forked from linzj/gen-trace
/
plugin.cpp
218 lines (195 loc) · 6.58 KB
/
plugin.cpp
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#include "gcc-plugin.h"
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "tree-pass.h"
#include "tree-cfg.h"
#include "function.h"
#include "gimple-expr.h"
#include "langhooks.h"
#include "timevar.h"
#include "dumpfile.h"
#include "target.h"
#include "df.h"
#include "tree-ssa-alias.h"
#include "internal-fn.h"
#include "is-a.h"
#include "gimple.h"
#include "gimple-ssa.h"
#include "stringpool.h"
#include "gimplify.h"
#include "gimple-iterator.h"
#define CTRACE_THREAD_SUPPORTED
#include "ctrace.h"
extern void print_generic_decl (FILE *file, tree decl, int flags);
extern void print_node (FILE *file, const char *prefix, tree node, int indent);
extern void print_generic_stmt (FILE *file, tree t, int flags);
static struct pass_data mypass = {
GIMPLE_PASS, /* type */
"gen_trace", /* name */
OPTGROUP_NONE, /* optinfo_flags */
TV_NONE, /* tv_id */
PROP_gimple_any, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
TODO_mark_first_instance, /* todo_flags_start */
0, /* todo_flags_finish */
};
extern gcc::context *g;
int plugin_is_GPL_compatible;
static tree
build_type ()
{
tree ret_type, i_type, a_type, field_decl;
ret_type = make_node (RECORD_TYPE);
i_type = build_index_type (size_int (sizeof (CTrace) - 1));
a_type = build_array_type (char_type_node, i_type);
field_decl = build_decl (UNKNOWN_LOCATION, FIELD_DECL, NULL_TREE, a_type);
TYPE_FIELDS (ret_type) = field_decl;
TYPE_SIZE_UNIT (ret_type)
= build_int_cst (integer_type_node, sizeof (CTrace));
TYPE_NAME (ret_type) = get_identifier ("__CtraceStruct__");
if (dump_file)
{
fprintf (dump_file, "begin print built type:\n");
print_generic_stmt (dump_file, ret_type, TDF_VERBOSE);
fprintf (dump_file, "end print built type:\n");
}
return ret_type;
}
static tree
build_function_decl (const char *name, tree param_type)
{
tree func_decl, function_type_list;
function_type_list = build_function_type_list (
void_type_node, build_pointer_type (param_type),
build_pointer_type (build_type_variant (char_type_node, true, false)),
NULL_TREE);
func_decl = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL,
get_identifier (name), function_type_list);
if (dump_file)
{
fprintf (dump_file, "begin print built function type %s:\n", name);
print_generic_decl (dump_file, func_decl, TDF_VERBOSE);
fprintf (dump_file, "end print built function type %s:\n", name);
}
TREE_USED (func_decl) = 1;
return func_decl;
}
static tree
make_fname_decl ()
{
const char *name = lang_hooks.decl_printable_name (current_function_decl, 0);
tree decl, type, init;
size_t length = strlen (name);
type = build_array_type (build_type_variant (char_type_node, true, false),
build_index_type (size_int (length)));
decl = build_decl (UNKNOWN_LOCATION, VAR_DECL,
get_identifier ("__function_name__"), type);
TREE_STATIC (decl) = 1;
TREE_READONLY (decl) = 1;
DECL_ARTIFICIAL (decl) = 1;
init = build_string (length + 1, name);
TREE_TYPE (init) = type;
TREE_READONLY (init) = 1;
DECL_READ_P (decl) = 1;
DECL_INITIAL (decl) = init;
TREE_USED (decl) = 1;
TREE_ADDRESSABLE (decl) = 1;
DECL_CONTEXT (decl) = current_function_decl;
return decl;
}
static unsigned int
execute_trace ()
{
gimple_seq body, body_bind_body, inner_cleanup, outer_cleanup;
gimple inner_try, outer_try;
tree record_type, func_start_decl, func_end_decl, var_decl,
function_name_decl, constructor_clobber;
gimple call_func_start;
gimple_stmt_iterator gsi;
// build record type
record_type = build_type ();
// build start & end function decl
func_start_decl = build_function_decl ("__start_ctrace__", record_type);
func_end_decl = build_function_decl ("__end_ctrace__", record_type);
// init variables of current body
body = gimple_body (current_function_decl);
var_decl = build_decl (UNKNOWN_LOCATION, VAR_DECL,
get_identifier ("__ctrace_var__"), record_type);
DECL_CONTEXT (var_decl) = current_function_decl;
TREE_ADDRESSABLE (var_decl) = 1;
declare_vars (var_decl, body, false);
TREE_USED (var_decl) = 1;
// mimic __FUNCTION__ builtin.
function_name_decl = make_fname_decl ();
declare_vars (function_name_decl, body, false);
// construct inner try
// init calls
call_func_start = gimple_build_call (
func_start_decl, 2,
build1 (ADDR_EXPR, build_pointer_type (record_type), var_decl),
build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (function_name_decl)),
function_name_decl));
// make inner clean up
inner_cleanup = gimple_build_call (
func_end_decl, 2,
build1 (ADDR_EXPR, build_pointer_type (record_type), var_decl),
build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (function_name_decl)),
function_name_decl));
// update inner try
body_bind_body = gimple_bind_body (body);
inner_try
= gimple_build_try (body_bind_body, inner_cleanup, GIMPLE_TRY_FINALLY);
gsi = gsi_start (inner_try);
gsi_insert_before (&gsi, call_func_start, GSI_NEW_STMT);
// construct outer try
constructor_clobber = make_node (CONSTRUCTOR);
TREE_THIS_VOLATILE (constructor_clobber) = 1;
TREE_TYPE (constructor_clobber) = TREE_TYPE (var_decl);
outer_cleanup = gimple_build_assign (var_decl, constructor_clobber);
// update outer try
outer_try
= gimple_build_try (call_func_start, outer_cleanup, GIMPLE_TRY_FINALLY);
// update body bind body
gimple_bind_set_body (body, outer_try);
if (dump_file)
{
dump_function_to_file (current_function_decl, dump_file,
TDF_TREE | TDF_BLOCKS | TDF_VERBOSE);
}
// exit (0);
return 0;
}
class trace_pass : public gimple_opt_pass
{
public:
trace_pass (pass_data &mydata, gcc::context *context)
: gimple_opt_pass (mydata, context)
{
}
virtual bool
gate (function *)
{
return true;
}
unsigned int
execute (function *)
{
return execute_trace ();
}
};
int
plugin_init (struct plugin_name_args *plugin_info,
struct plugin_gcc_version *version)
{
struct register_pass_info pass_info
= { new trace_pass (mypass, g), "omplower", 1, PASS_POS_INSERT_BEFORE };
/* Code to fill in the pass_info object with new pass information. */
/* Register the new pass. */
register_callback (plugin_info->base_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
&pass_info);
return 0;
}