Adding upstream version 2.4.38.upstream/2.4.38upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 552 insertions, 0 deletions

diff --git a/modules/lua/lua_vmprep.c b/modules/lua/lua_vmprep.c
new file mode 100644
index 0000000..001897a
--- /dev/null
+++ b/modules/lua/lua_vmprep.c
@@ -0,0 +1,552 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "mod_lua.h"
+#include "http_log.h"
+#include "apr_uuid.h"
+#include "lua_config.h"
+#include "apr_file_info.h"
+#include "mod_auth.h"
+
+APLOG_USE_MODULE(lua);
+
+#ifndef AP_LUA_MODULE_EXT
+#if defined(NETWARE) 
+#define AP_LUA_MODULE_EXT ".nlm"
+#elif defined(WIN32)
+#define AP_LUA_MODULE_EXT ".dll"
+#elif (defined(__hpux__) || defined(__hpux)) && !defined(__ia64)
+#define AP_LUA_MODULE_EXT ".sl"
+#else
+#define AP_LUA_MODULE_EXT ".so"
+#endif
+#endif
+
+#if APR_HAS_THREADS
+    apr_thread_mutex_t *ap_lua_mutex;
+#endif
+extern apr_global_mutex_t *lua_ivm_mutex;
+    
+void ap_lua_init_mutex(apr_pool_t *pool, server_rec *s) 
+{
+    apr_status_t rv;
+    
+    /* global IVM mutex */
+    rv = apr_global_mutex_child_init(&lua_ivm_mutex,
+                                     apr_global_mutex_lockfile(lua_ivm_mutex),
+                                     pool);
+    if (rv != APR_SUCCESS) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(03016)
+                     "mod_lua: Failed to reopen mutex lua-ivm-shm in child");
+        exit(1); /* bah :( */
+    }
+    
+    /* Server pool mutex */
+#if APR_HAS_THREADS
+    apr_thread_mutex_create(&ap_lua_mutex, APR_THREAD_MUTEX_DEFAULT, pool);
+#endif
+}
+
+/* forward dec'l from this file */
+
+#if 0
+static void pstack_dump(lua_State *L, apr_pool_t *r, int level,
+                        const char *msg)
+{
+    int i;
+    int top = lua_gettop(L);
+
+    ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03211)
+                  "Lua Stack Dump: [%s]", msg);
+
+    for (i = 1; i <= top; i++) {
+        int t = lua_type(L, i);
+        switch (t) {
+        case LUA_TSTRING:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03212)
+                              "%d:  '%s'", i, lua_tostring(L, i));
+                break;
+            }
+        case LUA_TUSERDATA:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03213)
+                              "%d:  userdata", i);
+                break;
+            }
+        case LUA_TLIGHTUSERDATA:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03214)
+                              "%d:  lightuserdata", i);
+                break;
+            }
+        case LUA_TNIL:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03215)
+                              "%d:  NIL", i);
+                break;
+            }
+        case LUA_TNONE:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03216)
+                              "%d:  None", i);
+                break;
+            }
+        case LUA_TBOOLEAN:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03217)
+                              "%d:  %s",
+                              i, lua_toboolean(L, i) ? "true" : "false");
+                break;
+            }
+        case LUA_TNUMBER:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03218)
+                              "%d:  %g", i, lua_tonumber(L, i));
+                break;
+            }
+        case LUA_TTABLE:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03219)
+                              "%d:  <table>", i);
+                break;
+            }
+        case LUA_TTHREAD:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03220)
+                              "%d:  <thread>", i);
+                break;
+            }
+        case LUA_TFUNCTION:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03221)
+                              "%d:  <function>", i);
+                break;
+            }
+        default:{
+                ap_log_perror(APLOG_MARK, level, 0, r, APLOGNO(03222)
+                              "%d:  unknown: [%s]", i, lua_typename(L, i));
+                break;
+            }
+        }
+    }
+}
+#endif
+
+/* BEGIN modules*/
+
+/* BEGIN apache lmodule  */
+
+#define makeintegerfield(L, n) lua_pushinteger(L, n); lua_setfield(L, -2, #n)
+
+void ap_lua_load_apache2_lmodule(lua_State *L)
+{
+    lua_getglobal(L, "package");
+    lua_getfield(L, -1, "loaded");
+    lua_newtable(L);
+    lua_setfield(L, -2, "apache2");
+    lua_setglobal(L, "apache2");
+    lua_pop(L, 1);              /* empty stack */
+
+    lua_getglobal(L, "apache2");
+
+    lua_pushstring(L, ap_get_server_banner());
+    lua_setfield(L, -2, "version");
+
+    makeintegerfield(L, OK);
+    makeintegerfield(L, DECLINED);
+    makeintegerfield(L, DONE);
+    makeintegerfield(L, HTTP_MOVED_TEMPORARILY);
+    makeintegerfield(L, PROXYREQ_NONE);
+    makeintegerfield(L, PROXYREQ_PROXY);
+    makeintegerfield(L, PROXYREQ_REVERSE);
+    makeintegerfield(L, PROXYREQ_RESPONSE);
+    makeintegerfield(L, PROXYREQ_RESPONSE);
+    makeintegerfield(L, AUTHZ_DENIED);
+    makeintegerfield(L, AUTHZ_GRANTED);
+    makeintegerfield(L, AUTHZ_NEUTRAL);
+    makeintegerfield(L, AUTHZ_GENERAL_ERROR);
+    makeintegerfield(L, AUTHZ_DENIED_NO_USER);
+    
+    /*
+       makeintegerfield(L, HTTP_CONTINUE);
+       makeintegerfield(L, HTTP_SWITCHING_PROTOCOLS);
+       makeintegerfield(L, HTTP_PROCESSING);
+       makeintegerfield(L, HTTP_OK);
+       makeintegerfield(L, HTTP_CREATED);
+       makeintegerfield(L, HTTP_ACCEPTED);
+       makeintegerfield(L, HTTP_NON_AUTHORITATIVE);
+       makeintegerfield(L, HTTP_NO_CONTENT);
+       makeintegerfield(L, HTTP_RESET_CONTENT);
+       makeintegerfield(L, HTTP_PARTIAL_CONTENT);
+       makeintegerfield(L, HTTP_MULTI_STATUS);
+       makeintegerfield(L, HTTP_ALREADY_REPORTED);
+       makeintegerfield(L, HTTP_IM_USED);
+       makeintegerfield(L, HTTP_MULTIPLE_CHOICES);
+       makeintegerfield(L, HTTP_MOVED_PERMANENTLY);
+       makeintegerfield(L, HTTP_MOVED_TEMPORARILY);
+       makeintegerfield(L, HTTP_SEE_OTHER);
+       makeintegerfield(L, HTTP_NOT_MODIFIED);
+       makeintegerfield(L, HTTP_USE_PROXY);
+       makeintegerfield(L, HTTP_TEMPORARY_REDIRECT);
+       makeintegerfield(L, HTTP_PERMANENT_REDIRECT);
+       makeintegerfield(L, HTTP_BAD_REQUEST);
+       makeintegerfield(L, HTTP_UNAUTHORIZED);
+       makeintegerfield(L, HTTP_PAYMENT_REQUIRED);
+       makeintegerfield(L, HTTP_FORBIDDEN);
+       makeintegerfield(L, HTTP_NOT_FOUND);
+       makeintegerfield(L, HTTP_METHOD_NOT_ALLOWED);
+       makeintegerfield(L, HTTP_NOT_ACCEPTABLE);
+       makeintegerfield(L, HTTP_PROXY_AUTHENTICATION_REQUIRED);
+       makeintegerfield(L, HTTP_REQUEST_TIME_OUT);
+       makeintegerfield(L, HTTP_CONFLICT);
+       makeintegerfield(L, HTTP_GONE);
+       makeintegerfield(L, HTTP_LENGTH_REQUIRED);
+       makeintegerfield(L, HTTP_PRECONDITION_FAILED);
+       makeintegerfield(L, HTTP_REQUEST_ENTITY_TOO_LARGE);
+       makeintegerfield(L, HTTP_REQUEST_URI_TOO_LARGE);
+       makeintegerfield(L, HTTP_UNSUPPORTED_MEDIA_TYPE);
+       makeintegerfield(L, HTTP_RANGE_NOT_SATISFIABLE);
+       makeintegerfield(L, HTTP_EXPECTATION_FAILED);
+       makeintegerfield(L, HTTP_UNPROCESSABLE_ENTITY);
+       makeintegerfield(L, HTTP_LOCKED);
+       makeintegerfield(L, HTTP_FAILED_DEPENDENCY);
+       makeintegerfield(L, HTTP_UPGRADE_REQUIRED);
+       makeintegerfield(L, HTTP_PRECONDITION_REQUIRED);
+       makeintegerfield(L, HTTP_TOO_MANY_REQUESTS);
+       makeintegerfield(L, HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE);
+       makeintegerfield(L, HTTP_INTERNAL_SERVER_ERROR);
+       makeintegerfield(L, HTTP_NOT_IMPLEMENTED);
+       makeintegerfield(L, HTTP_BAD_GATEWAY);
+       makeintegerfield(L, HTTP_SERVICE_UNAVAILABLE);
+       makeintegerfield(L, HTTP_GATEWAY_TIME_OUT);
+       makeintegerfield(L, HTTP_VERSION_NOT_SUPPORTED);
+       makeintegerfield(L, HTTP_VARIANT_ALSO_VARIES);
+       makeintegerfield(L, HTTP_INSUFFICIENT_STORAGE);
+       makeintegerfield(L, HTTP_LOOP_DETECTED);
+       makeintegerfield(L, HTTP_NOT_EXTENDED);
+       makeintegerfield(L, HTTP_NETWORK_AUTHENTICATION_REQUIRED);
+     */
+}
+
+/* END apache2 lmodule */
+
+/*  END library functions */
+
+/* callback for cleaning up a lua vm when pool is closed */
+static apr_status_t cleanup_lua(void *l)
+{
+    AP_DEBUG_ASSERT(l != NULL);
+    lua_close((lua_State *) l);
+    return APR_SUCCESS;
+}
+
+static apr_status_t server_cleanup_lua(void *resource, void *params, apr_pool_t *pool)
+{
+    ap_lua_server_spec* spec = (ap_lua_server_spec*) resource;
+    AP_DEBUG_ASSERT(spec != NULL);
+    if (spec->L != NULL) {
+        lua_close((lua_State *) spec->L);
+    }
+    return APR_SUCCESS;
+}
+
+/*
+        munge_path(L, 
+                   "path", 
+                   "?.lua", 
+                   "./?.lua", 
+                   lifecycle_pool,
+                   spec->package_paths, 
+                   spec->file);
+*/
+/**
+ * field -> "path" or "cpath"
+ * sub_pat -> "?.lua"
+ * rep_pat -> "./?.lua"
+ * pool -> lifecycle pool for allocations
+ * paths -> things to add
+ * file -> ???
+ */
+static void munge_path(lua_State *L,
+                       const char *field,
+                       const char *sub_pat,
+                       const char *rep_pat,
+                       apr_pool_t *pool,
+                       apr_array_header_t *paths,
+                       const char *file)
+{
+    const char *current;
+    const char *parent_dir;
+    const char *pattern;
+    const char *modified;
+    char *part;
+
+    lua_getglobal(L, "package");
+    lua_getfield(L, -1, field);
+    
+    current = lua_tostring(L, -1);
+
+    parent_dir = ap_make_dirstr_parent(pool, file);
+ 
+    pattern = apr_pstrcat(pool, parent_dir, sub_pat, NULL);
+
+    luaL_gsub(L, current, rep_pat, pattern);
+    lua_setfield(L, -3, field);
+    lua_getfield(L, -2, field);
+    modified = lua_tostring(L, -1);
+
+
+    lua_pop(L, 2);
+
+    part = apr_pstrcat(pool, modified, ";", apr_array_pstrcat(pool, paths, ';'),
+                       NULL);
+
+    lua_pushstring(L, part);
+    lua_setfield(L, -2, field);
+    lua_pop(L, 1);              /* pop "package" off the stack     */
+}
+
+#ifdef AP_ENABLE_LUAJIT
+static int loadjitmodule(lua_State *L, apr_pool_t *lifecycle_pool)
+{
+    lua_getglobal(L, "require");
+    lua_pushliteral(L, "jit.");
+    lua_pushvalue(L, -3);
+    lua_concat(L, 2);
+    if (lua_pcall(L, 1, 1, 0)) {
+        const char *msg = lua_tostring(L, -1);
+        ap_log_perror(APLOG_MARK, APLOG_DEBUG, 0, lifecycle_pool, APLOGNO(01480)
+                      "Failed to init LuaJIT: %s", msg);
+        return 1;
+    }
+    lua_getfield(L, -1, "start");
+    lua_remove(L, -2);  /* drop module table */
+    return 0;
+}
+
+#endif
+
+static apr_status_t vm_construct(lua_State **vm, void *params, apr_pool_t *lifecycle_pool)
+{
+    lua_State* L;
+
+    ap_lua_vm_spec *spec = params;
+
+    L = luaL_newstate();
+#ifdef AP_ENABLE_LUAJIT
+    luaopen_jit(L);
+#endif
+    luaL_openlibs(L);
+    if (spec->package_paths) {
+        munge_path(L, 
+                   "path", "?.lua", "./?.lua", 
+                   lifecycle_pool,
+                   spec->package_paths, 
+                   spec->file);
+    }
+    if (spec->package_cpaths) {
+        munge_path(L,
+                   "cpath", "?" AP_LUA_MODULE_EXT, "./?" AP_LUA_MODULE_EXT,
+                   lifecycle_pool,
+                   spec->package_cpaths,
+                   spec->file);
+    }
+
+    if (spec->cb) {
+        spec->cb(L, lifecycle_pool, spec->cb_arg);
+    }
+
+
+    if (spec->bytecode && spec->bytecode_len > 0) {
+        luaL_loadbuffer(L, spec->bytecode, spec->bytecode_len, spec->file);
+        lua_pcall(L, 0, LUA_MULTRET, 0);
+    }
+    else {
+        int rc;
+        ap_log_perror(APLOG_MARK, APLOG_DEBUG, 0, lifecycle_pool, APLOGNO(01481)
+            "loading lua file %s", spec->file);
+        rc = luaL_loadfile(L, spec->file);
+        if (rc != 0) {
+            ap_log_perror(APLOG_MARK, APLOG_ERR, 0, lifecycle_pool, APLOGNO(01482)
+                          "Error loading %s: %s", spec->file,
+                          rc == LUA_ERRMEM ? "memory allocation error"
+                                           : lua_tostring(L, 0));
+            return APR_EBADF;
+        }
+        if ( lua_pcall(L, 0, LUA_MULTRET, 0) == LUA_ERRRUN ) {
+            ap_log_perror(APLOG_MARK, APLOG_ERR, 0, lifecycle_pool, APLOGNO(02613)
+                          "Error loading %s: %s", spec->file,
+                            lua_tostring(L, -1));
+            return APR_EBADF;
+        }
+    }
+
+#ifdef AP_ENABLE_LUAJIT
+    loadjitmodule(L, lifecycle_pool);
+#endif
+    lua_pushlightuserdata(L, lifecycle_pool);
+    lua_setfield(L, LUA_REGISTRYINDEX, "Apache2.Wombat.pool");
+    *vm = L;
+
+    return APR_SUCCESS;
+}
+
+static ap_lua_vm_spec* copy_vm_spec(apr_pool_t* pool, ap_lua_vm_spec* spec) 
+{
+    ap_lua_vm_spec* copied_spec = apr_pcalloc(pool, sizeof(ap_lua_vm_spec));
+    copied_spec->bytecode_len = spec->bytecode_len;
+    copied_spec->bytecode = apr_pstrdup(pool, spec->bytecode);
+    copied_spec->cb = spec->cb;
+    copied_spec->cb_arg = NULL;
+    copied_spec->file = apr_pstrdup(pool, spec->file);
+    copied_spec->package_cpaths = apr_array_copy(pool, spec->package_cpaths);
+    copied_spec->package_paths = apr_array_copy(pool, spec->package_paths);
+    copied_spec->pool = pool;
+    copied_spec->scope = AP_LUA_SCOPE_SERVER;
+    copied_spec->codecache = spec->codecache;
+    return copied_spec;
+}
+
+static apr_status_t server_vm_construct(lua_State **resource, void *params, apr_pool_t *pool)
+{
+    lua_State* L;
+    ap_lua_server_spec* spec = apr_pcalloc(pool, sizeof(ap_lua_server_spec));
+    *resource = NULL;
+    if (vm_construct(&L, params, pool) == APR_SUCCESS) {
+        spec->finfo = apr_pcalloc(pool, sizeof(ap_lua_finfo));
+        if (L != NULL) {
+            spec->L = L;
+            *resource = (void*) spec;
+            lua_pushlightuserdata(L, spec);
+            lua_setfield(L, LUA_REGISTRYINDEX, "Apache2.Lua.server_spec");
+            return APR_SUCCESS;
+        }
+    }
+    return APR_EGENERAL;
+}
+
+/**
+ * Function used to create a lua_State instance bound into the web
+ * server in the appropriate scope.
+ */
+lua_State *ap_lua_get_lua_state(apr_pool_t *lifecycle_pool,
+                                               ap_lua_vm_spec *spec, request_rec* r)
+{
+    lua_State *L = NULL;
+    ap_lua_finfo *cache_info = NULL;
+    int tryCache = 0;
+    
+    if (spec->scope == AP_LUA_SCOPE_SERVER) {
+        char *hash;
+        apr_reslist_t* reslist = NULL;
+        ap_lua_server_spec* sspec = NULL;
+        hash = apr_psprintf(r->pool, "reslist:%s", spec->file);
+#if APR_HAS_THREADS
+        apr_thread_mutex_lock(ap_lua_mutex);
+#endif
+        if (apr_pool_userdata_get((void **)&reslist, hash,
+                                  r->server->process->pool) == APR_SUCCESS) {
+            if (reslist != NULL) {
+                if (apr_reslist_acquire(reslist, (void**) &sspec) == APR_SUCCESS) {
+                    L = sspec->L;
+                    cache_info = sspec->finfo;
+                }
+            }
+        }
+        if (L == NULL) {
+            ap_lua_vm_spec* server_spec = copy_vm_spec(r->server->process->pool, spec);
+            if (
+                    apr_reslist_create(&reslist, spec->vm_min, spec->vm_max, spec->vm_max, 0, 
+                                (apr_reslist_constructor) server_vm_construct, 
+                                (apr_reslist_destructor) server_cleanup_lua, 
+                                server_spec, r->server->process->pool)
+                    == APR_SUCCESS && reslist != NULL) {
+                apr_pool_userdata_set(reslist, hash, NULL,
+                                            r->server->process->pool);
+                if (apr_reslist_acquire(reslist, (void**) &sspec) == APR_SUCCESS) {
+                    L = sspec->L;
+                    cache_info = sspec->finfo;
+                }
+                else {
+#if APR_HAS_THREADS
+                    apr_thread_mutex_unlock(ap_lua_mutex);
+#endif
+                    return NULL;
+                }
+            }
+        }
+#if APR_HAS_THREADS
+        apr_thread_mutex_unlock(ap_lua_mutex);
+#endif
+    }
+    else {
+        if (apr_pool_userdata_get((void **)&L, spec->file,
+                              lifecycle_pool) != APR_SUCCESS) {
+            L = NULL;
+        }
+    }
+    if (L == NULL) {
+        ap_log_perror(APLOG_MARK, APLOG_DEBUG, 0, lifecycle_pool, APLOGNO(01483)
+                        "creating lua_State with file %s", spec->file);
+        /* not available, so create */
+
+        if (!vm_construct(&L, spec, lifecycle_pool)) {
+            AP_DEBUG_ASSERT(L != NULL);
+            apr_pool_userdata_set(L, spec->file, cleanup_lua, lifecycle_pool);
+        }
+    }
+
+    if (spec->codecache == AP_LUA_CACHE_FOREVER || (spec->bytecode && spec->bytecode_len > 0)) {
+        tryCache = 1;
+    }
+    else {
+        char* mkey;
+        if (spec->scope != AP_LUA_SCOPE_SERVER) {
+            mkey = apr_psprintf(r->pool, "ap_lua_modified:%s", spec->file);
+            apr_pool_userdata_get((void **)&cache_info, mkey, lifecycle_pool);
+            if (cache_info == NULL) {
+                cache_info = apr_pcalloc(lifecycle_pool, sizeof(ap_lua_finfo));
+                apr_pool_userdata_set((void*) cache_info, mkey, NULL, lifecycle_pool);
+            }
+        }
+        if (spec->codecache == AP_LUA_CACHE_STAT) {
+            apr_finfo_t lua_finfo;
+            apr_stat(&lua_finfo, spec->file, APR_FINFO_MTIME|APR_FINFO_SIZE, lifecycle_pool);
+
+            /* On first visit, modified will be zero, but that's fine - The file is 
+            loaded in the vm_construct function.
+            */
+            if ((cache_info->modified == lua_finfo.mtime && cache_info->size == lua_finfo.size)
+                    || cache_info->modified == 0) {
+                tryCache = 1;
+            }
+            cache_info->modified = lua_finfo.mtime;
+            cache_info->size = lua_finfo.size;
+        }
+        else if (spec->codecache == AP_LUA_CACHE_NEVER) {
+            if (cache_info->runs == 0)
+                tryCache = 1;
+        }
+        cache_info->runs++;
+    }
+    if (tryCache == 0 && spec->scope != AP_LUA_SCOPE_ONCE) {
+        int rc;
+        ap_log_perror(APLOG_MARK, APLOG_DEBUG, 0, lifecycle_pool, APLOGNO(02332)
+            "(re)loading lua file %s", spec->file);
+        rc = luaL_loadfile(L, spec->file);
+        if (rc != 0) {
+            ap_log_perror(APLOG_MARK, APLOG_ERR, 0, lifecycle_pool, APLOGNO(02333)
+                          "Error loading %s: %s", spec->file,
+                          rc == LUA_ERRMEM ? "memory allocation error"
+                                           : lua_tostring(L, 0));
+            return 0;
+        }
+        lua_pcall(L, 0, LUA_MULTRET, 0);
+    }
+
+    return L;
+}