19459580af
Expression evaluation for function calls to certain public RenderScript API functions in libRSCPURef can segfault. `slang`, the compiler frontend for RenderScript embeds an ARM specific triple in IR that is shipped in the app, after generating IR that has some assumptions that an ARM device is the target. As the IR is then compiled on a device of unknown (at time the IR was generated at least) architecture, when calling RenderScript API function as part of debugger expressions, we have to perform a fixup pass that removes those assumptions right before the module is sent to be generated by the llvm backend. This issue is caused by multiple problems with the ARMv7-specific assumptions encoded in the LLVM IR. x86 large value returns use a hidden first argument (mapping to llvm::Attribute::StructRet), which can't be picked up by the JIT due to the mismatch between IR generated by the slang frontend and llvm backend. This means that code generated by bcc did not necessarily match the default SysV Linux/Android ABI used by the LLDB JIT - Original Authors: Luke Drummond (@ldrumm), Function declarations fixed by Aidan Dodds (@ADodds) Subscribers: lldb-commits Differential Revision: https://reviews.llvm.org/D18059 llvm-svn: 276976
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
//===-- ExpressionOpts.h ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_RENDERSCRIPT_EXPROPTS_H
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#define LLDB_RENDERSCRIPT_EXPROPTS_H
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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#include "llvm/IR/Module.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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// Project includes
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#include "lldb/Target/LanguageRuntime.h"
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#include "lldb/Target/Process.h"
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#include "lldb/lldb-private.h"
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#include "RenderScriptRuntime.h"
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#include "RenderScriptx86ABIFixups.h"
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// RenderScriptRuntimeModulePass is a simple llvm::ModulesPass that is used during expression evaluation to apply
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// RenderScript-specific fixes for expression evaluation.
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// In particular this is used to make expression IR conformant with the ABI generated by the slang frontend. This
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// ModulePass is executed in ClangExpressionParser::PrepareForExecution whenever an expression's DWARF language is
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// eLanguageTypeExtRenderscript
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class RenderScriptRuntimeModulePass : public llvm::ModulePass
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{
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public:
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static char ID;
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RenderScriptRuntimeModulePass(const lldb_private::Process *process) : ModulePass(ID), m_process_ptr(process) {}
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bool
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runOnModule(llvm::Module &module);
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private:
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const lldb_private::Process *m_process_ptr;
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};
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namespace lldb_private
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{
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namespace lldb_renderscript
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{
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struct RSIRPasses : public lldb_private::LLVMUserExpression::IRPasses
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{
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RSIRPasses(lldb_private::Process *process);
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~RSIRPasses();
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};
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} // namespace lldb_renderscript
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} // namespace lldb_private
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#endif
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