[lldb-dev] [Bug 26031] New: Ptrace interface unable to set byte select watchpoints on arm-linux

[via lldb-dev]

https://llvm.org/bugs/show_bug.cgi?id=26031

            Bug ID: 26031
           Summary: Ptrace interface unable to set byte select watchpoints
                    on arm-linux
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: omair.javaid at linaro.org
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Following tests fail on arm-linux:

TestWatchLocationWithWatchSet.py
TestStepOverWatchpoint.py

Ptrace interface fails to set read/write watchpoints on single byte variables
which are not word aligned.

Following commands fail, in case of TestStepOverWatchpoint:

watchpoint set variable -w read g_watch_me_write

Following commands fail, in case of TestWatchLocationWithWatchSet:

watchpoint set expression -w write -s 1 -- g_char_ptr + 7


Need to do further investigation on how to make sure we can select individual
bytes while setting watchpoints on arm.

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