[Lldb-commits] [PATCH] D84716: [lldb/ArchSpec] Always match simulator environment in IsEqualTo

Frederic Riss via Phabricator via lldb-commits lldb-commits at lists.llvm.org
Mon Jul 27 17:07:40 PDT 2020

friss created this revision.
friss added a reviewer: aprantl.
Herald added subscribers: dexonsmith, inglorion.
Herald added a project: LLDB.

Initially, Apple simulator binarie triples didn't use a `-simulator`
environment and were just differentiated based on the architecture.
For example, `x86_64-apple-ios` would obviously be a simualtor as iOS
doesn't run on x86_64. With Catalyst, we made the disctinction
explicit and today, all simulator triples (even the legacy ones) are
constructed with an environment. This is especially important on Apple
Silicon were the architecture is not different from the one of the
simulated device.

This change makes the simulator part of the environment always part of
the criteria to detect whether 2 `ArchSpec`s are equal or compatible.

  rG LLVM Github Monorepo



Index: lldb/unittests/Utility/ArchSpecTest.cpp
--- lldb/unittests/Utility/ArchSpecTest.cpp
+++ lldb/unittests/Utility/ArchSpecTest.cpp
@@ -314,6 +314,14 @@
     // this is the desired behavior.
+  {
+    ArchSpec A("arm64-apple-ios");
+    ArchSpec B("arm64-apple-ios-simulator");
+    ASSERT_FALSE(A.IsExactMatch(B));
+    ASSERT_FALSE(A.IsCompatibleMatch(B));
+    ASSERT_FALSE(B.IsCompatibleMatch(A));
+    ASSERT_FALSE(B.IsCompatibleMatch(A));
+  }
     ArchSpec A("x86_64-*-*");
     ArchSpec B("x86_64-apple-ios-simulator");
Index: lldb/source/Utility/ArchSpec.cpp
--- lldb/source/Utility/ArchSpec.cpp
+++ lldb/source/Utility/ArchSpec.cpp
@@ -987,6 +987,12 @@
   if (lhs == rhs)
     return true;
+  // Apple simulators are a different platform than what they simulate.
+  // As the environments are different at this point, if one of them is a
+  // simulator, then they are different.
+  if (lhs == llvm::Triple::Simulator || rhs == llvm::Triple::Simulator)
+    return false;
   // If any of the environment is unknown then they are compatible
   if (lhs == llvm::Triple::UnknownEnvironment ||
       rhs == llvm::Triple::UnknownEnvironment)

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