[Qemu-devel] [Bug 1065232] Re: qemu-system-arm Crashes on startup on OS X 10.8.2

[Oliver]

Peter,

I built in from the zipped tar ball for qemu-1.2.0  I did not get it
from the repository, although I am happy to do this for you.

I used

./configure

This what configure said
Silently falling back into gthread backend under darwin
....
C compiler        gcc
Host C compiler   gcc
Objective-C compiler clang
CFLAGS            -O2 -D_FORTIFY_SOURCE=2 -g 
QEMU_CFLAGS       -m64 -DOS_OBJECT_USE_OBJC=0 -arch x86_64 -D_GNU_SOURCE 
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes 
-Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes 
-fno-strict-aliasing  -fstack-protector-all -Wendif-labels 
-Wmissing-include-dirs -Wempty-body -Wnested-externs -Wformat-security 
-Wformat-y2k -Winit-self -Wold-style-definition -I/opt/local/include/libpng15  
LDFLAGS           -m64 -framework CoreFoundation -framework IOKit -arch x86_64 

My gcc appears to be

localhost:qemu-1.2.0 oliverks$ gcc -v
Using built-in specs.
Target: i686-apple-darwin11
Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-2336.11~28/src/configure 
--disable-checking --enable-werror 
--prefix=/Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2 
--mandir=/share/man --enable-languages=c,objc,c++,obj-c++ 
--program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ 
--with-slibdir=/usr/lib --build=i686-apple-darwin11 
--enable-llvm=/private/var/tmp/llvmgcc42/llvmgcc42-2336.11~28/dst-llvmCore/Developer/usr/local
 --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 
--target=i686-apple-darwin11 --with-gxx-include-dir=/usr/include/c++/4.2.1
Thread model: posix
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)

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https://bugs.launchpad.net/bugs/1065232

Title:
  qemu-system-arm Crashes on startup on OS X 10.8.2

Status in QEMU:
  New

Bug description:
  On startup qemu-system-arm crashes on this line 9373 of target-arm

          if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
              QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
                  if (bp->pc == dc->pc) {  // <-- CRASH !!!!
                      gen_exception_insn(dc, 0, EXCP_DEBUG);
                      /* Advance PC so that clearing the breakpoint will
                         invalidate this TB.  */
                      dc->pc += 2;
                      goto done_generating;
                      break;
                  }
              }

  What appears to be happening is env is 
  (gdb) print env->breakpoints
  $4 = {
    tqh_first = 0x1f001f001f001f, 
    tqh_last = 0x1f001f001f001f
  }

  which leads to bp being set to
  (gdb) print bp
  $1 = (CPUBreakpoint *) 0x1f001f001f001f

  This looks like a bad address and causes the following statement

  Program received signal EXC_BAD_ACCESS, Could not access memory.
  Reason: 13 at address: 0x0000000000000000

  I am wondering if the env structure is not getting setup correctly?

  I am running the 1.2.0 version of qemu on
  Darwin localhost 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 
2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64

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