[llvm] r174543 - Add a test for checking the current .debug_frame dumping capability.

[David Tweed]

Further to Renato's comments:

 

While I don't know either about ELF or how llvm-dwarfdump reads it, I
observe that if I run the failing test multiple times the hex numbers

 

00000014 00000010 beaebe7f FDE cie=00000000 pc=00000000...beaebe7f

 

in the beaebe7f positions change between runs seemingly randomly (although
they all start "be") (and a few other elements of such as the Data alignment
factor and Return address column contain garbage), suggesting that it _may_
be something is being allocated on when run on ARM but not being filled in.
But that diagnosis isn't certain obviously. (Unfortunately I can't currently
run valgind on my pandaboard to check this directly.)

 

Cheers,

Dave

 

From: llvm-commits-bounces at cs.uiuc.edu
[mailto:llvm-commits-bounces at cs.uiuc.edu] On Behalf Of Renato Golin
Sent: 07 February 2013 10:39
To: Eli Bendersky
Cc: LLVM Commits
Subject: Re: [llvm] r174543 - Add a test for checking the current
.debug_frame dumping capability.

 

Hi Eli,

 

This test is not working on ARM buildbots...

 

http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a15/builds/16/step
s/check-all/logs/LLVM%20%3A%3A%20DebugInfo__dwarfdump-debug-frame-simple.tes
t

 

http://lab.llvm.org:8011/builders/clang-native-arm-cortex-a9/builds/4861/ste
ps/check-all/logs/LLVM%20%3A%3A%20DebugInfo__dwarfdump-debug-frame-simple.te
st

 

thanks,

--renato

 

On 6 February 2013 20:55, Eli Bendersky <eliben at google.com> wrote:

Author: eliben
Date: Wed Feb  6 14:55:06 2013
New Revision: 174543

URL: http://llvm.org/viewvc/llvm-project?rev=174543
<http://llvm.org/viewvc/llvm-project?rev=174543&view=rev> &view=rev
Log:
Add a test for checking the current .debug_frame dumping capability.

The test is a binary placed in test/DebugInfo/Inputs, with a source C
file used for reference/reproducing. The source's first line is a clang
build command for reproducing the binary.


Added:
    llvm/trunk/test/DebugInfo/Inputs/dwarfdump-test-32bit.elf.c
    llvm/trunk/test/DebugInfo/Inputs/dwarfdump-test-32bit.elf.o   (with
props)
    llvm/trunk/test/DebugInfo/dwarfdump-debug-frame-simple.test

Added: llvm/trunk/test/DebugInfo/Inputs/dwarfdump-test-32bit.elf.c
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/Inputs/dwarfdu
mp-test-32bit.elf.c?rev=174543
<http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/Inputs/dwarfd
ump-test-32bit.elf.c?rev=174543&view=auto> &view=auto
============================================================================
==
--- llvm/trunk/test/DebugInfo/Inputs/dwarfdump-test-32bit.elf.c (added)
+++ llvm/trunk/test/DebugInfo/Inputs/dwarfdump-test-32bit.elf.c Wed Feb  6
14:55:06 2013
@@ -0,0 +1,14 @@
+// clang -c -g -o dwarfdump-test-32bit.elf.o -m32
dwarfdump-test-32bit.elf.c
+
+extern int glob;
+
+int foo(int arg) {
+  int a = arg * 2;
+  return a + glob;
+}
+
+int bar(int arg) {
+  int a = foo(arg) * foo(arg * 2);
+  return glob - foo(a);
+}
+

Added: llvm/trunk/test/DebugInfo/Inputs/dwarfdump-test-32bit.elf.o
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/Inputs/dwarfdu
mp-test-32bit.elf.o?rev=174543
<http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/Inputs/dwarfd
ump-test-32bit.elf.o?rev=174543&view=auto> &view=auto
============================================================================
==
Binary file - no diff available.

Propchange: llvm/trunk/test/DebugInfo/Inputs/dwarfdump-test-32bit.elf.o
----------------------------------------------------------------------------
--
    svn:mime-type = application/octet-stream

Added: llvm/trunk/test/DebugInfo/dwarfdump-debug-frame-simple.test
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/dwarfdump-debu
g-frame-simple.test?rev=174543
<http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/dwarfdump-deb
ug-frame-simple.test?rev=174543&view=auto> &view=auto
============================================================================
==
--- llvm/trunk/test/DebugInfo/dwarfdump-debug-frame-simple.test (added)
+++ llvm/trunk/test/DebugInfo/dwarfdump-debug-frame-simple.test Wed Feb  6
14:55:06 2013
@@ -0,0 +1,14 @@
+; RUN: llvm-dwarfdump %p/Inputs/dwarfdump-test-32bit.elf.o
-debug-dump=frames | FileCheck %s -check-prefix FRAMES
+
+; FRAMES: .debug_frame
+; FRAMES-NOT: .eh_frame
+
+; FRAMES: 00000000 00000010 ffffffff CIE
+; FRAMES: Version: 1
+
+; FRAMES: 00000014 00000010 00000000 FDE cie=00000000
pc=00000000...00000022
+; FRAMES: 00000028 00000014 00000000 FDE cie=00000000
pc=00000030...00000080
+
+; FRAMES-NOT: CIE
+; FRAMES-NOT: FDE
+


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