--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/wrk/src/script.c	Thu Jan 22 20:10:30 2026 -0800
@@ -0,0 +1,576 @@
+// Copyright (C) 2013 - Will Glozer.  All rights reserved.
+
+#include <stdlib.h>
+#include <string.h>
+#include "script.h"
+#include "http_parser.h"
+#include "zmalloc.h"
+
+typedef struct {
+    char *name;
+    int   type;
+    void *value;
+} table_field;
+
+static int script_addr_tostring(lua_State *);
+static int script_addr_gc(lua_State *);
+static int script_stats_call(lua_State *);
+static int script_stats_len(lua_State *);
+static int script_stats_index(lua_State *);
+static int script_thread_index(lua_State *);
+static int script_thread_newindex(lua_State *);
+static int script_wrk_lookup(lua_State *);
+static int script_wrk_connect(lua_State *);
+
+static void set_fields(lua_State *, int, const table_field *);
+static void set_field(lua_State *, int, char *, int);
+static int push_url_part(lua_State *, char *, struct http_parser_url *, enum http_parser_url_fields);
+
+static const struct luaL_Reg addrlib[] = {
+    { "__tostring", script_addr_tostring   },
+    { "__gc"    ,   script_addr_gc         },
+    { NULL,         NULL                   }
+};
+
+static const struct luaL_Reg statslib[] = {
+    { "__call",     script_stats_call      },
+    { "__index",    script_stats_index     },
+    { "__len",      script_stats_len       },
+    { NULL,         NULL                   }
+};
+
+static const struct luaL_Reg threadlib[] = {
+    { "__index",    script_thread_index    },
+    { "__newindex", script_thread_newindex },
+    { NULL,         NULL                   }
+};
+
+lua_State *script_create(char *file, char *url, char **headers) {
+    lua_State *L = luaL_newstate();
+    luaL_openlibs(L);
+    (void) luaL_dostring(L, "wrk = require \"wrk\"");
+
+    luaL_newmetatable(L, "wrk.addr");
+    luaL_register(L, NULL, addrlib);
+    luaL_newmetatable(L, "wrk.stats");
+    luaL_register(L, NULL, statslib);
+    luaL_newmetatable(L, "wrk.thread");
+    luaL_register(L, NULL, threadlib);
+
+    struct http_parser_url parts = {};
+    script_parse_url(url, &parts);
+    char *path = "/";
+
+    if (parts.field_set & (1 << UF_PATH)) {
+        path = &url[parts.field_data[UF_PATH].off];
+    }
+
+    const table_field fields[] = {
+        { "lookup",  LUA_TFUNCTION, script_wrk_lookup  },
+        { "connect", LUA_TFUNCTION, script_wrk_connect },
+        { "path",    LUA_TSTRING,   path               },
+        { NULL,      0,             NULL               },
+    };
+
+    lua_getglobal(L, "wrk");
+
+    set_field(L, 4, "scheme", push_url_part(L, url, &parts, UF_SCHEMA));
+    set_field(L, 4, "host",   push_url_part(L, url, &parts, UF_HOST));
+    set_field(L, 4, "port",   push_url_part(L, url, &parts, UF_PORT));
+    set_fields(L, 4, fields);
+
+    lua_getfield(L, 4, "headers");
+    for (char **h = headers; *h; h++) {
+        char *p = strchr(*h, ':');
+        if (p && p[1] == ' ') {
+            lua_pushlstring(L, *h, p - *h);
+            lua_pushstring(L, p + 2);
+            lua_settable(L, 5);
+        }
+    }
+    lua_pop(L, 5);
+
+    if (file && luaL_dofile(L, file)) {
+        const char *cause = lua_tostring(L, -1);
+        fprintf(stderr, "%s: %s\n", file, cause);
+    }
+
+    return L;
+}
+
+bool script_resolve(lua_State *L, char *host, char *service) {
+    lua_getglobal(L, "wrk");
+
+    lua_getfield(L, -1, "resolve");
+    lua_pushstring(L, host);
+    lua_pushstring(L, service);
+    lua_call(L, 2, 0);
+
+    lua_getfield(L, -1, "addrs");
+    size_t count = lua_objlen(L, -1);
+    lua_pop(L, 2);
+    return count > 0;
+}
+
+void script_push_thread(lua_State *L, thread *t) {
+    thread **ptr = (thread **) lua_newuserdata(L, sizeof(thread **));
+    *ptr = t;
+    luaL_getmetatable(L, "wrk.thread");
+    lua_setmetatable(L, -2);
+}
+
+void script_init(lua_State *L, thread *t, int argc, char **argv) {
+    lua_getglobal(t->L, "wrk");
+
+    script_push_thread(t->L, t);
+    lua_setfield(t->L, -2, "thread");
+
+    lua_getglobal(L, "wrk");
+    lua_getfield(L, -1, "setup");
+    script_push_thread(L, t);
+    lua_call(L, 1, 0);
+    lua_pop(L, 1);
+
+    lua_getfield(t->L, -1, "init");
+    lua_newtable(t->L);
+    for (int i = 0; i < argc; i++) {
+        lua_pushstring(t->L, argv[i]);
+        lua_rawseti(t->L, -2, i);
+    }
+    lua_call(t->L, 1, 0);
+    lua_pop(t->L, 1);
+}
+
+uint64_t script_delay(lua_State *L) {
+    lua_getglobal(L, "delay");
+    lua_call(L, 0, 1);
+    uint64_t delay = lua_tonumber(L, -1);
+    lua_pop(L, 1);
+    return delay;
+}
+
+void script_request(lua_State *L, char **buf, size_t *len) {
+    int pop = 1;
+    lua_getglobal(L, "request");
+    if (!lua_isfunction(L, -1)) {
+        lua_getglobal(L, "wrk");
+        lua_getfield(L, -1, "request");
+        pop += 2;
+    }
+    lua_call(L, 0, 1);
+    const char *str = lua_tolstring(L, -1, len);
+    *buf = realloc(*buf, *len);
+    memcpy(*buf, str, *len);
+    lua_pop(L, pop);
+}
+
+void script_response(lua_State *L, int status, buffer *headers, buffer *body) {
+    lua_getglobal(L, "response");
+    lua_pushinteger(L, status);
+    lua_newtable(L);
+
+    for (char *c = headers->buffer; c < headers->cursor; ) {
+        c = buffer_pushlstring(L, c);
+        c = buffer_pushlstring(L, c);
+        lua_rawset(L, -3);
+    }
+
+    lua_pushlstring(L, body->buffer, body->cursor - body->buffer);
+    lua_call(L, 3, 0);
+
+    buffer_reset(headers);
+    buffer_reset(body);
+}
+
+bool script_is_function(lua_State *L, char *name) {
+    lua_getglobal(L, name);
+    bool is_function = lua_isfunction(L, -1);
+    lua_pop(L, 1);
+    return is_function;
+}
+
+bool script_is_static(lua_State *L) {
+    return !script_is_function(L, "request");
+}
+
+bool script_want_response(lua_State *L) {
+    return script_is_function(L, "response");
+}
+
+bool script_has_delay(lua_State *L) {
+    return script_is_function(L, "delay");
+}
+
+bool script_has_done(lua_State *L) {
+    return script_is_function(L, "done");
+}
+
+void script_header_done(lua_State *L, luaL_Buffer *buffer) {
+    luaL_pushresult(buffer);
+}
+
+void script_summary(lua_State *L, uint64_t duration, uint64_t requests, uint64_t bytes) {
+    const table_field fields[] = {
+        { "duration", LUA_TNUMBER, &duration },
+        { "requests", LUA_TNUMBER, &requests },
+        { "bytes",    LUA_TNUMBER, &bytes    },
+        { NULL,       0,           NULL      },
+    };
+    lua_newtable(L);
+    set_fields(L, 1, fields);
+}
+
+void script_errors(lua_State *L, errors *errors) {
+    uint64_t e[] = {
+        errors->connect,
+        errors->read,
+        errors->write,
+        errors->status,
+        errors->timeout
+    };
+    const table_field fields[] = {
+        { "connect", LUA_TNUMBER, &e[0] },
+        { "read",    LUA_TNUMBER, &e[1] },
+        { "write",   LUA_TNUMBER, &e[2] },
+        { "status",  LUA_TNUMBER, &e[3] },
+        { "timeout", LUA_TNUMBER, &e[4] },
+        { NULL,      0,           NULL  },
+    };
+    lua_newtable(L);
+    set_fields(L, 2, fields);
+    lua_setfield(L, 1, "errors");
+}
+
+void script_push_stats(lua_State *L, stats *s) {
+    stats **ptr = (stats **) lua_newuserdata(L, sizeof(stats **));
+    *ptr = s;
+    luaL_getmetatable(L, "wrk.stats");
+    lua_setmetatable(L, -2);
+}
+
+void script_done(lua_State *L, stats *latency, stats *requests) {
+    lua_getglobal(L, "done");
+    lua_pushvalue(L, 1);
+
+    script_push_stats(L, latency);
+    script_push_stats(L, requests);
+
+    lua_call(L, 3, 0);
+    lua_pop(L, 1);
+}
+
+static int verify_request(http_parser *parser) {
+    size_t *count = parser->data;
+    (*count)++;
+    return 0;
+}
+
+size_t script_verify_request(lua_State *L) {
+    http_parser_settings settings = {
+        .on_message_complete = verify_request
+    };
+    http_parser parser;
+    char *request = NULL;
+    size_t len, count = 0;
+
+    script_request(L, &request, &len);
+    http_parser_init(&parser, HTTP_REQUEST);
+    parser.data = &count;
+
+    size_t parsed = http_parser_execute(&parser, &settings, request, len);
+
+    if (parsed != len || count == 0) {
+        enum http_errno err = HTTP_PARSER_ERRNO(&parser);
+        const char *desc = http_errno_description(err);
+        const char *msg = err != HPE_OK ? desc : "incomplete request";
+        int line = 1, column = 1;
+
+        for (char *c = request; c < request + parsed; c++) {
+            column++;
+            if (*c == '\n') {
+                column = 1;
+                line++;
+            }
+        }
+
+        fprintf(stderr, "%s at %d:%d\n", msg, line, column);
+        exit(1);
+    }
+
+    return count;
+}
+
+static struct addrinfo *checkaddr(lua_State *L) {
+    struct addrinfo *addr = luaL_checkudata(L, -1, "wrk.addr");
+    luaL_argcheck(L, addr != NULL, 1, "`addr' expected");
+    return addr;
+}
+
+void script_addr_copy(struct addrinfo *src, struct addrinfo *dst) {
+    *dst = *src;
+    dst->ai_addr = zmalloc(src->ai_addrlen);
+    memcpy(dst->ai_addr, src->ai_addr, src->ai_addrlen);
+}
+
+struct addrinfo *script_addr_clone(lua_State *L, struct addrinfo *addr) {
+    struct addrinfo *udata = lua_newuserdata(L, sizeof(*udata));
+    luaL_getmetatable(L, "wrk.addr");
+    lua_setmetatable(L, -2);
+    script_addr_copy(addr, udata);
+    return udata;
+}
+
+static int script_addr_tostring(lua_State *L) {
+    struct addrinfo *addr = checkaddr(L);
+    char host[NI_MAXHOST];
+    char service[NI_MAXSERV];
+
+    int flags = NI_NUMERICHOST | NI_NUMERICSERV;
+    int rc = getnameinfo(addr->ai_addr, addr->ai_addrlen, host, NI_MAXHOST, service, NI_MAXSERV, flags);
+    if (rc != 0) {
+        const char *msg = gai_strerror(rc);
+        return luaL_error(L, "addr tostring failed %s", msg);
+    }
+
+    lua_pushfstring(L, "%s:%s", host, service);
+    return 1;
+}
+
+static int script_addr_gc(lua_State *L) {
+    struct addrinfo *addr = checkaddr(L);
+    zfree(addr->ai_addr);
+    return 0;
+}
+
+static stats *checkstats(lua_State *L) {
+    stats **s = luaL_checkudata(L, 1, "wrk.stats");
+    luaL_argcheck(L, s != NULL, 1, "`stats' expected");
+    return *s;
+}
+
+static int script_stats_percentile(lua_State *L) {
+    stats *s = checkstats(L);
+    lua_Number p = luaL_checknumber(L, 2);
+    lua_pushnumber(L, stats_percentile(s, p));
+    return 1;
+}
+
+static int script_stats_call(lua_State *L) {
+    stats *s = checkstats(L);
+    uint64_t index = lua_tonumber(L, 2);
+    uint64_t count;
+    lua_pushnumber(L, stats_value_at(s, index - 1, &count));
+    lua_pushnumber(L, count);
+    return 2;
+}
+
+static int script_stats_index(lua_State *L) {
+    stats *s = checkstats(L);
+    const char *method = lua_tostring(L, 2);
+    if (!strcmp("min",   method)) lua_pushnumber(L, s->min);
+    if (!strcmp("max",   method)) lua_pushnumber(L, s->max);
+    if (!strcmp("mean",  method)) lua_pushnumber(L, stats_mean(s));
+    if (!strcmp("stdev", method)) lua_pushnumber(L, stats_stdev(s, stats_mean(s)));
+    if (!strcmp("percentile", method)) {
+        lua_pushcfunction(L, script_stats_percentile);
+    }
+    return 1;
+}
+
+static int script_stats_len(lua_State *L) {
+    stats *s = checkstats(L);
+    lua_pushinteger(L, stats_popcount(s));
+    return 1;
+}
+
+static thread *checkthread(lua_State *L) {
+    thread **t = luaL_checkudata(L, 1, "wrk.thread");
+    luaL_argcheck(L, t != NULL, 1, "`thread' expected");
+    return *t;
+}
+
+static int script_thread_get(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *key = lua_tostring(L, -1);
+    lua_getglobal(t->L, key);
+    script_copy_value(t->L, L, -1);
+    lua_pop(t->L, 1);
+    return 1;
+}
+
+static int script_thread_set(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *name = lua_tostring(L, -2);
+    script_copy_value(L, t->L, -1);
+    lua_setglobal(t->L, name);
+    return 0;
+}
+
+static int script_thread_stop(lua_State *L) {
+    thread *t = checkthread(L);
+    aeStop(t->loop);
+    return 0;
+}
+
+static int script_thread_index(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *key = lua_tostring(L, 2);
+    if (!strcmp("get",  key)) lua_pushcfunction(L, script_thread_get);
+    if (!strcmp("set",  key)) lua_pushcfunction(L, script_thread_set);
+    if (!strcmp("stop", key)) lua_pushcfunction(L, script_thread_stop);
+    if (!strcmp("addr", key)) script_addr_clone(L, t->addr);
+    return 1;
+}
+
+static int script_thread_newindex(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *key = lua_tostring(L, -2);
+    if (!strcmp("addr", key)) {
+        struct addrinfo *addr = checkaddr(L);
+        if (t->addr) zfree(t->addr->ai_addr);
+        t->addr = zrealloc(t->addr, sizeof(*addr));
+        script_addr_copy(addr, t->addr);
+    } else {
+        luaL_error(L, "cannot set '%s' on thread", luaL_typename(L, -1));
+    }
+    return 0;
+}
+
+static int script_wrk_lookup(lua_State *L) {
+    struct addrinfo *addrs;
+    struct addrinfo hints = {
+        .ai_family   = AF_UNSPEC,
+        .ai_socktype = SOCK_STREAM
+    };
+    int rc, index = 1;
+
+    const char *host    = lua_tostring(L, -2);
+    const char *service = lua_tostring(L, -1);
+
+    if ((rc = getaddrinfo(host, service, &hints, &addrs)) != 0) {
+        const char *msg = gai_strerror(rc);
+        fprintf(stderr, "unable to resolve %s:%s %s\n", host, service, msg);
+        exit(1);
+    }
+
+    lua_newtable(L);
+    for (struct addrinfo *addr = addrs; addr != NULL; addr = addr->ai_next) {
+        script_addr_clone(L, addr);
+        lua_rawseti(L, -2, index++);
+    }
+
+    freeaddrinfo(addrs);
+    return 1;
+}
+
+static int script_wrk_connect(lua_State *L) {
+    struct addrinfo *addr = checkaddr(L);
+    int fd, connected = 0;
+    if ((fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol)) != -1) {
+        connected = connect(fd, addr->ai_addr, addr->ai_addrlen) == 0;
+        close(fd);
+    }
+    lua_pushboolean(L, connected);
+    return 1;
+}
+
+void script_copy_value(lua_State *src, lua_State *dst, int index) {
+    switch (lua_type(src, index)) {
+        case LUA_TBOOLEAN:
+            lua_pushboolean(dst, lua_toboolean(src, index));
+            break;
+        case LUA_TNIL:
+            lua_pushnil(dst);
+            break;
+        case LUA_TNUMBER:
+            lua_pushnumber(dst, lua_tonumber(src, index));
+            break;
+        case LUA_TSTRING:
+            lua_pushstring(dst, lua_tostring(src, index));
+            break;
+        case LUA_TTABLE:
+            lua_newtable(dst);
+            lua_pushnil(src);
+            while (lua_next(src, index - 1)) {
+                script_copy_value(src, dst, -2);
+                script_copy_value(src, dst, -1);
+                lua_settable(dst, -3);
+                lua_pop(src, 1);
+            }
+            lua_pop(src, 1);
+            break;
+        default:
+            luaL_error(src, "cannot transfer '%s' to thread", luaL_typename(src, index));
+    }
+}
+
+int script_parse_url(char *url, struct http_parser_url *parts) {
+    if (!http_parser_parse_url(url, strlen(url), 0, parts)) {
+        if (!(parts->field_set & (1 << UF_SCHEMA))) return 0;
+        if (!(parts->field_set & (1 << UF_HOST)))   return 0;
+        return 1;
+    }
+    return 0;
+}
+
+static int push_url_part(lua_State *L, char *url, struct http_parser_url *parts, enum http_parser_url_fields field) {
+    int type = parts->field_set & (1 << field) ? LUA_TSTRING : LUA_TNIL;
+    uint16_t off, len;
+    switch (type) {
+        case LUA_TSTRING:
+            off = parts->field_data[field].off;
+            len = parts->field_data[field].len;
+            lua_pushlstring(L, &url[off], len);
+            break;
+        case LUA_TNIL:
+            lua_pushnil(L);
+    }
+    return type;
+}
+
+static void set_field(lua_State *L, int index, char *field, int type) {
+    (void) type;
+    lua_setfield(L, index, field);
+}
+
+static void set_fields(lua_State *L, int index, const table_field *fields) {
+    for (int i = 0; fields[i].name; i++) {
+        table_field f = fields[i];
+        switch (f.value == NULL ? LUA_TNIL : f.type) {
+            case LUA_TFUNCTION:
+                lua_pushcfunction(L, (lua_CFunction) f.value);
+                break;
+            case LUA_TNUMBER:
+                lua_pushinteger(L, *((lua_Integer *) f.value));
+                break;
+            case LUA_TSTRING:
+                lua_pushstring(L, (const char *) f.value);
+                break;
+            case LUA_TNIL:
+                lua_pushnil(L);
+                break;
+        }
+        lua_setfield(L, index, f.name);
+    }
+}
+
+void buffer_append(buffer *b, const char *data, size_t len) {
+    size_t used = b->cursor - b->buffer;
+    while (used + len + 1 >= b->length) {
+        b->length += 1024;
+        b->buffer  = realloc(b->buffer, b->length);
+        b->cursor  = b->buffer + used;
+    }
+    memcpy(b->cursor, data, len);
+    b->cursor += len;
+}
+
+void buffer_reset(buffer *b) {
+    b->cursor = b->buffer;
+}
+
+char *buffer_pushlstring(lua_State *L, char *start) {
+    char *end = strchr(start, 0);
+    lua_pushlstring(L, start, end - start);
+    return end + 1;
+}