HP aC++/HP C A.06.20 Programmer's Guide

The +check options need to be specified at both compile time and link time, since they
may require additional libraries to be linked into the user program. If different +check
options are specified while compiling different source files, all the specified +check
options are needed at link time.
Multiple +check options are interpreted left to right. In case of conflicting options, the
one on the right will override an earlier +check option.
NOTE: The +check option is only supported on Integrity servers.
+check=all
The +check=all option enables all runtime checks provided by the compiler, except
for +check=truncate, +check=lock, and +check=thread, which must be explicitly
specified to enable them. It overrides any +check=xxx options that appear earlier on
the command line. The +check=all option is currently equivalent to the following
options:
+check=bounds:array +check=globals +check=malloc
+check=stack:variables +check=uninit -z
The -z option, which is part of +check=all, can be overridden by an explicit -Z
option.
+check=none
The +check=none option turns off all runtime checking options. It disables any
+check=xxxoptions that appear earlier on the command line.
+check=bounds
The +check=bounds option enables checks for out-of-bounds references to array
variables or to buffers through pointer access. The check is performed for each reference
to an array element or pointer access. If a check fails, an error message is emitted and
the program is aborted.
The +check=bounds option applies only to local and global array variables. It also
applies to references to array fields of structs. It does not apply to arrays allocated
dynamically using malloc or alloca.
You can specify one of the following +check=bounds suboptions:
• array - Enables check for out-of-bounds references to array variables.
• pointer - Enables check for out-of-bounds references to buffers through pointer
access. The buffer could be a heap object, global variable, or local variable. This
suboption also checks out-of-bounds access through common libc function calls
such as strcpy, strcat, memset, and so on. The check can create significant
run-time performance overhead. See +check=uninit and +check=malloc for
their interaction with this option.
100 Command-Line Options