Question

我试图像这样做一个简单的插件示例：

#include "gcc-plugin.h"
#include "tree.h"
#include "gimple.h"
#include "tree-pass.h"
#include <stdio.h>

extern void
test(void*gcc_data, void*b) {
    printf("Hellow world\n");
}

extern int plugin_init (struct plugin_name_args *plugin_info,
                        struct plugin_gcc_version *version)
{
    const char * nombre = "Hello world";
    register_callback(nombre, GIMPLE_PASS, &test, NULL);

    return 0;
}

但是GIMPLE_PASS不是gcc-plugin.h中的预定义事件，我知道我必须在PLUGIN_PASS_MANAGER_SETUP中对struct pass_data和tree-pass.h执行某些操作，但我不知道＃39;我不确切知道如何找到任何例子。

有人会告诉我怎么样？ iThanks。

Answer 1

我知道你可能不再需要这个了，但它对其他人有用，我最近一直在这方面工作，并且有关于此的0个文档......你所能做的就是找到一些示例（只有少数几个）并尝试了解他们正在尝试做什么（如果评论很好），我正在编写一个解析gimple代码的插件，这是我plugin_init的方式

int plugin_init (plugin_name_args* plugin_info,
             plugin_gcc_version* ver)
{
  // You can get the plugin name
  const char * const plugin_name = plugin_info->base_name;
  cerr << "starting ";
  // here you can get the plugin args and number of args, 
  // look at https://gcc.gnu.org/onlinedocs/gccint/Plugins-loading.html#Plugins-loading
  // for more information how to give your plugin some args
  const int argc = plugin_info->argc;   
  const struct plugin_argument * const argv = plugin_info->argv;
  struct register_pass_info calls_printer_info;

  // Here you say where you need to put your plugin, mine is called after ssa
  // This is my pass
  calls_printer_info.pass                         = new calls_printer_pass();
  calls_printer_info.reference_pass_name          = "ssa" ;
  calls_printer_info.ref_pass_instance_number     = 1;
  calls_printer_info.pos_op                       = PASS_POS_INSERT_AFTER;
  register_callback (plugin_name,
                     PLUGIN_PASS_MANAGER_SETUP,
                     NULL,
                     &calls_printer_info);
  return 0;
}

您需要先创建通行证：

static const struct pass_data calls_printer_pass_data = {
                .type                   = GIMPLE_PASS,
                .name                   = "calls_printer",
                .optinfo_flags          = OPTGROUP_NONE,
                .has_gate               = false,
                .has_execute            = true,
                .tv_id                  = TV_NONE,
                .properties_required    = PROP_cfg,
                .properties_provided    = 0,
                .properties_destroyed   = 0,
                .todo_flags_start       = 0,
                .todo_flags_finish      = 0
};

class calls_printer_pass : public gimple_opt_pass {
public:
        calls_printer_pass() : gimple_opt_pass(calls_printer_pass_data, g) {}
        // put the function you want to execute when the pass is executed
        unsigned int execute() { return my_function(); }
};

并且不要忘记许可证：

int plugin_is_GPL_compatible;

如何注册GIMPLE_PASS？

1 个答案: