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/* Generic GDB-side plugin
Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef CC1_PLUGIN_GDBCTX_HH
#define CC1_PLUGIN_GDBCTX_HH
namespace cc1_plugin
{
// The compiler context that we hand back to our caller.
template<typename T>
struct base_gdb_plugin : public T
{
explicit base_gdb_plugin (const gcc_base_vtable *v)
: verbose (false),
compilerp (new compiler (verbose))
{
this->base.ops = v;
}
// A convenience function to print something.
void print (const char *str)
{
this->print_function (this->print_datum, str);
}
// Set the verbose flag.
void set_verbose (bool v)
{
verbose = v;
if (compilerp != nullptr)
compilerp->set_verbose (v);
}
// Make a new connection.
void set_connection (int fd, int aux_fd)
{
connection.reset (new local_connection (fd, aux_fd, this));
}
// A local subclass of connection that holds a back-pointer to the
// context object that we provide to our caller.
class local_connection : public cc1_plugin::connection
{
public:
local_connection (int fd, int aux_fd, base_gdb_plugin<T> *b)
: connection (fd, aux_fd),
back_ptr (b)
{
}
void print (const char *buf) override
{
back_ptr->print (buf);
}
base_gdb_plugin<T> *back_ptr;
};
std::unique_ptr<local_connection> connection;
void (*print_function) (void *datum, const char *message) = nullptr;
void *print_datum = nullptr;
std::vector<std::string> args;
std::string source_file;
/* Non-zero as an equivalent to gcc driver option "-v". */
bool verbose;
std::unique_ptr<cc1_plugin::compiler> compilerp;
};
// Instances of this rpc<> template function are installed into the
// "vtable"s. These functions are parameterized by type and method
// name and forward the call via the connection.
template<typename CTX, typename R, const char *&NAME, typename... Arg>
R rpc (CTX *s, Arg... rest)
{
base_gdb_plugin<CTX> *self = (base_gdb_plugin<CTX> *) s;
R result;
if (!cc1_plugin::call (self->connection.get (), NAME, &result, rest...))
return 0;
return result;
}
}
#endif // CC1_PLUGIN_GDBCTX_HH
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