mi/1101: disassembly broken for mi and Insight

[hunt at redhat dot com]

>Number:         1101
>Category:       mi
>Synopsis:       disassembly broken for mi and Insight
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Thu Feb 27 21:08:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     hunt at redhat dot com
>Release:        cvs head 02/27/03
>Organization:
>Environment:
RH Linux 8.0 native build
>Description:
Insight and MI have the same flawed mixed-mode disassembly. 
In disasm.c, we have
  /* Assume symtab is valid for whole PC range */
  symtab = find_pc_symtab (low);
The assumption is not correct.  When GDB picks the wrong one, the output in MI or Insight will be blank.
>How-To-Repeat:
Easiest way to reproduce is use gdb.base/list test case.

~/redhat/build/gdb> ./gdb -i=mi testsuite/gdb.base/list
~"GNU gdb 2003-02-27-cvs\n"
~"Copyright 2003 Free Software Foundation, Inc.\n"
~"GDB is free software, covered by the GNU General Public License, and you are\n"
~"welcome to change it and/or distribute copies of it under certain conditions.\n"
~"Type \"show copying\" to see the conditions.\n"
~"There is absolutely no warranty for GDB.  Type \"show warranty\" for details.\n"
~"This GDB was configured as \"i686-pc-linux-gnu\"..."
~"\n"
~"Setting up the environment for debugging gdb.\n"
&".gdbinit:5: Error in sourced command file:\n"
&"Function \"internal_error\" not defined.\n"
(gdb)
b foo
&"b foo\n"
^done
(gdb)
r
&"r\n"
^done,reason="breakpoint-hit",bkptno="1",thread-id="0",frame={addr="0x08048362",func="foo",args=[{name="x",value="0"}],file="../../../src/gdb/testsuite/gdb.base/list0.h",line="9"}
(gdb)
111-data-disassemble -s $pc -e "$pc + 12" -- 0
111^done,asm_insns=[{address="0x08048362",func-name="foo",offset="6",inst="sub    $0xc,%esp"},{address="0x08048365",func-name="foo",offset="9",inst="mov    0x8(%ebp),%eax"},{address="0x08048368",func-name="foo",offset="12",inst="push   %eax"},{address="0x08048369",func-name="foo",offset="13",inst="incl   0x8(%ebp)"},{address="0x0804836c",func-name="foo",offset="16",inst="call   0x8048774 <bar>"}](gdb)
111-data-disassemble -s $pc -e "$pc + 12" -- 1
111^done,asm_insns=[]
(gdb)

On Insight,  run insight on "list", set a bp on foo.  Continue to there.
Select MIXED mode display.  It will be blank.
>Fix:
None yet.
>Release-Note:
>Audit-Trail:
>Unformatted: