forked from OSchip/llvm-project
131 lines
4.2 KiB
C++
131 lines
4.2 KiB
C++
//===-- sanitizer_libignore.cc --------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "sanitizer_platform.h"
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#if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC || \
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SANITIZER_NETBSD || SANITIZER_OPENBSD
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#include "sanitizer_libignore.h"
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#include "sanitizer_flags.h"
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#include "sanitizer_posix.h"
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#include "sanitizer_procmaps.h"
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namespace __sanitizer {
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LibIgnore::LibIgnore(LinkerInitialized) {
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}
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void LibIgnore::AddIgnoredLibrary(const char *name_templ) {
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BlockingMutexLock lock(&mutex_);
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if (count_ >= kMaxLibs) {
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Report("%s: too many ignored libraries (max: %d)\n", SanitizerToolName,
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kMaxLibs);
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Die();
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}
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Lib *lib = &libs_[count_++];
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lib->templ = internal_strdup(name_templ);
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lib->name = nullptr;
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lib->real_name = nullptr;
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lib->loaded = false;
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}
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void LibIgnore::OnLibraryLoaded(const char *name) {
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BlockingMutexLock lock(&mutex_);
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// Try to match suppressions with symlink target.
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InternalScopedString buf(kMaxPathLength);
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if (name && internal_readlink(name, buf.data(), buf.size() - 1) > 0 &&
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buf[0]) {
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for (uptr i = 0; i < count_; i++) {
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Lib *lib = &libs_[i];
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if (!lib->loaded && (!lib->real_name) &&
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TemplateMatch(lib->templ, name))
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lib->real_name = internal_strdup(buf.data());
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}
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}
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// Scan suppressions list and find newly loaded and unloaded libraries.
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ListOfModules modules;
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modules.init();
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for (uptr i = 0; i < count_; i++) {
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Lib *lib = &libs_[i];
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bool loaded = false;
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for (const auto &mod : modules) {
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for (const auto &range : mod.ranges()) {
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if (!range.executable)
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continue;
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if (!TemplateMatch(lib->templ, mod.full_name()) &&
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!(lib->real_name &&
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internal_strcmp(lib->real_name, mod.full_name()) == 0))
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continue;
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if (loaded) {
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Report("%s: called_from_lib suppression '%s' is matched against"
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" 2 libraries: '%s' and '%s'\n",
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SanitizerToolName, lib->templ, lib->name, mod.full_name());
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Die();
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}
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loaded = true;
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if (lib->loaded)
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continue;
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VReport(1,
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"Matched called_from_lib suppression '%s' against library"
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" '%s'\n",
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lib->templ, mod.full_name());
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lib->loaded = true;
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lib->name = internal_strdup(mod.full_name());
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const uptr idx =
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atomic_load(&ignored_ranges_count_, memory_order_relaxed);
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CHECK_LT(idx, ARRAY_SIZE(ignored_code_ranges_));
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ignored_code_ranges_[idx].begin = range.beg;
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ignored_code_ranges_[idx].end = range.end;
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atomic_store(&ignored_ranges_count_, idx + 1, memory_order_release);
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break;
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}
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}
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if (lib->loaded && !loaded) {
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Report("%s: library '%s' that was matched against called_from_lib"
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" suppression '%s' is unloaded\n",
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SanitizerToolName, lib->name, lib->templ);
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Die();
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}
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}
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// Track instrumented ranges.
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if (track_instrumented_libs_) {
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for (const auto &mod : modules) {
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if (!mod.instrumented())
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continue;
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for (const auto &range : mod.ranges()) {
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if (!range.executable)
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continue;
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if (IsPcInstrumented(range.beg) && IsPcInstrumented(range.end - 1))
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continue;
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VReport(1, "Adding instrumented range %p-%p from library '%s'\n",
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range.beg, range.end, mod.full_name());
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const uptr idx =
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atomic_load(&instrumented_ranges_count_, memory_order_relaxed);
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CHECK_LT(idx, ARRAY_SIZE(instrumented_code_ranges_));
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instrumented_code_ranges_[idx].begin = range.beg;
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instrumented_code_ranges_[idx].end = range.end;
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atomic_store(&instrumented_ranges_count_, idx + 1,
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memory_order_release);
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}
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}
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}
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}
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void LibIgnore::OnLibraryUnloaded() {
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OnLibraryLoaded(nullptr);
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}
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} // namespace __sanitizer
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#endif // SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC ||
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// SANITIZER_NETBSD
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