[PATCH] D156325: [Driver] Link shared asan runtime lib with -z now on Solaris/x86

[Rainer Orth via Phabricator via cfe-commits]

ro created this revision.
ro added reviewers: vitalybuka, MaskRay.
ro added a project: clang.
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As detailed in Issue #64126, several asan tests `FAIL` due to a cycle in `AsanInitInternal`.  This can by avoided by disabling lazy binding with `ld -z now`.

Tested on `amd64-pc-solaris2.11.`


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D156325

Files:
  clang/lib/Driver/ToolChains/Solaris.cpp


Index: clang/lib/Driver/ToolChains/Solaris.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Solaris.cpp
+++ clang/lib/Driver/ToolChains/Solaris.cpp
@@ -151,18 +151,22 @@
       CmdArgs.push_back("-lgcc");
       CmdArgs.push_back("-lm");
     }
+    const SanitizerArgs &SA = getToolChain().getSanitizerArgs(Args);
     if (NeedsSanitizerDeps) {
       linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
 
       // Work around Solaris/amd64 ld bug when calling __tls_get_addr directly.
       // However, ld -z relax=transtls is available since Solaris 11.2, but not
       // in Illumos.
-      const SanitizerArgs &SA = getToolChain().getSanitizerArgs(Args);
       if (getToolChain().getTriple().getArch() == llvm::Triple::x86_64 &&
           (SA.needsAsanRt() || SA.needsStatsRt() ||
            (SA.needsUbsanRt() && !SA.requiresMinimalRuntime())))
         CmdArgs.push_back("-zrelax=transtls");
     }
+    // Avoid AsanInitInternal cycle, Issue #64126.
+    if (getToolChain().getTriple().isX86() && SA.needsSharedRt() &&
+        SA.needsAsanRt())
+      CmdArgs.push_back("-znow");
   }
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,


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