HP SunSoft Pascal 4.0 Instrukcja Użytkownika Pobierz pdf (Strona 63)

The Pascal Compiler 39

–p and –pg

The –p and –pg options instruct the compiler to produce code that counts the

number of times each routine is called. The proﬁling is based on a periodic

sample taken by the system, rather than by line counters.

Using the -p Option

To generate an execution proﬁle using the –p option:

1. Compile with the –p option.

2. Run a.out, which produces a mon.out executable ﬁle.

3. Type prof a.out. The program prints a proﬁle.

Using the -pg Option

To generate an execution proﬁle using the –pg option:

1. Compile with the –pg option.

2. Run a.out, which produces a gmon.out executable ﬁle, a more

sophisticated proﬁling tool than mon.out.

3. Type gprof a.out. The program prints a proﬁle.

–pic,-Kpic and –PIC, -KPIC

The -pic and -PIC options cause the compiler to generate position-

independent code (PIC). One of these options should be used for objects

which are then put into shared libraries. With PIC, each reference to a global

datum is generated as a dereference of a pointer in the global offset table. Each

function call is generated in pc-relative addressing mode through a procedure

linkage table.

The size of the global offset table is limited to 8Kbytes with -pic. The -PIC

option expands the global offset table to handle 32-bit addresses for those rare

cases where there are too many data objects for -pic.

For more information on PIC, see the section on shared libraries in the Solaris

documentation.

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HP SunSoft Pascal 4.0 Instrukcja Użytkownika Strona 63