161716 2016-09-07 15:52:16 -0700 Web Inspector: Stepping into a function / program should not require stepping to the first statement 2016-09-30 12:36:57 -0700 1 1 1 Unclassified WebKit Web Inspector WebKit Nightly Build All All RESOLVED DUPLICATE 155325 InRadar P2 Normal --- 1 joepeck joepeck bburg joepeck mark.lam mattbaker nvasilyev saam timothy webkit-bug-importer ysuzuki oldest_to_newest 1227383 0 joepeck 2016-09-07 15:52:16 -0700 Summary: Stepping into a function should not require stepping to the first statement Test: 1. <script> 2. function foo() { 3. console.log("foo"); 4. } 5. foo(); 6. </script> Steps to Reproduce: 1. Inspect test page 2. Set a breakpoint on line 5 3. Reload => Hits breakpoint, pauses on line 5 4. Step-in => Pauses on line 2 for the function definition, you have to step to get to line 3 => Expected to pause on line 3 which is the first statement in foo Notes: - lldb pause on line 3 before the first statement in foo - Chrome pauses on line 3 before the first statement in foo - Firefox pauses on line 3 before the first statement in foo - I think this is us pausing at Debugger::callEvent. Seems we can just not pause there. I'm not sure if there is any reason to pause there. 1227384 1 webkit-bug-importer 2016-09-07 15:52:33 -0700 <rdar://problem/28196590> 1227480 2 joepeck 2016-09-07 19:09:53 -0700 This is the same for stepping into a program. Test: 1. <script> 2. var before = 1; 3. eval("1 + 1"); 4. var after = 1; 5. </script> There are 3 pauses on line 3 because when we step-into we pause at 3 locations: PausedAtStartOfProgram PausedAtEndOfProgram PausedAtStatement 1227510 3 joepeck 2016-09-07 20:57:47 -0700 After a long discussion with coworkers I think we all agree that there is very little value in pausing at the start of a program. Since there is nothing you can do that is different from pausing at the first statement within it. However there is value in pausing at the end of a program / end of a function. Since that is the last opportunity to view the state of things within the function (the value of the last statement for instance). 1227515 4 288240 joepeck 2016-09-07 21:14:58 -0700 Created attachment 288240 [PATCH] Proposed Fix 1227516 5 288240 joepeck 2016-09-07 21:15:16 -0700 Comment on attachment 288240 [PATCH] Proposed Fix cq- this depends on an earlier patch so it won't apply yet. 1227692 6 bburg 2016-09-08 12:12:27 -0700 (In reply to comment #2) > This is the same for stepping into a program. > > Test: > 1. <script> > 2. var before = 1; > 3. eval("1 + 1"); > 4. var after = 1; > 5. </script> > > There are 3 pauses on line 3 because when we step-into we pause at 3 > locations: > > PausedAtStartOfProgram > PausedAtEndOfProgram > PausedAtStatement >:( 1227695 7 288240 bburg 2016-09-08 12:16:19 -0700 Comment on attachment 288240 [PATCH] Proposed Fix View in context: https://bugs.webkit.org/attachment.cgi?id=288240&action=review > LayoutTests/inspector/debugger/stepInto-expected.txt:-19 > -PAUSE AT testAlert:6:19 Nice nice. > Source/JavaScriptCore/debugger/Debugger.h:-95 > - PausedAfterCall, Is this completely redundant with PauseBeforeReturn? It doesn't seem like its removal caused any fewer pauses to happen in the test expectations. 1227704 8 288240 bburg 2016-09-08 12:21:33 -0700 Comment on attachment 288240 [PATCH] Proposed Fix View in context: https://bugs.webkit.org/attachment.cgi?id=288240&action=review r=me >> Source/JavaScriptCore/debugger/Debugger.h:-95 >> - PausedAfterCall, > > Is this completely redundant with PauseBeforeReturn? It doesn't seem like its removal caused any fewer pauses to happen in the test expectations. EDIT: this is for pausing when calling a function but before running the first statement. It's redundant with PausedAtStatement for the first statement. 1228838 9 joepeck 2016-09-12 12:07:04 -0700 I rewrote everything here in an effort to fix other debugger stepping issues. I'm going to obsolete this patch. And likely duplicate this bug to a more general bug that addresses the larger stepping issues. 1235346 10 joepeck 2016-09-30 12:36:57 -0700 Fixed as part of bug 155325: https://trac.webkit.org/changeset/206652 *** This bug has been marked as a duplicate of bug 155325 *** 288240 2016-09-07 21:14:58 -0700 2016-09-12 12:07:14 -0700 [PATCH] Proposed Fix stepping-3.patch text/plain 6807 joepeck ZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL0NoYW5nZUxvZyBiL0xheW91dFRlc3RzL0NoYW5nZUxv ZwppbmRleCAwYWIyNTYwLi43ZmMxOTA4IDEwMDY0NAotLS0gYS9MYXlvdXRUZXN0cy9DaGFuZ2VM b2cKKysrIGIvTGF5b3V0VGVzdHMvQ2hhbmdlTG9nCkBAIC0xLDUgKzEsMTggQEAKIDIwMTYtMDkt MDcgIEpvc2VwaCBQZWNvcmFybyAgPHBlY29yYXJvQGFwcGxlLmNvbT4KIAorICAgICAgICBXZWIg SW5zcGVjdG9yOiBTdGVwcGluZyBpbnRvIGEgZnVuY3Rpb24gLyBwcm9ncmFtIHNob3VsZCBub3Qg cmVxdWlyZSBzdGVwcGluZyB0byB0aGUgZmlyc3Qgc3RhdGVtZW50CisgICAgICAgIGh0dHBzOi8v YnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xNjE3MTYKKyAgICAgICAgPHJkYXI6Ly9w 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