------- Comment #1 from rob1weld at aol dot com 2007-06-12 11:24 ------- These bug were first mentioned in report: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31681
Confirmed for similar target: Results for 4.3.0 20070611 (experimental) testsuite on i686-pc-linux-gnu http://gcc.gnu.org/ml/gcc-testresults/2007-06/msg00573.html --- My Notes --- Screen output: === libmudflap tests === Schedule of variations: unix Running target unix Using /usr/share/dejagnu/baseboards/unix.exp as board description file for target. Using /usr/share/dejagnu/config/unix.exp as generic interface file for target. Using /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/config/default.exp as tool-and-target-specific interface file. Running /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/libmudflap.c/cfrags.exp ... Running /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/libmudflap.c/externs.exp ... Running /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/libmudflap.c++/c++frags.exp ... FAIL: libmudflap.c++/pass41-frag.cxx execution test FAIL: libmudflap.c++/pass41-frag.cxx (-static) execution test FAIL: libmudflap.c++/pass41-frag.cxx ( -O) execution test FAIL: libmudflap.c++/pass41-frag.cxx (-O2) execution test FAIL: libmudflap.c++/pass41-frag.cxx (-O3) execution test Running /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/libmudflap.c++/ctors.exp ... Running /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/libmudflap.cth/cthfrags.exp ... === libmudflap Summary === # of expected passes 1985 # of unexpected failures 5 Log file "i686-pc-linux-gnu/libmudflap/testsuite/libmudflap.log" output: mudflap violation 1 (check/read): time=1181641131.727908 ptr=0x401fd640 size=4 pc=0x40027c0d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ostream:546 (main)' /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__mf_check+0x3d) [0x40027c0d] ./pass41-frag.exe(main+0x2bb) [0x8048f7b] /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__wrap_main+0x4f) [0x4002745f] number of nearby objects: 0 FAIL: libmudflap.c++/pass41-frag.cxx execution test mudflap violation 1 (check/read): time=1181641140.406737 ptr=0x80fb280 size=4 pc=0x804b3d0 location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ostream:546 (main)' [0x804b3d0] [0x804851b] [0x804b416] number of nearby objects: 0 FAIL: libmudflap.c++/pass41-frag.cxx (-static) execution test mudflap violation 1 (check/read): time=1181641147.350329 ptr=0x401fd640 size=4 pc=0x40027c0d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ostream:546 (main)' /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__mf_check+0x3d) [0x40027c0d] ./pass41-frag.exe(main+0x1b1) [0x8048e65] /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__wrap_main+0x4f) [0x4002745f] number of nearby objects: 0 FAIL: libmudflap.c++/pass41-frag.cxx ( -O) execution test mudflap violation 1 (check/read): time=1181641153.350016 ptr=0x401fd640 size=4 pc=0x40027c0d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ostream:546 (main)' /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__mf_check+0x3d) [0x40027c0d] ./pass41-frag.exe(main+0x2bb) [0x8048f7b] /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__wrap_main+0x4f) [0x4002745f] number of nearby objects: 0 FAIL: libmudflap.c++/pass41-frag.cxx (-O2) execution test mudflap violation 1 (check/read): time=1181641160.020512 ptr=0x401fd640 size=4 pc=0x40027c0d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ostream:546 (main)' /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__mf_check+0x3d) [0x40027c0d] ./pass41-frag.exe(main+0x2bb) [0x8049f7b] /opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs/libmudflap.so.0(__wrap_main+0x4f) [0x4002745f] number of nearby objects: 0 FAIL: libmudflap.c++/pass41-frag.cxx (-O3) execution test All the log entries show "number of nearby objects: 0". Does this mean that it is not the test itself that is failing but instead something other than the test - IE: GXX is compiling incorrect code or the libraries are incorrectly written. # cat /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/libmudflap.c++/pass41-frag.cxx #include <string> #include <iostream> int main (int argc, char *argv[]) { std::string myStr = "Hello, World!"; std::cout << myStr << std::endl; return 0; } /opt/gcc-4_3-build/./gcc/g++ -shared-libgcc -B/opt/gcc-4_3-build/./gcc -nostdinc++ -L/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/src -L/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/src/.libs -B/usr/test/i686-pc-linux-gnu/bin/ -B/usr/test/i686-pc-linux-gnu/lib/ -isystem /usr/test/i686-pc-linux-gnu/include -isystem /usr/test/i686-pc-linux-gnu/sys-include -ffloat-store -mfpmath=sse -march=athlon-xp -msse2 -ggdb3 -DDEBUG_ASSERT -g -O2 -D_GLIBCXX_ASSERT -ffunction-sections -fdata-sections -fmessage-length=0 -g -O2 -ffloat-store -mfpmath=sse -march=athlon-xp -msse2 -D_GNU_SOURCE -I/root/downloads/gcc-4_3-trunk/libmudflap/testsuite -I/root/downloads/gcc-4_3-trunk/libmudflap/testsuite/.. -I.. -nostdinc++ -I/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/i686-pc-linux-gnu -I/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include -I/root/downloads/gcc-4_3-trunk/libstdc++-v3/libsupc++ -I/root/downloads/gcc-4_3-trunk/libstdc++-v3/include/backward -I/root/downloads/gcc-4_3-trunk/libstdc++-v3/testsuite/util -L/opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/.libs /root/downloads/gcc-4_3-trunk/libmudflap/testsuite/libmudflap.c++/pass41-frag.cxx -O3 -fmudflap -lmudflap -L/opt/gcc-4_3-build/i686-pc-linux-gnu/./libmudflap/testsuite -ldl -lm -o ./pass41-frag.exe This turns off the cause of libmudflap's error: # export MUDFLAP_OPTIONS="-ignore-reads" # ./pass41-frag.exe Hello, World! Normal libmudflap operation (doesn't seem to show much wrong): # export -n MUDFLAP_OPTIONS # ./pass41-frag.exe ******* mudflap violation 1 (check/read): time=1181640311.137456 ptr=0xb7dd5740 size=4 pc=0xb7deb11d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ostream:546 (main)' /usr/lib/gcc/4.2.0/libmudflap.so.0(__mf_check+0x3d) [0xb7deb11d] ./pass41-frag.exe(main+0x2bb) [0x8049eeb] /usr/lib/gcc/4.2.0/libmudflap.so.0(__wrap_main+0x49) [0xb7deabf9] number of nearby objects: 0 Hello, World! Show what is set or reset in libmudflap: # export MUDFLAP_OPTIONS="-help" # ./pass41-frag.exe This is a single-threaded thread-unaware GCC "mudflap" memory-checked binary. Mudflap is Copyright (C) 2002-2004 Free Software Foundation, Inc. The mudflap code can be controlled by an environment variable: $ export MUDFLAP_OPTIONS='<options>' $ <mudflapped_program> where <options> is a space-separated list of any of the following options. Use `-no-OPTION' to disable options. -mode-nop mudflaps do nothing -mode-populate mudflaps populate object tree -mode-check mudflaps check for memory violations [active] -mode-violate mudflaps always cause violations (diagnostic) -viol-nop violations do not change program execution [active] -viol-abort violations cause a call to abort() -viol-segv violations are promoted to SIGSEGV signals -viol-gdb violations fork a gdb process attached to current program -trace-calls trace calls to mudflap runtime library -verbose-trace trace internal events within mudflap runtime library -collect-stats collect statistics on mudflap's operation -sigusr1-report print report upon SIGUSR1 -internal-checking perform more expensive internal checking -print-leaks print any memory leaks at program shutdown -check-initialization detect uninitialized object reads -verbose-violations print verbose messages when memory violations occur [active] -abbreviate abbreviate repetitive listings [active] -timestamps track object lifetime timestamps [active] -ignore-reads ignore read accesses - assume okay -wipe-stack wipe stack objects at unwind -wipe-heap wipe heap objects at free -heur-proc-map support /proc/self/map heuristics -heur-stack-bound enable a simple upper stack bound heuristic -heur-start-end support _start.._end heuristics -heur-stdlib register standard library data (argv, errno, stdin, ...) [active] -free-queue-length=N queue N deferred free() calls before performing them [4] -persistent-count=N keep a history of N unregistered regions [100] -crumple-zone=N surround allocations with crumple zones of N bytes [32] -lc-adapt=N adapt mask/shift parameters after N cache misses [1000003] -backtrace=N keep an N-level stack trace of each call context [4] Modified libmudflap operation (seems to show much more problems): # export MUDFLAP_OPTIONS="-check-initialization" # ./pass41-frag.exe ******* mudflap violation 1 (check/read): time=1181642670.810917 ptr=0x80ce238 size=4 pc=0xb7ee011d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:609 (main)' /usr/lib/gcc/4.2.0/libmudflap.so.0(__mf_check+0x3d) [0xb7ee011d] ./pass41-frag.exe(main+0x3d5) [0x804a005] /usr/lib/gcc/4.2.0/libmudflap.so.0(__wrap_main+0x49) [0xb7edfbf9] Nearby object 1: checked region begins 0B into and ends 3B into mudflap object 0x80ce278: name=`malloc region' bounds=[0x80ce238,0x80ce251] size=26 area=heap check=1r/0w liveness=1 alloc time=1181642670.810782 pc=0xb7edfb9d /usr/lib/gcc/4.2.0/libmudflap.so.0(__mf_register+0x3d) [0xb7edfb9d] /usr/lib/gcc/4.2.0/libmudflap.so.0(__real_malloc+0xde) [0xb7ee105e] /usr/lib/gcc/4.2.0/libstdc++.so.6(_Znwj+0x29) [0xb7e9feb9] /usr/lib/gcc/4.2.0/libstdc++.so.6(_ZNSs4_Rep9_S_createEjjRKSaIcE+0x35) [0xb7e7cec5] Nearby object 2: checked region begins 3727B after and ends 3730B after mudflap dead object 0x80cd3f0: name=`malloc region' bounds=[0x80cd3a8,0x80cd3a9] size=2 area=heap check=0r/0w liveness=0 alloc time=1181642670.809614 pc=0xb7edfb9d /usr/lib/gcc/4.2.0/libmudflap.so.0(__mf_register+0x3d) [0xb7edfb9d] /usr/lib/gcc/4.2.0/libmudflap.so.0(__real_malloc+0xde) [0xb7ee105e] /lib/libc.so.6(__strdup+0x30) [0xb7ce4740] /usr/lib/gcc/4.2.0/libstdc++.so.6(_ZNSt5ctypeIcEC1EPKtbj+0x77) [0xb7e36a47] dealloc time=1181642670.809891 pc=0xb7edfb46 /usr/lib/gcc/4.2.0/libmudflap.so.0(__mf_unregister+0x36) [0xb7edfb46] /usr/lib/gcc/4.2.0/libmudflap.so.0(__real_free+0x88) [0xb7ee0918] /usr/lib/gcc/4.2.0/libstdc++.so.6(_ZNSt5ctypeIcEC1EPKtbj+0xc9) [0xb7e36a99] /usr/lib/gcc/4.2.0/libstdc++.so.6(_ZNSt6locale5_ImplC1Ej+0xc8) [0xb7e3e198] number of nearby objects: 2 ******* mudflap violation 2 (check/read): time=1181642670.812129 ptr=0xb7eca740 size=4 pc=0xb7ee011d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ostream:546 (main)' /usr/lib/gcc/4.2.0/libmudflap.so.0(__mf_check+0x3d) [0xb7ee011d] ./pass41-frag.exe(main+0x2bb) [0x8049eeb] /usr/lib/gcc/4.2.0/libmudflap.so.0(__wrap_main+0x49) [0xb7edfbf9] number of nearby objects: 0 Hello, World! ******* mudflap violation 3 (check/read): time=1181642670.812286 ptr=0x80ce238 size=12 pc=0xb7ee011d location=`/opt/gcc-4_3-build/i686-pc-linux-gnu/libstdc++-v3/include/ext/atomicity.h:69 (main)' /usr/lib/gcc/4.2.0/libmudflap.so.0(__mf_check+0x3d) [0xb7ee011d] ./pass41-frag.exe(main+0x319) [0x8049f49] /usr/lib/gcc/4.2.0/libmudflap.so.0(__wrap_main+0x49) [0xb7edfbf9] Nearby object 1: checked region begins 0B into and ends 11B into mudflap object 0x80ce278: name=`malloc region' Nearby object 2: checked region begins 3727B after and ends 3738B after mudflap dead object 0x80cd3f0: name=`malloc region' number of nearby objects: 2 The errors don't seem to come from "pass41-frag.cxx", the errors seem to come from: libstdc++-v3/include/bits/basic_string.h:609 libstdc++-v3/include/ostream:546 libstdc++-v3/include/ext/atomicity.h:69 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32276
