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| author | Robert Morris <[email protected]> | 2020-08-07 05:32:48 -0400 |
|---|---|---|
| committer | Frans Kaashoek <[email protected]> | 2020-08-10 11:19:10 -0400 |
| commit | 7f35d7a14efe56905d340a0e318f01c7c514320d (patch) | |
| tree | bc1203ec6dc250f6f9671d9881329e5ab22a069a /user | |
| parent | 2ae9c8e2722282d9a619c1745d845fb5d862c518 (diff) | |
| download | xv6-labs-7f35d7a14efe56905d340a0e318f01c7c514320d.tar.gz xv6-labs-7f35d7a14efe56905d340a0e318f01c7c514320d.tar.bz2 xv6-labs-7f35d7a14efe56905d340a0e318f01c7c514320d.zip | |
modify each page in usertests countfree()
get rid of static for walk() and freewalk()
Diffstat (limited to 'user')
| -rw-r--r-- | user/usertests.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/user/usertests.c b/user/usertests.c index f83a060..aefbc9f 100644 --- a/user/usertests.c +++ b/user/usertests.c @@ -2251,9 +2251,12 @@ countfree() int n = 0; while(1){ - if((uint64)sbrk(4096) == 0xffffffffffffffff){ + uint64 a = (uint64) sbrk(4096); + if(a == 0xffffffffffffffff){ break; } + // modify the memory to make sure it's really allocated. + *(char *)(a - 1) = 1; n += 1; } sbrk(-((uint64)sbrk(0) - sz0)); |