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Tests/Kernel: Fix test after off-by-one fix in Memory::is_user_range()

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Commit 890c647e0f fixed an off-by-one bug, so the mapping of the page
at the very end of the user address space now works correctly.

This change adjusts the test so cover the corner cases the original
version was designed too.validate.
This commit is contained in:
Brian Gianforcaro 2021-09-10 20:00:53 -07:00 committed by Brian Gianforcaro
parent 890c647e0f
commit a4efaa7b47
Notes: sideshowbarker 2024-07-18 04:18:32 +09:00 
Author: https://github.com/bgianfo
Commit: https://github.com/SerenityOS/serenity/commit/a4efaa7b47d
Pull-request: https://github.com/SerenityOS/serenity/pull/9951
1 changed files with 3 additions and 8 deletions
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11
Tests/Kernel/TestEFault.cpp
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@ -85,15 +85,10 @@ TEST_CASE(test_efault)
// Test the page just below where the user VM ends.
jerk_page = (u8*)mmap((void*)(user_range_ceiling - PAGE_SIZE), PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
EXPECT_EQ(jerk_page, MAP_FAILED);
EXPECT_EQ(errno, EFAULT);
EXPECT_EQ(jerk_page, (u8*)(user_range_ceiling - PAGE_SIZE));
// Test the page just before that
jerk_page = (u8*)mmap((void*)(user_range_ceiling - (2 * PAGE_SIZE)), PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
EXPECT_EQ(jerk_page, (u8*)(user_range_ceiling - (2 * PAGE_SIZE)));
EXPECT_OK(read, jerk_page, 4096);
EXPECT_EFAULT(read, jerk_page, 4097);
EXPECT_OK(read, jerk_page, PAGE_SIZE);
EXPECT_EFAULT(read, jerk_page, PAGE_SIZE + 1);
// Test something that would wrap around the 2^32 mark.
EXPECT_EFAULT(read, jerk_page, 0x50000000);