Vendor import of lldb release_38 branch r260756:vendor/lldb/lldb-release_380-r262564vendor/lldb/lldb-release_38-r260756

https://llvm.org/svn/llvm-project/lldb/branches/release_38@260756

7 files changed, 127 insertions, 5 deletions

diff --git a/packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py b/packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py
index 90e847fd5fa2..5e1f307f622d 100644
--- a/packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py
+++ b/packages/Python/lldbsuite/test/expression_command/char/TestExprsChar.py
@@ -65,5 +65,6 @@ class ExprCharTestCase(TestBase):
     @expectedFailurei386("llvm.org/pr23069")
     @expectedFailurex86_64("llvm.org/pr23069")
     @expectedFailureWindows("llvm.org/pr21765")
+    @expectedFailureAll(bugnumber="llvm.org/pr23069", triple = 'mips*')
     def test_unsigned_char(self):
         self.do_test(dictionary={'CFLAGS_EXTRAS': '-funsigned-char'})
diff --git a/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/Makefile b/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/Makefile
new file mode 100644
index 000000000000..77aa24afc0f7
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/Makefile
@@ -0,0 +1,6 @@
+LEVEL = ../../../make
+
+C_SOURCES := main.c
+
+include $(LEVEL)/Makefile.rules
+
diff --git a/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/TestAvoidBreakpointInDelaySlot.py b/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/TestAvoidBreakpointInDelaySlot.py
new file mode 100644
index 000000000000..324401ff44e1
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/TestAvoidBreakpointInDelaySlot.py
@@ -0,0 +1,84 @@
+"""
+Test specific to MIPS 
+"""
+
+from __future__ import print_function
+
+import os, time
+import re
+import unittest2
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.lldbtest import *
+
+class AvoidBreakpointInDelaySlotAPITestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipUnlessArch(archs=re.compile('mips*'))
+    def test(self):
+        self.build()
+        exe = os.path.join(os.getcwd(), "a.out")
+        self.expect("file " + exe,
+                    patterns = [ "Current executable set to .*a.out.*" ])
+        
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        breakpoint = target.BreakpointCreateByName('main', 'a.out')
+        self.assertTrue(breakpoint and
+                        breakpoint.GetNumLocations() == 1,
+                        VALID_BREAKPOINT)
+
+        # Now launch the process, and do not stop at entry point.
+        process = target.LaunchSimple (None, None, self.get_process_working_directory())
+        self.assertTrue(process, PROCESS_IS_VALID)
+
+        list = target.FindFunctions('foo', lldb.eFunctionNameTypeAuto)
+        self.assertTrue(list.GetSize() == 1)
+        sc = list.GetContextAtIndex(0)
+        self.assertTrue(sc.GetSymbol().GetName() == "foo")
+        function = sc.GetFunction()
+        self.assertTrue(function)
+        self.function(function, target)
+
+    def function (self, function, target):
+        """Iterate over instructions in function and place a breakpoint on delay slot instruction"""
+        # Get the list of all instructions in the function
+        insts = function.GetInstructions(target)
+        print(insts)
+        i = 0
+        for inst in insts:
+            if (inst.HasDelaySlot()):
+                # Remember the address of branch instruction.
+                branchinstaddress = inst.GetAddress().GetLoadAddress(target)
+
+                # Get next instruction i.e delay slot instruction.
+                delayinst = insts.GetInstructionAtIndex(i+1)
+                delayinstaddr = delayinst.GetAddress().GetLoadAddress(target)
+
+                # Set breakpoint on delay slot instruction
+                breakpoint = target.BreakpointCreateByAddress(delayinstaddr)
+
+                # Verify the breakpoint.
+                self.assertTrue(breakpoint and
+                                breakpoint.GetNumLocations() == 1,
+                                VALID_BREAKPOINT)
+                # Get the location from breakpoint
+                location = breakpoint.GetLocationAtIndex(0)
+
+                # Get the address where breakpoint is actually set.
+                bpaddr = location.GetLoadAddress()
+		
+                # Breakpoint address should be adjusted to the address of branch instruction.
+                self.assertTrue(branchinstaddress ==  bpaddr)
+                i += 1
+            else:
+                i += 1
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()
diff --git a/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/main.c b/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/main.c
new file mode 100644
index 000000000000..bc3eceea7693
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/breakpoint/breakpoint_in_delayslot/main.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+foo (int a, int b)
+{
+    int c;
+    if (a<=b)
+        c=b-a;
+    else
+        c=b+a;
+    return c;
+}
+
+int main()
+{
+    int a=7, b=8, c;
+    
+    c = foo(a, b);
+
+return 0;
+}
+
diff --git a/packages/Python/lldbsuite/test/lldbtest.py b/packages/Python/lldbsuite/test/lldbtest.py
index 3ad6d29a1d7a..de8f57f63706 100644
--- a/packages/Python/lldbsuite/test/lldbtest.py
+++ b/packages/Python/lldbsuite/test/lldbtest.py
@@ -633,6 +633,14 @@ def check_list_or_lambda(list_or_lambda, value):
     else:
         return list_or_lambda is None or value is None or list_or_lambda == value
 
+def matchArchitectures(archs, actual_arch):
+    retype = type(re.compile('hello, world'))
+    list_passes = isinstance(archs, list) and actual_arch in archs
+    basestring_passes = isinstance(archs, six.string_types) and actual_arch == archs
+    regex_passes = isinstance(archs, retype) and re.match(archs, actual_arch)
+
+    return (list_passes or basestring_passes or regex_passes)
+
 # provide a function to xfail on defined oslist, compiler version, and archs
 # if none is specified for any argument, that argument won't be checked and thus means for all
 # for example,
@@ -1026,7 +1034,7 @@ def skipUnlessHostPlatform(oslist):
     return unittest2.skipUnless(getHostPlatform() in oslist,
                                 "requires on of %s" % (", ".join(oslist)))
 
-def skipUnlessArch(archlist):
+def skipUnlessArch(archs):
     """Decorate the item to skip tests unless running on one of the listed architectures."""
     def myImpl(func):
         if isinstance(func, type) and issubclass(func, unittest2.TestCase):
@@ -1035,9 +1043,8 @@ def skipUnlessArch(archlist):
         @wraps(func)
         def wrapper(*args, **kwargs):
             self = args[0]
-            if self.getArchitecture() not in archlist:
-                self.skipTest("skipping for architecture %s (requires one of %s)" % 
-                    (self.getArchitecture(), ", ".join(archlist)))
+            if not matchArchitectures(archs, self.getArchitecture()):
+                self.skipTest("skipping for architecture %s" % (self.getArchitecture())) 
             else:
                 func(*args, **kwargs)
         return wrapper
diff --git a/packages/Python/lldbsuite/test/python_api/function_symbol/TestSymbolAPI.py b/packages/Python/lldbsuite/test/python_api/function_symbol/TestSymbolAPI.py
index d45f5724f49c..187ba69def0e 100644
--- a/packages/Python/lldbsuite/test/python_api/function_symbol/TestSymbolAPI.py
+++ b/packages/Python/lldbsuite/test/python_api/function_symbol/TestSymbolAPI.py
@@ -24,7 +24,6 @@ class SymbolAPITestCase(TestBase):
         self.line2 = line_number('main.c', '// Find the line number for breakpoint 2 here.')
 
     @add_test_categories(['pyapi'])
-    @expectedFailureWindows("llvm.org/pr24778")
     def test(self):
         """Exercise some SBSymbol and SBAddress APIs."""
         self.build()
diff --git a/packages/Python/lldbsuite/test/python_api/lldbutil/process/TestPrintStackTraces.py b/packages/Python/lldbsuite/test/python_api/lldbutil/process/TestPrintStackTraces.py
index b48ded4dd365..97bfa3956f6c 100644
--- a/packages/Python/lldbsuite/test/python_api/lldbutil/process/TestPrintStackTraces.py
+++ b/packages/Python/lldbsuite/test/python_api/lldbutil/process/TestPrintStackTraces.py
@@ -22,6 +22,10 @@ class ThreadsStackTracesTestCase(TestBase):
         self.line = line_number('main.cpp', '// Set break point at this line.')
 
     @expectedFailureAll("llvm.org/pr23043", ["linux"], archs=["i386"]) # We are unable to produce a backtrace of the main thread when the thread is blocked in fgets
+
+    #The __thread_start function in libc doesn't contain any epilogue and prologue instructions 
+    #hence unwinding fail when we are stopped in __thread_start
+    @expectedFailureAll(triple = 'mips*')
     @expectedFailureWindows("llvm.org/pr24778")
     @add_test_categories(['pyapi'])
     def test_stack_traces(self):