check memory region permission on breakpoint/watchpoint creation

[andrurogerz]

Purpose

When a Z packet it sent to set a breakpoint or watchpoint, check the access mask for the containing memory region and fail if it doesn't make sense for the requested breakpoint/watchpoint type.

Overview

• For hardware and software breakpoints, fail if the containing memory region is not executable
• For read watchpoints, fail if the containing memory region is not readable
• For write watchpoints, fail if the containing memory region is not writeable
• For access watchpoints, fail if the containing memory region is not either readable or writable.
• Enable the TestBadAddressBreakpoints.BadAddressBreakpointTestCase.test_bad_address_breakpoints lldb test case that was failing because of the missing checks

Validation

GitHub build & test job