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"""
Test lldb core component: SourceManager.
Test cases:
o test_display_source_python:
Test display of source using the SBSourceManager API.
o test_modify_source_file_while_debugging:
Test the caching mechanism of the source manager.
"""
from __future__ import print_function
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class SourceManagerTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break inside main().
self.line = line_number('main.c', '// Set break point at this line.')
@add_test_categories(['pyapi'])
def test_display_source_python(self):
"""Test display of source using the SBSourceManager API."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Launch the process, and do not stop at the entry point.
process = target.LaunchSimple (None, None, self.get_process_working_directory())
#
# Exercise Python APIs to display source lines.
#
# Create the filespec for 'main.c'.
filespec = lldb.SBFileSpec('main.c', False)
source_mgr = self.dbg.GetSourceManager()
# Use a string stream as the destination.
stream = lldb.SBStream()
source_mgr.DisplaySourceLinesWithLineNumbers(filespec,
self.line,
2, # context before
2, # context after
"=>", # prefix for current line
stream)
# 2
# 3 int main(int argc, char const *argv[]) {
# => 4 printf("Hello world.\n"); // Set break point at this line.
# 5 return 0;
# 6 }
self.expect(stream.GetData(), "Source code displayed correctly",
exe=False,
patterns = ['=> %d.*Hello world' % self.line])
# Boundary condition testings for SBStream(). LLDB should not crash!
stream.Print(None)
stream.RedirectToFile(None, True)
def test_move_and_then_display_source(self):
"""Test that target.source-map settings work by moving main.c to hidden/main.c."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Move main.c to hidden/main.c.
main_c = "main.c"
main_c_hidden = os.path.join("hidden", main_c)
os.rename(main_c, main_c_hidden)
# Restore main.c after the test.
self.addTearDownHook(lambda: os.rename(main_c_hidden, main_c))
if self.TraceOn():
system([["ls"]])
system([["ls", "hidden"]])
# Set source remapping with invalid replace path and verify we get an error
self.expect("settings set target.source-map /a/b/c/d/e /q/r/s/t/u", error=True,
substrs = ['''error: the replacement path doesn't exist: "/q/r/s/t/u"'''])
# Set target.source-map settings.
self.runCmd("settings set target.source-map %s %s" % (os.getcwd(), os.path.join(os.getcwd(), "hidden")))
# And verify that the settings work.
self.expect("settings show target.source-map",
substrs = [os.getcwd(), os.path.join(os.getcwd(), "hidden")])
# Display main() and verify that the source mapping has been kicked in.
self.expect("source list -n main", SOURCE_DISPLAYED_CORRECTLY,
substrs = ['Hello world'])
def test_modify_source_file_while_debugging(self):
"""Modify a source file while debugging the executable."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
lldbutil.run_break_set_by_file_and_line (self, "main.c", self.line, num_expected_locations=1, loc_exact=True)
self.runCmd("run", RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint.
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs = ['stopped',
'main.c:%d' % self.line,
'stop reason = breakpoint'])
# Display some source code.
self.expect("source list -f main.c -l %d" % self.line, SOURCE_DISPLAYED_CORRECTLY,
substrs = ['Hello world'])
# The '-b' option shows the line table locations from the debug information
# that indicates valid places to set source level breakpoints.
# The file to display is implicit in this case.
self.runCmd("source list -l %d -c 3 -b" % self.line)
output = self.res.GetOutput().splitlines()[0]
# If the breakpoint set command succeeded, we should expect a positive number
# of breakpoints for the current line, i.e., self.line.
import re
m = re.search('^\[(\d+)\].*// Set break point at this line.', output)
if not m:
self.fail("Fail to display source level breakpoints")
self.assertTrue(int(m.group(1)) > 0)
# Read the main.c file content.
with io.open('main.c', 'r', newline='\n') as f:
original_content = f.read()
if self.TraceOn():
print("original content:", original_content)
# Modify the in-memory copy of the original source code.
new_content = original_content.replace('Hello world', 'Hello lldb', 1)
# This is the function to restore the original content.
def restore_file():
#print("os.path.getmtime() before restore:", os.path.getmtime('main.c'))
time.sleep(1)
with io.open('main.c', 'w', newline='\n') as f:
f.write(original_content)
if self.TraceOn():
with open('main.c', 'r') as f:
print("content restored to:", f.read())
# Touch the file just to be sure.
os.utime('main.c', None)
if self.TraceOn():
print("os.path.getmtime() after restore:", os.path.getmtime('main.c'))
# Modify the source code file.
with io.open('main.c', 'w', newline='\n') as f:
time.sleep(1)
f.write(new_content)
if self.TraceOn():
print("new content:", new_content)
print("os.path.getmtime() after writing new content:", os.path.getmtime('main.c'))
# Add teardown hook to restore the file to the original content.
self.addTearDownHook(restore_file)
# Display the source code again. We should see the updated line.
self.expect("source list -f main.c -l %d" % self.line, SOURCE_DISPLAYED_CORRECTLY,
substrs = ['Hello lldb'])
def test_set_breakpoint_with_absolute_path(self):
self.build()
self.runCmd("settings set target.source-map %s %s" % (os.getcwd(), os.path.join(os.getcwd(), "hidden")))
exe = os.path.join(os.getcwd(), "a.out")
main = os.path.join(os.getcwd(), "hidden", "main.c")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
lldbutil.run_break_set_by_file_and_line (self, main, self.line, num_expected_locations=1, loc_exact=False)
self.runCmd("run", RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint.
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs = ['stopped',
'main.c:%d' % self.line,
'stop reason = breakpoint'])
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