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//===-- sanitizer_suppressions.cc -----------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Suppression parsing/matching code.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_suppressions.h"
#include "sanitizer_allocator_internal.h"
#include "sanitizer_common.h"
#include "sanitizer_flags.h"
#include "sanitizer_libc.h"
#include "sanitizer_placement_new.h"
namespace __sanitizer {
SuppressionContext::SuppressionContext(const char *suppression_types[],
int suppression_types_num)
: suppression_types_(suppression_types),
suppression_types_num_(suppression_types_num), suppressions_(1),
can_parse_(true) {
CHECK_LE(suppression_types_num_, kMaxSuppressionTypes);
internal_memset(has_suppression_type_, 0, suppression_types_num_);
}
void SuppressionContext::ParseFromFile(const char *filename) {
if (filename[0] == '\0')
return;
char *file_contents;
uptr buffer_size;
uptr contents_size = ReadFileToBuffer(filename, &file_contents, &buffer_size,
1 << 26 /* max_len */);
if (contents_size == 0) {
Printf("%s: failed to read suppressions file '%s'\n", SanitizerToolName,
filename);
Die();
}
Parse(file_contents);
}
bool SuppressionContext::Match(const char *str, const char *type,
Suppression **s) {
can_parse_ = false;
if (!HasSuppressionType(type))
return false;
for (uptr i = 0; i < suppressions_.size(); i++) {
Suppression &cur = suppressions_[i];
if (0 == internal_strcmp(cur.type, type) && TemplateMatch(cur.templ, str)) {
*s = &cur;
return true;
}
}
return false;
}
static const char *StripPrefix(const char *str, const char *prefix) {
while (str && *str == *prefix) {
str++;
prefix++;
}
if (!*prefix)
return str;
return 0;
}
void SuppressionContext::Parse(const char *str) {
// Context must not mutate once Match has been called.
CHECK(can_parse_);
const char *line = str;
while (line) {
while (line[0] == ' ' || line[0] == '\t')
line++;
const char *end = internal_strchr(line, '\n');
if (end == 0)
end = line + internal_strlen(line);
if (line != end && line[0] != '#') {
const char *end2 = end;
while (line != end2 && (end2[-1] == ' ' || end2[-1] == '\t'))
end2--;
int type;
for (type = 0; type < suppression_types_num_; type++) {
const char *next_char = StripPrefix(line, suppression_types_[type]);
if (next_char && *next_char == ':') {
line = ++next_char;
break;
}
}
if (type == suppression_types_num_) {
Printf("%s: failed to parse suppressions\n", SanitizerToolName);
Die();
}
Suppression s;
s.type = suppression_types_[type];
s.templ = (char*)InternalAlloc(end2 - line + 1);
internal_memcpy(s.templ, line, end2 - line);
s.templ[end2 - line] = 0;
s.hit_count = 0;
s.weight = 0;
suppressions_.push_back(s);
has_suppression_type_[type] = true;
}
if (end[0] == 0)
break;
line = end + 1;
}
}
uptr SuppressionContext::SuppressionCount() const {
return suppressions_.size();
}
bool SuppressionContext::HasSuppressionType(const char *type) const {
for (int i = 0; i < suppression_types_num_; i++) {
if (0 == internal_strcmp(type, suppression_types_[i]))
return has_suppression_type_[i];
}
return false;
}
const Suppression *SuppressionContext::SuppressionAt(uptr i) const {
CHECK_LT(i, suppressions_.size());
return &suppressions_[i];
}
void SuppressionContext::GetMatched(
InternalMmapVector<Suppression *> *matched) {
for (uptr i = 0; i < suppressions_.size(); i++)
if (suppressions_[i].hit_count)
matched->push_back(&suppressions_[i]);
}
} // namespace __sanitizer
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