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7a1fc2d33e
This patch converts code that has access to a LLVMContext to not take a diagnostic handler. This has a few advantages * It is easier to use a consistent diagnostic handler in a single program. * Less clutter since we are not passing a handler around. It does make it a bit awkward to implement some C APIs that return a diagnostic string. I will propose new versions of these APIs and deprecate the current ones. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@255571 91177308-0d34-0410-b5e6-96231b3b80d8
116 lines
4.4 KiB
C++
116 lines
4.4 KiB
C++
//===-- BitReader.cpp -----------------------------------------------------===//
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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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#include "llvm-c/BitReader.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/IR/DiagnosticPrinter.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstring>
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#include <string>
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using namespace llvm;
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/* Builds a module from the bitcode in the specified memory buffer, returning a
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reference to the module via the OutModule parameter. Returns 0 on success.
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Optionally returns a human-readable error message via OutMessage. */
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LLVMBool LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
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LLVMModuleRef *OutModule, char **OutMessage) {
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return LLVMParseBitcodeInContext(wrap(&getGlobalContext()), MemBuf, OutModule,
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OutMessage);
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}
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static void diagnosticHandler(const DiagnosticInfo &DI, void *C) {
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auto *Message = reinterpret_cast<std::string *>(C);
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raw_string_ostream Stream(*Message);
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DiagnosticPrinterRawOStream DP(Stream);
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DI.print(DP);
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}
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LLVMBool LLVMParseBitcodeInContext(LLVMContextRef ContextRef,
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LLVMMemoryBufferRef MemBuf,
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LLVMModuleRef *OutModule,
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char **OutMessage) {
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MemoryBufferRef Buf = unwrap(MemBuf)->getMemBufferRef();
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LLVMContext &Ctx = *unwrap(ContextRef);
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LLVMContext::DiagnosticHandlerTy OldDiagnosticHandler =
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Ctx.getDiagnosticHandler();
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void *OldDiagnosticContext = Ctx.getDiagnosticContext();
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std::string Message;
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Ctx.setDiagnosticHandler(diagnosticHandler, &Message, true);
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ErrorOr<std::unique_ptr<Module>> ModuleOrErr = parseBitcodeFile(Buf, Ctx);
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Ctx.setDiagnosticHandler(OldDiagnosticHandler, OldDiagnosticContext, true);
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if (ModuleOrErr.getError()) {
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if (OutMessage)
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*OutMessage = strdup(Message.c_str());
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*OutModule = wrap((Module*)nullptr);
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return 1;
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}
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*OutModule = wrap(ModuleOrErr.get().release());
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return 0;
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}
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/* Reads a module from the specified path, returning via the OutModule parameter
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a module provider which performs lazy deserialization. Returns 0 on success.
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Optionally returns a human-readable error message via OutMessage. */
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LLVMBool LLVMGetBitcodeModuleInContext(LLVMContextRef ContextRef,
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LLVMMemoryBufferRef MemBuf,
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LLVMModuleRef *OutM,
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char **OutMessage) {
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std::string Message;
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std::unique_ptr<MemoryBuffer> Owner(unwrap(MemBuf));
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ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
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getLazyBitcodeModule(std::move(Owner), *unwrap(ContextRef));
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Owner.release();
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if (std::error_code EC = ModuleOrErr.getError()) {
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*OutM = wrap((Module *)nullptr);
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if (OutMessage)
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*OutMessage = strdup(EC.message().c_str());
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return 1;
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}
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*OutM = wrap(ModuleOrErr.get().release());
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return 0;
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}
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LLVMBool LLVMGetBitcodeModule(LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
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char **OutMessage) {
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return LLVMGetBitcodeModuleInContext(LLVMGetGlobalContext(), MemBuf, OutM,
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OutMessage);
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}
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/* Deprecated: Use LLVMGetBitcodeModuleInContext instead. */
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LLVMBool LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,
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LLVMMemoryBufferRef MemBuf,
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LLVMModuleProviderRef *OutMP,
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char **OutMessage) {
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return LLVMGetBitcodeModuleInContext(ContextRef, MemBuf,
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reinterpret_cast<LLVMModuleRef*>(OutMP),
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OutMessage);
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}
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/* Deprecated: Use LLVMGetBitcodeModule instead. */
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LLVMBool LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
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LLVMModuleProviderRef *OutMP,
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char **OutMessage) {
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return LLVMGetBitcodeModuleProviderInContext(LLVMGetGlobalContext(), MemBuf,
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OutMP, OutMessage);
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}
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