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Add more debug messages to the lldb QtCore debug_script.py

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So that it's easier to troubleshoot why a certain bridge might not be
loaded.

To enable verbose debug messages, set the
QT_LLDB_SUMMARY_PROVIDER_DEBUG environment variable to 1 when
launching Qt Creator or lldb.

The informational message to set the env var is also shown if no
bridge was loaded successfully.

Task-number: QTCREATORBUG-31769
Change-Id: I53e7b26950fdd635e51d0458cb5fb90600b158a2
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit 8b01ea5261fdb97c949dc4b3d9a4ea902858bd08)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Alexandru Croitor 2024-10-08 19:02:01 +02:00 committed by Qt Cherry-pick Bot
parent 34a41d83d8
commit 2469cb7a12
1 changed files with 19 additions and 1 deletions
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20
src/corelib/debug_script.py
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@ -9,15 +9,20 @@ from distutils.version import LooseVersion
MODULE_NAME = 'qt'
debug = print if 'QT_LLDB_SUMMARY_PROVIDER_DEBUG' in os.environ \
else lambda *a, **k: None
def import_bridge(path, debugger, session_dict, reload_module=False):
if not reload_module and MODULE_NAME in sys.modules:
del sys.modules[MODULE_NAME]
if sys.version_info[0] >= 3:
sys.path.append(os.path.dirname(path))
debug(f"Loading source of Qt Creator bridge from '{path}'")
bridge = imp.load_source(MODULE_NAME, path)
if not hasattr(bridge, '__lldb_init_module'):
print("Could not find '__lldb_init_module'. Ignoring.")
return None
# Make available for the current LLDB session, so that LLDB
@ -25,13 +30,16 @@ def import_bridge(path, debugger, session_dict, reload_module=False):
session_dict[MODULE_NAME] = bridge
# Initialize the module now that it's available globally
debug(f"Initializing Qt Creator bridge by calling __lldb_init_module(): {bridge}")
bridge.__lldb_init_module(debugger, session_dict)
if not debugger.GetCategory('Qt'):
debug("Could not find Qt debugger category. Qt Creator summary providers not loaded.")
# Summary provider failed for some reason
del session_dict[MODULE_NAME]
return None
debug("Bridge loaded successfully")
return bridge
def __lldb_init_module(debugger, session_dict):
@ -40,11 +48,15 @@ def __lldb_init_module(debugger, session_dict):
# LLDB process invocation, while still reloading for each session.
if MODULE_NAME in sys.modules:
module = sys.modules[MODULE_NAME]
debug(f"Module '{module.__file__}' already imported. Reloading for this session.")
# Reload module for this sessions
bridge = import_bridge(module.__file__, debugger, session_dict,
reload_module = True)
if bridge:
debug("Qt summary providers successfully reloaded.")
return
else:
print("Bridge reload failed. Trying to find other Qt Creator bridges.")
versions = {}
for path in os.popen('mdfind kMDItemCFBundleIdentifier=org.qt-project.qtcreator'):
@ -72,8 +84,14 @@ def __lldb_init_module(debugger, session_dict):
for version in sorted(versions, key=LooseVersion, reverse=True):
path = versions[version]
print(f"Loading Qt summary providers from Creator {version} in '{path}'")
debug(f"Loading Qt summary providers from Creator Qt {version} in '{path}'")
bridge_path = '{}/Contents/Resources/debugger/lldbbridge.py'.format(path)
bridge = import_bridge(bridge_path, debugger, session_dict)
if bridge:
debug(f"Qt summary providers successfully loaded.")
return
if 'QT_LLDB_SUMMARY_PROVIDER_DEBUG' not in os.environ:
print("Could not find any valid Qt Creator bridges with summary providers. "
"Launch lldb or Qt Creator with the QT_LLDB_SUMMARY_PROVIDER_DEBUG environment "
"variable to debug.")