mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-05 15:21:43 +00:00
243 lines
8.9 KiB
C++
243 lines
8.9 KiB
C++
//===-- cc1_main.cpp - Clang CC1 Compiler Frontend ------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This is the entry point to the clang -cc1 functionality, which implements the
|
|
// core compiler functionality along with a number of additional tools for
|
|
// demonstration and testing purposes.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Option/Arg.h"
|
|
#include "clang/CodeGen/ObjectFilePCHContainerOperations.h"
|
|
#include "clang/Config/config.h"
|
|
#include "clang/Driver/DriverDiagnostic.h"
|
|
#include "clang/Driver/Options.h"
|
|
#include "clang/Frontend/CompilerInstance.h"
|
|
#include "clang/Frontend/CompilerInvocation.h"
|
|
#include "clang/Frontend/FrontendDiagnostic.h"
|
|
#include "clang/Frontend/TextDiagnosticBuffer.h"
|
|
#include "clang/Frontend/TextDiagnosticPrinter.h"
|
|
#include "clang/Frontend/Utils.h"
|
|
#include "clang/FrontendTool/Utils.h"
|
|
#include "llvm/ADT/Statistic.h"
|
|
#include "llvm/LinkAllPasses.h"
|
|
#include "llvm/Option/ArgList.h"
|
|
#include "llvm/Option/OptTable.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/Signals.h"
|
|
#include "llvm/Support/TargetSelect.h"
|
|
#include "llvm/Support/Timer.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <cstdio>
|
|
|
|
#ifdef CLANG_HAVE_RLIMITS
|
|
#include <sys/resource.h>
|
|
#endif
|
|
|
|
// have no .a version in packages
|
|
#undef LINK_POLLY_INTO_TOOLS
|
|
|
|
using namespace clang;
|
|
using namespace llvm::opt;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Main driver
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static void LLVMErrorHandler(void *UserData, const std::string &Message,
|
|
bool GenCrashDiag) {
|
|
DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData);
|
|
|
|
Diags.Report(diag::err_fe_error_backend) << Message;
|
|
|
|
// Run the interrupt handlers to make sure any special cleanups get done, in
|
|
// particular that we remove files registered with RemoveFileOnSignal.
|
|
llvm::sys::RunInterruptHandlers();
|
|
|
|
// We cannot recover from llvm errors. When reporting a fatal error, exit
|
|
// with status 70 to generate crash diagnostics. For BSD systems this is
|
|
// defined as an internal software error. Otherwise, exit with status 1.
|
|
exit(GenCrashDiag ? 70 : 1);
|
|
}
|
|
|
|
#ifdef LINK_POLLY_INTO_TOOLS
|
|
namespace polly {
|
|
void initializePollyPasses(llvm::PassRegistry &Registry);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CLANG_HAVE_RLIMITS
|
|
// The amount of stack we think is "sufficient". If less than this much is
|
|
// available, we may be unable to reach our template instantiation depth
|
|
// limit and other similar limits.
|
|
// FIXME: Unify this with the stack we request when spawning a thread to build
|
|
// a module.
|
|
static const int kSufficientStack = 8 << 20;
|
|
|
|
#if defined(__linux__) && defined(__PIE__)
|
|
static size_t getCurrentStackAllocation() {
|
|
// If we can't compute the current stack usage, allow for 512K of command
|
|
// line arguments and environment.
|
|
size_t Usage = 512 * 1024;
|
|
if (FILE *StatFile = fopen("/proc/self/stat", "r")) {
|
|
// We assume that the stack extends from its current address to the end of
|
|
// the environment space. In reality, there is another string literal (the
|
|
// program name) after the environment, but this is close enough (we only
|
|
// need to be within 100K or so).
|
|
unsigned long StackPtr, EnvEnd;
|
|
// Disable silly GCC -Wformat warning that complains about length
|
|
// modifiers on ignored format specifiers. We want to retain these
|
|
// for documentation purposes even though they have no effect.
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wformat"
|
|
#endif
|
|
if (fscanf(StatFile,
|
|
"%*d %*s %*c %*d %*d %*d %*d %*d %*u %*lu %*lu %*lu %*lu %*lu "
|
|
"%*lu %*ld %*ld %*ld %*ld %*ld %*ld %*llu %*lu %*ld %*lu %*lu "
|
|
"%*lu %*lu %lu %*lu %*lu %*lu %*lu %*lu %*llu %*lu %*lu %*d %*d "
|
|
"%*u %*u %*llu %*lu %*ld %*lu %*lu %*lu %*lu %*lu %*lu %lu %*d",
|
|
&StackPtr, &EnvEnd) == 2) {
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
Usage = StackPtr < EnvEnd ? EnvEnd - StackPtr : StackPtr - EnvEnd;
|
|
}
|
|
fclose(StatFile);
|
|
}
|
|
return Usage;
|
|
}
|
|
|
|
#include <alloca.h>
|
|
|
|
LLVM_ATTRIBUTE_NOINLINE
|
|
static void ensureStackAddressSpace(int ExtraChunks = 0) {
|
|
// Linux kernels prior to 4.1 will sometimes locate the heap of a PIE binary
|
|
// relatively close to the stack (they are only guaranteed to be 128MiB
|
|
// apart). This results in crashes if we happen to heap-allocate more than
|
|
// 128MiB before we reach our stack high-water mark.
|
|
//
|
|
// To avoid these crashes, ensure that we have sufficient virtual memory
|
|
// pages allocated before we start running.
|
|
size_t Curr = getCurrentStackAllocation();
|
|
const int kTargetStack = kSufficientStack - 256 * 1024;
|
|
if (Curr < kTargetStack) {
|
|
volatile char *volatile Alloc =
|
|
static_cast<volatile char *>(alloca(kTargetStack - Curr));
|
|
Alloc[0] = 0;
|
|
Alloc[kTargetStack - Curr - 1] = 0;
|
|
}
|
|
}
|
|
#else
|
|
static void ensureStackAddressSpace() {}
|
|
#endif
|
|
|
|
/// Attempt to ensure that we have at least 8MiB of usable stack space.
|
|
static void ensureSufficientStack() {
|
|
struct rlimit rlim;
|
|
if (getrlimit(RLIMIT_STACK, &rlim) != 0)
|
|
return;
|
|
|
|
// Increase the soft stack limit to our desired level, if necessary and
|
|
// possible.
|
|
if (rlim.rlim_cur != RLIM_INFINITY && rlim.rlim_cur < kSufficientStack) {
|
|
// Try to allocate sufficient stack.
|
|
if (rlim.rlim_max == RLIM_INFINITY || rlim.rlim_max >= kSufficientStack)
|
|
rlim.rlim_cur = kSufficientStack;
|
|
else if (rlim.rlim_cur == rlim.rlim_max)
|
|
return;
|
|
else
|
|
rlim.rlim_cur = rlim.rlim_max;
|
|
|
|
if (setrlimit(RLIMIT_STACK, &rlim) != 0 ||
|
|
rlim.rlim_cur != kSufficientStack)
|
|
return;
|
|
}
|
|
|
|
// We should now have a stack of size at least kSufficientStack. Ensure
|
|
// that we can actually use that much, if necessary.
|
|
ensureStackAddressSpace();
|
|
}
|
|
#else
|
|
static void ensureSufficientStack() {}
|
|
#endif
|
|
|
|
int cc1_main(ArrayRef<const char *> Argv, const char *Argv0, void *MainAddr) {
|
|
ensureSufficientStack();
|
|
|
|
std::unique_ptr<CompilerInstance> Clang(new CompilerInstance());
|
|
IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
|
|
|
|
// Register the support for object-file-wrapped Clang modules.
|
|
auto PCHOps = Clang->getPCHContainerOperations();
|
|
PCHOps->registerWriter(llvm::make_unique<ObjectFilePCHContainerWriter>());
|
|
PCHOps->registerReader(llvm::make_unique<ObjectFilePCHContainerReader>());
|
|
|
|
// Initialize targets first, so that --version shows registered targets.
|
|
llvm::InitializeAllTargets();
|
|
llvm::InitializeAllTargetMCs();
|
|
llvm::InitializeAllAsmPrinters();
|
|
llvm::InitializeAllAsmParsers();
|
|
|
|
#ifdef LINK_POLLY_INTO_TOOLS
|
|
llvm::PassRegistry &Registry = *llvm::PassRegistry::getPassRegistry();
|
|
polly::initializePollyPasses(Registry);
|
|
#endif
|
|
|
|
// Buffer diagnostics from argument parsing so that we can output them using a
|
|
// well formed diagnostic object.
|
|
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
|
|
TextDiagnosticBuffer *DiagsBuffer = new TextDiagnosticBuffer;
|
|
DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagsBuffer);
|
|
bool Success = CompilerInvocation::CreateFromArgs(
|
|
Clang->getInvocation(), Argv.begin(), Argv.end(), Diags);
|
|
|
|
// Infer the builtin include path if unspecified.
|
|
if (Clang->getHeaderSearchOpts().UseBuiltinIncludes &&
|
|
Clang->getHeaderSearchOpts().ResourceDir.empty())
|
|
Clang->getHeaderSearchOpts().ResourceDir =
|
|
CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
|
|
|
|
// Create the actual diagnostics engine.
|
|
Clang->createDiagnostics();
|
|
if (!Clang->hasDiagnostics())
|
|
return 1;
|
|
|
|
// Set an error handler, so that any LLVM backend diagnostics go through our
|
|
// error handler.
|
|
llvm::install_fatal_error_handler(LLVMErrorHandler,
|
|
static_cast<void*>(&Clang->getDiagnostics()));
|
|
|
|
DiagsBuffer->FlushDiagnostics(Clang->getDiagnostics());
|
|
if (!Success)
|
|
return 1;
|
|
|
|
// Execute the frontend actions.
|
|
Success = ExecuteCompilerInvocation(Clang.get());
|
|
|
|
// If any timers were active but haven't been destroyed yet, print their
|
|
// results now. This happens in -disable-free mode.
|
|
llvm::TimerGroup::printAll(llvm::errs());
|
|
|
|
// Our error handler depends on the Diagnostics object, which we're
|
|
// potentially about to delete. Uninstall the handler now so that any
|
|
// later errors use the default handling behavior instead.
|
|
llvm::remove_fatal_error_handler();
|
|
|
|
// When running with -disable-free, don't do any destruction or shutdown.
|
|
if (Clang->getFrontendOpts().DisableFree) {
|
|
BuryPointer(std::move(Clang));
|
|
return !Success;
|
|
}
|
|
|
|
return !Success;
|
|
}
|