testsuite: Fix TestCompDirSymLink and TestSourceManager on Linux with symlinked build dir

[jankratochvil]

Summary

Getting failure when building in a directory which is symlinked elsewhere:

Failing Tests (1):
    lldb-Suite :: functionalities/breakpoint/comp_dir_symlink/TestCompDirSymLink.py
    lldb-Suite :: source-manager/TestSourceManager.py

runCmd: file /home/jkratoch/redhat/llvm-monorepo-clangassert/lldb-test-build.noindex/functionalities/breakpoint/comp_dir_symlink/TestCompDirSymLink.test_symlink_paths_set_procselfcwd_dwarf/CompDirSymLink
output: Current executable set to '/home/jkratoch/redhat/llvm-monorepo-clangassert/lldb-test-build.noindex/functionalities/breakpoint/comp_dir_symlink/TestCompDirSymLink.test_symlink_paths_set_procselfcwd_dwarf/CompDirSymLink' (x86_64).
runCmd: settings set plugin.symbol-file.dwarf.comp-dir-symlink-paths /proc/self/cwd
output: None
runCmd: breakpoint set -f "/home/jkratoch/redhat/llvm-monorepo-clangassert/lldb-test-build.noindex/functionalities/breakpoint/comp_dir_symlink/TestCompDirSymLink.test_symlink_paths_set_procselfcwd_dwarf/relative.cpp" -l 11
output: Breakpoint 1: no locations (pending).
WARNING:  Unable to resolve breakpoint to any actual locations.

It is because /proc/self/cwd (used above for plugin.symbol-file.dwarf.comp-dir-symlink-paths) points to an already resolved directory:

(cd /tmp;mkdir real;ln -s real symlink;cd symlink;ls -l /proc/self/cwd)
lrwxrwxrwx 1 jkratoch jkratoch 0 Feb 20 19:55 /proc/self/cwd -> /tmp/real/

TestSourceManager is similar.

lldb/packages/Python/lldbsuite/test/functionalities/breakpoint/comp_dir_symlink/TestCompDirSymLink.py

class CompDirSymLinkTestCase(TestBase):
     def test_symlink_paths_set_procselfcwd(self):
         os.chdir(self.getBuildDir())
         pwd_symlink = '/proc/self/cwd'
         self.doBuild(pwd_symlink)
         self.runCmd(
             "settings set %s %s" %
             (_COMP_DIR_SYM_LINK_PROP, pwd_symlink))
         src_path = self.getBuildArtifact(_SRC_FILE)
+        # /proc/self/cwd points to a realpath form of current directory.
+        src_path = os.path.realpath(src_path)
         lldbutil.run_break_set_by_file_and_line(self, src_path, self.line)
 
     @skipIf(hostoslist=["windows"])
     def test_symlink_paths_unset(self):
         pwd_symlink = self.create_src_symlink()
         self.doBuild(pwd_symlink)
         self.runCmd('settings clear ' + _COMP_DIR_SYM_LINK_PROP)
         src_path = self.getBuildArtifact(_SRC_FILE)

lldb/packages/Python/lldbsuite/test/source-manager/TestSourceManager.py

def test_move_and_then_display_source(self):
 
         # 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"'''])
 
+        # Current directory points to its realpath form.
+        builddir_real = os.path.realpath(self.getBuildDir())
+        hidden_real = os.path.realpath(hidden)
         # Set target.source-map settings.
         self.runCmd("settings set target.source-map %s %s" %
-                    (self.getBuildDir(), hidden))
+                    (builddir_real, hidden_real))
         # And verify that the settings work.
         self.expect("settings show target.source-map",
-                    substrs=[self.getBuildDir(), hidden])
+                    substrs=[builddir_real, hidden_real])
 
         # 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()
def test_modify_source_file_while_debugging(self):
             self.line,
             SOURCE_DISPLAYED_CORRECTLY,
             substrs=['Hello lldb'])
 
     def test_set_breakpoint_with_absolute_path(self):
         self.build()
         hidden = self.getBuildArtifact("hidden")
         lldbutil.mkdir_p(hidden)
+        # Current directory points to its realpath form.
+        builddir_real = os.path.realpath(self.getBuildDir())
+        hidden_real = os.path.realpath(hidden)
         self.runCmd("settings set target.source-map %s %s" %
-                    (self.getBuildDir(), hidden))
+                    (builddir_real, hidden_real))
 
         exe = self.getBuildArtifact("a.out")
-        main = os.path.join(self.getBuildDir(), "hidden", "main-copy.c")
+        main = os.path.join(builddir_real, "hidden", "main-copy.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-copy.c:%d' % self.line,
                              'stop reason = breakpoint'])