[LLDB] - Improved DWARF5 support.

This patch improves the support of DWARF5.
Particularly the reporting of source code locations.

Differential revision: https://reviews.llvm.org/D51935

llvm-svn: 342153

lldb/packages/Python/lldbsuite/test/functionalities/show_location/TestShowLocationDwarf5.py

@@ -0,0 +1,34 @@
+import lldb
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+
+# This test checks that source code location is shown correctly
+# when DWARF5 debug information is used.
+
+class TestTargetSourceMap(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def test_source_map(self):
+        # Set the target soure map to map "./" to the current test directory.
+        yaml_path = os.path.join(self.getSourceDir(), "a.yaml")
+        yaml_base, ext = os.path.splitext(yaml_path)
+        obj_path = self.getBuildArtifact(yaml_base)
+        self.yaml2obj(yaml_path, obj_path)
+
+        def cleanup():
+            if os.path.exists(obj_path):
+                os.unlink(obj_path)
+
+        # Execute the cleanup function during test case tear down.
+        self.addTearDownHook(cleanup)
+
+        # Create a target with the object file we just created from YAML
+        target = self.dbg.CreateTarget(obj_path)
+
+        # Check we are able to show the locations properly.
+        self.expect("b main", VALID_BREAKPOINT_LOCATION,
+                    substrs=['main + 13 at test.cpp:2:3, address = 0x000000000040052d'])
+
+        self.expect("b foo", VALID_BREAKPOINT_LOCATION,
+                    substrs=['foo() + 4 at test.cpp:6:1, address = 0x0000000000400534'])

lldb/packages/Python/lldbsuite/test/functionalities/show_location/a.yaml

@@ -0,0 +1,58 @@
+# This file is a shorten version of the output
+# produced with the following invocations and input:
+# ./clang test.cpp -g -gdwarf-5 -o test.exe
+# ./obj2yaml test.exe > test.yaml
+#
+# // test.cpp
+# int main() {
+#   return 0;
+# }
+# 
+# void foo() {
+# }
+
+--- !ELF
+FileHeader:      
+  Class:           ELFCLASS64
+  Data:            ELFDATA2LSB
+  Type:            ET_EXEC
+  Machine:         EM_X86_64
+  Entry:           0x0000000000400440
+Sections:        
+  - Name:            .text
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_ALLOC, SHF_EXECINSTR ]
+    Address:         0x0000000000400440
+    AddressAlign:    0x0000000000000010
+    Content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
+  - Name:            .debug_str_offsets
+    Type:            SHT_PROGBITS
+    AddressAlign:    0x0000000000000001
+    Content:         200000000500000000000000230000002C0000004A0000004F000000530000005B000000
+  - Name:            .debug_str
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_MERGE, SHF_STRINGS ]
+    AddressAlign:    0x0000000000000001
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+    AddressAlign:    0x0000000000000001
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+  - Name:            .debug_info
+    Type:            SHT_PROGBITS
+    AddressAlign:    0x0000000000000001
+    Content:         50000000050001080000000001000400010800000000000000022005400000000000160000000220054000000000000F00000001560301014F000000033005400000000000060000000156050601050404050400
+  - Name:            .debug_macinfo
+    Type:            SHT_PROGBITS
+    AddressAlign:    0x0000000000000001
+    Content:         '00'
+  - Name:            .debug_line
+    Type:            SHT_PROGBITS
+    AddressAlign:    0x0000000000000001
+    Content:         70000000050008004C000000010101FB0E0D00010101010000000100000101011F010000000003011F020F051E021E00000000FD7C0F2E46BA561F7BDA351B04E677091E00000000FD7C0F2E46BA561F7BDA351B04E6770900090220054000000000000105030AC905003F05010A4B0202000101
+  - Name:            .debug_line_str
+    Type:            SHT_PROGBITS
+    Flags:           [ SHF_MERGE, SHF_STRINGS ]
+    AddressAlign:    0x0000000000000001
+    Content:         2F686F6D652F756D622F4C4C564D2F6275696C645F6C6C64622F62696E00746573742E63707000
+...