diff options
| -rw-r--r-- | vespalib/src/tests/alloc/alloc_test.cpp | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/vespalib/src/tests/alloc/alloc_test.cpp b/vespalib/src/tests/alloc/alloc_test.cpp index 03d600c6559..a533197ef91 100644 --- a/vespalib/src/tests/alloc/alloc_test.cpp +++ b/vespalib/src/tests/alloc/alloc_test.cpp @@ -116,7 +116,7 @@ TEST("mmap alloc can be extended if room") { Alloc buf = Alloc::allocMMap(100); // Normally mmapping starts at the top and grows down in address space. - // The there is no room to extend the last mapping. + // Then there is no room to extend the last mapping. // So in order to verify this we first mmap a reserved area that we unmap // before we test extension. EXPECT_GREATER(reserved.get(), buf.get()); @@ -132,6 +132,24 @@ TEST("mmap alloc can be extended if room") { EXPECT_EQUAL(8192, buf.size()); } +TEST("mmap alloc can not be extended if no room") { + Alloc reserved = Alloc::allocMMap(100); + Alloc buf = Alloc::allocMMap(100); + + // Normally mmapping starts at the top and grows down in address space. + // Then there is no room to extend the last mapping. + // So in order to verify this we first mmap a reserved area that we unmap + // before we test extension. + EXPECT_GREATER(reserved.get(), buf.get()); + EXPECT_EQUAL(reserved.get(), static_cast<const char *>(buf.get()) + buf.size()); + + void * oldPtr = buf.get(); + EXPECT_EQUAL(4096, buf.size()); + EXPECT_FALSE(buf.resize_inplace(4097)); + EXPECT_EQUAL(oldPtr, buf.get()); + EXPECT_EQUAL(4096, buf.size()); +} + TEST("heap alloc can not be shrinked") { Alloc buf = Alloc::allocHeap(101); void * oldPtr = buf.get(); |