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Adds test for memory max_exec_size #1524

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Sep 17, 2019
Merged

Adds test for memory max_exec_size #1524

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22 changes: 22 additions & 0 deletions tests/native/test_memory.py
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Original file line number Diff line number Diff line change
Expand Up @@ -273,6 +273,28 @@ def test_access_symbolic_w(self):
mem[sym] = "\x40"
mem[sym] = val

def test_max_exec_size(self):
mem = Memory32()
# start with no maps
self.assertEqual(len(mem.mappings()), 0)

# alloc/map a byte
notExecMap = mem.mmap(0x1000, 0x1000, "rw")
isExecMap = mem.mmap(0x2000, 0x1000, "x")
anotherExecMap = mem.mmap(0x3000, 0x1000, "rwx")
# Okay 2 maps
self.assertEqual(len(mem.mappings()), 3)

# 0 size when not executable at all
self.assertEqual(mem.max_exec_size(notExecMap - 1, 16), 0)
self.assertEqual(mem.max_exec_size(notExecMap, 16), 0)
# maximum size when executable
self.assertEqual(mem.max_exec_size(isExecMap, 16), 16)
# maximum size when executable across maps
self.assertEqual(mem.max_exec_size(isExecMap + 0x1000 - 12, 16), 16)
# restricted size when executable until boundary
self.assertEqual(mem.max_exec_size(anotherExecMap + 0x1000 - 12, 16), 12)

def test_access(self):
mem = Memory32()

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