hphp/runtime/vm/php-debug.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-2014 Facebook, Inc. (http://www.facebook.com)     |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #include <stdlib.h>
  18
  19 #include <set>
  20 #include <string>
  21 #include <vector>
  22
  23 #include "hphp/util/debug.h"
  24 #include "hphp/util/text-util.h"
  25 #include "hphp/util/trace.h"
  26
  27 #ifndef DEBUG
  28 /*
  29  * Forcefully always compile this unit with debug enabled, to permit mixing
  30  * and matching of optimized and unoptimized binaries.
  31  */
  32 #define DEBUG
  33 #endif
  34
  35 using std::string;
  36 using std::vector;
  37
  38 #include "hphp/runtime/vm/php-debug.h"
  39
  40 namespace HPHP {
  41
  42 struct PhpDebugger {
  43   std::set<string> enabledFunctions;
  44
  45   PhpDebugger() {
  46     const char *env = getenv("PHPBREAKPOINTS");
  47     if (env) {
  48       vector<string> names;
  49       split(',', env, names, true /*ignoreEmpty*/);
  50       for (size_t i = 0; i < names.size(); ++i) {
  51         enabledFunctions.insert(names[i]);
  52       }
  53     }
  54   }
  55
  56   bool isBpFunction(const char* nm) const {
  57     std::set<string>::const_iterator i = enabledFunctions.find(string(nm));
  58     return i != enabledFunctions.end();
  59   }
  60 };
  61
  62 static PhpDebugger dbg;
  63 bool phpBreakpointEnabled(const char* sourceName) {
  64   return dbg.isBpFunction(sourceName);
  65 }
  66
  67 }
  68
  69 /*
  70  * Add or remove functions from the debug-set from gdb. Not exposed in
  71  * header files.
  72  *
  73  * Usage:
  74  *   (gdb) call phpbreak("idx")
  75  *   (gdb) continue
  76  */
  77
  78 void phpbreak(const char* name) {
  79   HPHP::dbg.enabledFunctions.insert(std::string(name));
  80 }
  81
  82 void phpdisable(const char *name) {
  83   HPHP::dbg.enabledFunctions.erase(std::string(name));
  84 }