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//===-- ErrorHandling.cpp -------------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "klee/Support/ErrorHandling.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/CommandLine.h"
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <string.h>
#include <set>
using namespace klee;
using namespace llvm;
FILE *klee::klee_warning_file = NULL;
FILE *klee::klee_message_file = NULL;
static const char *warningPrefix = "WARNING";
static const char *warningOncePrefix = "WARNING ONCE";
static const char *errorPrefix = "ERROR";
static const char *notePrefix = "NOTE";
namespace {
cl::OptionCategory MiscCat("Miscellaneous options", "");
cl::opt<bool> WarningsOnlyToFile(
"warnings-only-to-file", cl::init(false),
cl::desc("All warnings will be written to warnings.txt only. If disabled, "
"they are also written on screen."),
cl::cat(MiscCat));
} // namespace
static bool shouldSetColor(const char *pfx, const char *msg,
const char *prefixToSearchFor) {
if (pfx && strcmp(pfx, prefixToSearchFor) == 0)
return true;
if (llvm::StringRef(msg).startswith(prefixToSearchFor))
return true;
return false;
}
static void klee_vfmessage(FILE *fp, const char *pfx, const char *msg,
va_list ap) {
if (!fp)
return;
llvm::raw_fd_ostream fdos(fileno(fp), /*shouldClose=*/false,
/*unbuffered=*/true);
bool modifyConsoleColor = fdos.is_displayed() && (fp == stderr);
if (modifyConsoleColor) {
// Warnings
if (shouldSetColor(pfx, msg, warningPrefix))
fdos.changeColor(llvm::raw_ostream::MAGENTA,
/*bold=*/false,
/*bg=*/false);
// Once warning
if (shouldSetColor(pfx, msg, warningOncePrefix))
fdos.changeColor(llvm::raw_ostream::MAGENTA,
/*bold=*/true,
/*bg=*/false);
// Errors
if (shouldSetColor(pfx, msg, errorPrefix))
fdos.changeColor(llvm::raw_ostream::RED,
/*bold=*/true,
/*bg=*/false);
// Notes
if (shouldSetColor(pfx, msg, notePrefix))
fdos.changeColor(llvm::raw_ostream::WHITE,
/*bold=*/true,
/*bg=*/false);
}
fdos << "KLEE: ";
if (pfx)
fdos << pfx << ": ";
// FIXME: Can't use fdos here because we need to print
// a variable number of arguments and do substitution
vfprintf(fp, msg, ap);
fflush(fp);
fdos << "\n";
if (modifyConsoleColor)
fdos.resetColor();
fdos.flush();
}
/* Prints a message/warning.
If pfx is NULL, this is a regular message, and it's sent to
klee_message_file (messages.txt). Otherwise, it is sent to
klee_warning_file (warnings.txt).
Iff onlyToFile is false, the message is also printed on stderr.
*/
static void klee_vmessage(const char *pfx, bool onlyToFile, const char *msg,
va_list ap) {
if (!onlyToFile) {
va_list ap2;
va_copy(ap2, ap);
klee_vfmessage(stderr, pfx, msg, ap2);
va_end(ap2);
}
klee_vfmessage(pfx ? klee_warning_file : klee_message_file, pfx, msg, ap);
}
void klee::klee_message(const char *msg, ...) {
va_list ap;
va_start(ap, msg);
klee_vmessage(NULL, false, msg, ap);
va_end(ap);
}
/* Message to be written only to file */
void klee::klee_message_to_file(const char *msg, ...) {
va_list ap;
va_start(ap, msg);
klee_vmessage(NULL, true, msg, ap);
va_end(ap);
}
void klee::klee_error(const char *msg, ...) {
va_list ap;
va_start(ap, msg);
klee_vmessage(errorPrefix, false, msg, ap);
va_end(ap);
exit(1);
}
void klee::klee_warning(const char *msg, ...) {
va_list ap;
va_start(ap, msg);
klee_vmessage(warningPrefix, WarningsOnlyToFile, msg, ap);
va_end(ap);
}
/* Prints a warning once per message. */
void klee::klee_warning_once(const void *id, const char *msg, ...) {
static std::set<std::pair<const void *, const char *> > keys;
std::pair<const void *, const char *> key;
/* "calling external" messages contain the actual arguments with
which we called the external function, so we need to ignore them
when computing the key. */
if (strncmp(msg, "calling external", strlen("calling external")) != 0)
key = std::make_pair(id, msg);
else
key = std::make_pair(id, "calling external");
if (!keys.count(key)) {
keys.insert(key);
va_list ap;
va_start(ap, msg);
klee_vmessage(warningOncePrefix, WarningsOnlyToFile, msg, ap);
va_end(ap);
}
}
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