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Tests/Kernel: Make sure inaccessible area in TestEFault is actually that

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We were relying on luck to make the mapping before our first mmap() be
inaccessible. Let's make it explicit.
This commit is contained in:
Andreas Kling 2022-08-24 18:33:15 +02:00
commit c713e76941
Notes: sideshowbarker 2024-07-17 09:47:09 +09:00
1 changed files with 3 additions and 0 deletions
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3
Tests/Kernel/TestEFault.cpp
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@ -41,6 +41,9 @@ TEST_CASE(test_efault)
int fd = open("/dev/zero", O_RDONLY); int fd = open("/dev/zero", O_RDONLY);
int rc = -1; int rc = -1;
// Make an inaccessible hole before the next mapping.
(void)mmap(nullptr, 4096, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
// Test a one-page mapping (4KB) // Test a one-page mapping (4KB)
u8* one_page = (u8*)mmap(nullptr, 4096, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); u8* one_page = (u8*)mmap(nullptr, 4096, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
VERIFY(one_page); VERIFY(one_page);