diff options
Diffstat (limited to 'lib/stats/stats_client.cpp')
-rw-r--r-- | lib/stats/stats_client.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/lib/stats/stats_client.cpp b/lib/stats/stats_client.cpp new file mode 100644 index 000000000000..52eab8eea079 --- /dev/null +++ b/lib/stats/stats_client.cpp @@ -0,0 +1,83 @@ +//===-- stats_client.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 +// +//===----------------------------------------------------------------------===// +// +// 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(); +} |