Vendor import of lldb trunk r256945:

https://llvm.org/svn/llvm-project/lldb/trunk@256945

4 files changed, 163 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/Makefile b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/Makefile
new file mode 100644
index 0000000..314f1cb
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/Makefile
@@ -0,0 +1,5 @@
+LEVEL = ../../../make
+
+CXX_SOURCES := main.cpp
+
+include $(LEVEL)/Makefile.rules
diff --git a/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/TestSyntheticCapping.py b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/TestSyntheticCapping.py
new file mode 100644
index 0000000..0550f57
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/TestSyntheticCapping.py
@@ -0,0 +1,75 @@
+"""
+Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs
+"""
+
+from __future__ import print_function
+
+
+
+import os, time
+import lldb
+from lldbsuite.test.lldbtest import *
+import lldbsuite.test.lldbutil as lldbutil
+
+class SyntheticCappingTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break at.
+        self.line = line_number('main.cpp', '// Set break point at this line.')
+
+    def test_with_run_command(self):
+        """Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs."""
+        self.build()
+        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
+
+        lldbutil.run_break_set_by_file_and_line (self, "main.cpp", 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',
+                       'stop reason = breakpoint'])
+
+        # This is the function to remove the custom formats in order to have a
+        # clean slate for the next test case.
+        def cleanup():
+            self.runCmd('type format clear', check=False)
+            self.runCmd('type summary clear', check=False)
+            self.runCmd('type filter clear', check=False)
+            self.runCmd('type synth clear', check=False)
+            self.runCmd("settings set target.max-children-count 256", check=False)
+
+        # Execute the cleanup function during test case tear down.
+        self.addTearDownHook(cleanup)
+
+        # set up the synthetic children provider
+        self.runCmd("script from fooSynthProvider import *")
+        self.runCmd("type synth add -l fooSynthProvider foo")
+
+        # check that the synthetic children work, so we know we are doing the right thing
+        self.expect("frame variable f00_1",
+                    substrs = ['r = 33',
+                               'fake_a = 16777216',
+                               'a = 0']);
+
+        # check that capping works
+        self.runCmd("settings set target.max-children-count 2", check=False)
+        
+        self.expect("frame variable f00_1",
+                    substrs = ['...',
+                               'fake_a = 16777216',
+                               'a = 0']);
+        
+        self.expect("frame variable f00_1", matching=False,
+                    substrs = ['r = 33']);
+
+        
+        self.runCmd("settings set target.max-children-count 256", check=False)
+
+        self.expect("frame variable f00_1", matching=True,
+                    substrs = ['r = 33']);
diff --git a/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/fooSynthProvider.py b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/fooSynthProvider.py
new file mode 100644
index 0000000..fb95ac2
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/fooSynthProvider.py
@@ -0,0 +1,21 @@
+import lldb
+class fooSynthProvider:
+     def __init__(self, valobj, dict):
+         self.valobj = valobj;
+         self.int_type = valobj.GetType().GetBasicType(lldb.eBasicTypeInt)
+     def num_children(self):
+         return 3;
+     def get_child_at_index(self, index):
+         if index == 0:
+             child = self.valobj.GetChildMemberWithName('a');
+         if index == 1:
+             child = self.valobj.CreateChildAtOffset ('fake_a', 1, self.int_type);
+         if index == 2:
+             child = self.valobj.GetChildMemberWithName('r');
+         return child;
+     def get_child_index(self, name):
+         if name == 'a':
+             return 0;
+         if name == 'fake_a':
+             return 1;
+    	 return 2;
diff --git a/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/main.cpp b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/main.cpp
new file mode 100644
index 0000000..b921915
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/data-formatter/synthcapping/main.cpp
@@ -0,0 +1,62 @@
+struct foo
+{
+    int a;
+    int b;
+    int c;
+    int d;
+    int e;
+    int f;
+    int g;
+    int h;
+    int i;
+    int j;
+    int k;
+    int l;
+    int m;
+    int n;
+    int o;
+    int p;
+    int q;
+    int r;
+    
+    foo(int X) :
+    a(X),
+    b(X+1),
+    c(X+3),
+    d(X+5),
+    e(X+7),
+    f(X+9),
+    g(X+11),
+    h(X+13),
+    i(X+15),
+    j(X+17),
+    k(X+19),
+    l(X+21),
+    m(X+23),
+    n(X+25),
+    o(X+27),
+    p(X+29),
+    q(X+31),
+    r(X+33) {}
+};
+
+struct wrapint
+{
+    int x;
+    wrapint(int X) : x(X) {}
+};
+
+int main()
+{
+    foo f00_1(0);
+    foo *f00_ptr = new foo(12);
+    
+    f00_1.a++; // Set break point at this line.
+    
+    wrapint test_cast('A' +
+               256*'B' +
+               256*256*'C'+
+               256*256*256*'D');
+    
+    return 0;
+}
\ No newline at end of file