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Diffstat (limited to 'libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc')
-rw-r--r--libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc120
1 files changed, 55 insertions, 65 deletions
diff --git a/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc b/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc
index ff69664e7b9..63e70660cf3 100644
--- a/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc
@@ -32,6 +32,7 @@
#include <pthread.h>
#include <signal.h>
#include <sys/resource.h>
+#include <syslog.h>
#if SANITIZER_FREEBSD
#include <pthread_np.h>
@@ -49,8 +50,6 @@
#if SANITIZER_ANDROID && __ANDROID_API__ < 21
#include <android/log.h>
-#else
-#include <syslog.h>
#endif
#if !SANITIZER_ANDROID
@@ -156,7 +155,6 @@ bool SanitizerGetThreadName(char *name, int max_len) {
#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO
static uptr g_tls_size;
-#endif
#ifdef __i386__
# define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
@@ -164,26 +162,7 @@ static uptr g_tls_size;
# define DL_INTERNAL_FUNCTION
#endif
-#if defined(__mips__) || defined(__powerpc64__)
-// TlsPreTcbSize includes size of struct pthread_descr and size of tcb
-// head structure. It lies before the static tls blocks.
-static uptr TlsPreTcbSize() {
-# if defined(__mips__)
- const uptr kTcbHead = 16; // sizeof (tcbhead_t)
-# elif defined(__powerpc64__)
- const uptr kTcbHead = 88; // sizeof (tcbhead_t)
-# endif
- const uptr kTlsAlign = 16;
- const uptr kTlsPreTcbSize =
- (ThreadDescriptorSize() + kTcbHead + kTlsAlign - 1) & ~(kTlsAlign - 1);
- InitTlsSize();
- g_tls_size = (g_tls_size + kTlsPreTcbSize + kTlsAlign -1) & ~(kTlsAlign - 1);
- return kTlsPreTcbSize;
-}
-#endif
-
void InitTlsSize() {
-#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO
// all current supported platforms have 16 bytes stack alignment
const size_t kStackAlign = 16;
typedef void (*get_tls_func)(size_t*, size_t*) DL_INTERNAL_FUNCTION;
@@ -199,11 +178,13 @@ void InitTlsSize() {
if (tls_align < kStackAlign)
tls_align = kStackAlign;
g_tls_size = RoundUpTo(tls_size, tls_align);
-#endif // !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO
}
+#else
+void InitTlsSize() { }
+#endif // !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO
#if (defined(__x86_64__) || defined(__i386__) || defined(__mips__) \
- || defined(__aarch64__) || defined(__powerpc64__)) \
+ || defined(__aarch64__) || defined(__powerpc64__) || defined(__s390__)) \
&& SANITIZER_LINUX && !SANITIZER_ANDROID
// sizeof(struct pthread) from glibc.
static atomic_uintptr_t kThreadDescriptorSize;
@@ -220,6 +201,11 @@ uptr ThreadDescriptorSize() {
char *end;
int minor = internal_simple_strtoll(buf + 8, &end, 10);
if (end != buf + 8 && (*end == '\0' || *end == '.')) {
+ int patch = 0;
+ if (*end == '.')
+ // strtoll will return 0 if no valid conversion could be performed
+ patch = internal_simple_strtoll(end + 1, nullptr, 10);
+
/* sizeof(struct pthread) values from various glibc versions. */
if (SANITIZER_X32)
val = 1728; // Assume only one particular version for x32.
@@ -233,9 +219,9 @@ uptr ThreadDescriptorSize() {
val = FIRST_32_SECOND_64(1136, 1712);
else if (minor == 10)
val = FIRST_32_SECOND_64(1168, 1776);
- else if (minor <= 12)
+ else if (minor == 11 || (minor == 12 && patch == 1))
val = FIRST_32_SECOND_64(1168, 2288);
- else if (minor == 13)
+ else if (minor <= 13)
val = FIRST_32_SECOND_64(1168, 2304);
else
val = FIRST_32_SECOND_64(1216, 2304);
@@ -260,6 +246,9 @@ uptr ThreadDescriptorSize() {
val = 1776; // from glibc.ppc64le 2.20-8.fc21
atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed);
return val;
+#elif defined(__s390__)
+ val = FIRST_32_SECOND_64(1152, 1776); // valid for glibc 2.22
+ atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed);
#endif
return 0;
}
@@ -271,6 +260,24 @@ uptr ThreadSelfOffset() {
return kThreadSelfOffset;
}
+#if defined(__mips__) || defined(__powerpc64__)
+// TlsPreTcbSize includes size of struct pthread_descr and size of tcb
+// head structure. It lies before the static tls blocks.
+static uptr TlsPreTcbSize() {
+# if defined(__mips__)
+ const uptr kTcbHead = 16; // sizeof (tcbhead_t)
+# elif defined(__powerpc64__)
+ const uptr kTcbHead = 88; // sizeof (tcbhead_t)
+# endif
+ const uptr kTlsAlign = 16;
+ const uptr kTlsPreTcbSize =
+ (ThreadDescriptorSize() + kTcbHead + kTlsAlign - 1) & ~(kTlsAlign - 1);
+ InitTlsSize();
+ g_tls_size = (g_tls_size + kTlsPreTcbSize + kTlsAlign -1) & ~(kTlsAlign - 1);
+ return kTlsPreTcbSize;
+}
+#endif
+
uptr ThreadSelf() {
uptr descr_addr;
# if defined(__i386__)
@@ -290,6 +297,9 @@ uptr ThreadSelf() {
.set pop" : "=r" (thread_pointer));
descr_addr = thread_pointer - kTlsTcbOffset - TlsPreTcbSize();
# elif defined(__aarch64__)
+ descr_addr = reinterpret_cast<uptr>(__builtin_thread_pointer()) -
+ ThreadDescriptorSize();
+# elif defined(__s390__)
descr_addr = reinterpret_cast<uptr>(__builtin_thread_pointer());
# elif defined(__powerpc64__)
// PPC64LE uses TLS variant I. The thread pointer (in GPR 13)
@@ -330,7 +340,7 @@ uptr ThreadSelf() {
#if !SANITIZER_GO
static void GetTls(uptr *addr, uptr *size) {
#if SANITIZER_LINUX && !SANITIZER_ANDROID
-# if defined(__x86_64__) || defined(__i386__)
+# if defined(__x86_64__) || defined(__i386__) || defined(__s390__)
*addr = ThreadSelf();
*size = GetTlsSize();
*addr -= *size;
@@ -410,17 +420,12 @@ typedef ElfW(Phdr) Elf_Phdr;
# endif
struct DlIteratePhdrData {
- LoadedModule *modules;
- uptr current_n;
+ InternalMmapVector<LoadedModule> *modules;
bool first;
- uptr max_n;
- string_predicate_t filter;
};
static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) {
DlIteratePhdrData *data = (DlIteratePhdrData*)arg;
- if (data->current_n == data->max_n)
- return 0;
InternalScopedString module_name(kMaxPathLength);
if (data->first) {
data->first = false;
@@ -431,20 +436,18 @@ static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) {
}
if (module_name[0] == '\0')
return 0;
- if (data->filter && !data->filter(module_name.data()))
- return 0;
- LoadedModule *cur_module = &data->modules[data->current_n];
- cur_module->set(module_name.data(), info->dlpi_addr);
- data->current_n++;
+ LoadedModule cur_module;
+ cur_module.set(module_name.data(), info->dlpi_addr);
for (int i = 0; i < info->dlpi_phnum; i++) {
const Elf_Phdr *phdr = &info->dlpi_phdr[i];
if (phdr->p_type == PT_LOAD) {
uptr cur_beg = info->dlpi_addr + phdr->p_vaddr;
uptr cur_end = cur_beg + phdr->p_memsz;
bool executable = phdr->p_flags & PF_X;
- cur_module->addAddressRange(cur_beg, cur_end, executable);
+ cur_module.addAddressRange(cur_beg, cur_end, executable);
}
}
+ data->modules->push_back(cur_module);
return 0;
}
@@ -453,8 +456,8 @@ extern "C" __attribute__((weak)) int dl_iterate_phdr(
int (*)(struct dl_phdr_info *, size_t, void *), void *);
#endif
-uptr GetListOfModules(LoadedModule *modules, uptr max_modules,
- string_predicate_t filter) {
+void ListOfModules::init() {
+ clear();
#if SANITIZER_ANDROID && __ANDROID_API__ <= 22
u32 api_level = AndroidGetApiLevel();
// Fall back to /proc/maps if dl_iterate_phdr is unavailable or broken.
@@ -462,13 +465,12 @@ uptr GetListOfModules(LoadedModule *modules, uptr max_modules,
// both K and L (and future) Android releases.
if (api_level <= ANDROID_LOLLIPOP_MR1) { // L or earlier
MemoryMappingLayout memory_mapping(false);
- return memory_mapping.DumpListOfModules(modules, max_modules, filter);
+ memory_mapping.DumpListOfModules(&modules_);
+ return;
}
#endif
- CHECK(modules);
- DlIteratePhdrData data = {modules, 0, true, max_modules, filter};
+ DlIteratePhdrData data = {&modules_, true};
dl_iterate_phdr(dl_iterate_phdr_cb, &data);
- return data.current_n;
}
// getrusage does not give us the current RSS, only the max RSS.
@@ -519,19 +521,20 @@ uptr GetRSS() {
static atomic_uint8_t android_log_initialized;
void AndroidLogInit() {
+ openlog(GetProcessName(), 0, LOG_USER);
atomic_store(&android_log_initialized, 1, memory_order_release);
}
-static bool IsSyslogAvailable() {
+static bool ShouldLogAfterPrintf() {
return atomic_load(&android_log_initialized, memory_order_acquire);
}
#else
void AndroidLogInit() {}
-static bool IsSyslogAvailable() { return true; }
+static bool ShouldLogAfterPrintf() { return true; }
#endif // SANITIZER_ANDROID
-static void WriteOneLineToSyslog(const char *s) {
+void WriteOneLineToSyslog(const char *s) {
#if SANITIZER_ANDROID &&__ANDROID_API__ < 21
__android_log_write(ANDROID_LOG_INFO, NULL, s);
#else
@@ -539,24 +542,11 @@ static void WriteOneLineToSyslog(const char *s) {
#endif
}
-void WriteToSyslog(const char *buffer) {
- if (!IsSyslogAvailable())
- return;
- char *copy = internal_strdup(buffer);
- char *p = copy;
- char *q;
- // syslog, at least on Android, has an implicit message length limit.
- // Print one line at a time.
- do {
- q = internal_strchr(p, '\n');
- if (q)
- *q = '\0';
- WriteOneLineToSyslog(p);
- if (q)
- p = q + 1;
- } while (q);
- InternalFree(copy);
+void LogMessageOnPrintf(const char *str) {
+ if (common_flags()->log_to_syslog && ShouldLogAfterPrintf())
+ WriteToSyslog(str);
}
+
#endif // SANITIZER_LINUX
} // namespace __sanitizer
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