ff6069b891
This patch use the same way as the https://reviews.llvm.org/rGfe1fa43f16beac1506a2e73a9f7b3c81179744eb to handle the thread local variable. It allocates 2 * pointerSize space in GOT to represent the thread key and data address. Instead of using the _tls_get_addr function, I customed a function __orc_rt_elfnix_tls_get_addr to get the address of thread local varible. Currently, this is a wip patch, only one TLS relocation R_X86_64_TLSGD is supported and I need to add the corresponding test cases. To allocate the TLS descriptor in GOT, I need to get the edge kind information in PerGraphGOTAndPLTStubBuilder, So I add a `Edge::Kind K` argument in some functions in PerGraphGOTAndPLTStubBuilder.h. If it is not suitable, I can think further to solve this problem. Differential Revision: https://reviews.llvm.org/D109293
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
//===---------------- PerGraphTLSInfoEntryBuilder.h -------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Construct Thread local storage info entry for each graph.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_JITLINK_PERGRAPHTLSINFOENTRYBUILDER_H
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#define LLVM_EXECUTIONENGINE_JITLINK_PERGRAPHTLSINFOENTRYBUILDER_H
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#include "llvm/ExecutionEngine/JITLink/JITLink.h"
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#include "llvm/Support/Debug.h"
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#define DEBUG_TYPE "jitlink"
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namespace llvm {
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namespace jitlink {
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template <typename BuilderImplT> class PerGraphTLSInfoEntryBuilder {
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public:
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PerGraphTLSInfoEntryBuilder(LinkGraph &G) : G(G) {}
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static Error asPass(LinkGraph &G) { return BuilderImplT(G).run(); }
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Error run() {
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LLVM_DEBUG(dbgs() << "Running Per-Graph TLS Info entry builder:\n ");
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std::vector<Block *> Worklist(G.blocks().begin(), G.blocks().end());
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for (auto *B : Worklist)
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for (auto &E : B->edges()) {
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if (impl().isTLSEdgeToFix(E)) {
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LLVM_DEBUG({
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dbgs() << " Fixing " << G.getEdgeKindName(E.getKind())
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<< " edge at " << formatv("{0:x}", B->getFixupAddress(E))
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<< " (" << formatv("{0:x}", B->getAddress()) << " + "
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<< formatv("{0:x}", E.getOffset()) << ")\n";
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});
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impl().fixTLSEdge(E, getTLSInfoEntry(E.getTarget()));
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}
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}
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return Error::success();
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}
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protected:
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LinkGraph &G;
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Symbol &getTLSInfoEntry(Symbol &Target) {
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assert(Target.hasName() && "TLS edge cannot point to anonymous target");
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auto TLSInfoEntryI = TLSInfoEntries.find(Target.getName());
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if (TLSInfoEntryI == TLSInfoEntries.end()) {
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auto &TLSInfoEntry = impl().createTLSInfoEntry(Target);
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LLVM_DEBUG({
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dbgs() << " Created TLS Info entry for " << Target.getName() << ": "
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<< TLSInfoEntry << "\n";
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});
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TLSInfoEntryI =
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TLSInfoEntries.insert(std::make_pair(Target.getName(), &TLSInfoEntry))
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.first;
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}
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assert(TLSInfoEntryI != TLSInfoEntries.end() &&
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"Could not get TLSInfo symbol");
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LLVM_DEBUG({
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dbgs() << " Using TLS Info entry" << *TLSInfoEntryI->second << "\n";
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});
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return *TLSInfoEntryI->second;
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}
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private:
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DenseMap<StringRef, Symbol *> TLSInfoEntries;
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BuilderImplT &impl() { return static_cast<BuilderImplT &>(*this); }
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};
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} // namespace jitlink
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} // namespace llvm
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#endif
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