statically linking GC PAL on linux (dotnet#76985)

* statically linking GC PAL

The GC PAL will be used for both coreclr and standalone GC on linux

* fixing arm64 and nativeaot build breaks

* macos build break and reducing renaming.

* trying to remove numa support from PAL

* one more rename to resolve MacOS break

* delete pal numa code.

* Adding missing madvise in GC PAL

* added missing MADV_DONTDUMP calls.

* CR feedback

* undo (long long) cast in GetMemoryStatus

* only invoke madvise on success.

src/coreclr/dlls/mscordac/mscordac_unixexports.src

@@ -31,7 +31,6 @@ nativeStringResourceTable_mscorrc
 #PAL_fwprintf
 #PAL_GetLogicalCpuCountFromOS
 #PAL_GetTotalCpuCount
-#PAL_GetNumaProcessorNode
 #PAL_GetUnwindInfoSize
 #PAL_get_stdout
 #PAL_get_stderr
@@ -126,7 +125,6 @@ nativeStringResourceTable_mscorrc
 #GetFullPathNameW
 #GetLastError
 #GetModuleFileNameW
-#GetNumaHighestNodeNumber
 #GetProcAddress
 #GetStdHandle
 #GetSystemInfo
@@ -168,7 +166,6 @@ nativeStringResourceTable_mscorrc
 #SwitchToThread
 #TerminateProcess
 #VirtualAlloc
-#VirtualAllocExNuma
 #VirtualFree
 #VirtualProtect
 #VirtualQuery

src/coreclr/dlls/mscoree/coreclr/CMakeLists.txt

@@ -82,6 +82,7 @@ set_property(TARGET coreclr APPEND_STRING PROPERTY LINK_DEPENDS ${EXPORTS_FILE})
 
 if (CLR_CMAKE_HOST_UNIX)
     set(LIB_UNWINDER unwinder_wks)
+    set(GC_PAL gc_unix)
 endif (CLR_CMAKE_HOST_UNIX)
 
 # IMPORTANT! Please do not rearrange the order of the libraries. The linker on Linux is
@@ -108,6 +109,7 @@ set(CORECLR_LIBRARIES
     System.Globalization.Native-Static
     interop
     coreclrminipal
+    ${GC_PAL}
 )
 
 if(CLR_CMAKE_TARGET_WIN32)

src/coreclr/gc/CMakeLists.txt

@@ -27,12 +27,10 @@ set(GC_SOURCES
   handletablecache.cpp)
 
 if(CLR_CMAKE_HOST_UNIX)
+  add_subdirectory(unix)
   include(unix/configure.cmake)
   set (GC_SOURCES
-    ${GC_SOURCES}
-    unix/gcenv.unix.cpp
-    unix/events.cpp
-    unix/cgroup.cpp)
+    ${GC_SOURCES})
 else()
   set (GC_SOURCES
     ${GC_SOURCES}
@@ -101,7 +99,7 @@ if(CLR_CMAKE_HOST_WIN32)
     kernel32.lib
     advapi32.lib)
 else()
-  set (GC_LINK_LIBRARIES)
+  set (GC_LINK_LIBRARIES gc_unix)
 endif(CLR_CMAKE_HOST_WIN32)
 
 list(APPEND GC_SOURCES ${GC_HEADERS})

src/coreclr/gc/unix/cgroup.cpp

@@ -54,6 +54,8 @@ Module Name:
 
 extern bool ReadMemoryValueFromFile(const char* filename, uint64_t* val);
 
+namespace 
+{
 class CGroup
 {
     // the cgroup version number or 0 to indicate cgroups are not found or not enabled
@@ -453,6 +455,7 @@ class CGroup
         return foundInactiveFileValue;
     }
 };
+}
 
 int CGroup::s_cgroup_version = 0;
 char *CGroup::s_memory_cgroup_path = nullptr;

src/coreclr/gc/unix/gcenv.unix.cpp

@@ -659,6 +659,10 @@ static void* VirtualReserveInner(size_t size, size_t alignment, uint32_t flags,
         }
 
         pRetVal = pAlignedRetVal;
+#ifdef MADV_DONTDUMP
+        // Do not include reserved memory in coredump.
+        madvise(pRetVal, size, MADV_DONTDUMP);
+#endif
     }
 
     return pRetVal;
@@ -724,6 +728,14 @@ bool GCToOSInterface::VirtualCommit(void* address, size_t size, uint16_t node)
 {
     bool success = mprotect(address, size, PROT_WRITE | PROT_READ) == 0;
 
+#ifdef MADV_DODUMP
+    if (success)
+    {
+        // Include committed memory in coredump.
+        madvise(address, size, MADV_DODUMP);
+    }
+#endif
+
 #if HAVE_NUMA_H
     if (success && g_numaAvailable && (node != NUMA_NODE_UNDEFINED))
     {
@@ -760,7 +772,17 @@ bool GCToOSInterface::VirtualDecommit(void* address, size_t size)
     // that much more clear to the operating system that we no
     // longer need these pages. Also, GC depends on re-committed pages to
     // be zeroed-out.
-    return mmap(address, size, PROT_NONE, MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0) != NULL;
+    bool bRetVal = mmap(address, size, PROT_NONE, MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0) != MAP_FAILED;
+
+#ifdef MADV_DONTDUMP
+    if (bRetVal)
+    {
+        // Do not include freed memory in coredump.
+        madvise(address, size, MADV_DONTDUMP);
+    }
+#endif
+
+    return  bRetVal;
 }
 
 // Reset virtual memory range. Indicates that data in the memory range specified by address and size is no
@@ -791,6 +813,14 @@ bool GCToOSInterface::VirtualReset(void * address, size_t size, bool unlock)
 #endif
     }
 
+#ifdef MADV_DONTDUMP
+    if (st == 0)
+    {
+        // Do not include reset memory in coredump.
+        madvise(address, size, MADV_DONTDUMP);
+    }
+#endif
+
     return (st == 0);
 }
 

src/coreclr/pal/src/CMakeLists.txt

@@ -171,7 +171,6 @@ set(SOURCES
   misc/sysinfo.cpp
   misc/time.cpp
   misc/utils.cpp
-  numa/numa.cpp
   objmgr/palobjbase.cpp
   objmgr/shmobject.cpp
   objmgr/shmobjectmanager.cpp

src/coreclr/pal/src/include/pal/palinternal.h

@@ -652,7 +652,7 @@ typedef enum _TimeConversionConstants
 }
 
 bool
-ReadMemoryValueFromFile(const char* filename, uint64_t* val);
+PAL_ReadMemoryValueFromFile(const char* filename, uint64_t* val);
 
 #ifdef __APPLE__
 bool

src/coreclr/pal/src/init/pal.cpp

@@ -673,13 +673,6 @@ Initialize(
             goto CLEANUP15;
         }
 
-        if (FALSE == NUMASupportInitialize())
-        {
-            ERROR("Unable to initialize NUMA support\n");
-            palError = ERROR_PALINIT_NUMA;
-            goto CLEANUP15;
-        }
-
         TRACE("First-time PAL initialization complete.\n");
         init_count++;
 

src/coreclr/pal/src/misc/cgroup.cpp

@@ -470,7 +470,7 @@ class CGroup
 
     static bool ReadMemoryValueFromFile(const char* filename, uint64_t* val)
     {
-        return ::ReadMemoryValueFromFile(filename, val);
+        return ::PAL_ReadMemoryValueFromFile(filename, val);
     }
 
     static bool GetCGroup1CpuLimit(UINT *val)

src/coreclr/pal/src/misc/sysinfo.cpp

@@ -504,7 +504,7 @@ PAL_HasGetCurrentProcessorNumber()
 }
 
 bool
-ReadMemoryValueFromFile(const char* filename, uint64_t* val)
+PAL_ReadMemoryValueFromFile(const char* filename, uint64_t* val)
 {
     bool result = false;
     char *line = nullptr;
@@ -585,11 +585,11 @@ PAL_GetLogicalProcessorCacheSizeFromOS()
         {
             path_to_size_file[index] = (char)(48 + i);
 
-            if (ReadMemoryValueFromFile(path_to_size_file, &size))
+            if (PAL_ReadMemoryValueFromFile(path_to_size_file, &size))
             {
                 path_to_level_file[index] = (char)(48 + i);
 
-                if (ReadMemoryValueFromFile(path_to_level_file, &level))
+                if (PAL_ReadMemoryValueFromFile(path_to_level_file, &level))
                 {
                     UPDATE_CACHE_SIZE_AND_LEVEL(size, level)
                 }