forked from OSchip/llvm-project
170 lines
5.3 KiB
C++
170 lines
5.3 KiB
C++
//===-- sanitizer_suppressions.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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//
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// Suppression parsing/matching code.
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//
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//===----------------------------------------------------------------------===//
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#include "sanitizer_suppressions.h"
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#include "sanitizer_allocator_internal.h"
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#include "sanitizer_common.h"
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#include "sanitizer_flags.h"
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#include "sanitizer_file.h"
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#include "sanitizer_libc.h"
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#include "sanitizer_placement_new.h"
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namespace __sanitizer {
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SuppressionContext::SuppressionContext(const char *suppression_types[],
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int suppression_types_num)
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: suppression_types_(suppression_types),
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suppression_types_num_(suppression_types_num), suppressions_(1),
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can_parse_(true) {
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CHECK_LE(suppression_types_num_, kMaxSuppressionTypes);
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internal_memset(has_suppression_type_, 0, suppression_types_num_);
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}
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static bool GetPathAssumingFileIsRelativeToExec(const char *file_path,
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/*out*/char *new_file_path,
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uptr new_file_path_size) {
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InternalScopedString exec(kMaxPathLength);
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if (ReadBinaryNameCached(exec.data(), exec.size())) {
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const char *file_name_pos = StripModuleName(exec.data());
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uptr path_to_exec_len = file_name_pos - exec.data();
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internal_strncat(new_file_path, exec.data(),
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Min(path_to_exec_len, new_file_path_size - 1));
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internal_strncat(new_file_path, file_path,
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new_file_path_size - internal_strlen(new_file_path) - 1);
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return true;
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}
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return false;
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}
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void SuppressionContext::ParseFromFile(const char *filename) {
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if (filename[0] == '\0')
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return;
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// If we cannot find the file, check if its location is relative to
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// the location of the executable.
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InternalScopedString new_file_path(kMaxPathLength);
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if (!FileExists(filename) && !IsAbsolutePath(filename) &&
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GetPathAssumingFileIsRelativeToExec(filename, new_file_path.data(),
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new_file_path.size())) {
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filename = new_file_path.data();
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}
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// Read the file.
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VPrintf(1, "%s: reading suppressions file at %s\n",
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SanitizerToolName, filename);
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char *file_contents;
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uptr buffer_size;
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uptr contents_size;
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if (!ReadFileToBuffer(filename, &file_contents, &buffer_size,
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&contents_size)) {
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Printf("%s: failed to read suppressions file '%s'\n", SanitizerToolName,
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filename);
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Die();
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}
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Parse(file_contents);
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}
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bool SuppressionContext::Match(const char *str, const char *type,
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Suppression **s) {
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can_parse_ = false;
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if (!HasSuppressionType(type))
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return false;
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for (uptr i = 0; i < suppressions_.size(); i++) {
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Suppression &cur = suppressions_[i];
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if (0 == internal_strcmp(cur.type, type) && TemplateMatch(cur.templ, str)) {
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*s = &cur;
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return true;
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}
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}
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return false;
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}
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static const char *StripPrefix(const char *str, const char *prefix) {
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while (str && *str == *prefix) {
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str++;
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prefix++;
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}
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if (!*prefix)
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return str;
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return 0;
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}
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void SuppressionContext::Parse(const char *str) {
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// Context must not mutate once Match has been called.
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CHECK(can_parse_);
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const char *line = str;
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while (line) {
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while (line[0] == ' ' || line[0] == '\t')
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line++;
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const char *end = internal_strchr(line, '\n');
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if (end == 0)
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end = line + internal_strlen(line);
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if (line != end && line[0] != '#') {
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const char *end2 = end;
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while (line != end2 &&
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(end2[-1] == ' ' || end2[-1] == '\t' || end2[-1] == '\r'))
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end2--;
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int type;
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for (type = 0; type < suppression_types_num_; type++) {
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const char *next_char = StripPrefix(line, suppression_types_[type]);
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if (next_char && *next_char == ':') {
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line = ++next_char;
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break;
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}
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}
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if (type == suppression_types_num_) {
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Printf("%s: failed to parse suppressions\n", SanitizerToolName);
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Die();
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}
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Suppression s;
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s.type = suppression_types_[type];
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s.templ = (char*)InternalAlloc(end2 - line + 1);
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internal_memcpy(s.templ, line, end2 - line);
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s.templ[end2 - line] = 0;
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suppressions_.push_back(s);
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has_suppression_type_[type] = true;
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}
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if (end[0] == 0)
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break;
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line = end + 1;
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}
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}
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uptr SuppressionContext::SuppressionCount() const {
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return suppressions_.size();
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}
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bool SuppressionContext::HasSuppressionType(const char *type) const {
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for (int i = 0; i < suppression_types_num_; i++) {
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if (0 == internal_strcmp(type, suppression_types_[i]))
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return has_suppression_type_[i];
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}
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return false;
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}
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const Suppression *SuppressionContext::SuppressionAt(uptr i) const {
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CHECK_LT(i, suppressions_.size());
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return &suppressions_[i];
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}
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void SuppressionContext::GetMatched(
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InternalMmapVector<Suppression *> *matched) {
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for (uptr i = 0; i < suppressions_.size(); i++)
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if (atomic_load_relaxed(&suppressions_[i].hit_count))
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matched->push_back(&suppressions_[i]);
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}
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} // namespace __sanitizer
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