f77 bug
The f77 compiler seems to have a BUG what makes - for me - it impossible to use seriously I have a lot of very big old f77 progs, what I want to revise, and put open. f77 DONT PRODUCE A COMPILING LIST FILE, i.e. listing the source-code with line number and errors/warnings after each line ! At least, since months im searching this possibility. Old-time compilers had this option, f.ex. compile with #f77 -l or something like this I need this urgently. Without this, I cannot compile/adapt/make error-free these progs Pls. put in a new option, that f77 makes such a list at compiling time !!! w.landgraf [EMAIL PROTECTED]
[Bug c/56098] New: conditional write through volatile pointer produces unintended read
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56098
Bug #: 56098
Summary: conditional write through volatile pointer produces
unintended read
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: wer...@almesberger.net
If compiled with -O2 or greater and without -fno-strict-aliasing, the following
code
volatile int *ptr;
void problem(int flag)
{
*ptr = 1;
if (flag)
*ptr = 2;
}
produces an unintended read, as if the "if" statement had continued with
else
*ptr = *ptr;
Code generated by gcc 4.7.2 on Ubuntu on x86-64 when invoked with
gcc-4.7 -Wall -Wextra -O2 -S bug.c
...
problem:
.LFB0:
.cfi_startproc
movqptr(%rip), %rax
testl %edi, %edi
movl$2, %edx
movl$1, (%rax)
jne .L2
movl(%rax), %edx<<< unexpected
.L2:
movl%edx, (%rax)
ret
.cfi_endproc
...
This happens with
- gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3 for x86-64,
- gcc-4.7 (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2 for x86-64,
- mipsel-openwrt-linux-gcc (Linaro GCC 4.6-2012.02) 4.6.3 20120201 (prerelease)
for MIPS,
and I've had someone confirm it for an ARM target (without further details) as
well.
-Os instead of -O2 has the same effect. The unintended read disappears if
optimizing with -O1 or less, or with -fno-strict-aliasing.
This bears a striking resemblance to Bug 15456 and maybe Bug 5395, except that
these were for C++ while this is plain C.
[Bug middle-end/56098] [4.6/4.7 Regression] conditional write through volatile pointer produces unintended read
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56098
--- Comment #6 from werner at almesberger dot net 2013-01-25 22:46:17 UTC ---
Thanks for the analysis and the fixes ! I'll try them soonish.
Regarding work-arounds, the ones I mentioned for my original code snippet
(i.e., -O1 or -fno-strict-aliasing) aren't sufficient in the following more
general case:
volatile void *p;
#define P (*(volatile int *) (p+8))
void foo(int x)
{
P = 1;
if (x)
P = 2;
}
This is for gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2 on x86-64. The offset (8)
may be architecture-specific. For values < 8, correct code is generated with
-O1 (but not -O2 or higher).
The good news is that -fno-tree-cselim does indeed avoid the bad read in all
cases I've tried, with any optimization level.
[Bug middle-end/56098] [4.6/4.7 Regression] conditional write through volatile pointer produces unintended read
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56098 --- Comment #7 from werner at almesberger dot net 2013-01-26 02:09:33 UTC --- I'm happy to confirm that trunk (for x86-64) now passes all variations of this theme I tried with flying colors. Thanks again !
[Bug c++/67571] New: Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 Bug ID: 67571 Summary: Error: open CFI at the end of file; missing .cfi_endproc directive Product: gcc Version: 4.9.2 Status: UNCONFIRMED Severity: major Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: werner at beroux dot com Target Milestone: --- gcc (Debian 4.9.2-10) 4.9.2 Steps: 1. Install Docker 2. Retrieve `Dockerfile`: `$ wget https://raw.githubusercontent.com/wernight/docker-phantomjs/master/Dockerfile` 3. Get latest Debian: `$ docker pull debian:jessie` 3. Run `$ docker build -t phantomjs .` Log end: ``` g++ -c -Wall -Wextra -Wreturn-type -fno-strict-aliasing -Wchar-subscripts -Wformat-security -Wreturn-type -Wno-unused-parameter -Wno-sign-compare -Wno-switch -Wno-switch-enum -Wundef -Wmissing-noreturn -Winit-self -pipe -ffunction-sections -fdata-sections -O2 -fPIC -fvisibility=hidden -fvisibility-inlines-hidden -std=c++0x -fno-exceptions -D_REENTRANT -DQT_NO_MTDEV -DQT_NO_LIBUDEV -DQT_NO_EVDEV -DQT_NO_GRAPHICSVIEW -DQT_NO_GRAPHICSEFFECT -DQT_NO_STYLESHEET -DQT_NO_STYLE_CDE -DQT_NO_STYLE_CLEANLOOKS -DQT_NO_STYLE_MOTIF -DQT_NO_STYLE_PLASTIQUE -DSQLITE_CORE -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_COMPLETE -DBUILDING_QT__=1 -DNDEBUG -DENABLE_3D_RENDERING=1 -DENABLE_BLOB=1 -DENABLE_CANVAS_PATH=1 -DENABLE_CHANNEL_MESSAGING=1 -DENABLE_CSS_BOX_DECORATION_BREAK=1 -DENABLE_CSS_COMPOSITING=1 -DENABLE_CSS_EXCLUSIONS=1 -DENABLE_CSS_FILTERS=1 -DENABLE_CSS_IMAGE_SET=1 -DENABLE_CSS_REGIONS=1 -DENABLE_CSS_SHAPES=1 -DENABLE_CSS_STICKY_POSITION=1 -DENABLE_CSS_TRANSFORMS_ANIMATIONS_UNPREFIXED=1 -DENABLE_DATALIST_ELEMENT=1 -DENABLE_DETAILS_ELEMENT=1 -DENABLE_DOWNLOAD_ATTRIBUTE=1 -DENABLE_FAST_MOBILE_SCROLLING=1 -DENABLE_FILTERS=1 -DENABLE_FTPDIR=1 -DENABLE_FULLSCREEN_API=1 -DENABLE_GESTURE_EVENTS=1 -DENABLE_ICONDATABASE=1 -DENABLE_IFRAME_SEAMLESS=1 -DENABLE_INDEXED_DATABASE=1 -DENABLE_INPUT_TYPE_COLOR=1 -DENABLE_INSPECTOR=1 -DENABLE_INSPECTOR_SERVER=1 -DENABLE_JAVASCRIPT_DEBUGGER=1 -DENABLE_LEGACY_NOTIFICATIONS=1 -DENABLE_LEGACY_VIEWPORT_ADAPTION=1 -DENABLE_LEGACY_VENDOR_PREFIXES=1 -DENABLE_LINK_PREFETCH=1 -DENABLE_METER_ELEMENT=1 -DENABLE_MHTML=1 -DENABLE_NOTIFICATIONS=1 -DENABLE_PAGE_VISIBILITY_API=1 -DENABLE_PROGRESS_ELEMENT=1 -DENABLE_RESOLUTION_MEDIA_QUERY=1 -DENABLE_REQUEST_ANIMATION_FRAME=1 -DENABLE_SHARED_WORKERS=1 -DENABLE_SMOOTH_SCROLLING=1 -DENABLE_SQL_DATABASE=1 -DENABLE_SUBPIXEL_LAYOUT=1 -DENABLE_SVG=1 -DENABLE_SVG_FONTS=1 -DENABLE_TOUCH_ADJUSTMENT=1 -DENABLE_TOUCH_EVENTS=1 -DENABLE_VIEW_MODE_CSS_MEDIA=1 -DENABLE_WEB_SOCKETS=1 -DENABLE_WEB_TIMING=1 -DENABLE_WORKERS=1 -DENABLE_XHR_TIMEOUT=1 -DWTF_USE_TILED_BACKING_STORE=1 -DWTF_USE_CROSS_PLATFORM_CONTEXT_MENUS=1 -DHAVE_QTPRINTSUPPORT=1 -DHAVE_QSTYLE=1 -DWTF_USE_LIBJPEG=1 -DWTF_USE_LIBPNG=1 -DPLUGIN_ARCHITECTURE_UNSUPPORTED=1 -DENABLE_TOUCH_SLIDER=1 -DWTF_USE_LEVELDB=1 -DHAVE_QTTESTSUPPORT=1 -DENABLE_ACCELERATED_2D_CANVAS=0 -DENABLE_BATTERY_STATUS=0 -DENABLE_CANVAS_PROXY=0 -DENABLE_CSP_NEXT=0 -DENABLE_CSS_GRID_LAYOUT=0 -DENABLE_CSS_HIERARCHIES=0 -DENABLE_CSS_IMAGE_ORIENTATION=0 -DENABLE_CSS_IMAGE_RESOLUTION=0 -DENABLE_CSS_SHADERS=0 -DENABLE_CSS_VARIABLES=0 -DENABLE_CSS3_CONDITIONAL_RULES=0 -DENABLE_CSS3_TEXT=0 -DENABLE_CSS3_TEXT_LINE_BREAK=0 -DENABLE_DASHBOARD_SUPPORT=0 -DENABLE_DATAGRID=0 -DENABLE_DATA_TRANSFER_ITEMS=0 -DENABLE_DEVICE_ORIENTATION=0 -DENABLE_DIRECTORY_UPLOAD=0 -DENABLE_FILE_SYSTEM=0 -DENABLE_FONT_LOAD_EVENTS=0 -DENABLE_GAMEPAD=0 -DENABLE_GEOLOCATION=0 -DENABLE_HIGH_DPI_CANVAS=0 -DENABLE_INPUT_SPEECH=0 -DENABLE_INPUT_TYPE_DATE=0 -DENABLE_INPUT_TYPE_DATETIME_INCOMPLETE=0 -DENABLE_INPUT_TYPE_DATETIMELOCAL=0 -DENABLE_INPUT_TYPE_MONTH=0 -DENABLE_INPUT_TYPE_TIME=0 -DENABLE_INPUT_TYPE_WEEK=0 -DENABLE_LEGACY_CSS_VENDOR_PREFIXES=0 -DENABLE_LEGACY_WEB_AUDIO=0 -DENABLE_MATHML=0 -DENABLE_MEDIA_SOURCE=0 -DENABLE_MEDIA_STATISTICS=0 -DENABLE_MEDIA_STREAM=0 -DENABLE_MICRODATA=0 -DENABLE_MOUSE_CURSOR_SCALE=0 -DENABLE_NAVIGATOR_CONTENT_UTILS=0 -DENABLE_NETSCAPE_PLUGIN_API=0 -DENABLE_NETWORK_INFO=0 -DENABLE_NOSNIFF=0 -DENABLE_ORIENTATION_EVENTS=0 -DENABLE_PROXIMITY_EVENTS=0 -DENABLE_QUOTA=0 -DENABLE_RESOURCE_TIMING=0 -DENABLE_SCRIPTED_SPEECH=0 -DENABLE_SECCOMP_FILTERS=0 -DENABLE_SHADOW_DOM=0 -DENABLE_STYLE_SCOPED=0 -DENABLE_TEMPLATE_ELEMENT=0 -DENABLE_TEXT_AUTOSIZING=0 -DENABLE_THREADED_HTML_PARSER=0 -DENABLE_TOUCH_ICON_LOADING=0 -DENABLE_USER_TIMING=0 -DENABLE_VIBRATION=0 -DENABLE_VIDEO=0 -DENABLE_VIDEO_TRACK=0 -DENABLE_WEBGL=0 -DENABLE_WEB_AUDIO=0 -DENABLE_XSLT=0 -DSTATICALLY_LINKED_WITH_leveldb -DSTATICALLY_LINKED_WITH_JavaScriptCore -DSTATICALLY_LINKED_WITH_WTF -DBUILDING_WebCore -DBUILDING_WEBKIT -DQT_ASCII_CAST_WARNINGS -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_SQL_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/tmp/phantomjs/src/qt/qtbase/mkspecs/linux-g++ -I. -I. -IModules/filesystem -IModules
[Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 --- Comment #2 from werner at beroux dot com --- It worked on gcc (Debian 4.9.2-2). Also I tried on two machines with pretty different spec. I'm not excluding the memory issue, just saying it used to work on those two machines and now it doesn't.
[Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 --- Comment #3 from werner at beroux dot com --- I should clarify that the code being compiled might have changed as well between the two: https://github.com/ariya/phantomjs/commits/master from 2015-06-25T20:16:02.750261Z (working) to 2015-09-05T08:36:46.296402Z (started breaking) and 2015-09-14T07:32:46.758499Z (still breaking)
[Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 --- Comment #5 from werner at beroux dot com --- I'm trying to build with newer GCC and older code to confirm that (build takes a while).
[Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 --- Comment #6 from werner at beroux dot com --- Humm no sorry I'm building from the same git tag (which is of Jan 24). So it looks like something caused GCC to use more memory than before. I did notice a GCC5 compilation fix, probably unrelated, just in case it here: https://github.com/ariya/phantomjs/commit/fe2c6bb5fdf776b718422a104e6babe67dbf2629
[Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 --- Comment #8 from werner at beroux dot com --- Tried to build the exact same just on newer gcc and nothing else should have changed, and it failed. I'll try to build on older gcc as well.
[Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 --- Comment #9 from werner at beroux dot com --- (In reply to Markus Trippelsdorf from comment #7) > Can you please attach the preprocessed JSBindingsAllInOne.ii file (by > adding -save-temps to the compiler invocation)? I added that flag (at least I think it worked) but I find any file of that name below /tmp/phantomjs (my build directory). Do you know where it's supposed to be generated at?
[Bug c++/67571] Error: open CFI at the end of file; missing .cfi_endproc directive
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67571 --- Comment #11 from werner at beroux dot com --- (In reply to Markus Trippelsdorf from comment #10) > (In reply to werner from comment #9) > > (In reply to Markus Trippelsdorf from comment #7) > > > Can you please attach the preprocessed JSBindingsAllInOne.ii file (by > > > adding -save-temps to the compiler invocation)? > > > > I added that flag (at least I think it worked) but I find any file of that > > name below /tmp/phantomjs (my build directory). Do you know where it's > > supposed to be generated at? > > In the directory from which you've invoked gcc. > > So in your case: > cd /tmp/phantomjs/src/qt/qtwebkit/Source/WebCore > g++ --save-temps -c -Wall -Wextra -Wreturn-type ... (from comment 0) > > You'll find JSBindingsAllInOne.ii in > /tmp/phantomjs/src/qt/qtwebkit/Source/WebCore It's odd, I get another error with -save-temps (correctly passed this time): > g++: warning: -pipe ignored because -save-temps specified > In file included from :0:0: > /usr/include/stdc-predef.h:59:1: error: one or more PCH files were found, but > they were invalid > #endif > ^ > /usr/include/stdc-predef.h:59:1: error: use -Winvalid-pch for more information > /usr/include/stdc-predef.h:59:1: fatal error: .pch/Qt5Core: No such file or > directory > compilation terminated. > Makefile:18187: recipe for target '.obj/harfbuzz-shaper-all.o' failed > make[2]: *** [.obj/harfbuzz-shaper-all.o] Error 1 > make[2]: *** Waiting for unfinished jobs > In file included from :0:0: > /usr/include/stdc-predef.h:59:1: error: one or more PCH files were found, but > they were invalid > #endif > ^ > /usr/include/stdc-predef.h:59:1: error: use -Winvalid-pch for more information > /usr/include/stdc-predef.h:59:1: fatal error: .pch/Qt5Core: No such file or > directory > compilation terminated. > Makefile:18301: recipe for target '.obj/qharfbuzz.o' failed > make[2]: *** [.obj/qharfbuzz.o] Error 1 > In file included from ../3rdparty/pcre/pcre16_exec.c:43:0: > ../3rdparty/pcre/pcre_exec.c: In function 'match': > ../3rdparty/pcre/pcre_exec.c:2703:35: warning: 'offset' may be used > uninitialized in this function [-Wmaybe-uninitialized] > length = md->offset_vector[offset+1] - md->offset_vector[offset]; >^ > In file included from ../3rdparty/pcre/pcre16_compile.c:43:0: > ../3rdparty/pcre/pcre_compile.c: In function 'compile_regex': > ../3rdparty/pcre/pcre_compile.c:6748:31: warning: 'name' may be used > uninitialized in this function [-Wmaybe-uninitialized] > if (!IS_DIGIT(name[i])) >^ > ../3rdparty/pcre/pcre_compile.c:6511:25: note: 'name' was declared here >const pcre_uchar *name; > ^ > ../3rdparty/pcre/pcre_compile.c:6509:26: warning: 'namelen' may be used > uninitialized in this function [-Wmaybe-uninitialized] >int i, set, unset, namelen; > ^ > ../3rdparty/pcre/pcre_compile.c:6680:26: warning: 'recno' may be used > uninitialized in this function [-Wmaybe-uninitialized] > cd->bracount - recno + 1 : recno + cd->bracount; > ^ > ../3rdparty/pcre/pcre_compile.c:4453:7: note: 'recno' was declared here >int recno; >^ > make[2]: Leaving directory '/tmp/phantomjs/src/qt/qtbase/src/corelib' > Makefile:130: recipe for target 'sub-corelib-make_first' failed > make[1]: *** [sub-corelib-make_first] Error 2 > make[1]: Leaving directory '/tmp/phantomjs/src/qt/qtbase/src' > Makefile:39: recipe for target 'sub-src-make_first' failed > make: *** [sub-src-make_first] Error 2
[Bug c++/28677] New: Function prototype in function body crashes compilation
[EMAIL PROTECTED]:~$ gcc -v
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr
--enable-shared --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --enable-nls
--program-suffix=-4.1 --enable-__cxa_atexit --enable-clocale=gnu
--enable-libstdcxx-debug --enable-mpfr --with-tune=i686
--enable-checking=release i486-linux-gnu
Thread model: posix
gcc version 4.1.2 20060729 (prerelease) (Debian 4.1.1-10)
I currently use the latest Debian unstable system.
[EMAIL PROTECTED] g++ -O3 -g crasher.cpp
crasher.cpp: In function 'float betai(float, float, float)':
crasher.cpp:43: internal compiler error: in add_AT_specification, at
dwarf2out.c:5048
Please submit a full bug report,
with preprocessed source if appropriate.
See http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see .
Preprocessed source stored into /tmp/ccH8vLQj.out file, please attach this to
your bugreport.
the preprocessed source will be attached.
--
Summary: Function prototype in function body crashes compilation
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: werner dot van dot belle at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28677
[Bug c++/28677] Function prototype in function body crashes compilation
--- Comment #1 from werner dot van dot belle at gmail dot com 2006-08-10 12:20 --- Created an attachment (id=12057) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12057&action=view) The preprocessed source -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28677
[Bug c++/28677] Function prototype in function body crashes compilation
--- Comment #2 from werner dot van dot belle at gmail dot com 2006-08-10 12:25 --- The bug does not occur without the -g option. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28677
