can successfully run gdb and put a breakpoint on the
constructor for "TestGDB" using "b TestGDB.TestGDB". However,
ptype doesn't work:
(gdb) ptype TestGDB
type = <unknown type>
Now, comment out the field "str1" and recompile the example.
Suddenly, ptype works:
(gdb) ptype TestGDB
type = class TestGDB extends java.lang.Object {
void main(java.lang.String[]);
void <init>(void);
}
But the constructor "TestGDB" is missing from the type info,
and we cant set a breakpoint on it either:
(gdb) b TestGDB.TestGDB
the class TestGDB does not have any method named TestGDB
Hint: try 'TestGDB.TestGDB<TAB> or 'TestGDB.TestGDB<ESC-?>
(Note leading single quote.)
>How-To-Repeat:
>Fix:
>Unformatted:
