llvm-project/compiler-rt/lib/orc/debug.cpp

84 lines
2.2 KiB
C++

//===- debug.cpp ----------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of the ORC runtime support library.
//
//===----------------------------------------------------------------------===//
#include "debug.h"
#include <cassert>
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <cstring>
namespace __orc_rt {
#ifndef NDEBUG
std::atomic<const char *> DebugTypes;
char DebugTypesAll;
char DebugTypesNone;
/// Sets the DebugState and DebugTypes values -- this function may be called
/// concurrently on multiple threads, but will always assign the same values so
/// this should be safe.
const char *initializeDebug() {
if (const char *DT = getenv("ORC_RT_DEBUG")) {
// If ORC_RT_DEBUG=1 then log everything.
if (strcmp(DT, "1") == 0) {
DebugTypes.store(&DebugTypesAll, std::memory_order_relaxed);
return &DebugTypesAll;
}
// If ORC_RT_DEBUG is non-empty then record the string for use in
// debugTypeEnabled.
if (strcmp(DT, "") != 0) {
DebugTypes.store(DT, std::memory_order_relaxed);
return DT;
}
}
// If ORT_RT_DEBUG is undefined or defined as empty then log nothing.
DebugTypes.store(&DebugTypesNone, std::memory_order_relaxed);
return &DebugTypesNone;
}
bool debugTypeEnabled(const char *Type, const char *Types) {
assert(Types && Types != &DebugTypesAll && Types != &DebugTypesNone &&
"Invalid Types value");
size_t TypeLen = strlen(Type);
const char *Start = Types;
const char *End = Start;
do {
if (*End == '\0' || *End == ',') {
size_t ItemLen = End - Start;
if (ItemLen == TypeLen && memcmp(Type, Start, TypeLen) == 0)
return true;
if (*End == '\0')
return false;
Start = End + 1;
}
++End;
} while (true);
}
void printdbg(const char *format, ...) {
va_list Args;
va_start(Args, format);
vfprintf(stderr, format, Args);
va_end(Args);
}
#endif // !NDEBUG
} // end namespace __orc_rt