You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
487 lines
14 KiB
487 lines
14 KiB
4 months ago
|
//===-- sanitizer_common.cc -----------------------------------------------===//
|
||
|
|
//
|
||
|
|
// The LLVM Compiler Infrastructure
|
||
|
|
//
|
||
|
|
// This file is distributed under the University of Illinois Open Source
|
||
|
|
// License. See LICENSE.TXT for details.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// This file is shared between AddressSanitizer and ThreadSanitizer
|
||
|
|
// run-time libraries.
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#include "sanitizer_common.h"
|
||
|
|
#include "sanitizer_allocator_interface.h"
|
||
|
|
#include "sanitizer_allocator_internal.h"
|
||
|
|
#include "sanitizer_flags.h"
|
||
|
|
#include "sanitizer_libc.h"
|
||
|
|
#include "sanitizer_placement_new.h"
|
||
|
|
#include "sanitizer_stacktrace_printer.h"
|
||
|
|
#include "sanitizer_symbolizer.h"
|
||
|
|
|
||
|
|
namespace __sanitizer {
|
||
|
|
|
||
|
|
const char *SanitizerToolName = "SanitizerTool";
|
||
|
|
|
||
|
|
atomic_uint32_t current_verbosity;
|
||
|
|
uptr PageSizeCached;
|
||
|
|
|
||
|
|
StaticSpinMutex report_file_mu;
|
||
|
|
ReportFile report_file = {&report_file_mu, kStderrFd, "", "", 0};
|
||
|
|
|
||
|
|
void RawWrite(const char *buffer) {
|
||
|
|
report_file.Write(buffer, internal_strlen(buffer));
|
||
|
|
}
|
||
|
|
|
||
|
|
void ReportFile::ReopenIfNecessary() {
|
||
|
|
mu->CheckLocked();
|
||
|
|
if (fd == kStdoutFd || fd == kStderrFd) return;
|
||
|
|
|
||
|
|
uptr pid = internal_getpid();
|
||
|
|
// If in tracer, use the parent's file.
|
||
|
|
if (pid == stoptheworld_tracer_pid)
|
||
|
|
pid = stoptheworld_tracer_ppid;
|
||
|
|
if (fd != kInvalidFd) {
|
||
|
|
// If the report file is already opened by the current process,
|
||
|
|
// do nothing. Otherwise the report file was opened by the parent
|
||
|
|
// process, close it now.
|
||
|
|
if (fd_pid == pid)
|
||
|
|
return;
|
||
|
|
else
|
||
|
|
CloseFile(fd);
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *exe_name = GetProcessName();
|
||
|
|
if (common_flags()->log_exe_name && exe_name) {
|
||
|
|
internal_snprintf(full_path, kMaxPathLength, "%s.%s.%zu", path_prefix,
|
||
|
|
exe_name, pid);
|
||
|
|
} else {
|
||
|
|
internal_snprintf(full_path, kMaxPathLength, "%s.%zu", path_prefix, pid);
|
||
|
|
}
|
||
|
|
fd = OpenFile(full_path, WrOnly);
|
||
|
|
if (fd == kInvalidFd) {
|
||
|
|
const char *ErrorMsgPrefix = "ERROR: Can't open file: ";
|
||
|
|
WriteToFile(kStderrFd, ErrorMsgPrefix, internal_strlen(ErrorMsgPrefix));
|
||
|
|
WriteToFile(kStderrFd, full_path, internal_strlen(full_path));
|
||
|
|
Die();
|
||
|
|
}
|
||
|
|
fd_pid = pid;
|
||
|
|
}
|
||
|
|
|
||
|
|
void ReportFile::SetReportPath(const char *path) {
|
||
|
|
if (!path)
|
||
|
|
return;
|
||
|
|
uptr len = internal_strlen(path);
|
||
|
|
if (len > sizeof(path_prefix) - 100) {
|
||
|
|
Report("ERROR: Path is too long: %c%c%c%c%c%c%c%c...\n",
|
||
|
|
path[0], path[1], path[2], path[3],
|
||
|
|
path[4], path[5], path[6], path[7]);
|
||
|
|
Die();
|
||
|
|
}
|
||
|
|
|
||
|
|
SpinMutexLock l(mu);
|
||
|
|
if (fd != kStdoutFd && fd != kStderrFd && fd != kInvalidFd)
|
||
|
|
CloseFile(fd);
|
||
|
|
fd = kInvalidFd;
|
||
|
|
if (internal_strcmp(path, "stdout") == 0) {
|
||
|
|
fd = kStdoutFd;
|
||
|
|
} else if (internal_strcmp(path, "stderr") == 0) {
|
||
|
|
fd = kStderrFd;
|
||
|
|
} else {
|
||
|
|
internal_snprintf(path_prefix, kMaxPathLength, "%s", path);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// PID of the tracer task in StopTheWorld. It shares the address space with the
|
||
|
|
// main process, but has a different PID and thus requires special handling.
|
||
|
|
uptr stoptheworld_tracer_pid = 0;
|
||
|
|
// Cached pid of parent process - if the parent process dies, we want to keep
|
||
|
|
// writing to the same log file.
|
||
|
|
uptr stoptheworld_tracer_ppid = 0;
|
||
|
|
|
||
|
|
void NORETURN ReportMmapFailureAndDie(uptr size, const char *mem_type,
|
||
|
|
const char *mmap_type, error_t err,
|
||
|
|
bool raw_report) {
|
||
|
|
static int recursion_count;
|
||
|
|
if (raw_report || recursion_count) {
|
||
|
|
// If raw report is requested or we went into recursion, just die.
|
||
|
|
// The Report() and CHECK calls below may call mmap recursively and fail.
|
||
|
|
RawWrite("ERROR: Failed to mmap\n");
|
||
|
|
Die();
|
||
|
|
}
|
||
|
|
recursion_count++;
|
||
|
|
Report("ERROR: %s failed to "
|
||
|
|
"%s 0x%zx (%zd) bytes of %s (error code: %d)\n",
|
||
|
|
SanitizerToolName, mmap_type, size, size, mem_type, err);
|
||
|
|
#ifndef SANITIZER_GO
|
||
|
|
DumpProcessMap();
|
||
|
|
#endif
|
||
|
|
UNREACHABLE("unable to mmap");
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ReadFileToBuffer(const char *file_name, char **buff, uptr *buff_size,
|
||
|
|
uptr *read_len, uptr max_len, error_t *errno_p) {
|
||
|
|
uptr PageSize = GetPageSizeCached();
|
||
|
|
uptr kMinFileLen = PageSize;
|
||
|
|
*buff = nullptr;
|
||
|
|
*buff_size = 0;
|
||
|
|
*read_len = 0;
|
||
|
|
// The files we usually open are not seekable, so try different buffer sizes.
|
||
|
|
for (uptr size = kMinFileLen; size <= max_len; size *= 2) {
|
||
|
|
fd_t fd = OpenFile(file_name, RdOnly, errno_p);
|
||
|
|
if (fd == kInvalidFd) return false;
|
||
|
|
UnmapOrDie(*buff, *buff_size);
|
||
|
|
*buff = (char*)MmapOrDie(size, __func__);
|
||
|
|
*buff_size = size;
|
||
|
|
*read_len = 0;
|
||
|
|
// Read up to one page at a time.
|
||
|
|
bool reached_eof = false;
|
||
|
|
while (*read_len + PageSize <= size) {
|
||
|
|
uptr just_read;
|
||
|
|
if (!ReadFromFile(fd, *buff + *read_len, PageSize, &just_read, errno_p)) {
|
||
|
|
UnmapOrDie(*buff, *buff_size);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
if (just_read == 0) {
|
||
|
|
reached_eof = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
*read_len += just_read;
|
||
|
|
}
|
||
|
|
CloseFile(fd);
|
||
|
|
if (reached_eof) // We've read the whole file.
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
typedef bool UptrComparisonFunction(const uptr &a, const uptr &b);
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
static inline bool CompareLess(const T &a, const T &b) {
|
||
|
|
return a < b;
|
||
|
|
}
|
||
|
|
|
||
|
|
void SortArray(uptr *array, uptr size) {
|
||
|
|
InternalSort<uptr*, UptrComparisonFunction>(&array, size, CompareLess);
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *StripPathPrefix(const char *filepath,
|
||
|
|
const char *strip_path_prefix) {
|
||
|
|
if (!filepath) return nullptr;
|
||
|
|
if (!strip_path_prefix) return filepath;
|
||
|
|
const char *res = filepath;
|
||
|
|
if (const char *pos = internal_strstr(filepath, strip_path_prefix))
|
||
|
|
res = pos + internal_strlen(strip_path_prefix);
|
||
|
|
if (res[0] == '.' && res[1] == '/')
|
||
|
|
res += 2;
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *StripModuleName(const char *module) {
|
||
|
|
if (!module)
|
||
|
|
return nullptr;
|
||
|
|
if (SANITIZER_WINDOWS) {
|
||
|
|
// On Windows, both slash and backslash are possible.
|
||
|
|
// Pick the one that goes last.
|
||
|
|
if (const char *bslash_pos = internal_strrchr(module, '\\'))
|
||
|
|
return StripModuleName(bslash_pos + 1);
|
||
|
|
}
|
||
|
|
if (const char *slash_pos = internal_strrchr(module, '/')) {
|
||
|
|
return slash_pos + 1;
|
||
|
|
}
|
||
|
|
return module;
|
||
|
|
}
|
||
|
|
|
||
|
|
void ReportErrorSummary(const char *error_message) {
|
||
|
|
if (!common_flags()->print_summary)
|
||
|
|
return;
|
||
|
|
InternalScopedString buff(kMaxSummaryLength);
|
||
|
|
buff.append("SUMMARY: %s: %s", SanitizerToolName, error_message);
|
||
|
|
__sanitizer_report_error_summary(buff.data());
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef SANITIZER_GO
|
||
|
|
void ReportErrorSummary(const char *error_type, const AddressInfo &info) {
|
||
|
|
if (!common_flags()->print_summary)
|
||
|
|
return;
|
||
|
|
InternalScopedString buff(kMaxSummaryLength);
|
||
|
|
buff.append("%s ", error_type);
|
||
|
|
RenderFrame(&buff, "%L %F", 0, info, common_flags()->symbolize_vs_style,
|
||
|
|
common_flags()->strip_path_prefix);
|
||
|
|
ReportErrorSummary(buff.data());
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Removes the ANSI escape sequences from the input string (in-place).
|
||
|
|
void RemoveANSIEscapeSequencesFromString(char *str) {
|
||
|
|
if (!str)
|
||
|
|
return;
|
||
|
|
|
||
|
|
// We are going to remove the escape sequences in place.
|
||
|
|
char *s = str;
|
||
|
|
char *z = str;
|
||
|
|
while (*s != '\0') {
|
||
|
|
CHECK_GE(s, z);
|
||
|
|
// Skip over ANSI escape sequences with pointer 's'.
|
||
|
|
if (*s == '\033' && *(s + 1) == '[') {
|
||
|
|
s = internal_strchrnul(s, 'm');
|
||
|
|
if (*s == '\0') {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
s++;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
// 's' now points at a character we want to keep. Copy over the buffer
|
||
|
|
// content if the escape sequence has been perviously skipped andadvance
|
||
|
|
// both pointers.
|
||
|
|
if (s != z)
|
||
|
|
*z = *s;
|
||
|
|
|
||
|
|
// If we have not seen an escape sequence, just advance both pointers.
|
||
|
|
z++;
|
||
|
|
s++;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Null terminate the string.
|
||
|
|
*z = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
void LoadedModule::set(const char *module_name, uptr base_address) {
|
||
|
|
clear();
|
||
|
|
full_name_ = internal_strdup(module_name);
|
||
|
|
base_address_ = base_address;
|
||
|
|
}
|
||
|
|
|
||
|
|
void LoadedModule::clear() {
|
||
|
|
InternalFree(full_name_);
|
||
|
|
full_name_ = nullptr;
|
||
|
|
while (!ranges_.empty()) {
|
||
|
|
AddressRange *r = ranges_.front();
|
||
|
|
ranges_.pop_front();
|
||
|
|
InternalFree(r);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void LoadedModule::addAddressRange(uptr beg, uptr end, bool executable) {
|
||
|
|
void *mem = InternalAlloc(sizeof(AddressRange));
|
||
|
|
AddressRange *r = new(mem) AddressRange(beg, end, executable);
|
||
|
|
ranges_.push_back(r);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool LoadedModule::containsAddress(uptr address) const {
|
||
|
|
for (const AddressRange &r : ranges()) {
|
||
|
|
if (r.beg <= address && address < r.end)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static atomic_uintptr_t g_total_mmaped;
|
||
|
|
|
||
|
|
void IncreaseTotalMmap(uptr size) {
|
||
|
|
if (!common_flags()->mmap_limit_mb) return;
|
||
|
|
uptr total_mmaped =
|
||
|
|
atomic_fetch_add(&g_total_mmaped, size, memory_order_relaxed) + size;
|
||
|
|
// Since for now mmap_limit_mb is not a user-facing flag, just kill
|
||
|
|
// a program. Use RAW_CHECK to avoid extra mmaps in reporting.
|
||
|
|
RAW_CHECK((total_mmaped >> 20) < common_flags()->mmap_limit_mb);
|
||
|
|
}
|
||
|
|
|
||
|
|
void DecreaseTotalMmap(uptr size) {
|
||
|
|
if (!common_flags()->mmap_limit_mb) return;
|
||
|
|
atomic_fetch_sub(&g_total_mmaped, size, memory_order_relaxed);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool TemplateMatch(const char *templ, const char *str) {
|
||
|
|
if ((!str) || str[0] == 0)
|
||
|
|
return false;
|
||
|
|
bool start = false;
|
||
|
|
if (templ && templ[0] == '^') {
|
||
|
|
start = true;
|
||
|
|
templ++;
|
||
|
|
}
|
||
|
|
bool asterisk = false;
|
||
|
|
while (templ && templ[0]) {
|
||
|
|
if (templ[0] == '*') {
|
||
|
|
templ++;
|
||
|
|
start = false;
|
||
|
|
asterisk = true;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (templ[0] == '$')
|
||
|
|
return str[0] == 0 || asterisk;
|
||
|
|
if (str[0] == 0)
|
||
|
|
return false;
|
||
|
|
char *tpos = (char*)internal_strchr(templ, '*');
|
||
|
|
char *tpos1 = (char*)internal_strchr(templ, '$');
|
||
|
|
if ((!tpos) || (tpos1 && tpos1 < tpos))
|
||
|
|
tpos = tpos1;
|
||
|
|
if (tpos)
|
||
|
|
tpos[0] = 0;
|
||
|
|
const char *str0 = str;
|
||
|
|
const char *spos = internal_strstr(str, templ);
|
||
|
|
str = spos + internal_strlen(templ);
|
||
|
|
templ = tpos;
|
||
|
|
if (tpos)
|
||
|
|
tpos[0] = tpos == tpos1 ? '$' : '*';
|
||
|
|
if (!spos)
|
||
|
|
return false;
|
||
|
|
if (start && spos != str0)
|
||
|
|
return false;
|
||
|
|
start = false;
|
||
|
|
asterisk = false;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const char kPathSeparator = SANITIZER_WINDOWS ? ';' : ':';
|
||
|
|
|
||
|
|
char *FindPathToBinary(const char *name) {
|
||
|
|
if (FileExists(name)) {
|
||
|
|
return internal_strdup(name);
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *path = GetEnv("PATH");
|
||
|
|
if (!path)
|
||
|
|
return nullptr;
|
||
|
|
uptr name_len = internal_strlen(name);
|
||
|
|
InternalScopedBuffer<char> buffer(kMaxPathLength);
|
||
|
|
const char *beg = path;
|
||
|
|
while (true) {
|
||
|
|
const char *end = internal_strchrnul(beg, kPathSeparator);
|
||
|
|
uptr prefix_len = end - beg;
|
||
|
|
if (prefix_len + name_len + 2 <= kMaxPathLength) {
|
||
|
|
internal_memcpy(buffer.data(), beg, prefix_len);
|
||
|
|
buffer[prefix_len] = '/';
|
||
|
|
internal_memcpy(&buffer[prefix_len + 1], name, name_len);
|
||
|
|
buffer[prefix_len + 1 + name_len] = '\0';
|
||
|
|
if (FileExists(buffer.data()))
|
||
|
|
return internal_strdup(buffer.data());
|
||
|
|
}
|
||
|
|
if (*end == '\0') break;
|
||
|
|
beg = end + 1;
|
||
|
|
}
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static char binary_name_cache_str[kMaxPathLength];
|
||
|
|
static char process_name_cache_str[kMaxPathLength];
|
||
|
|
|
||
|
|
const char *GetProcessName() {
|
||
|
|
return process_name_cache_str;
|
||
|
|
}
|
||
|
|
|
||
|
|
static uptr ReadProcessName(/*out*/ char *buf, uptr buf_len) {
|
||
|
|
ReadLongProcessName(buf, buf_len);
|
||
|
|
char *s = const_cast<char *>(StripModuleName(buf));
|
||
|
|
uptr len = internal_strlen(s);
|
||
|
|
if (s != buf) {
|
||
|
|
internal_memmove(buf, s, len);
|
||
|
|
buf[len] = '\0';
|
||
|
|
}
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
void UpdateProcessName() {
|
||
|
|
ReadProcessName(process_name_cache_str, sizeof(process_name_cache_str));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call once to make sure that binary_name_cache_str is initialized
|
||
|
|
void CacheBinaryName() {
|
||
|
|
if (binary_name_cache_str[0] != '\0')
|
||
|
|
return;
|
||
|
|
ReadBinaryName(binary_name_cache_str, sizeof(binary_name_cache_str));
|
||
|
|
ReadProcessName(process_name_cache_str, sizeof(process_name_cache_str));
|
||
|
|
}
|
||
|
|
|
||
|
|
uptr ReadBinaryNameCached(/*out*/char *buf, uptr buf_len) {
|
||
|
|
CacheBinaryName();
|
||
|
|
uptr name_len = internal_strlen(binary_name_cache_str);
|
||
|
|
name_len = (name_len < buf_len - 1) ? name_len : buf_len - 1;
|
||
|
|
if (buf_len == 0)
|
||
|
|
return 0;
|
||
|
|
internal_memcpy(buf, binary_name_cache_str, name_len);
|
||
|
|
buf[name_len] = '\0';
|
||
|
|
return name_len;
|
||
|
|
}
|
||
|
|
|
||
|
|
void PrintCmdline() {
|
||
|
|
char **argv = GetArgv();
|
||
|
|
if (!argv) return;
|
||
|
|
Printf("\nCommand: ");
|
||
|
|
for (uptr i = 0; argv[i]; ++i)
|
||
|
|
Printf("%s ", argv[i]);
|
||
|
|
Printf("\n\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
// Malloc hooks.
|
||
|
|
static const int kMaxMallocFreeHooks = 5;
|
||
|
|
struct MallocFreeHook {
|
||
|
|
void (*malloc_hook)(const void *, uptr);
|
||
|
|
void (*free_hook)(const void *);
|
||
|
|
};
|
||
|
|
|
||
|
|
static MallocFreeHook MFHooks[kMaxMallocFreeHooks];
|
||
|
|
|
||
|
|
void RunMallocHooks(const void *ptr, uptr size) {
|
||
|
|
for (int i = 0; i < kMaxMallocFreeHooks; i++) {
|
||
|
|
auto hook = MFHooks[i].malloc_hook;
|
||
|
|
if (!hook) return;
|
||
|
|
hook(ptr, size);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void RunFreeHooks(const void *ptr) {
|
||
|
|
for (int i = 0; i < kMaxMallocFreeHooks; i++) {
|
||
|
|
auto hook = MFHooks[i].free_hook;
|
||
|
|
if (!hook) return;
|
||
|
|
hook(ptr);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int InstallMallocFreeHooks(void (*malloc_hook)(const void *, uptr),
|
||
|
|
void (*free_hook)(const void *)) {
|
||
|
|
if (!malloc_hook || !free_hook) return 0;
|
||
|
|
for (int i = 0; i < kMaxMallocFreeHooks; i++) {
|
||
|
|
if (MFHooks[i].malloc_hook == nullptr) {
|
||
|
|
MFHooks[i].malloc_hook = malloc_hook;
|
||
|
|
MFHooks[i].free_hook = free_hook;
|
||
|
|
return i + 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace __sanitizer
|
||
|
|
|
||
|
|
using namespace __sanitizer; // NOLINT
|
||
|
|
|
||
|
|
extern "C" {
|
||
|
|
void __sanitizer_set_report_path(const char *path) {
|
||
|
|
report_file.SetReportPath(path);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __sanitizer_set_report_fd(void *fd) {
|
||
|
|
report_file.fd = (fd_t)reinterpret_cast<uptr>(fd);
|
||
|
|
report_file.fd_pid = internal_getpid();
|
||
|
|
}
|
||
|
|
|
||
|
|
void __sanitizer_report_error_summary(const char *error_summary) {
|
||
|
|
Printf("%s\n", error_summary);
|
||
|
|
}
|
||
|
|
|
||
|
|
SANITIZER_INTERFACE_ATTRIBUTE
|
||
|
|
void __sanitizer_set_death_callback(void (*callback)(void)) {
|
||
|
|
SetUserDieCallback(callback);
|
||
|
|
}
|
||
|
|
|
||
|
|
SANITIZER_INTERFACE_ATTRIBUTE
|
||
|
|
int __sanitizer_install_malloc_and_free_hooks(void (*malloc_hook)(const void *,
|
||
|
|
uptr),
|
||
|
|
void (*free_hook)(const void *)) {
|
||
|
|
return InstallMallocFreeHooks(malloc_hook, free_hook);
|
||
|
|
}
|
||
|
|
} // extern "C"
|