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https://github.com/capstone-engine/llvm-capstone.git
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4624e83ce7
Allow clients of the llvm library to opt-in to one-shot SIGPIPE handling, instead of forcing them to undo llvm's SIGPIPE handler registration (which is brittle). The current behavior is preserved for all llvm-derived tools (except lldb) by means of a default-`true` flag in the InitLLVM constructor. This prevents "IO error" crashes in long-lived processes (lldb is the motivating example) which both a) load llvm as a dynamic library and b) *really* need to ignore SIGPIPE. As llvm signal handlers can be installed when calling into libclang (say, via RemoveFileOnSignal), thereby overriding a previous SIG_IGN for SIGPIPE, there is no clean way to opt-out of "exit-on-SIGPIPE" in the current model. Differential Revision: https://reviews.llvm.org/D70277
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
//===-- lldb-server.cpp -----------------------------------------*- 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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#include "SystemInitializerLLGS.h"
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#include "lldb/Initialization/SystemLifetimeManager.h"
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#include "lldb/lldb-private.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include <stdio.h>
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#include <stdlib.h>
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static llvm::ManagedStatic<lldb_private::SystemLifetimeManager>
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g_debugger_lifetime;
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static void display_usage(const char *progname) {
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fprintf(stderr, "Usage:\n"
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" %s v[ersion]\n"
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" %s g[dbserver] [options]\n"
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" %s p[latform] [options]\n"
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"Invoke subcommand for additional help\n",
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progname, progname, progname);
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exit(0);
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}
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// Forward declarations of subcommand main methods.
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int main_gdbserver(int argc, char *argv[]);
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int main_platform(int argc, char *argv[]);
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namespace llgs {
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static void initialize() {
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if (auto e = g_debugger_lifetime->Initialize(
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std::make_unique<SystemInitializerLLGS>(), nullptr))
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llvm::consumeError(std::move(e));
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}
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static void terminate_debugger() { g_debugger_lifetime->Terminate(); }
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} // namespace llgs
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// main
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int main(int argc, char *argv[]) {
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llvm::InitLLVM IL(argc, argv, /*InstallPipeSignalExitHandler=*/false);
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llvm::StringRef ToolName = argv[0];
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llvm::sys::PrintStackTraceOnErrorSignal(ToolName);
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llvm::PrettyStackTraceProgram X(argc, argv);
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int option_error = 0;
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const char *progname = argv[0];
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if (argc < 2) {
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display_usage(progname);
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exit(option_error);
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}
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switch (argv[1][0]) {
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case 'g':
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llgs::initialize();
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main_gdbserver(argc, argv);
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llgs::terminate_debugger();
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break;
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case 'p':
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llgs::initialize();
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main_platform(argc, argv);
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llgs::terminate_debugger();
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break;
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case 'v':
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fprintf(stderr, "%s\n", lldb_private::GetVersion());
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break;
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default:
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display_usage(progname);
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exit(option_error);
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}
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}
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