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Update mallocx() OOM test to deal with smaller hugemax.

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Depending on virtual memory resource limits, it is necessary to attempt
allocating three maximally sized objects to trigger OOM rather than just
two, since the maximum supported size is slightly less than half the
total virtual memory address space.

This fixes a test failure that was introduced by
0c516a00c4 (Make *allocx() size class
overflow behavior defined.).

This resolves #379.
This commit is contained in:
Jason Evans 2016-05-03 09:37:54 -07:00
parent 108c4a11e9
commit 9aa1543e9c
1 changed files with 19 additions and 10 deletions
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29
test/integration/mallocx.c
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@ -69,19 +69,28 @@ TEST_END
TEST_BEGIN(test_oom)
{
size_t hugemax;
bool oom;
void *ptrs[3];
unsigned i;
/*
* It should be impossible to allocate two objects that each consume
* more than half the virtual address space.
* It should be impossible to allocate three objects that each consume
* nearly half the virtual address space.
*/
{
size_t hugemax = get_huge_size(get_nhuge()-1);
void *p = mallocx(hugemax, 0);
if (p != NULL) {
assert_ptr_null(mallocx(hugemax, 0),
"Expected OOM for mallocx(size=%#zx, 0)", hugemax);
dallocx(p, 0);
}
hugemax = get_huge_size(get_nhuge()-1);
oom = false;
for (i = 0; i < sizeof(ptrs) / sizeof(void *); i++) {
ptrs[i] = mallocx(hugemax, 0);
if (ptrs[i] == NULL)
oom = true;
}
assert_true(oom,
"Expected OOM during series of calls to mallocx(size=%zu, 0)",
hugemax);
for (i = 0; i < sizeof(ptrs) / sizeof(void *); i++) {
if (ptrs[i] != NULL)
dallocx(ptrs[i], 0);
}
#if LG_SIZEOF_PTR == 3