| //===-- sanitizer_libignore.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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "sanitizer_platform.h" |
| |
| #if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_APPLE || \ |
| SANITIZER_NETBSD |
| |
| #include "sanitizer_libignore.h" |
| #include "sanitizer_flags.h" |
| #include "sanitizer_posix.h" |
| #include "sanitizer_procmaps.h" |
| |
| namespace __sanitizer { |
| |
| LibIgnore::LibIgnore(LinkerInitialized) { |
| } |
| |
| void LibIgnore::AddIgnoredLibrary(const char *name_templ) { |
| Lock lock(&mutex_); |
| if (count_ >= kMaxLibs) { |
| Report("%s: too many ignored libraries (max: %zu)\n", SanitizerToolName, |
| kMaxLibs); |
| Die(); |
| } |
| Lib *lib = &libs_[count_++]; |
| lib->templ = internal_strdup(name_templ); |
| lib->name = nullptr; |
| lib->real_name = nullptr; |
| lib->range_id = kInvalidCodeRangeId; |
| } |
| |
| void LibIgnore::OnLibraryLoaded(const char *name) { |
| Lock lock(&mutex_); |
| // Try to match suppressions with symlink target. |
| InternalMmapVector<char> buf(kMaxPathLength); |
| if (name && internal_readlink(name, buf.data(), buf.size() - 1) > 0 && |
| buf[0]) { |
| for (uptr i = 0; i < count_; i++) { |
| Lib *lib = &libs_[i]; |
| if (!lib->loaded() && (!lib->real_name) && |
| TemplateMatch(lib->templ, name)) |
| lib->real_name = internal_strdup(buf.data()); |
| } |
| } |
| |
| // Scan suppressions list and find newly loaded and unloaded libraries. |
| ListOfModules modules; |
| modules.init(); |
| for (uptr i = 0; i < count_; i++) { |
| Lib *lib = &libs_[i]; |
| bool loaded = false; |
| for (const auto &mod : modules) { |
| for (const auto &range : mod.ranges()) { |
| if (!range.executable) |
| continue; |
| if (!TemplateMatch(lib->templ, mod.full_name()) && |
| !(lib->real_name && |
| internal_strcmp(lib->real_name, mod.full_name()) == 0)) |
| continue; |
| if (loaded) { |
| Report("%s: called_from_lib suppression '%s' is matched against" |
| " 2 libraries: '%s' and '%s'\n", |
| SanitizerToolName, lib->templ, lib->name, mod.full_name()); |
| Die(); |
| } |
| loaded = true; |
| if (lib->loaded()) |
| continue; |
| VReport(1, |
| "Matched called_from_lib suppression '%s' against library" |
| " '%s'\n", |
| lib->templ, mod.full_name()); |
| lib->name = internal_strdup(mod.full_name()); |
| const uptr idx = |
| atomic_load(&ignored_ranges_count_, memory_order_relaxed); |
| CHECK_LT(idx, ARRAY_SIZE(ignored_code_ranges_)); |
| ignored_code_ranges_[idx].OnLoad(range.beg, range.end); |
| // Record the index of the ignored range. |
| lib->range_id = idx; |
| atomic_store(&ignored_ranges_count_, idx + 1, memory_order_release); |
| break; |
| } |
| } |
| if (lib->loaded() && !loaded) { |
| VReport(1, |
| "%s: library '%s' that was matched against called_from_lib" |
| " suppression '%s' is unloaded\n", |
| SanitizerToolName, lib->name, lib->templ); |
| // The library is unloaded so mark the ignored code range as unloaded. |
| ignored_code_ranges_[lib->range_id].OnUnload(); |
| lib->range_id = kInvalidCodeRangeId; |
| } |
| } |
| |
| // Track instrumented ranges. |
| if (track_instrumented_libs_) { |
| for (const auto &mod : modules) { |
| if (!mod.instrumented()) |
| continue; |
| for (const auto &range : mod.ranges()) { |
| if (!range.executable) |
| continue; |
| if (IsPcInstrumented(range.beg) && IsPcInstrumented(range.end - 1)) |
| continue; |
| VReport(1, "Adding instrumented range %p-%p from library '%s'\n", |
| (void *)range.beg, (void *)range.end, mod.full_name()); |
| const uptr idx = |
| atomic_load(&instrumented_ranges_count_, memory_order_relaxed); |
| CHECK_LT(idx, ARRAY_SIZE(instrumented_code_ranges_)); |
| instrumented_code_ranges_[idx].OnLoad(range.beg, range.end); |
| atomic_store(&instrumented_ranges_count_, idx + 1, |
| memory_order_release); |
| } |
| } |
| } |
| } |
| |
| void LibIgnore::OnLibraryUnloaded() { |
| OnLibraryLoaded(nullptr); |
| } |
| |
| } // namespace __sanitizer |
| |
| #endif // SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_APPLE || |
| // SANITIZER_NETBSD |