iOS simulator cleanup to make sure we use "*-apple-ios" for iOS simulator apps and binaries.

Changes include:
- ObjectFileMachO can now determine if a binary is "*-apple-ios" or "*-apple-macosx" by checking the min OS and SDK load commands
- ArchSpec now says "<arch>-apple-macosx" is equivalent to "<arch>-apple-ios" since the simulator mixes and matches binaries (some from the system and most from the iOS SDK).
- Getting process inforamtion on MacOSX now correctly classifies iOS simulator processes so they have "*-apple-ios" architectures in the ProcessInstanceInfo
- PlatformiOSSimulator can now list iOS simulator processes correctly instead of showing nothing by using:
    (lldb) platform select ios-simulator
    (lldb) platform process list
- debugserver can now properly return "*-apple-ios" for the triple in the process info packets for iOS simulator executables
- GDBRemoteCommunicationClient now correctly passes along the triples it gets for process info by setting the OS in the llvm::Triple correctly

<rdar://problem/17060217>

llvm-svn: 209852

1 files changed, 28 insertions, 4 deletions

diff --git a/lldb/source/Core/ArchSpec.cpp b/lldb/source/Core/ArchSpec.cpp
index 6d708f158ed..82764699b8c 100644
--- a/lldb/source/Core/ArchSpec.cpp
+++ b/lldb/source/Core/ArchSpec.cpp
@@ -844,10 +844,34 @@ ArchSpec::IsEqualTo (const ArchSpec& rhs, bool exact_match) const
                 if (rhs_os_specified && lhs_os_specified)
                     return false;
             }
-            // Only fail if both os types are not unknown
-            if (lhs_triple_os != llvm::Triple::UnknownOS &&
-                rhs_triple_os != llvm::Triple::UnknownOS)
-                return false;
+            
+            bool ios_simulator_compatible = false;
+            // Check for iOS desktop simulator matches where:
+            // x86_64-apple-ios is compatible with x86_64-apple-macosx
+            // i386-apple-ios is compatible with i386-apple-macosx
+            if (lhs_triple_vendor == llvm::Triple::Apple)
+            {
+                const llvm::Triple::ArchType lhs_arch = lhs_triple.getArch();
+                if (lhs_arch == llvm::Triple::x86_64 ||
+                    lhs_arch == llvm::Triple::x86)
+                {
+                    if ((lhs_triple_os == llvm::Triple::MacOSX && rhs_triple_os == llvm::Triple::IOS    ) ||
+                        (lhs_triple_os == llvm::Triple::IOS    && rhs_triple_os == llvm::Triple::MacOSX ))
+                    {
+                        ios_simulator_compatible = true;
+                    }
+                        
+                }
+            }
+            
+            // Only fail if both os types are not unknown or if we determined the triples
+            // match for x86_64 or x86 iOS simulator
+            if (!ios_simulator_compatible)
+            {
+                if (lhs_triple_os != llvm::Triple::UnknownOS &&
+                    rhs_triple_os != llvm::Triple::UnknownOS)
+                    return false;
+            }
         }
 
         const llvm::Triple::EnvironmentType lhs_triple_env = lhs_triple.getEnvironment();