r258698 - Pass --wrap=pthread_create to linker for -fsplit-stack.

[Rafael Espindola via cfe-commits]

Author: rafael
Date: Mon Jan 25 12:29:16 2016
New Revision: 258698

URL: http://llvm.org/viewvc/llvm-project?rev=258698&view=rev
Log:
Pass --wrap=pthread_create to linker for -fsplit-stack.

From

https://gcc.gnu.org/ml/gcc-patches/2010-09/msg01807.html

-fsplit-stack should pass --wrap=pthread_create to linker for -fsplit-stack
It is needed to initialize the stack guard.  This fixes PR 20148.

Patch by H.J Lu!

Added:
    cfe/trunk/test/Driver/split-stack-ld.c
Modified:
    cfe/trunk/lib/Driver/Tools.cpp

Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=258698&r1=258697&r2=258698&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Mon Jan 25 12:29:16 2016
@@ -9001,6 +9001,9 @@ void gnutools::Linker::ConstructJob(Comp
       if (WantPthread && !isAndroid)
         CmdArgs.push_back("-lpthread");
 
+      if (Args.hasArg(options::OPT_fsplit_stack))
+        CmdArgs.push_back("--wrap=pthread_create");
+
       CmdArgs.push_back("-lc");
 
       if (Args.hasArg(options::OPT_static))

Added: cfe/trunk/test/Driver/split-stack-ld.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/split-stack-ld.c?rev=258698&view=auto
==============================================================================
--- cfe/trunk/test/Driver/split-stack-ld.c (added)
+++ cfe/trunk/test/Driver/split-stack-ld.c Mon Jan 25 12:29:16 2016
@@ -0,0 +1,17 @@
+// Test split stack ld flags.
+//
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target i386-unknown-linux -fsplit-stack \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LINUX-I386 %s
+//
+// CHECK-LINUX-I386: "--wrap=pthread_create"
+//
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fsplit-stack \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LINUX-X86-64 %s
+//
+// CHECK-LINUX-X86-64: "--wrap=pthread_create"