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[lldb] [test] Skip watchpoint tests on NetBSD if userdbregs is disabled

Skip watchpoint tests if security.models.extensions.user_set_dbregs
is disabled.  This indicates that unprivileged processes are not allowed
to write to debug registers which is a prerequisite for using hardware
watchpoints.

Differential Revision: https://reviews.llvm.org/D63380

llvm-svn: 363536
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mgorny committed Jun 17, 2019
1 parent 4bde5d3 commit 43cf5ae48a0c823d40d78e24cafce4ef6dfa76a9
Showing with 25 additions and 0 deletions.
  1. +25 −0 lldb/packages/Python/lldbsuite/test/dotest.py
@@ -1181,6 +1181,30 @@ def checkLibstdcxxSupport():
print("libstdcxx tests will not be run because: " + reason)
configuration.skipCategories.append("libstdcxx")

def canRunWatchpointTests():
from lldbsuite.test import lldbplatformutil

platform = lldbplatformutil.getPlatform()
if platform == "netbsd":
try:
output = subprocess.check_output(["/sbin/sysctl", "-n",
"security.models.extensions.user_set_dbregs"]).decode().strip()
if output == "1":
return True, "security.models.extensions.user_set_dbregs enabled"
except subprocess.CalledProcessError:
pass
return False, "security.models.extensions.user_set_dbregs disabled"
return True, "watchpoint support available"

def checkWatchpointSupport():
result, reason = canRunWatchpointTests()
if result:
return # watchpoints supported
if "watchpoint" in configuration.categoriesList:
return # watchpoint category explicitly requested, let it run.
print("watchpoint tests will not be run because: " + reason)
configuration.skipCategories.append("watchpoint")

def checkDebugInfoSupport():
import lldb

@@ -1305,6 +1329,7 @@ def run_suite():

checkLibcxxSupport()
checkLibstdcxxSupport()
checkWatchpointSupport()
checkDebugInfoSupport()

# Don't do debugserver tests on anything except OS X.

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