[Mono-devel-list] monodebugger - Inserting breakpoints in a method that has been JITted
writetorex at rediffmail.com
Tue Jan 18 22:32:59 EST 2005
Have a question on how the mono debugger, given a sourceline number finds the address in memory where a software breakpoint
instruction has to be written.
After looking at the code it looks like the symbol file is used to find the address corresponding to a source line.
For a method that is already JITted, can we not use the following method?
1.Remember/Store the ILOffset to memory address mapping for each method that is JITted.
This can be done in mono_arch_output_basic_block in mini-x86.c (and is already being done
via a call to mono_debug_record_line_number).
2.When an "insert breakpoint" is requested on a particular source line, find the ILOffset for the source line, for the method.
Lookup the ILOffset to memory address mapping that we stored and find the memory address in
3.Remember/Store the original instruction at the memory address and replace it with a software breakpoint.
Is there any particular reason why the above mentioned scheme would fail?
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