Special report: gdb 5.1 versus gdb 5.1.1

[Michael Elizabeth Chastain <mec at shout dot net>]

Special report: gdb 5.1 versus gdb 5.1.1

Usually I compare across time: previous results versus current results for
a given configuration.  This report is across versions: gdb 5.1 versus
gdb 5.1.1 using the same software.

Summary: there is one regression from 5.1 to 5.1.1 in gdb.base/interrupt.exp.

The test matrix is:

  target: i686-pc-linux-gnulibc2.2-rh7.2
  host:   native
  dates:  2002-02-01T23:20:11-0800 to 2002-02-01T23:47:29-0800
  gdb:    5.1, 5.1.1
  gcc:    2.95.3, 3.0.2, 3.0.3, gcc-3_0-branch, HEAD
  format: -gdwarf-2, -gstabs+

Baseline software:

  gnu make 3.79.1
  binutils 2.11.2
  gcc 3.0.3
  tcl 8.3.4
  expect 5.33.0
  dejagnu 1.4.2

There are significant differences in these configurations:

  native i686-pc-linux-gnulibc2.2-rh7.2, gcc HEAD, -gdwarf2

    gdb 5.1 does not work at all in this configuration due to new dwarf2
    constructs that it does not understand.

    gdb 5.1.1 works reasonably well.

  native i686-pc-linux-gnulibc2.2-rh7.2, gcc HEAD, -gstabs+

    gdb 5.1 has 24 ERRORs, 2 WARNINGs, and 304 FAILs.  This is probably
    not usable.

    gdb 5.1.1 has 0 ERRORs, 0 WARNINGs, and 181 FAILs.  This is similar
    to other configurations and is mostly better than gdb 5.1.

    gdb.base/interrupt.exp has a regression in this configuration.
    Here are log excerpts:

      # gdb 5.1, gcc-HEAD, -gstabs+
      (gdb) PASS: gdb.base/interrupt.exp: call function a second time
      continue
      Continuing.
      PASS: gdb.base/interrupt.exp: continue
      data
      PASS: gdb.base/interrupt.exp: echo data
      Unknown error 512
      data
      end of file
      
      Program exited normally.
      (gdb) XPASS: gdb.base/interrupt.exp: send end of file
      testcase /berman/migchain/source/gdb-5.1/gdb/testsuite/gdb.base/interrupt.exp completed in 3 seconds

      # gdb 5.1.1, gcc-HEAD, -gstabs+
      (gdb) PASS: gdb.base/interrupt.exp: call function a second time
      continue
      Continuing.
      Unknown error 512
      FAIL: gdb.base/interrupt.exp: continue (timeout)
      data
      data
      FAIL: gdb.base/interrupt.exp: echo data (timeout)
      end of file
      
      Program exited normally.
      (gdb) XPASS: gdb.base/interrupt.exp: send end of file
      testcase /berman/migchain/source/gdb-5.1.1/gdb/testsuite/gdb.base/interrupt.exp completed in 123 seconds

    This test script works correctly for gdb-HEAD on all five compilers
    (gcc 2.95.3, gcc 3.0.2, gcc 3.0.3, gcc gcc-3_0-branch, gcc HEAD)
    and two debug formats (-gdwarf-2, -gstabs+).  So I am going to file
    a PR on this, leave it open for a few days in case people want to
    comment on it, and then close the PR.