[meta] clang errors from DragonFly BSD kernel build

[llvmbot]

Bugzilla Link	2778
Resolution	FIXED
Resolved on	Feb 22, 2010 12:45
Version	unspecified
OS	All
Depends On	llvm/llvm-bugzilla-archive#2845 llvm/llvm-bugzilla-archive#3000 llvm/llvm-bugzilla-archive#3003
Attachments	tarball of the crashes dir
Reporter	LLVM Bugzilla Contributor
CC	@tkremenek,@nunoplopes

Extended Description

Hi,

find attached the contents of the crashes/ dir for a buildkernel in DragonFly using the LINT kernel configuration (pulls in as much as possible). Note that I had to select 'All' in the 'OS' in lieu of a better selection.

SVN revision 55870.

Regards,
Sascha

[llvmbot]

assigned to @tkremenek

[llvmbot]

Of all the files in the tarball, there are two instances where clang hits an assertion:

clang_crash_tSQjGs.i.output:
assertion "StmtDataMap && "Dataflow values were not computed for statements."" failed: file "/home/s/tmp/compile/llvm/tools/clang/lib/Analysis/../../include/clang/Analysis/FlowSensitive/DataflowValues.h", line 118

clang_crash_x8M5Lx.i.output:
assertion "StmtDataMap && "Dataflow values were not computed for statements."" failed: file "/home/s/tmp/compile/llvm/tools/clang/lib/Analysis/../../include/clang/Analysis/FlowSensitive/DataflowValues.h", line 118

Using TOT (r58361), I don't get this assertion failure with either file.

I'm looking at the parser rejects (they're still being rejected), and I've found a way to segfault clang using one of the .i files in the tarball.

If it's okay, I'll use this bug as a meta bug and file new bugs that block this one as I find issues.

[tkremenek]

Of all the files in the tarball, there are two instances where clang hits an
assertion:

clang_crash_tSQjGs.i.output:
assertion "StmtDataMap && "Dataflow values were not computed for statements.""
failed: file
"/home/s/tmp/compile/llvm/tools/clang/lib/Analysis/../../include/clang/Analysis/FlowSensitive/DataflowValues.h",
line 118

clang_crash_x8M5Lx.i.output:
assertion "StmtDataMap && "Dataflow values were not computed for statements.""
failed: file
"/home/s/tmp/compile/llvm/tools/clang/lib/Analysis/../../include/clang/Analysis/FlowSensitive/DataflowValues.h",
line 118

Using TOT (r58361), I don't get this assertion failure with either file.

I recall fixing a case recently that triggered this assertion, but off the top of my head I don't remember the issue or the commit.

I'm looking at the parser rejects (they're still being rejected), and I've
found a way to segfault clang using one of the .i files in the tarball.

If it's okay, I'll use this bug as a meta bug and file new bugs that block this
one as I find issues.

That sounds great. I'm really sorry I haven't gotten to drilling through these yet. Small reduced test cases will really help in fixing specific issues.

[llvmbot]

I've poked at this bug as much as I can with just preprocessor output to look at. See this bug's "depends on" list for bugs found from the parser rejects.

[tkremenek]

I've poked at this bug as much as I can with just preprocessor output to look
at. See this bug's "depends on" list for bugs found from the parser rejects.

Thanks Richard!

[tkremenek]

Can this be closed?

[llvmbot]

Closing this one.

The error situation for the DragonFly kernel has improved a lot. There are a few errors left, though, but I'll file individual bug reports for them.

[nunoplopes]

mentioned in issue llvm/llvm-bugzilla-archive#2845

[llvmbot]

mentioned in issue llvm/llvm-bugzilla-archive#3000

[llvmbot]

mentioned in issue llvm/llvm-bugzilla-archive#3003