2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
//===-- stats_client.cc ---------------------------------------------------===//
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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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//
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// Sanitizer statistics gathering. Manages statistics for a module (executable
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// or DSO) and registers statistics with the process.
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//
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// This is linked into each individual modle and cannot directly use functions
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// declared in sanitizer_common.
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//
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//===----------------------------------------------------------------------===//
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "stats/stats.h"
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using namespace __sanitizer;
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namespace {
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void *LookupSymbolFromMain(const char *name) {
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#ifdef _WIN32
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return reinterpret_cast<void *>(GetProcAddress(GetModuleHandle(0), name));
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#else
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return dlsym(RTLD_DEFAULT, name);
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#endif
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}
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StatModule *list;
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struct RegisterSanStats {
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unsigned module_id;
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RegisterSanStats() {
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typedef unsigned (*reg_func_t)(StatModule **);
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reg_func_t reg_func = reinterpret_cast<reg_func_t>(
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LookupSymbolFromMain("__sanitizer_stats_register"));
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if (reg_func)
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module_id = reg_func(&list);
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}
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~RegisterSanStats() {
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typedef void (*unreg_func_t)(unsigned);
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unreg_func_t unreg_func = reinterpret_cast<unreg_func_t>(
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LookupSymbolFromMain("__sanitizer_stats_unregister"));
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if (unreg_func)
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unreg_func(module_id);
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}
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} reg;
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}
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extern "C" void __sanitizer_stat_init(StatModule *mod) {
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mod->next = list;
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list = mod;
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}
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extern "C" void __sanitizer_stat_report(StatInfo *s) {
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s->addr = GET_CALLER_PC();
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#if defined(_WIN64) && !defined(__clang__)
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uptr old_data = InterlockedIncrement64(reinterpret_cast<LONG64 *>(&s->data));
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#elif defined(_WIN32) && !defined(__clang__)
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uptr old_data = InterlockedIncrement(&s->data);
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#else
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uptr old_data = __sync_fetch_and_add(&s->data, 1);
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#endif
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// Overflow check.
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if (CountFromData(old_data + 1) == 0)
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Trap();
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}
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