Date: Wed, 26 Feb 2014 20:40:01 GMT From: Don Lewis <truckman@FreeBSD.org> To: gecko@FreeBSD.org Subject: Re: ports/186541: installing www/libxul fails Message-ID: <201402262040.s1QKe1H3078066@freefall.freebsd.org>
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The following reply was made to PR ports/186541; it has been noted by GNATS.
From: Don Lewis <truckman@FreeBSD.org>
To: bug-followup@FreeBSD.org
Cc: turutani@scphys.kyoto-u.ac.jp
Subject: Re: ports/186541: installing www/libxul fails
Date: Wed, 26 Feb 2014 12:34:40 -0800 (PST)
I did a bunch of single stepping in gdb and found this:
0x8965ade0 in mozilla::services::_external_GetHistoryService ()
from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/dist/bin//libxul.so
(gdb)
0x8965ade1 in mozilla::services::_external_GetHistoryService ()
from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/dist/bin//libxul.so
(gdb)
0x8965ade2 in mozilla::services::_external_GetHistoryService ()
from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/dist/bin//libxul.so
(gdb)
0x8833308d in XRE_GetBinaryPath ()
from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/dist/bin//libxul.so
(gdb)
Program received signal SIGILL, Illegal instruction.
0x8833308d in XRE_GetBinaryPath ()
from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/dist/bin//libxul.so
(gdb)
If I disassemble the offending bit of code, I see this:
0x88333083 <XRE_GetBinaryPath+195>: mov %ecx,(%eax)
0x88333085 <XRE_GetBinaryPath+197>: mov (%ecx),%eax
0x88333087 <XRE_GetBinaryPath+199>: mov %ecx,(%esp)
0x8833308a <XRE_GetBinaryPath+202>: call *0x4(%eax)
0x8833308d <XRE_GetBinaryPath+205>: ud2a
0x8833308f <XRE_GetBinaryPath+207>: nop
0x88333090 <XRE_GetBinaryPath+208>: push %ebp
0x88333091 <XRE_GetBinaryPath+209>: mov %esp,%ebp
0x88333093 <XRE_GetBinaryPath+211>: push %ebx
A bit of searching with google, turned up this page:
<http://peeterjoot.wordpress.com/2010/05/26/a-fun-and-curious-dig-gcc-generation-of-a-ud2a-instruction-sigill/>;
The ud2a instruction is guaranteed invalid, hence the SIGILL. Apparently
gcc will sometimes insert these on purpose if it sees some code that it
doesn't like, but I'm compiling with clang.
I do see a lot of complaints from clang when compiling the offending
file:
# /usr/bin/clang++ -o nsAppRunner.o -c -fvisibility=hidden -DUSE_GLX_TEST -DMOZ_APP_NAME='"firefox"' -DMOZ_APP_VERSION='"27.0.1"' -DOS_POSIX=1 -DOS_FREEBSD=1 -DOS_BSD=1 -DMOZ_GLUE_IN_PROGRAM -DMOZILLA_INTERNAL_API -DIMPL_LIBXUL -DSTATIC_EXPORTABLE_JS_API -DNO_NSPR_10_SUPPORT -DOS_TARGET=\"FreeBSD\" -DMOZ_WIDGET_TOOLKIT=\"gtk2\" -DTARGET_XPCOM_ABI=\"x86-gcc3\" -DTARGET_OS_ABI=\"FreeBSD_x86-gcc3\" -DTOOLKIT_EM_VERSION=\"27.0.1\" -DGRE_MILESTONE=27.0.1 -DGRE_BUILDID=20140225233802 -DAPP_VERSION=27.0.1 -DAPP_I D="{ec8030f7-c20a-464f-9b0e-13a3a9e97384}" -I../../../widget/xremoteclient -I../../../ipc/chromium/src -I../../../ipc/glue -I/usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders -I../../../testing/gtest/mozilla -I../../../toolkit/xre/../profile -I../../../dom/ipc -I../../../toolkit/crashreporter -I../../../dom/base -I../../../xpcom/build -I../../../config -I../../../toolkit/xre -I. -I../../dist/include -I/usr/local/include/nspr -I/u!
sr/local/include/nss -I/usr/local/include/nss/nss -I/usr/local/include -I/usr/local/include -fPIC -Qunused-arguments -isystem/usr/local/include -DLIBICONV_PLUG -I/usr/local/include -DMOZILLA_CLIENT -include ../../mozilla-config.h -MD -MP -MF .deps/nsAppRunner.o.pp -Qunused-arguments -isystem/usr/local/include -DLIBICONV_PLUG -I/usr/local/include -Qunused-arguments -Wall -Wpointer-arith -Woverloaded-virtual -Werror=return-type -Wtype-limits -Wempty-body -Wsign-compare -Wno-invalid-offsetof -Wno-c++0x-exten sions -Wno-extended-offsetof -Wno-unknown-warning-option -Wno-return-type-c-linkage -Wno-mismatched-tags -O2 -pipe -march=athlon64 -DLIBICONV_PLUG -fno-strict-aliasing -DLIBICONV_PLUG -fno-exceptions -fno-strict-aliasing -fno-rtti -ffunction-sections -fdata-sections -fno-exceptions -fno-math-errno -std=gnu++0x -pipe -DNDEBUG -DTRIMMED -fno-omit-frame-pointer -I../../../widget/gtk/compat -I/usr/local/include/gtk-unix-print-2.0 -I/usr/local/include/atk-1.0 -I/usr/local/includ!
e/harfbuzz -I/usr/local/include/gtk-2.0 -I/usr/local/include/pango-1.0
-I/usr/local/include/gio-unix-2.0/ -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/cairo -I/usr/local/include/glib-2.0 -I/usr/local/include/pixman-1 -I/usr/local/include/freetype2 -I/usr/local/include/libpng15 -D_THREAD_SAFE -I/usr/local/include -I/usr/local/include/dbus-1.0 -I/usr/local/include/dbus-1.0/include -I/usr/local/include/dbus-1.0 -I/usr/local/include/dbus-1.0/include -I/usr/local/include/glib-2.0 -I/usr/local/include -I/usr/local/include/harfbuzz -I/usr/local/include/pango-1. 0 -pthread -I/usr/local/include/cairo -I/usr/local/include/glib-2.0 -I/usr/local/include/pixman-1 -I/usr/local/include/freetype2 -I/usr/local/include/libpng15 -D_THREAD_SAFE -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:198:21: warning: replacement function
'operator new' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:204:21: warning: replacement function
'operator new' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:210:21: warning: replacement function
'operator new[]' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:216:21: warning: replacement function
'operator new[]' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:222:21: warning: replacement function
'operator delete' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:228:21: warning: replacement function
'operator delete' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:234:21: warning: replacement function
'operator delete[]' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:21:
In file included from ../../dist/include/mozilla/dom/ContentParent.h:10:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContentParent.h:9:
In file included from /usr/ports/www/firefox/work/mozilla-release/obj-i386-portbld-freebsd11.0/ipc/ipdl/_ipdlheaders/mozilla/dom/PContent.h:12:
In file included from ../../dist/include/ipc/IPCMessageUtils.h:10:
In file included from ../../../ipc/chromium/src/base/process_util.h:11:
In file included from ../../../ipc/chromium/src/base/basictypes.h:252:
In file included from ../../dist/include/nscore.h:19:
../../dist/include/mozilla/mozalloc.h:240:21: warning: replacement function
'operator delete[]' cannot be declared 'inline' [-Winline-new-delete]
MOZALLOC_EXPORT_NEW MOZALLOC_INLINE
^
../../dist/include/mozilla/mozalloc.h:44:27: note: expanded from macro
'MOZALLOC_INLINE'
# define MOZALLOC_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
^
../../dist/include/mozilla/Attributes.h:27:75: note: expanded from macro
'MOZ_ALWAYS_INLINE_EVEN_DEBUG'
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:233:
In file included from /usr/local/include/gtk-2.0/gtk/gtk.h:33:
In file included from /usr/local/include/gtk-2.0/gtk/gtkaboutdialog.h:32:
In file included from ../../../widget/gtk/compat/gtk/gtkdialog.h:4:
In file included from /usr/local/include/gtk-2.0/gtk/gtkdialog.h:35:
In file included from ../../../widget/gtk/compat/gtk/gtkwindow.h:9:
In file included from /usr/local/include/gtk-2.0/gtk/gtkwindow.h:36:
In file included from /usr/local/include/gtk-2.0/gtk/gtkbin.h:35:
In file included from /usr/local/include/gtk-2.0/gtk/gtkcontainer.h:35:
In file included from ../../../widget/gtk/compat/gtk/gtkwidget.h:12:
In file included from /usr/local/include/gtk-2.0/gtk/gtkwidget.h:40:
In file included from /usr/local/include/atk-1.0/atk/atk.h:53:
/usr/local/include/atk-1.0/atk/atkversion.h:39:9: warning: 'ATK_MAJOR_VERSION'
macro redefined
#define ATK_MAJOR_VERSION (2)
^
../../mozilla-config.h:10:9: note: previous definition is here
#define ATK_MAJOR_VERSION 2
^
In file included from /usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:233:
In file included from /usr/local/include/gtk-2.0/gtk/gtk.h:33:
In file included from /usr/local/include/gtk-2.0/gtk/gtkaboutdialog.h:32:
In file included from ../../../widget/gtk/compat/gtk/gtkdialog.h:4:
In file included from /usr/local/include/gtk-2.0/gtk/gtkdialog.h:35:
In file included from ../../../widget/gtk/compat/gtk/gtkwindow.h:9:
In file included from /usr/local/include/gtk-2.0/gtk/gtkwindow.h:36:
In file included from /usr/local/include/gtk-2.0/gtk/gtkbin.h:35:
In file included from /usr/local/include/gtk-2.0/gtk/gtkcontainer.h:35:
In file included from ../../../widget/gtk/compat/gtk/gtkwidget.h:12:
In file included from /usr/local/include/gtk-2.0/gtk/gtkwidget.h:40:
In file included from /usr/local/include/atk-1.0/atk/atk.h:53:
/usr/local/include/atk-1.0/atk/atkversion.h:50:9: warning: 'ATK_MINOR_VERSION'
macro redefined
#define ATK_MINOR_VERSION (8)
^
../../mozilla-config.h:11:9: note: previous definition is here
#define ATK_MINOR_VERSION 8
^
/usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:4017:3: warning:
'g_slice_set_config' is deprecated [-Wdeprecated-declarations]
g_slice_set_config(G_SLICE_CONFIG_ALWAYS_MALLOC, 1);
^
/usr/local/include/glib-2.0/glib/gslice.h:87:10: note: 'g_slice_set_config'
declared here
void g_slice_set_config (GSliceConfig ckey, gint64 value);
^
/usr/ports/www/firefox/work/mozilla-release/toolkit/xre/nsAppRunner.cpp:4019:3: warning:
'g_thread_init' is deprecated [-Wdeprecated-declarations]
g_thread_init(nullptr);
^
/usr/local/include/glib-2.0/glib/deprecated/gthread.h:261:10: note:
'g_thread_init' declared here
void g_thread_init (gpointer vtable);
^
12 warnings generated.
If I compile the file to assembler, this is what I see for
XRE_GetBinaryPath():
.section .text.XRE_GetBinaryPath,"ax",@progbits
.globl XRE_GetBinaryPath
.align 16, 0x90
.type XRE_GetBinaryPath,@function
XRE_GetBinaryPath: # @XRE_GetBinaryPath
# BB#0: # %entry
pushl %ebp
movl %esp, %ebp
pushl %ebx
subl $8, %esp
calll .L50$pb
.L50$pb:
popl %ebx
.Ltmp92:
addl $_GLOBAL_OFFSET_TABLE_+(.Ltmp92-.L50$pb), %ebx
movl 8(%ebp), %eax
movl 12(%ebp), %ecx
movl %ecx, 4(%esp)
movl %eax, (%esp)
calll _ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile
.Ltmp93:
.size XRE_GetBinaryPath, .Ltmp93-XRE_GetBinaryPath
.section .text._ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile,"axG",@progbits,_ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile,comdat
.hidden _ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile
.weak _ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile
.align 16, 0x90
.type _ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile,@function
_ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile: # @_ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile
# BB#0: # %entry
pushl %ebp
movl %esp, %ebp
pushl %ebx
pushl %edi
pushl %esi
andl $-8, %esp
subl $1064, %esp # imm = 0x428
calll .L51$pb
.L51$pb:
popl %ebx
.Ltmp94:
addl $_GLOBAL_OFFSET_TABLE_+(.Ltmp94-.L51$pb), %ebx
movl 8(%ebp), %eax
movl $0, 1056(%esp)
leal 32(%esp), %esi
movl %esi, 4(%esp)
movl %eax, (%esp)
calll _ZN7mozilla10BinaryPath3GetEPKcPc
testl %eax, %eax
js .LBB51_3
# BB#1: # %if.end
movl %esi, (%esp)
calll strlen@PLT
movl %esi, 16(%esp)
movl %eax, 20(%esp)
movl $1, 24(%esp)
leal 1056(%esp), %eax
calll _ZN13nsCOMPtr_base16begin_assignmentEv@PLT
movl %eax, 8(%esp)
leal 16(%esp), %esi
movl %esi, (%esp)
movl $1, 4(%esp)
calll NS_NewNativeLocalFile@PLT
movl %eax, %edi
movl %esi, %eax
calll _ZN19nsACString_internal8FinalizeEv@PLT
testl %edi, %edi
js .LBB51_3
# BB#2: # %if.end16
movl 12(%ebp), %eax
movl 1056(%esp), %ecx
movl %ecx, (%eax)
movl (%ecx), %eax
movl %ecx, (%esp)
calll *4(%eax)
.LBB51_3: # %cleanup
ud2
.Ltmp95:
.size _ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile, .Ltmp95-_ZN7mozilla10BinaryPath7GetFileEPKcPP7nsIFile
And sure enough, the function ends with a ud2 instruction! It's not the
only one in this file, either. So if this a compiler bug, why isn't
everyone seeing it?
I don't see the ud2 instructions when I compile with gcc, so my problem
looks like it is different that the original one in this PR, so I'm
going to open a PR to report my problem as a clang bug.
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