diff options
| -rw-r--r-- | usertests.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/usertests.c b/usertests.c index 0d5d4dc..3bffadb 100644 --- a/usertests.c +++ b/usertests.c @@ -1238,7 +1238,7 @@ forktest(void) void sbrktest(void) { - int fds[2], pid, pids[32], ppid; + int fds[2], pid, pids[10], ppid; char *a, *b, *c, *lastaddr, *oldbrk, *p, scratch; uint amt; @@ -1310,6 +1310,13 @@ sbrktest(void) exit(); } + a = sbrk(0); + c = sbrk(-(sbrk(0) - oldbrk)); + if(c != a){ + printf(stdout, "sbrk downsize failed, a %x c %x\n", a, c); + exit(); + } + // can we read the kernel's memory? for(a = (char*)(KERNBASE); a < (char*) (KERNBASE+2000000); a += 50000){ ppid = getpid(); @@ -1328,15 +1335,14 @@ sbrktest(void) // if we run the system out of memory, does it clean up the last // failed allocation? - sbrk(-(sbrk(0) - oldbrk)); if(pipe(fds) != 0){ printf(1, "pipe() failed\n"); exit(); } for(i = 0; i < sizeof(pids)/sizeof(pids[0]); i++){ if((pids[i] = fork()) == 0){ - // allocate the full 640K - sbrk((640 * 1024) - (uint)sbrk(0)); + // allocate a lot of memory + sbrk(BIG - (uint)sbrk(0)); write(fds[1], "x", 1); // sit around until killed for(;;) sleep(1000); |