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| author | Steve Bennett <steveb@workware.net.au> | 2011-12-02 13:24:38 +1000 |
|---|---|---|
| committer | Steve Bennett <steveb@workware.net.au> | 2021-01-09 11:06:48 +1000 |
| commit | fe37b8dc2536b70d0aba3c6a70ead466ebe5b9d6 (patch) | |
| tree | f4e3db58f298facf7cf84272d3a3321144c23d32 /jim_tcl.txt | |
| parent | b8018299ad54fecfdcffe4b22ac994944a716f2a (diff) | |
| download | jimtcl-fe37b8dc2536b70d0aba3c6a70ead466ebe5b9d6.zip jimtcl-fe37b8dc2536b70d0aba3c6a70ead466ebe5b9d6.tar.gz jimtcl-fe37b8dc2536b70d0aba3c6a70ead466ebe5b9d6.tar.bz2 | |
Add the [xtrace] command
Allows a debugger or tracing facility to be implemented
Signed-off-by: Steve Bennett <steveb@workware.net.au>
Diffstat (limited to 'jim_tcl.txt')
| -rw-r--r-- | jim_tcl.txt | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/jim_tcl.txt b/jim_tcl.txt index 24ea60b..6b25338 100644 --- a/jim_tcl.txt +++ b/jim_tcl.txt @@ -58,7 +58,8 @@ Changes since 0.80 2. Many commands now accept "safe" integer expressions rather than simple integers: `loop`, `range`, `incr`, `string repeat`, `lrepeat`, `pack`, `unpack`, `rand` 3. String and list indexes now accept integer expressions (<<_string_and_list_index_specifications,STRING AND LIST INDEX SPECIFICATIONS>>) -4. `loop` can now omit start value +4. `loop` can now omit the start value +5. Add the `xtrace` command for execution trace support Changes between 0.79 and 0.80 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -4729,6 +4730,28 @@ termination of the `while` command. The `while` command always returns an empty string. +xtrace +~~~~~~ ++*xtrace* 'command'+ + +Install an execution trace callback command. This is useful for implementing a debugger +or tracing tool. On each command invocation, the given command is invoked as: + +---- + command proc|cmd filename line result command arglist +---- + ++'proc'+ or +'cmd'+ indicates whether a command or a proc body is being executed. ++'filename'+ and +'line'+ indicate the location where the command was invoked. ++'result'+ is the current interpreter result (from the previous command). ++'command'+ and +'arglist'+ indicate the command being executed. + +While the callback is executing, any further execution traces are temporarily disabled. +If the callback returns +JIM_OK+ or +JIM_RETURN+, the execution trace is reinstalled. Otherwise +the execution trace is removed. + +If +*xtrace*+ is called with an empty argument (""), any existing callback is removed. + OPTIONAL-EXTENSIONS ------------------- |