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From: "jengelh at inai dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/58283] New: Incorrect debug info when precompilation is on Date: Fri, 30 Aug 2013 16:02:00 -0000 [thread overview] Message-ID: <bug-58283-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58283 Bug ID: 58283 Summary: Incorrect debug info when precompilation is on Product: gcc Version: 4.8.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: jengelh at inai dot de Created attachment 30731 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30731&action=edit testcase $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/4.7/lto-wrapper Target: x86_64-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.7 --enable-ssp --disable-libssp --disable-libitm --disable-plugin --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --enable-linker-build-id --program-suffix=-4.7 --enable-linux-futex --without-system-libunwind --with-arch-32=i586 --with-tune=generic --build=x86_64-suse-linux Thread model: posix gcc version 4.7.2 20130108 [gcc-4_7-branch revision 195012] (SUSE Linux) GNU ld (GNU Binutils; openSUSE 12.3) 2.23.1 Testcase is appended. What I observe with it: $ make gcc-4.8 -gdwarf-2 -g3 -O0 -DPRECOMP -o pc1.h.gch -c pc1.h gcc-4.8 -gdwarf-2 -g3 -O0 -DPRECOMP -o x m.c nm -C x | grep main U __libc_start_main 0000000000400560 T main addr2line -e x $(nm -C x | grep ' main$' | awk '{print $1}') /usr/include/stdio.h:947 What I would have expected: Have addr2line return m.c:3. Additional information: I do get addr2line to output "m.c:3" if I include "pc1.h" instead of "pc.h" from m.c. So this problem seems to be related with headers including (precompiled) headers. In fact, gcc-4.7.2 even ignored pc1.h.gch (itself a bug, or a non-implemented feature) if m.c includes pc.h, which means I don't get wrong line numbers on gcc-4.7. The outputting of wrong line numbers also occurs if compiled as C++ code.
next reply other threads:[~2013-08-30 16:02 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-08-30 16:02 jengelh at inai dot de [this message] 2013-09-02 11:17 ` [Bug c/58283] " rguenth at gcc dot gnu.org 2013-09-02 11:46 ` jengelh at inai dot de 2013-09-02 12:42 ` jengelh at inai dot de 2013-09-02 12:51 ` rguenth at gcc dot gnu.org 2013-09-02 19:54 ` jengelh at inai dot de
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