Bug 15168 - Stepping from property does not stop at caller frame
Summary: Stepping from property does not stop at caller frame
Alias: None
Product: Runtime
Classification: Mono
Component: Debugger ()
Version: 3.2.x
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Zoltan Varga
Depends on:
Reported: 2013-10-03 10:27 UTC by Marek Safar
Modified: 2015-01-07 11:51 UTC (History)
4 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Marek Safar 2013-10-03 10:27:59 UTC

Sample code

using System;
using System.Net.Http;

class Test
	public static void Main ()
		var userAgent = "Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Mobile/11A465";
		var client = new HttpClient();
Comment 1 Zoltan Varga 2013-12-05 15:34:44 UTC
Doing a step over from the last line of the DefaultRequestHeaders accessor skips over the UserAgent and ParseAdd calls.
Comment 2 Zoltan Varga 2013-12-06 16:31:54 UTC
So we don't stop in the the end of the get_DefaultRequestHeaders method because it only has one seq point:

    <method token="0x6000014" signature="System.Net.Http.Headers.HttpRequestHeaders System.Net.Http.HttpClient::get_DefaultRequestHeaders()">
        <entry il="0x0" row="76" col="5" file_ref="7" />
      <locals />
      <scopes />

and we don't stop before the UserAgent call, because the IL stack is not empty, and we don't stop there doing step overs, so we can step over nested calls.
Comment 3 Rodrigo Kumpera 2014-01-09 15:17:18 UTC
This looks like a compiler bug, Marek?
Comment 4 Marek Safar 2014-01-10 08:34:34 UTC
It's not compiler bug. You need to build mono with --disable-bcl-opt to have precise sequence points but even with that it still does not work.
Comment 5 Rodrigo Kumpera 2014-01-10 10:16:51 UTC
How come? It's missing a seqpoint at a non obvious place. How could sdb figure out where to stop?
Comment 6 Marek Safar 2014-01-10 10:19:15 UTC
It's not missing anything if you compile BCL with debugging support (otherwise there is no sequence point at closing "}" but that's expected).
Comment 7 Zoltan Varga 2015-01-07 11:51:39 UTC
This works now.