GDB, the GNU Project debugger, allows you to see what is going on `inside' another program while it executes -- or what another program was doing at the moment it crashed.
testsuite/ ChangeLog Makefile.am Makefile.in arm-lcd-demo.conf.in hd-5X10.conf hd-5X10.cxx hd-5X10.h hd-europe.conf hd-europe.cxx hd-europe.h hd-one-line.conf hd-one-line.cxx hd-one-line.h hd-tester.cxx hd-tester.h hd-two-line.conf hd-two-line.cxx hd-two-line.h lcd-ex.c lcdcontroller.tk simplcddemo.conf.in t6963c-japan.conf t6963c-japan.cxx t6963c-japan.h t6963c-tcl.conf t6963c-tester.cxx t6963c-tester.h ChangeLog HD44780U.cxx HD44780U.h Makefile.am Makefile.in T6963C.cxx T6963C.h hw-lcd-char-display.txt hw-lcd-char-display.xml hw-lcd-hd44780u.txt hw-lcd-hd44780u.xml hw-lcd-t6963c.txt hw-lcd-t6963c.xml hw-visual-lcd.tk hw-visual-lcd.txt hw-visual-lcd.xml lcd-char-display.cxx rom-5X10.cxx rom-europe.cxx rom-japan.cxx rom-t6963c.cxx rom.cxx