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Move some utility functions to linker_utils

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Also adds unit-tests for page_start, page_offset, and safe_add

Change-Id: Ia1325b4682d367328a01599a19848e4ffcd2c0ea
This commit is contained in:
Dmitriy Ivanov
2015-11-20 13:34:11 -08:00
committed by Dimitry Ivanov
parent a1ab0d8ed1
commit 84bab5a955
4 changed files with 46 additions and 20 deletions
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21
linker/tests/linker_utils_test.cpp
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@@ -69,3 +69,24 @@ TEST(linker_utils, parse_zip_path_smoke) {
ASSERT_EQ("", entry_path);
}
TEST(linker_utils, page_start) {
ASSERT_EQ(0x0001000, page_start(0x0001000));
ASSERT_EQ(0x3002000, page_start(0x300222f));
ASSERT_EQ(0x6001000, page_start(0x6001fff));
}
TEST(linker_utils, page_offset) {
ASSERT_EQ(0x0U, page_offset(0x0001000));
ASSERT_EQ(0x22fU, page_offset(0x300222f));
ASSERT_EQ(0xfffU, page_offset(0x6001fff));
}
TEST(linker_utils, safe_add) {
int64_t val = 42;
ASSERT_FALSE(safe_add(&val, INT64_MAX-20, 21U));
ASSERT_EQ(42, val);
ASSERT_TRUE(safe_add(&val, INT64_MAX-42, 42U));
ASSERT_EQ(INT64_MAX, val);
ASSERT_TRUE(safe_add(&val, 2000, 42U));
ASSERT_EQ(2042, val);
}