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Diffstat (limited to 'etc/DEBUG')
| -rw-r--r-- | etc/DEBUG | 35 |
1 files changed, 3 insertions, 32 deletions
diff --git a/etc/DEBUG b/etc/DEBUG index 045444d11ae..42b965b098f 100644 --- a/etc/DEBUG +++ b/etc/DEBUG @@ -1,5 +1,5 @@ Debugging GNU Emacs -Copyright (c) 1985 Richard M. Stallman. +Copyright (c) 1985, 2000 Free Software Foundation, Inc. Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the @@ -12,23 +12,6 @@ Copyright (c) 1985 Richard M. Stallman. under the above conditions, provided also that they carry prominent notices stating who last changed them. -On 4.2 you will probably find that dbx does not work for -debugging GNU Emacs. For one thing, dbx does not keep the -inferior process's terminal modes separate from its own. -For another, dbx does not put the inferior in a separate -process group, which makes trouble when an inferior uses -interrupt input, which GNU Emacs must do on 4.2. - -dbx has also been observed to have other problems, -such as getting incorrect values for register variables -in stack frames other than the innermost one. - -The Emacs distribution now contains GDB, the new source-level -debugger for the GNU system. GDB works for debugging Emacs. -GDB currently runs on vaxes under 4.2 and on Sun 2 and Sun 3 -systems. - - ** Some useful techniques `Fsignal' is a very useful place to stop in. @@ -50,21 +33,9 @@ to get an opportunity to do the set command. If you are using cbreak input (see the Lisp function set-input-mode), then typing Control-g will cause a SIGINT, which will return control -to the debugger immediately unless you have done - - ignore 3 (in dbx) -or handle 3 nostop noprint (in gdb) - -You will note that most of GNU Emacs is written to avoid -declaring a local variable in an inner block, even in -cases where using one would be the cleanest thing to do. -This is because dbx cannot access any of the variables -in a function which has even one variable defined in an -inner block. A few functions in GNU Emacs do have variables -in inner blocks, only because I wrote them before realizing -that dbx had this problem and never rewrote them to avoid it. +to GDB immediately if you type this command first: -I believe that GDB does not have such a problem. + handle 2 stop ** Examining Lisp object values. |