Options: Debugging

• Option Functionality

• -g Disable optimization and keep all symbol tables

• -DEBUG: the DEBUG group option (man DEBUG_GROUP):

  • check_div=n n=1 (default) check integer divide by zero

• n=2 check integer overflow

• n=3 check integer divide by zero and overflow

  • subscript_check (default ON) to check for subscripts out of range

• C/C++: produces trap #8

• f77: aborts run and dumps core

• f90: aborts run if setenv F90_BOUNDS_CHECK_ABORT

  • verbose_runtime (default OFF) to give source line number of failures
  • trap_uninitialized (default OFF) initialize all variables to 0xFFFA5A5

• when used as pointer - access violation

• when used as fp values - NaN causes fp trap

• Example:

• f77 -n32 -mips4 -g file.f \

• -DEBUG:subscript_check:verbose_runtime=ON \

• -DEBUG:check_div=3 -DEBUG:trap_uninitialized=ON

Previous slide

Next slide

Back to first slide

View graphic version