ddcc updated this revision to Diff 259981.
ddcc added a comment.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
Support statically-built passes
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D77704/new/
https://reviews.llvm.org/D77704
Files:
clang/lib/Driver/ToolChains/CommonArgs.cpp
llvm/tools/gold/CMakeLists.txt
llvm/tools/gold/gold-plugin.cpp
llvm/tools/gold/gold.exports
Index: llvm/tools/gold/gold.exports
===
--- llvm/tools/gold/gold.exports
+++ /dev/null
@@ -1 +0,0 @@
-onload
Index: llvm/tools/gold/gold-plugin.cpp
===
--- llvm/tools/gold/gold-plugin.cpp
+++ llvm/tools/gold/gold-plugin.cpp
@@ -23,6 +23,7 @@
#include "llvm/Object/Error.h"
#include "llvm/Support/CachePruning.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
@@ -207,6 +208,12 @@
static std::string stats_file;
// Asserts that LTO link has whole program visibility
static bool whole_program_visibility = false;
+ // List of new PM pass plugins
+ static std::vector pass_plugins;
+ // Path to ourselves, and whether we have been reloaded for pass plugin
symbol
+ // resolution
+ static std::string self;
+ static bool self_reloaded = false;
// Optimization remarks filename, accepted passes and hotness options
static std::string RemarksFilename;
@@ -300,6 +307,30 @@
RemarksFormat = std::string(opt);
} else if (opt.consume_front("stats-file=")) {
stats_file = std::string(opt);
+} else if (opt.consume_front("self=")) {
+ // Store our own path, in case we need to be reloaded
+ self = std::string(opt);
+} else if (opt.consume_front("load=")) {
+ std::string Error, Path(opt);
+
+ // This plugin is loaded by gold under RTLD_LOCAL, which means that our
+ // LLVM symbols are not available to subsequent pass plugins. Since this
+ // will break statically-built pass plugins, we reload with RTLD_GLOBAL.
+ if (!self_reloaded) {
+if (self.size()) {
+ if (sys::DynamicLibrary::LoadLibraryPermanently(self.c_str(),
))
+message(LDPL_ERROR, "Unable to reload LLVM gold plugin: %s",
+Error.c_str());
+ else
+self_reloaded = true;
+} else
+ message(LDPL_ERROR, "Unable to retrieve path to LLVM gold plugin!");
+ }
+
+ if (sys::DynamicLibrary::LoadLibraryPermanently(Path.c_str(), ))
+message(LDPL_ERROR, "Unable to load plugin: %s", Error.c_str());
+} else if (opt.consume_front("load-pass-plugin=")) {
+ pass_plugins.push_back(opt.data());
} else {
// Save this option to pass to the code generator.
// ParseCommandLineOptions() expects argv[0] to be program name. Lazily
@@ -935,6 +966,8 @@
Conf.UseNewPM = options::new_pass_manager;
// Debug new pass manager if requested
Conf.DebugPassManager = options::debug_pass_manager;
+ // Pass plugins to load
+ Conf.PassPlugins = std::move(options::pass_plugins);
Conf.HasWholeProgramVisibility = options::whole_program_visibility;
Index: llvm/tools/gold/CMakeLists.txt
===
--- llvm/tools/gold/CMakeLists.txt
+++ llvm/tools/gold/CMakeLists.txt
@@ -1,5 +1,3 @@
-set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/gold.exports)
-
if( LLVM_ENABLE_PIC AND LLVM_BINUTILS_INCDIR )
include_directories( ${LLVM_BINUTILS_INCDIR} )
Index: clang/lib/Driver/ToolChains/CommonArgs.cpp
===
--- clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -379,6 +379,9 @@
Suffix,
Plugin);
CmdArgs.push_back(Args.MakeArgString(Plugin));
+
+// Pass in our own path in case we need to reload
+CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=self=") + Plugin));
}
// Try to pass driver level flags relevant to LTO code generation down to
Index: llvm/tools/gold/gold.exports
===
--- llvm/tools/gold/gold.exports
+++ /dev/null
@@ -1 +0,0 @@
-onload
Index: llvm/tools/gold/gold-plugin.cpp
===
--- llvm/tools/gold/gold-plugin.cpp
+++ llvm/tools/gold/gold-plugin.cpp
@@ -23,6 +23,7 @@
#include "llvm/Object/Error.h"
#include "llvm/Support/CachePruning.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
@@ -207,6 +208,12 @@
static std::string
