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

[Oliver]

One more comment, the env address looks wrong going all the way up the
stack

#0  0x0000000100436b71 in gen_intermediate_code_internal (env=0x102064680, 
tb=0x108e5b070, search_pc=1) at translate.c:9793
#1  0x0000000100437776 in gen_intermediate_code_pc (env=0x102064680, 
tb=0x108e5b070) at translate.c:9961
#2  0x000000010044539f in cpu_restore_state (tb=0x108e5b070, env=0x102064680, 
searched_pc=4410683708) at translate-all.c:126
#3  0x00000001003ed7b3 in tlb_fill (env1=0x102064680, addr=17328, is_write=0, 
mmu_idx=0, retaddr=4410683708) at op_helper.c:93
#4  0x00000001003ec14d in __ldl_mmu (addr=17328, mmu_idx=0) at 
softmmu_template.h:159
#5  0x0000000106e5b13d in ?? ()

Olvier

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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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