[Lldb-commits] [lldb] 35cec80 - [lldb][test] Workaround older systems that lack gettid (#104831)

[via lldb-commits]

Author: Will Hawkins
Date: 2024-08-20T21:09:08-07:00
New Revision: 35cec805bfa91fd9b83c29c45f3a5877e484bd85

URL: https://github.com/llvm/llvm-project/commit/35cec805bfa91fd9b83c29c45f3a5877e484bd85
DIFF: https://github.com/llvm/llvm-project/commit/35cec805bfa91fd9b83c29c45f3a5877e484bd85.diff

LOG: [lldb][test] Workaround older systems that lack gettid (#104831)

Older glibc versions do not provide `gettid`. Provide our own `gettid`
in these cases.

Fixes a build failure caused by #104109.

Added: 
    

Modified: 
    lldb/unittests/Process/elf-core/CMakeLists.txt
    lldb/unittests/Process/elf-core/ThreadElfCoreTest.cpp

Removed: 
    


################################################################################
diff  --git a/lldb/unittests/Process/elf-core/CMakeLists.txt b/lldb/unittests/Process/elf-core/CMakeLists.txt
index b852a3ffb863c1..68ab6e0683c182 100644
--- a/lldb/unittests/Process/elf-core/CMakeLists.txt
+++ b/lldb/unittests/Process/elf-core/CMakeLists.txt
@@ -1,3 +1,6 @@
+include(CheckSymbolExists)
+include(CMakePushCheckState)
+
 add_lldb_unittest(ProcessElfCoreTests
   ThreadElfCoreTest.cpp
 
@@ -13,3 +16,11 @@ add_lldb_unittest(ProcessElfCoreTests
   LINK_COMPONENTS
     Support
   )
+
+cmake_push_check_state()
+set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
+check_symbol_exists(gettid "unistd.h" HAVE_GETTID)
+if(HAVE_GETTID)
+  target_compile_definitions(ProcessElfCoreTests PRIVATE HAVE_GETTID)
+endif()
+cmake_pop_check_state()

diff  --git a/lldb/unittests/Process/elf-core/ThreadElfCoreTest.cpp b/lldb/unittests/Process/elf-core/ThreadElfCoreTest.cpp
index 3bc8b9053d2009..288729b4470607 100644
--- a/lldb/unittests/Process/elf-core/ThreadElfCoreTest.cpp
+++ b/lldb/unittests/Process/elf-core/ThreadElfCoreTest.cpp
@@ -24,6 +24,11 @@
 #include <sys/resource.h>
 #include <unistd.h>
 
+#ifndef HAVE_GETTID
+#include <sys/syscall.h>
+pid_t gettid() { return ((pid_t)syscall(SYS_gettid)); }
+#endif
+
 using namespace lldb_private;
 
 namespace {