X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/b6d0605d27499279414e2433fae470302c99c110..7e5391fd937dd287b3aef363e641f2d3abc5f422:/Console.cpp

diff --git a/Console.cpp b/Console.cpp
index 25f624e..4a27c64 100644
--- a/Console.cpp
+++ b/Console.cpp
@@ -1,4 +1,4 @@
-/* Cycript - Remove Execution Server and Disassembler
+/* Cycript - Inlining/Optimizing JavaScript Compiler
  * Copyright (C) 2009  Jay Freeman (saurik)
 */
 
@@ -37,18 +37,28 @@
 */
 /* }}} */
 
-#define _GNU_SOURCE
-
-#include <substrate.h>
 #include "cycript.hpp"
 
+#ifdef CY_EXECUTE
+#include "JavaScript.hpp"
+#endif
+
 #include <cstdio>
 #include <sstream>
 
 #include <setjmp.h>
 
+#ifdef HAVE_READLINE_H
+#include <readline.h>
+#else
 #include <readline/readline.h>
+#endif
+
+#ifdef HAVE_HISTORY_H
+#include <history.h>
+#else
 #include <readline/history.h>
+#endif
 
 #include <sys/mman.h>
 
@@ -65,42 +75,112 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <sys/un.h>
+#include <pwd.h>
+
+#include <apr_getopt.h>
+
+#include <dlfcn.h>
+
+#include "Replace.hpp"
+
+static volatile enum {
+    Working,
+    Parsing,
+    Running,
+    Sending,
+    Waiting,
+} mode_;
 
 static jmp_buf ctrlc_;
 
 static void sigint(int) {
-    longjmp(ctrlc_, 1);
+    switch (mode_) {
+        case Working:
+            return;
+        case Parsing:
+            longjmp(ctrlc_, 1);
+        case Running:
+            throw "*** Ctrl-C";
+        case Sending:
+            return;
+        case Waiting:
+            return;
+    }
 }
 
-void Run(int socket, const char *data, size_t size, FILE *fout, bool expand = false) {
-    CYPool pool;
+#if YYDEBUG
+static bool bison_;
+#endif
+static bool strict_;
+static bool pretty_;
+
+void Setup(CYDriver &driver, cy::parser &parser) {
+#if YYDEBUG
+    if (bison_)
+        parser.set_debug_level(1);
+#endif
+    if (strict_)
+        driver.strict_ = true;
+}
+
+void Setup(CYOutput &out, CYDriver &driver, CYOptions &options) {
+    out.pretty_ = pretty_;
+    CYContext context(driver.pool_, options);
+    driver.program_->Replace(context);
+}
 
+static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
     const char *json;
-    if (socket == -1) {
-        json = CYExecute(pool, data);
+    size_t size;
+
+    if (client == -1) {
+        mode_ = Running;
+#ifdef CY_EXECUTE
+        json = CYExecute(pool, code.data);
+#else
+        json = NULL;
+#endif
+        mode_ = Working;
         if (json != NULL)
             size = strlen(json);
     } else {
-        CYSendAll(socket, &size, sizeof(size));
-        CYSendAll(socket, data, size);
-        CYRecvAll(socket, &size, sizeof(size));
+        mode_ = Sending;
+        CYSendAll(client, &size, sizeof(size));
+        CYSendAll(client, code.data, size);
+        mode_ = Waiting;
+        CYRecvAll(client, &size, sizeof(size));
         if (size == _not(size_t))
             json = NULL;
         else {
             char *temp(new(pool) char[size + 1]);
-            CYRecvAll(socket, temp, size);
+            CYRecvAll(client, temp, size);
             temp[size] = '\0';
             json = temp;
         }
+        mode_ = Working;
     }
 
-    if (json != NULL && fout != NULL) {
-        if (!expand || json[0] != '"' && json[0] != '\'')
-            fputs(json, fout);
+    return CYUTF8String(json, size);
+}
+
+static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
+    return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
+}
+
+void Run(int client, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
+    CYPool pool;
+    CYUTF8String json(Run(pool, client, CYUTF8String(data, size)));
+
+    data = json.data;
+    size = json.size;
+
+    if (data != NULL && fout != NULL) {
+        if (!expand || data[0] != '"' && data[0] != '\'')
+            fputs(data, fout);
         else for (size_t i(0); i != size; ++i)
-            if (json[i] != '\\')
-                fputc(json[i], fout);
-            else switch(json[++i]) {
+            if (data[i] != '\\')
+                fputc(data[i], fout);
+            else switch(data[++i]) {
                 case '\0': goto done;
                 case '\\': fputc('\\', fout); break;
                 case '\'': fputc('\'', fout); break;
@@ -120,18 +200,199 @@ void Run(int socket, const char *data, size_t size, FILE *fout, bool expand = fa
     }
 }
 
-void Run(int socket, std::string &code, FILE *fout, bool expand = false) {
-    Run(socket, code.c_str(), code.size(), fout, expand);
+static void Run(int client, std::string &code, FILE *fout = NULL, bool expand = false) {
+    Run(client, code.c_str(), code.size(), fout, expand);
+}
+
+int (*append_history$)(int, const char *);
+
+static std::string command_;
+
+static CYExpression *ParseExpression(CYPool &pool, CYUTF8String code) {
+    std::ostringstream str;
+    str << '(' << code << ')';
+    std::string string(str.str());
+
+    CYDriver driver(pool);
+    driver.data_ = string.c_str();
+    driver.size_ = string.size();
+
+    cy::parser parser(driver);
+    Setup(driver, parser);
+
+    if (parser.parse() != 0 || !driver.errors_.empty())
+        _assert(false);
+
+    CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
+    _assert(express != NULL);
+    return express->expression_;
+}
+
+static int client_;
+
+static char **Complete(const char *word, int start, int end) {
+    rl_attempted_completion_over = TRUE;
+
+    CYPool pool;
+
+    CYDriver driver(pool);
+    cy::parser parser(driver);
+    Setup(driver, parser);
+
+    std::string line(rl_line_buffer, start);
+    std::string command(command_ + line);
+
+    driver.data_ = command.c_str();
+    driver.size_ = command.size();
+
+    driver.auto_ = true;
+
+    if (parser.parse() != 0 || !driver.errors_.empty())
+        return NULL;
+
+    if (driver.mode_ == CYDriver::AutoNone)
+        return NULL;
+
+    CYExpression *expression;
+
+    CYOptions options;
+    CYContext context(driver.pool_, options);
+
+    std::ostringstream prefix;
+
+    switch (driver.mode_) {
+        case CYDriver::AutoPrimary:
+            expression = $ CYThis();
+        break;
+
+        case CYDriver::AutoDirect:
+            expression = driver.context_;
+        break;
+
+        case CYDriver::AutoIndirect:
+            expression = $ CYIndirect(driver.context_);
+        break;
+
+        case CYDriver::AutoMessage: {
+            CYDriver::Context &thing(driver.contexts_.back());
+            expression = $M($M($ CYIndirect(thing.context_), $S("isa")), $S("messages"));
+            for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
+                prefix << (*part)->word_ << ':';
+        } break;
+
+        default:
+            _assert(false);
+    }
+
+    std::string begin(prefix.str() + word);
+
+    driver.program_ = $ CYProgram($ CYExpress($C2(ParseExpression(pool,
+    "   function(object, prefix) {\n"
+    "       var names = [];\n"
+    "       var pattern = '^' + prefix;\n"
+    "       for (name in object)\n"
+    "           if (name.match(pattern) != null)\n"
+    "               names.push(name);\n"
+    "       return names;\n"
+    "   }\n"
+    ), expression, $S(begin.c_str()))));
+
+    driver.program_->Replace(context);
+
+    std::ostringstream str;
+    CYOutput out(str, options);
+    out << *driver.program_;
+
+    std::string code(str.str());
+    CYUTF8String json(Run(pool, client_, code));
+
+    CYExpression *result(ParseExpression(pool, json));
+    CYArray *array(dynamic_cast<CYArray *>(result));
+    _assert(array != NULL);
+
+    // XXX: use an std::set?
+    typedef std::vector<std::string> Completions;
+    Completions completions;
+
+    std::string common;
+    bool rest(false);
+
+    for (CYElement *element(array->elements_); element != NULL; element = element->next_) {
+        CYString *string(dynamic_cast<CYString *>(element->value_));
+        _assert(string != NULL);
+
+        std::string completion(string->value_, string->size_);
+        completions.push_back(completion);
+
+        if (!rest) {
+            common = completion;
+            rest = true;
+        } else {
+            size_t limit(completion.size()), size(common.size());
+            if (size > limit)
+                common = common.substr(0, limit);
+            else
+                limit = size;
+            for (limit = 0; limit != size; ++limit)
+                if (common[limit] != completion[limit])
+                    break;
+            if (limit != size)
+                common = common.substr(0, limit);
+        }
+    }
+
+    size_t count(completions.size());
+    if (count == 0)
+        return NULL;
+
+    if (!common.empty()) {
+        size_t size(prefix.str().size());
+        _assert(common.size() >= size);
+        common = common.substr(size);
+    }
+
+    char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
+
+    results[0] = strdup(common.c_str());
+    size_t index(0);
+    for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
+        results[++index] = strdup(i->c_str());
+    results[count + 1] = NULL;
+
+    return results;
 }
 
-static void Console(int socket) {
+// need char *, not const char *
+static char name_[] = "cycript";
+static char break_[] = " \t\n\"\\'`@$><=;|&{(" ".:";
+
+static void Console(apr_pool_t *pool, CYOptions &options) {
+    passwd *passwd;
+    if (const char *username = getenv("LOGNAME"))
+        passwd = getpwnam(username);
+    else
+        passwd = getpwuid(getuid());
+
+    const char *basedir(apr_psprintf(pool, "%s/.cycript", passwd->pw_dir));
+    const char *histfile(apr_psprintf(pool, "%s/history", basedir));
+    size_t histlines(0);
+
+    rl_initialize();
+    rl_readline_name = name_;
+
+    mkdir(basedir, 0700);
+    read_history(histfile);
+
     bool bypass(false);
     bool debug(false);
     bool expand(false);
 
     FILE *fout(stdout);
 
-    rl_bind_key('\t', rl_insert);
+    // rl_completer_word_break_characters is broken in libedit
+    rl_basic_word_break_characters = break_;
+    rl_attempted_completion_function = &Complete;
+    rl_bind_key('\t', rl_complete);
 
     struct sigaction action;
     sigemptyset(&action.sa_mask);
@@ -140,22 +401,27 @@ static void Console(int socket) {
     sigaction(SIGINT, &action, NULL);
 
     restart: for (;;) {
-        std::string command;
+        command_.clear();
         std::vector<std::string> lines;
 
         bool extra(false);
         const char *prompt("cy# ");
 
         if (setjmp(ctrlc_) != 0) {
+            mode_ = Working;
             fputs("\n", fout);
             fflush(fout);
             goto restart;
         }
 
       read:
+        mode_ = Parsing;
         char *line(readline(prompt));
+        mode_ = Working;
         if (line == NULL)
             break;
+        if (line[0] == '\0')
+            goto read;
 
         if (!extra) {
             extra = true;
@@ -175,74 +441,100 @@ static void Console(int socket) {
                     fflush(fout);
                 }
                 add_history(line);
+                ++histlines;
                 goto restart;
             }
         }
 
-        lines.push_back(line);
-        command += line;
+        command_ += line;
+
+        char *begin(line), *end(line + strlen(line));
+        while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
+            *nl = '\0';
+            lines.push_back(begin);
+            begin = nl + 1;
+        }
+
+        lines.push_back(begin);
+
         free(line);
 
         std::string code;
 
         if (bypass)
-            code = command;
+            code = command_;
         else {
-            CYDriver driver("");
+            CYDriver driver;
             cy::parser parser(driver);
+            Setup(driver, parser);
 
-            driver.data_ = command.c_str();
-            driver.size_ = command.size();
+            driver.data_ = command_.c_str();
+            driver.size_ = command_.size();
 
             if (parser.parse() != 0 || !driver.errors_.empty()) {
                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
                     cy::position begin(error->location_.begin);
-                    if (begin.line != lines.size() || begin.column - 1 != lines.back().size()) {
+                    if (begin.line != lines.size() || begin.column - 1 != lines.back().size() || error->warning_) {
                         cy::position end(error->location_.end);
+
                         if (begin.line != lines.size()) {
                             std::cerr << "  | ";
                             std::cerr << lines[begin.line - 1] << std::endl;
                         }
-                        std::cerr << "  | ";
+
+                        std::cerr << "....";
                         for (size_t i(0); i != begin.column - 1; ++i)
                             std::cerr << '.';
-                        if (begin.line != end.line)
+                        if (begin.line != end.line || begin.column == end.column)
                             std::cerr << '^';
                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
                             std::cerr << '^';
                         std::cerr << std::endl;
+
                         std::cerr << "  | ";
                         std::cerr << error->message_ << std::endl;
-                        add_history(command.c_str());
+
+                        add_history(command_.c_str());
+                        ++histlines;
                         goto restart;
                     }
                 }
 
                 driver.errors_.clear();
 
-                command += '\n';
+                command_ += '\n';
                 prompt = "cy> ";
                 goto read;
             }
 
-            if (driver.source_ == NULL)
+            if (driver.program_ == NULL)
                 goto restart;
 
-            if (socket != -1)
-                code = command;
+            if (client_ != -1)
+                code = command_;
             else {
                 std::ostringstream str;
-                driver.source_->Show(str);
+                CYOutput out(str, options);
+                Setup(out, driver, options);
+                out << *driver.program_;
                 code = str.str();
             }
         }
 
-        add_history(command.c_str());
+        add_history(command_.c_str());
+        ++histlines;
 
         if (debug)
             std::cout << code << std::endl;
 
-        Run(socket, code, fout, expand);
+        Run(client_, code, fout, expand);
+    }
+
+    if (append_history$ != NULL) {
+        _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
+        (*append_history$)(histlines, histfile);
+    } else {
+        write_history(histfile);
     }
 
     fputs("\n", fout);
@@ -266,94 +558,270 @@ static void *Map(const char *path, size_t *psize) {
     return base;
 }
 
-int main(int argc, char *argv[]) {
+void InjectLibrary(pid_t pid);
+
+int Main(int argc, char const * const argv[], char const * const envp[]) {
+    bool tty(isatty(STDIN_FILENO));
+    bool compile(false);
+    CYOptions options;
+
+    append_history$ = reinterpret_cast<int (*)(int, const char *)>(dlsym(RTLD_DEFAULT, "append_history"));
+
+#ifdef CY_ATTACH
     pid_t pid(_not(pid_t));
+#endif
 
-    for (;;) switch (getopt(argc, argv, "p:")) {
-        case -1:
-            goto getopt;
-        case '?':
-            fprintf(stderr, "usage: cycript [-p <pid>] [<script> [<arg>...]]\n");
-            return 1;
-
-        case 'p': {
-            size_t size(strlen(optarg));
-            char *end;
-            pid = strtoul(optarg, &end, 0);
-            if (optarg + size != end) {
-                fprintf(stderr, "invalid pid for -p\n");
+    CYPool pool;
+    apr_getopt_t *state;
+    _aprcall(apr_getopt_init(&state, pool, argc, argv));
+
+    for (;;) {
+        char opt;
+        const char *arg;
+
+        apr_status_t status(apr_getopt(state,
+            "cg:n:"
+#ifdef CY_ATTACH
+            "p:"
+#endif
+            "s"
+        , &opt, &arg));
+
+        switch (status) {
+            case APR_EOF:
+                goto getopt;
+            case APR_BADCH:
+            case APR_BADARG:
+                fprintf(stderr,
+                    "usage: cycript [-c]"
+#ifdef CY_ATTACH
+                    " [-p <pid|name>]"
+#endif
+                    " [<script> [<arg>...]]\n"
+                );
                 return 1;
-            }
-        } break;
+            default:
+                _aprcall(status);
+        }
+
+        switch (opt) {
+            case 'c':
+                compile = true;
+            break;
+
+            case 'g':
+                if (false);
+                else if (strcmp(arg, "rename") == 0)
+                    options.verbose_ = true;
+#if YYDEBUG
+                else if (strcmp(arg, "bison") == 0)
+                    bison_ = true;
+#endif
+                else {
+                    fprintf(stderr, "invalid name for -g\n");
+                    return 1;
+                }
+            break;
+
+            case 'n':
+                if (false);
+                else if (strcmp(arg, "minify") == 0)
+                    pretty_ = true;
+                else {
+                    fprintf(stderr, "invalid name for -n\n");
+                    return 1;
+                }
+            break;
+
+#ifdef CY_ATTACH
+            case 'p': {
+                size_t size(strlen(arg));
+                char *end;
+
+                pid = strtoul(arg, &end, 0);
+                if (arg + size != end) {
+                    // XXX: arg needs to be escaped in some horrendous way of doom
+                    const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
+
+                    if (FILE *pids = popen(command, "r")) {
+                        char value[32];
+                        size = 0;
+
+                        for (;;) {
+                            size_t read(fread(value + size, 1, sizeof(value) - size, pids));
+                            if (read == 0)
+                                break;
+                            else {
+                                size += read;
+                                if (size == sizeof(value)) {
+                                    pid = _not(pid_t);
+                                    goto fail;
+                                }
+                            }
+                        }
+
+                      size:
+                        if (size == 0)
+                            goto fail;
+                        if (value[size - 1] == '\n') {
+                            --size;
+                            goto size;
+                        }
+
+                        value[size] = '\0';
+                        size = strlen(value);
+                        pid = strtoul(value, &end, 0);
+                        if (value + size != end) fail:
+                            pid = _not(pid_t);
+                        _syscall(pclose(pids));
+                    }
+
+                    if (pid == _not(pid_t)) {
+                        fprintf(stderr, "invalid pid for -p\n");
+                        return 1;
+                    }
+                }
+            } break;
+#endif
+
+            case 's':
+                strict_ = true;
+            break;
+        }
     } getopt:;
 
     const char *script;
+    int ind(state->ind);
 
-    if (optind < argc - 1 && pid != _not(pid_t)) {
+#ifdef CY_ATTACH
+    if (pid != _not(pid_t) && ind < argc - 1) {
         fprintf(stderr, "-p cannot set argv\n");
         return 1;
     }
 
-    if (optind == argc)
+    if (pid != _not(pid_t) && compile) {
+        fprintf(stderr, "-p conflicts with -c\n");
+        return 1;
+    }
+#endif
+
+    if (ind == argc)
         script = NULL;
     else {
+#ifdef CY_EXECUTE
         // XXX: const_cast?! wtf gcc :(
-        CYSetArgs(argc - optind - 1, const_cast<const char **>(argv + optind + 1));
-        script = argv[optind];
+        CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
+#endif
+        script = argv[ind];
         if (strcmp(script, "-") == 0)
             script = NULL;
     }
 
-    int socket;
+#ifdef CY_ATTACH
+    if (pid != _not(pid_t) && script == NULL && !tty) {
+        fprintf(stderr, "non-terminal attaching to remote console\n");
+        return 1;
+    }
+#endif
 
+#ifdef CY_ATTACH
     if (pid == _not(pid_t))
-        socket = -1;
+        client_ = -1;
     else {
-        socket = _syscall(::socket(PF_UNIX, SOCK_STREAM, 0));
-
-        struct sockaddr_un address;
-        memset(&address, 0, sizeof(address));
-        address.sun_family = AF_UNIX;
-        sprintf(address.sun_path, "/tmp/.s.cy.%u", pid);
-
-        _syscall(connect(socket, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
+        int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
+            struct sockaddr_un address;
+            memset(&address, 0, sizeof(address));
+            address.sun_family = AF_UNIX;
+
+            sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
+
+            _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
+            _syscall(chmod(address.sun_path, 0777));
+
+            try {
+                _syscall(listen(server, 1));
+                InjectLibrary(pid);
+                client_ = _syscall(accept(server, NULL, NULL));
+            } catch (...) {
+                // XXX: exception?
+                unlink(address.sun_path);
+                throw;
+            }
+        } catch (...) {
+            _syscall(close(server));
+            throw;
+        }
     }
+#else
+    client_ = -1;
+#endif
 
-    if (script == NULL)
-        Console(socket);
+    if (script == NULL && tty)
+        Console(pool, options);
     else {
-        CYDriver driver(script);
+        CYDriver driver(pool, script ?: "<stdin>");
         cy::parser parser(driver);
+        Setup(driver, parser);
 
-        size_t size;
-        char *start(reinterpret_cast<char *>(Map(script, &size)));
-        char *end(start + size);
+        char *start, *end;
 
-        if (size >= 2 && start[0] == '#' && start[1] == '!') {
-            start += 2;
+        if (script == NULL) {
+            start = NULL;
+            end = NULL;
 
-            if (void *line = memchr(start, '\n', end - start))
-                start = reinterpret_cast<char *>(line);
-            else
-                start = end;
-        }
+            driver.file_ = stdin;
+        } else {
+            size_t size;
+            start = reinterpret_cast<char *>(Map(script, &size));
+            end = start + size;
 
-        driver.data_ = start;
-        driver.size_ = end - start;
+            if (size >= 2 && start[0] == '#' && start[1] == '!') {
+                start += 2;
+
+                if (void *line = memchr(start, '\n', end - start))
+                    start = reinterpret_cast<char *>(line);
+                else
+                    start = end;
+            }
+
+            driver.data_ = start;
+            driver.size_ = end - start;
+        }
 
         if (parser.parse() != 0 || !driver.errors_.empty()) {
             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
-        } else if (driver.source_ != NULL)
-            if (socket != -1)
-                Run(socket, start, end - start, stdout);
-            else {
+        } else if (driver.program_ != NULL)
+            if (client_ != -1) {
+                std::string code(start, end-start);
+                Run(client_, code, stdout);
+            } else {
                 std::ostringstream str;
-                driver.source_->Show(str);
+                CYOutput out(str, options);
+                Setup(out, driver, options);
+                out << *driver.program_;
                 std::string code(str.str());
-                Run(socket, code, stdout);
+                if (compile)
+                    std::cout << code;
+                else
+                    Run(client_, code, stdout);
             }
     }
 
     return 0;
 }
+
+int main(int argc, char const * const argv[], char const * const envp[]) {
+    apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
+
+    if (status != APR_SUCCESS) {
+        fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
+        return 1;
+    } else try {
+        return Main(argc, argv, envp);
+    } catch (const CYException &error) {
+        CYPool pool;
+        fprintf(stderr, "%s\n", error.PoolCString(pool));
+        return 1;
+    }
+}