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//===-- ubsan_init.cc -----------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Initialization of UBSan runtime.
//
//===----------------------------------------------------------------------===//
#include "ubsan_platform.h"
#if CAN_SANITIZE_UB
#include "ubsan_diag.h"
#include "ubsan_init.h"
#include "ubsan_flags.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "sanitizer_common/sanitizer_mutex.h"
#include "sanitizer_common/sanitizer_symbolizer.h"
using namespace __ubsan;
static bool ubsan_inited;
void __ubsan::InitIfNecessary() {
#if !SANITIZER_CAN_USE_PREINIT_ARRAY
// No need to lock mutex if we're initializing from preinit array.
static StaticSpinMutex init_mu;
SpinMutexLock l(&init_mu);
#endif
if (LIKELY(ubsan_inited))
return;
bool standalone = false;
if (0 == internal_strcmp(SanitizerToolName, "SanitizerTool")) {
// WARNING: If this condition holds, then either UBSan runs in a standalone
// mode, or initializer for another sanitizer hasn't run yet. In a latter
// case, another sanitizer will overwrite "SanitizerToolName" and reparse
// common flags. It means, that we are not allowed to *use* common flags
// in this function.
SanitizerToolName = "UndefinedBehaviorSanitizer";
standalone = true;
}
// Initialize UBSan-specific flags.
InitializeFlags(standalone);
InitializeSuppressions();
InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
ubsan_inited = true;
}
#if SANITIZER_CAN_USE_PREINIT_ARRAY
__attribute__((section(".preinit_array"), used))
void (*__local_ubsan_preinit)(void) = __ubsan::InitIfNecessary;
#else
// Use a dynamic initializer.
class UbsanInitializer {
public:
UbsanInitializer() {
InitIfNecessary();
}
};
static UbsanInitializer ubsan_initializer;
#endif // SANITIZER_CAN_USE_PREINIT_ARRAY
#endif // CAN_SANITIZE_UB