Merge "Protect filename_cache with lock in ota fault"
diff --git a/otafault/Android.mk b/otafault/Android.mk
index 71c2c62..ec4cdb3 100644
--- a/otafault/Android.mk
+++ b/otafault/Android.mk
@@ -23,7 +23,12 @@
libbase \
liblog
-LOCAL_CFLAGS := -Werror
+LOCAL_CFLAGS := \
+ -Werror \
+ -Wthread-safety \
+ -Wthread-safety-negative \
+ -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS
+
LOCAL_SRC_FILES := config.cpp ota_io.cpp
LOCAL_MODULE_TAGS := eng
LOCAL_MODULE := libotafault
diff --git a/otafault/ota_io.cpp b/otafault/ota_io.cpp
index 3a89bb5..faae527 100644
--- a/otafault/ota_io.cpp
+++ b/otafault/ota_io.cpp
@@ -24,10 +24,13 @@
#include <map>
#include <memory>
+#include <mutex>
+#include <android-base/thread_annotations.h>
#include "config.h"
-static std::map<intptr_t, const char*> filename_cache;
+static std::mutex filename_mutex;
+static std::map<intptr_t, const char*> filename_cache GUARDED_BY(filename_mutex);
static std::string read_fault_file_name = "";
static std::string write_fault_file_name = "";
static std::string fsync_fault_file_name = "";
@@ -55,23 +58,28 @@
int ota_open(const char* path, int oflags) {
// Let the caller handle errors; we do not care if open succeeds or fails
int fd = open(path, oflags);
+ std::lock_guard<std::mutex> lock(filename_mutex);
filename_cache[fd] = path;
return fd;
}
int ota_open(const char* path, int oflags, mode_t mode) {
int fd = open(path, oflags, mode);
+ std::lock_guard<std::mutex> lock(filename_mutex);
filename_cache[fd] = path;
- return fd; }
+ return fd;
+}
FILE* ota_fopen(const char* path, const char* mode) {
FILE* fh = fopen(path, mode);
+ std::lock_guard<std::mutex> lock(filename_mutex);
filename_cache[(intptr_t)fh] = path;
return fh;
}
static int __ota_close(int fd) {
// descriptors can be reused, so make sure not to leave them in the cache
+ std::lock_guard<std::mutex> lock(filename_mutex);
filename_cache.erase(fd);
return close(fd);
}
@@ -85,6 +93,7 @@
}
static int __ota_fclose(FILE* fh) {
+ std::lock_guard<std::mutex> lock(filename_mutex);
filename_cache.erase(reinterpret_cast<intptr_t>(fh));
return fclose(fh);
}
@@ -99,6 +108,7 @@
size_t ota_fread(void* ptr, size_t size, size_t nitems, FILE* stream) {
if (should_fault_inject(OTAIO_READ)) {
+ std::lock_guard<std::mutex> lock(filename_mutex);
auto cached = filename_cache.find((intptr_t)stream);
const char* cached_path = cached->second;
if (cached != filename_cache.end() &&
@@ -119,6 +129,7 @@
ssize_t ota_read(int fd, void* buf, size_t nbyte) {
if (should_fault_inject(OTAIO_READ)) {
+ std::lock_guard<std::mutex> lock(filename_mutex);
auto cached = filename_cache.find(fd);
const char* cached_path = cached->second;
if (cached != filename_cache.end()
@@ -138,6 +149,7 @@
size_t ota_fwrite(const void* ptr, size_t size, size_t count, FILE* stream) {
if (should_fault_inject(OTAIO_WRITE)) {
+ std::lock_guard<std::mutex> lock(filename_mutex);
auto cached = filename_cache.find((intptr_t)stream);
const char* cached_path = cached->second;
if (cached != filename_cache.end() &&
@@ -157,6 +169,7 @@
ssize_t ota_write(int fd, const void* buf, size_t nbyte) {
if (should_fault_inject(OTAIO_WRITE)) {
+ std::lock_guard<std::mutex> lock(filename_mutex);
auto cached = filename_cache.find(fd);
const char* cached_path = cached->second;
if (cached != filename_cache.end() &&
@@ -176,6 +189,7 @@
int ota_fsync(int fd) {
if (should_fault_inject(OTAIO_FSYNC)) {
+ std::lock_guard<std::mutex> lock(filename_mutex);
auto cached = filename_cache.find(fd);
const char* cached_path = cached->second;
if (cached != filename_cache.end() &&
