SIGSEGV on cygwin #283

hiyuh · 2016-03-16T15:56:06Z

i got,

$ make check
...
Running suite(s): lib
100%: Checks: 3, Failures: 0, Errors: 0
PASS: bin/test_lib.exe
Running suite(s): ident
100%: Checks: 15, Failures: 0, Errors: 0
PASS: bin/test_ident.exe
Running suite(s): parse
100%: Checks: 35, Failures: 0, Errors: 0
PASS: bin/test_parse.exe
Running suite(s): sem
100%: Checks: 76, Failures: 0, Errors: 0
PASS: bin/test_sem.exe
Running suite(s): simplify
100%: Checks: 8, Failures: 0, Errors: 0
PASS: bin/test_simp.exe
Running suite(s): elab
100%: Checks: 26, Failures: 0, Errors: 0
PASS: bin/test_elab.exe
Running suite(s): heap
100%: Checks: 3, Failures: 0, Errors: 0
PASS: bin/test_heap.exe
Running suite(s): hash
100%: Checks: 3, Failures: 0, Errors: 0
PASS: bin/test_hash.exe
Running suite(s): group
100%: Checks: 11, Failures: 0, Errors: 0
PASS: bin/test_group.exe
Running suite(s): bounds
100%: Checks: 11, Failures: 0, Errors: 0
PASS: bin/test_bounds.exe
Running suite(s): value
100%: Checks: 2, Failures: 0, Errors: 0
PASS: bin/test_value.exe
Running suite(s): lower
100%: Checks: 49, Failures: 0, Errors: 0
PASS: bin/test_lower.exe
          wait1 : failed
...

to check why wait1 failed, run its regression manually, and i got,

$ /home/hiyuh/git-repos/nvc/bin/nvc  -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1  --disable-opt -r wait1
** Error: library STD not found in:
            /home/hiyuh/.nvc/lib
            /usr/local/share/nvc

** Fatal: failed to find std library

update: oops, submitted draft accidentally. :)

The text was updated successfully, but these errors were encountered:

nickg · 2016-03-16T16:59:23Z

The run_regr.rb automatically adds $(top_builddir)/lib to the library search path. Try adding -L/home/hiyuh/git-repos/nvc/lib before the -a above.

The regression test script should automatically print all the output from nvc when it fails so I'm not sure why you don't get anything.

hiyuh · 2016-03-17T01:48:52Z

Try adding -L/home/hiyuh/git-repos/nvc/lib before the -a above.

sorry, i forget to add appropriate -L as you mentioned.

$ /home/hiyuh/git-repos/nvc/bin/nvc  -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1  --disable-opt -r wait1
Segmentation fault (core dumped)

i'll do more check soonish...

... I'm not sure why you don't get anything.

b/c it looks SIGSEGV.
NVC on cygwin defines NO_STACK_TRACE, so is unable to handle it ATM, IIRC.

hiyuh · 2016-03-17T02:33:17Z

FYI,

$ gdb ./bin/nvc.exe
...
(gdb) r  -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1  --disable-opt -r wait1
Starting program: /home/hiyuh/git-repos/nvc/bin/nvc.exe -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1  --disable-opt -r wait1
[New Thread 8392.0x2da4]
[New Thread 8392.0x3690]

Program received signal SIGSEGV, Segmentation fault.
deltaq_insert_proc (wake=0x0, delta=2738036) at src/rt/rtkern.c:1133
1133       e->wakeup_gen = wake->wakeup_gen;
(gdb) bt
#0  deltaq_insert_proc (wake=0x0, delta=2738036) at src/rt/rtkern.c:1133
#1  _sched_process (delay=2738036) at src/rt/rtkern.c:357
#2  0x00000000 in ?? ()
(gdb)

it looks wake of deltaq_insert_proc() = active_proc of _sched_process() is NULL.

using --trace, NVC prints only 1 line trace log as expected from above.

$ /home/hiyuh/git-repos/nvc/bin/nvc  -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1  --disable-opt -r --trace wait1
TRACE (init): _sched_process delay=2738212fs
Segmentation fault (core dumped)

as i reported above, it looks delta is also garbage.

w/o --trace on gdb, delta = 2738036.
w/ --trace, delta = 2738212.

update: add trace log.
update: comment WRT delta.

nickg · 2016-03-21T04:53:09Z

I think the delta= issue is a probably a bug printing 64bit numbers.

I guess this happens running any simulation? What version of llvm?

hiyuh · 2016-03-22T00:38:05Z

I guess this happens running any simulation?

maybe, yes.
all bin/test_*.exe passed, but all regressions failed w/o any particular/meaningful message except library loading failure notice w/ garbage library name.

What version of llvm?

$ llvm-config.exe --version
3.7.1
$ cygcheck.exe -f /usr/bin/llvm-config.exe
libllvm-devel-3.7.1-1

nickg · 2016-04-04T18:29:47Z

I tried with LLVM 3.7 on Linux and don't get this failure. Is it possible to try with another LLVM version on Cygwin that was known to work?

hiyuh · 2016-04-05T02:12:34Z

Is it possible to try with another LLVM version on Cygwin that was known to work?

LLVM 3.5 looks working on cygwin.
maybe, LLVM 3.7 on cygwin is simply broken?

$ llvm-config-3.5.exe --version
3.5.2

$ cygcheck.exe -f /usr/bin/llvm-config-3.5.exe
libllvm3.5-devel-3.5.2-2

$ ./configure --enable-fst-pthread --enable-native --enable-vhpi --with-llvm=/usr/bin/llvm-config-3.5.exe
...

$ make check
...
===================
All 13 tests passed
===================

nickg · 2016-04-09T18:32:49Z

There's some code in src/rt/jit.c that's conditionally enabled if LLVM_HAS_MCJIT is defined, and this only happens when >= 3.6. It could be the MCJIT code doesn't work on Cygwin for some reason, although I can't see why. You could try elaborating and running e.g. wait1.vhd with --native and see if that works, as that will bypass JIT.

hiyuh · 2016-04-11T04:53:56Z

as you mentioned about LLVM_HAS_MCJIT, i've also noticed this difference.

and here's weird result, it looks NVC fails to run if --disable-opt is used when elab?

$ cygcheck.exe -f /usr/bin/llvm-config.exe
libllvm-devel-3.7.1-1

$ /usr/bin/llvm-config.exe --version
3.7.1

$ ./configure --enable-fst-pthread --enable-native --enable-vhpi --with-llvm=/usr/bin/llvm-config.exe
....

$ make check
....
Running suite(s): lib
100%: Checks: 3, Failures: 0, Errors: 0
PASS: bin/test_lib.exe
Running suite(s): ident
100%: Checks: 15, Failures: 0, Errors: 0
PASS: bin/test_ident.exe
Running suite(s): parse
100%: Checks: 35, Failures: 0, Errors: 0
PASS: bin/test_parse.exe
Running suite(s): sem
100%: Checks: 77, Failures: 0, Errors: 0
PASS: bin/test_sem.exe
Running suite(s): simplify
100%: Checks: 8, Failures: 0, Errors: 0
PASS: bin/test_simp.exe
Running suite(s): elab
100%: Checks: 26, Failures: 0, Errors: 0
PASS: bin/test_elab.exe
Running suite(s): heap
100%: Checks: 3, Failures: 0, Errors: 0
PASS: bin/test_heap.exe
Running suite(s): hash
100%: Checks: 3, Failures: 0, Errors: 0
PASS: bin/test_hash.exe
Running suite(s): group
100%: Checks: 11, Failures: 0, Errors: 0
PASS: bin/test_group.exe
Running suite(s): bounds
100%: Checks: 11, Failures: 0, Errors: 0
PASS: bin/test_bounds.exe
Running suite(s): value
100%: Checks: 2, Failures: 0, Errors: 0
PASS: bin/test_value.exe
Running suite(s): lower
100%: Checks: 49, Failures: 0, Errors: 0
PASS: bin/test_lower.exe
          wait1 : failed
/home/hiyuh/git-repos/nvc/bin/nvc  -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1  --disable-opt -r wait1
...

$ /home/hiyuh/git-repos/nvc/bin/nvc  -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1 --disable-opt -r --trace wait1
TRACE (init): _sched_process delay=2738212fs
Segmentation fault (core dumped)

$ /home/hiyuh/git-repos/nvc/bin/nvc  -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1 --disable-opt

$ NVC_CYG_LIB=/home/hiyuh/git-repos/nvc/lib /home/hiyuh/git-repos/nvc/bin/nvc  -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1 --native
/usr/bin/llc -relocation-model=pic /home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.final.bc -filetype=obj
/usr/bin/gcc -shared -Wl,--export-all-symbols -Wl,--out-implib=/home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.elab.a -o /home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.final.so /home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.final.obj -L/home/hiyuh/git-repos/nvc/lib -lnvcimp

$ NVC_CYG_LIB=/home/hiyuh/git-repos/nvc/lib /home/hiyuh/git-repos/nvc/bin/nvc  -L /home/hiyuh/git-repos/nvc/lib -a /home/hiyuh/git-repos/nvc/test/regress/wait1.vhd -e wait1 --native -r --trace wait1
/usr/bin/llc -relocation-model=pic /home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.final.bc -filetype=obj
/usr/bin/gcc -shared -Wl,--export-all-symbols -Wl,--out-implib=/home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.elab.a -o /home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.final.so /home/hiyuh/git-repos/nvc/work/_WORK.WAIT1.final.obj -L/home/hiyuh/git-repos/nvc/lib -lnvcimp
TRACE (init): reset module WORK.WAIT1.elab
TRACE (init): reset process :wait1:line_8
TRACE (init): _sched_process delay=0ms
TRACE (init): calculate initial driver values
TRACE (init): used 0 bytes of global temporary stack
TRACE 0ms+0: begin cycle
delta   process  :wait1:line_8
TRACE 0ms+0: run process :wait1:line_8
TRACE 0ms+0: _sched_process delay=1ns
TRACE 1ns+0: begin cycle
1ns     process  :wait1:line_8
TRACE 1ns+0: run process :wait1:line_8
TRACE 1ns+0: _sched_process delay=1fs
TRACE 1000001fs+0: begin cycle
1000001fs       process  :wait1:line_8
TRACE 1000001fs+0: run process :wait1:line_8

nickg · 2016-04-24T17:59:37Z

I think the --disable-opt behaviour is OK here: now NVC uses the LLVM API to do everything except native code generation, so you don't see it calling opt, llc, etc. when optimisations are disabled.

I'll try this on a Windows PC later in the week, see if I can figure out what's going on...

nickg · 2016-05-01T16:12:15Z

I also get the same crash on 64-bit Windows 10, but I didn't make much progress debugging it. Are you using 64-bit Windows too? It's possibly related to this: https://llvm.org/bugs/show_bug.cgi?id=24978

hiyuh · 2016-05-02T03:27:53Z

Are you using 64-bit Windows too?

yes, i'm on Windows 10 Pro 64bit w/ Cygwin x86.

hiyuh · 2016-06-08T01:12:57Z

FYI,

diff --git a/test/run_regr.rb b/test/run_regr.rb
index 7c51ae7..72d00ab 100755
--- a/test/run_regr.rb
+++ b/test/run_regr.rb
@@ -66,7 +66,8 @@ end
 def analyse_elab_run(t)
   cmd = "#{nvc} #{std t} -a #{TestDir}/regress/#{t[:name]}.vhd"
   cmd += " -e #{t[:name]} #{native}"
-  cmd += ' --disable-opt' unless t[:flags].member? 'opt'
+  #cmd += ' --disable-opt' unless t[:flags].member? 'opt'
+  cmd += ' --native'
   cmd += ' --cover' if t[:flags].member? 'cover'
   t[:flags].each do |f|
     cmd += " -#{f}" if f =~ /^g.*=.*$/
@@ -136,7 +137,7 @@ mkdir_p 'logs'
 Dir.chdir 'logs'

 ENV['NVC_LIBPATH'] = LibPath
-ENV['NVC_CYG_LIB'] = "#{BuildDir}/src"
+ENV['NVC_CYG_LIB'] = "#{BuildDir}/lib"

 HaveVHPI = !!ENV['HAVE_VHPI']

w/ above dirty change, most of regressions look ok even on Windows 10 Pro 64bit w/ Cygwin x86.
but unfortunately, it looks some attributes/records are still broken.
and maybe vhpi3.vhd is simply missing which is for issue #64?

$ make check
...
        access1 : failed (no match)
0ms+1: Report Note: 10
...
          attr5 : failed
/home/hiyuh/git-repos/nvc/bin/nvc  -a /home/hiyuh/git-repos/nvc/test/regress/attr5.vhd -e attr5  --native -r attr5
** Note: 0ms+0: Report Note: 0
        Process :attr5:line_12
        File /home/hiyuh/git-repos/nvc/test/regress/attr5.vhd, Line 16
            report integer'image(p.all'length);
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
** Fatal: 0ms+0: Assertion Error: Assertion violation.
        Process :attr5:line_12
        File /home/hiyuh/git-repos/nvc/test/regress/attr5.vhd, Line 17
            assert p.all'length = 10;
            ^^^^^^^^^^^^^^^^^^^^^^^^^
/usr/bin/llc -relocation-model=pic /home/hiyuh/git-repos/nvc/logs/attr5/work/_WORK.ATTR5.final.bc -filetype=obj
/usr/bin/gcc -shared -Wl,--export-all-symbols -Wl,--out-implib=/home/hiyuh/git-repos/nvc/logs/attr5/work/_WORK.ATTR5.elab.a -o /home/hiyuh/git-repos/nvc/logs/attr5/work/_WORK.ATTR5.final.so /home/hiyuh/git-repos/nvc/logs/attr5/work/_WORK.ATTR5.final.obj -L/home/hiyuh/git-repos/nvc/lib -lnvcimp
...
        access3 : failed
/home/hiyuh/git-repos/nvc/bin/nvc  -a /home/hiyuh/git-repos/nvc/test/regress/access3.vhd -e access3  --native -r access3
** Fatal: 0ms+0: Assertion Error: Assertion violation.
        Process :access3:line_11
        File /home/hiyuh/git-repos/nvc/test/regress/access3.vhd, Line 21
            assert s'length = 0;
            ^^^^^^^^^^^^^^^^^^^^
/usr/bin/llc -relocation-model=pic /home/hiyuh/git-repos/nvc/logs/access3/work/_WORK.ACCESS3.final.bc -filetype=obj
/usr/bin/gcc -shared -Wl,--export-all-symbols -Wl,--out-implib=/home/hiyuh/git-repos/nvc/logs/access3/work/_WORK.ACCESS3.elab.a -o /home/hiyuh/git-repos/nvc/logs/access3/work/_WORK.ACCESS3.final.so /home/hiyuh/git-repos/nvc/logs/access3/work/_WORK.ACCESS3.final.obj -L/home/hiyuh/git-repos/nvc/lib -lnvcimp

        access4 : failed
/home/hiyuh/git-repos/nvc/bin/nvc  -a /home/hiyuh/git-repos/nvc/test/regress/access4.vhd -e access4  --native -r access4
** Fatal: 0ms+0: Assertion Error: Assertion violation.
        Process :access4:line_11
        File /home/hiyuh/git-repos/nvc/test/regress/access4.vhd, Line 20
            assert p'length = 10;
            ^^^^^^^^^^^^^^^^^^^^^
/usr/bin/llc -relocation-model=pic /home/hiyuh/git-repos/nvc/logs/access4/work/_WORK.ACCESS4.final.bc -filetype=obj
/usr/bin/gcc -shared -Wl,--export-all-symbols -Wl,--out-implib=/home/hiyuh/git-repos/nvc/logs/access4/work/_WORK.ACCESS4.elab.a -o /home/hiyuh/git-repos/nvc/logs/access4/work/_WORK.ACCESS4.final.so /home/hiyuh/git-repos/nvc/logs/access4/work/_WORK.ACCESS4.final.obj -L/home/hiyuh/git-repos/nvc/lib -lnvcimp
...
        issue79 : failed
/home/hiyuh/git-repos/nvc/bin/nvc  -a /home/hiyuh/git-repos/nvc/test/regress/issue79.vhd -e issue79  --native -r issue79
** Fatal: null access dereference
        File /home/hiyuh/git-repos/nvc/test/regress/issue79.vhd, Line 38
                assert p(i).all = 2;
                       ^^^^^^^^
/usr/bin/llc -relocation-model=pic /home/hiyuh/git-repos/nvc/logs/issue79/work/_WORK.ISSUE79.final.bc -filetype=obj
/usr/bin/gcc -shared -Wl,--export-all-symbols -Wl,--out-implib=/home/hiyuh/git-repos/nvc/logs/issue79/work/_WORK.ISSUE79.elab.a -o /home/hiyuh/git-repos/nvc/logs/issue79/work/_WORK.ISSUE79.final.so /home/hiyuh/git-repos/nvc/logs/issue79/work/_WORK.ISSUE79.final.obj -L/home/hiyuh/git-repos/nvc/lib -lnvcimp
...
          vhpi3 : failed
/home/hiyuh/git-repos/nvc/bin/nvc  -a /home/hiyuh/git-repos/nvc/test/regress/vhpi3.vhd -e vhpi3  --native -r --load=/home/hiyuh/git-repos/nvc/lib/vhpi3.so.exe vhpi3
** Fatal: opening /home/hiyuh/git-repos/nvc/test/regress/vhpi3.vhd: No such file or directory

FAIL: test/run_regr.rb
...

hiyuh · 2016-08-01T07:38:29Z

FYI,

diff --git a/test/run_regr.c b/test/run_regr.c
index 4c38ee1..291a94e 100644
--- a/test/run_regr.c
+++ b/test/run_regr.c
@@ -367,8 +367,7 @@ static bool run_test(test_t *test)
    push_arg(&args, "-e");
    push_arg(&args, "%s", test->name);

-   if (!(test->flags & F_OPT))
-      push_arg(&args, "--disable-opt");
+   push_arg(&args, "--native");

    if (test->flags & F_COVER)
       push_arg(&args, "--cover");

using libllvm-devel-3.8.1-1 w/ above dirty change, most of regressions look ok even on Windows 10 Pro 64bit w/ Cygwin x86, as i reported before about 3.7.1.

faild regressions for 3.8.1 are same ones for 3.7.1; access1, attr5, access3, access4 and issue79.

nickg · 2017-05-05T18:55:47Z

Can you try the the current mingw32 branch on Cygwin? This uses the new LLVM ORC JIT engine if LLVM >= 3.9. On Msys2 it can run some simple examples at least.

hiyuh · 2017-05-08T09:57:46Z

I tried mingw32 branch on Windows 10 Pro 64bit w/ Cygwin x86,

$ uname -a
CYGWIN_NT-10.0-WOW lynx 2.8.0(0.309/5/3) 2017-04-01 20:42 i686 Cygwin

$ cygcheck.exe -c libllvm-devel
Cygwin Package Information
Package              Version        Status
libllvm-devel        3.9.1-1        OK

$ git reset --hard && git pull && git checkout mingw32 && patch -p1 < ../nvc-run_regr-native.patch
...

$ ./autogen.sh && ./configure --enable-fst-pthread --enable-native --enable-vhpi
...

$ grep -n -e 'ORC' ./config.h
172:/* LLVM has ORC JIT engine */
173:#define LLVM_HAS_ORC 1

$ make check
...

the last command make check reports some failed regressions are;
access1, attr5, access4, textio1, issue79 and issue308.
note, applied patch on above force to use --native instead of --disable-opt as i mentioned before.

mingw32 branch looks not so bad, but it looks having similar issue.

nickg · 2017-05-08T18:22:00Z

What if you revert that patch though? For me with LLVM 3.9 on MSYS2 the JIT works OK (but not loading native libraries).

hiyuh · 2017-05-09T03:13:28Z

What if you revert that patch though?

using --disable-opt looks flooding "No such file or directory".
FYI, see attached log of git reset --hard ; make check after commands of my prev post.
nvc-mingw32-vanilla.zip

nickg · 2018-01-28T22:25:21Z

Just as an update on this bug, the latest master now more-or-less works on Cygwin with modern LLVM. There are still a few test failures though.

hiyuh · 2018-01-30T04:21:19Z

$  ./autogen.sh && ./configure --enable-fst-pthread --enable-native --enable-vhpi && make
...
$ make check 2>&1 | tee log.txt
...
$ grep -e ': failed' log.txt | wc -l
6

yes, it looks you made NVC better.
only 6 regressions failed ATM. :)
log.txt

nickg · 2018-02-04T21:30:23Z

Cygwin should be fully working again now, and it's checked on every commit on AppVeyor:
https://ci.appveyor.com/project/nickg72247/nvc

hiyuh changed the title ~~STD library srachis broken?~~ STD library search is broken? Mar 16, 2016

hiyuh changed the title ~~STD library search is broken?~~ SIGSEGV on cygwin Mar 17, 2016

hiyuh mentioned this issue Jun 8, 2016

Use correct NVC_CYG_LIB. #290

Merged

nickg mentioned this issue Jan 12, 2017

dlopen() not available in MinGW #306

Closed

hiyuh mentioned this issue Apr 5, 2017

std.textio.write for time is broken on Cygwin #317

Closed

nickg added the windows label May 5, 2017

nickg closed this as completed Feb 4, 2018

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SIGSEGV on cygwin #283

SIGSEGV on cygwin #283

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SIGSEGV on cygwin #283

SIGSEGV on cygwin #283

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