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//===-- stats_client.cc ---------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Sanitizer statistics gathering. Manages statistics for a module (executable
// or DSO) and registers statistics with the process.
//
// This is linked into each individual modle and cannot directly use functions
// declared in sanitizer_common.
//
//===----------------------------------------------------------------------===//
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#include <dlfcn.h>
#endif
#include <stdint.h>
#include <stdio.h>
#include "sanitizer_common/sanitizer_internal_defs.h"
#include "stats/stats.h"
using namespace __sanitizer;
namespace {
void *LookupSymbolFromMain(const char *name) {
#ifdef _WIN32
return reinterpret_cast<void *>(GetProcAddress(GetModuleHandle(0), name));
#else
return dlsym(RTLD_DEFAULT, name);
#endif
}
StatModule *list;
struct RegisterSanStats {
unsigned module_id;
RegisterSanStats() {
typedef unsigned (*reg_func_t)(StatModule **);
reg_func_t reg_func = reinterpret_cast<reg_func_t>(
LookupSymbolFromMain("__sanitizer_stats_register"));
if (reg_func)
module_id = reg_func(&list);
}
~RegisterSanStats() {
typedef void (*unreg_func_t)(unsigned);
unreg_func_t unreg_func = reinterpret_cast<unreg_func_t>(
LookupSymbolFromMain("__sanitizer_stats_unregister"));
if (unreg_func)
unreg_func(module_id);
}
} reg;
}
extern "C" void __sanitizer_stat_init(StatModule *mod) {
mod->next = list;
list = mod;
}
extern "C" void __sanitizer_stat_report(StatInfo *s) {
s->addr = GET_CALLER_PC();
#if defined(_WIN64) && !defined(__clang__)
uptr old_data = InterlockedIncrement64(reinterpret_cast<LONG64 *>(&s->data));
#elif defined(_WIN32) && !defined(__clang__)
uptr old_data = InterlockedIncrement(&s->data);
#else
uptr old_data = __sync_fetch_and_add(&s->data, 1);
#endif
// Overflow check.
if (CountFromData(old_data + 1) == 0)
Trap();
}
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