Running mpatrol on the qt embedded demonstration program, qtdemoE on qemux86 causes a SIGSEGV fault every time on the same memory access after two or three minutes. The fault ends mpatrol but the results that print show that more than a hundred thousand symbols have been loaded. Additional testing revealed that the failure always (meaning 20 out of 20 times) occurs in the context of a constructor in qbuiltintypes.cpp:139, while adding a new string to the mpatrol string table that has been added to the callstack, and in code that needs to increase the size of the string table hash table. The failure never occurs if mpatrol is run with the -N option that disables using mprotect() system call to make the mpatrol data structures READONLY in order to protect the internal structures from applications that are writing to the wrong parts of memory.
wrlinux/configure --enable-board=qemux86 --enable-build=debug --enable-jobs=8 --enable-kernel=standard --enable-rootfs=glibc-small --enable-parallel-pkgbuilds=8 --with-package=qt4-embedded make fs TARGET_QEMU_MEM=2048 make start-target TOPTS="-gc -t" <login> mpatrol --threads --check-all --timestamp --use-debug --log-all \ --log-file=stdout --dynamic NOTE SIGSEGV report
