Thanks.
On 30/12/2013 23:38, Jonathan Pryor wrote:
On Dec 30, 2013, at 9:25 AM, Andrei Faber <[email protected]> wrote:
Why debugging symbols are required to show full stack trace? MS .NET doesn't
require that.
Good question -- it doesn't make sense, as the methods are still present in the
IL.
Using `mcs -debug+` doesn't help either, so that's not actually an answer:
$ mcs -debug+ st.cs
$ mono --debug st.exe
System.ApplicationException: An application exception has occurred.
at Program.Main (System.String[] args) [0x00001] in
/Users/jon/tmp/csharp/st.cs:8
So what's going on? Inlining: Foo() and Bar() are so small that the JIT is
inlining them, so Main() _is_ throwing ApplicationException.
Which doesn't entirely help you when you experience this...
The workaround? Specify --debug=mdb-optimizations (see `mono --help-debug`),
which:
Disable some JIT optimizations which are normally
disabled when running inside the debugger.
This is useful if you plan to attach to the running
process with the debugger.
Thus:
$ mono --debug=mdb-optimizations st.exe
System.ApplicationException: An application exception has occurred.
at Program.Bar () [0x00001] in /Users/jon/tmp/csharp/st.cs:24
at Program.Foo () [0x00001] in /Users/jon/tmp/csharp/st.cs:19
at Program.Main (System.String[] args) [0x00002] in
/Users/jon/tmp/csharp/st.cs:9
Alternatively, you could disable inlining (`mono --list-opt`):
$ mono --debug --optimize=-inline st.exe
System.ApplicationException: An application exception has occurred.
at Program.Bar () [0x00001] in /Users/jon/tmp/csharp/st.cs:24
at Program.Foo () [0x00001] in /Users/jon/tmp/csharp/st.cs:19
at Program.Main (System.String[] args) [0x00002] in
/Users/jon/tmp/csharp/st.cs:9
- Jon
--
Best wishes,
Andrei Faber
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