jehanne/qa/lib/c/longjmp.c
Giacomo Tesio e70feee4a3 libc: introduce "jehanne_" namespace
With this commit all functions declared in libc.h have been renamed
with the "jehanne_" prefix. This is done for several reason:

- it removes conflicts during symbol resolution when linking
  standard C libraries like newlib or musl
- it allows programs depending on a standard C library to directly
  link to a library depending on our non standard libc (eg libsec).

To ease transiction two files are provided:

- sys/include/lib9.h that can be included instead of <libc.h> to use
  the old names (via a simple set of macros)
- sys/src/lib/c/lib9.c that can be compiled with a program where the
  macro provided by lib9.h are too dumb (see for example rc or grep).

In the kernel port/lib.h has been modified accordingly and some of
the functions it directly provides has been renamed too (eg malloc
in qmalloc.c and print in devcons.c).
2017-04-19 23:48:21 +02:00

49 lines
697 B
C

#include <u.h>
#include <lib9.h>
enum {
Njmps = 10000
};
void foo(void);
void
main(void)
{
int i, njmp;
int fail = 0;
jmp_buf label;
njmp = 0;
while((njmp = setjmp(label)) < Njmps)
longjmp(label, njmp+1);
for(i = 0; i < nelem(label); i++)
fprint(2, "label[%d] = %p\n", i, label[i]);
fprint(2, "main: %p foo: %p\n", main, foo);
if(njmp != Njmps)
fail++;
if(label[JMPBUFPC] < (uintptr_t)main)
fail++;
if(label[JMPBUFPC] > (uintptr_t)foo)
fail++;
if(label[JMPBUFSP] > (uintptr_t)&label[nelem(label)])
fail++;
if(label[JMPBUFSP] < 0x7fffffd00000)
fail++;
if(fail == 0){
print("PASS\n");
exits("PASS");
}
print("FAIL\n");
exits("FAIL");
}
void
foo(void)
{
}