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sync usertests

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This commit is contained in:
Robert Morris 2021-07-02 14:24:45 -04:00
parent 1841baa3dd
commit 08c9eda85f
1 changed files with 11 additions and 0 deletions
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11
user/usertests.c
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@ -2591,6 +2591,16 @@ sbrklast(char *s)
exit(1); exit(1);
} }
// does sbrk handle signed int32 wrap-around with
// negative arguments?
void
sbrk8000(char *s)
{
sbrk(0x80000004);
volatile char *top = sbrk(0);
*(top-1) = *(top-1) + 1;
}
// regression test. does write() with an invalid buffer pointer cause // regression test. does write() with an invalid buffer pointer cause
// a block to be allocated for a file that is then not freed when the // a block to be allocated for a file that is then not freed when the
// file is deleted? if the kernel has this bug, it will panic: balloc: // file is deleted? if the kernel has this bug, it will panic: balloc:
@ -2832,6 +2842,7 @@ main(int argc, char *argv[])
{sbrkfail, "sbrkfail"}, {sbrkfail, "sbrkfail"},
{sbrkarg, "sbrkarg"}, {sbrkarg, "sbrkarg"},
{sbrklast, "sbrklast"}, {sbrklast, "sbrklast"},
{sbrk8000, "sbrk8000"},
{validatetest, "validatetest"}, {validatetest, "validatetest"},
{stacktest, "stacktest"}, {stacktest, "stacktest"},
{opentest, "opentest"}, {opentest, "opentest"},