Security Delegation
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Compiling Multithreaded Application
There are some new preprocessing directives that has been introduced to compile with latest Pthread implementation. _POSIX_SOURCE: This needs to be used when compiling any DCE application. It is not necessary when compiling threads only application. _MPE_THREADS: This is used when compiling any DCE or multithreaded application. This directive is used set the thread specific errno. Applications should ensure that they link /lib/libpthread.sl before /lib/libc.sl to ensure that they invoke the thread-safe versions of these C runtime. Applications should not use the c89 linking feature directly since it bind the C routines to /lib/libc.a before /lib/libpthread.sl. Also since we are binding to /lib/libc.sl, we need to explicitly link the program object file(s) with the loader "start" routine. The following makefile will provide an example of the linking process.
DEBUG = -g
INCENV = -I. -I/usr/include
ANSI_FLAGS = -D_POSIX_SOURCE -D_POSIX_D10_THREADS
MPE_FLAGS = -D_MPEXL_SOURCE -D_MPE_THREADS -DMPEXL
CFLAGS = ${ANSI_FLAGS} ${DEBUG} ${MPE_FLAGS} ${INCENV}
#LIBS = -lsocket -lsvipc -lm
XL = /lib/libdce.sl, /lib/libpthread.sl, /lib/libc.sl
PROGRAMS = server client
server_OFILES = manager.o server.o sleeper_sstub.o
client_OFILES = sleeper_cstub.o client.o
IDLFLAGS = -keep c_source ${INCENV}
IDLFILES = sleeper.idl
IDLGEN = sleeper.h sleeper_*stub.c
IDL = /SYS/HPBIN/SH /usr/bin/idl
#IDL = /SYS/PUB/IDL
all: objects ${PROGRAMS}
objects: ${server_OFILES} ${client_OFILES}
fresh: clean all
clean:
@-rm $(IDLGEN) $(server_OFILES) $(client_OFILES) $(PROGRAMS)
server: ${server_OFILES}
ar -rc server.obj ${server_OFILES}
callci linkedit \" 'link from=/SYS/PUB/STARTO,\
/Speedware/sleeper/server.obj;\
to=/Speedware/sleeper/server;xl=${XL};posix;share'\"
client: ${client_OFILES}
ar -rc client.obj ${client_OFILES}
callci linkedit \" 'link from=/SYS/PUB/STARTO,\
/Speedware/sleeper/client.obj;\
to=/Speedware/sleeper/client;xl=${XL};posix;share'\"
sleeper.h: ${IDLFILES}
$(IDL) ${IDLFLAGS} ${IDLFILES}
sleeper_cstub.o sleeper_sstub.o manager.o server.o\
client.o: sleeper.h
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Serviceability Improvements |
Chapter 5 Programming with Kernel Threads |