Weird gdb problem

Tue Jul 18 16:07:00 GMT 2006

Andrew Haley writes:
 > I seem to have broken the debuginfo from gcj. 
 > 
 > When I step into a Java method I don't get info about args passed to
 > methods. But this is only for debuginfo compiled into libgcj -- when
 > I compile a test case myself I get correct args displayed. As in this
 > one, where I step into p.p(), the argument "this" is displayed:
 > 
 > 
 > (gdb) s
 > p.p() (this=@2aaaad588e30) at Hello.java:7
 > (gdb) 
 > 0x00002aaaac057820 in java.lang.Object.Object() ()
 > at /mnt/zebedee/aph/gcc/gcj-eclipse/libjava/java/lang/Object.java:360
 > 
 > 
 > Note that the first step gave the value of the "this" argument, and
 > the second one (in libgcj) didn't. Continuing:
 > 
 > 
 > (gdb) 
 > java.io.PrintStream.println(java.lang.String)void ()
 > at /mnt/zebedee/aph/gcc/gcj-eclipse/libjava/java/io/PrintStream.java:482
 > (gdb) info args
 > No arguments.
 > 
 > 
 > So, to recap: I get values of args to methods displayed in gdb, but
 > only when I compile test cases. When stepping into libgcj itself, the
 > values of args aren't displayed.
 > 
 > So ... might anyone in gdb land like to guess how this might have broken?
We might have found the bug. Sorry for the noise...
Andrew.