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e60f641d9b
Estimated hours taken: 6 Make it possible to save the state of a debugger session wrt break points and aliases in a file that can be sourced in another debugger session to restore the state. trace/mercury_trace_internal.c: Add a new mdb command, "save <filename>", to save mdb's state to the named file. Allow the "disable", "enable" and "delete" commands to be given without arguments; such invocations refer to the most recently created breakpoint. The extension to "disable" is required by the implementation of the "save" command; the others are for symmetry. Allow the user to speficy an option to the source command that tells mdb not to complain if the named file cannot be processed. This should allow people to put into .mdbrc files commands to source saved state files if they exist and not get complaints if they don't. Make several messages conform to our convention that error messages start with "mdb: ". trace/mercury_trace_spy.[ch]: Add code to implement the part of the "save" command concerned with breakpoints. Unfortunately, there is no simple way to save the specification of breakpoints created with "break here", so for the time being they are not saved. This should not be too much of a problem, since such breakpoints are rarely used. Maintain a variable that identifies the most recently added breakpoint, if any. Also move the function to print out breakpoints here from mercury_trace_internal.c, in order to centralize knowledge about breakpoints here. trace/mercury_trace_alias.[ch]: Add code to implement the part of the "save" command concerned with aliases. Fix some occurrences of an old bug: use MR_free, not free, to free strings allocated with MR_copy_string. trace/mercury_stack_trace.[ch]: Add a version of MR_print_proc_id that prints proc ids in a form suitable for mdb procedure specifications. doc/user_guide.texi: Document the "save" command and the new usage modes of the other modified commands. tests/debugger/mdb_command_test.inp: Test the existence of documentation for the "save" command. tests/debugger/polymorphic_output.exp: Update an expected error message.
14 lines
425 B
Plaintext
14 lines
425 B
Plaintext
1: 1 1 CALL pred polymorphic_output:main/2-0 (det) polymorphic_output.m:20
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mdb> echo on
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Command echo enabled.
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mdb> register --quiet
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mdb> context none
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Contexts will not be printed.
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mdb> b std_util__det_arg
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mdb: there is no such procedure.
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mdb> c
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Uncaught exception:
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Software Error: det_arg: argument number out of range
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Last trace event was event #7.
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Last trace event before the unhandled exception was event #4.
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