/
monograph.c
1204 lines (1103 loc) · 32.2 KB
/
monograph.c
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#include <glib.h>
#include <string.h>
#include <math.h>
#include "mono/metadata/metadata-internals.h"
#include "mono/metadata/class-internals.h"
#include "mono/metadata/assembly.h"
#include "mono/metadata/tokentype.h"
#include "mono/metadata/opcodes.h"
#include "mono/metadata/tabledefs.h"
#include "mono/metadata/mono-endian.h"
#include "mono/metadata/appdomain.h" /* mono_init */
#include "mono/metadata/debug-helpers.h"
#include "mono/utils/mono-compiler.h"
static FILE *output;
static int include_namespace = 0;
static int max_depth = 6;
static int verbose = 0;
static const char *graph_properties = "\tnode [fontsize=8.0]\n\tedge [len=2,color=red]\n";
static void
output_type_edge (MonoClass *first, MonoClass *second) {
if (include_namespace)
fprintf (output, "\t\"%s.%s\" -> \"%s.%s\"\n", first->name_space, first->name, second->name_space, second->name);
else
fprintf (output, "\t\"%s\" -> \"%s\"\n", first->name, second->name);
}
static void
print_subtypes (MonoImage *image, MonoClass *class, int depth) {
int i, token;
const MonoTableInfo *t;
MonoClass *child;
if (depth++ > max_depth)
return;
t = mono_image_get_table_info (image, MONO_TABLE_TYPEDEF);
token = mono_metadata_token_index (class->type_token);
token <<= MONO_TYPEDEFORREF_BITS;
token |= MONO_TYPEDEFORREF_TYPEDEF;
/* use a subgraph? */
for (i = 0; i < mono_table_info_get_rows (t); ++i) {
if (token == mono_metadata_decode_row_col (t, i, MONO_TYPEDEF_EXTENDS)) {
child = mono_class_get (image, MONO_TOKEN_TYPE_DEF | (i + 1));
output_type_edge (class, child);
print_subtypes (image, child, depth);
}
}
}
static void
type_graph (MonoImage *image, const char* cname) {
MonoClass *class;
MonoClass *parent;
MonoClass *child;
const char *name_space;
char *p;
int depth = 0;
cname = g_strdup (cname);
p = strrchr (cname, '.');
if (p) {
name_space = cname;
*p++ = 0;
cname = p;
} else {
name_space = "";
}
class = mono_class_from_name (image, name_space, cname);
if (!class) {
g_print ("class %s.%s not found\n", name_space, cname);
exit (1);
}
fprintf (output, "digraph blah {\n");
fprintf (output, "%s", graph_properties);
child = class;
/* go back and print the parents for the node as well: not sure it's a good idea */
for (parent = class->parent; parent; parent = parent->parent) {
output_type_edge (parent, child);
child = parent;
}
print_subtypes (image, class, depth);
fprintf (output, "}\n");
}
static void
interface_graph (MonoImage *image, const char* cname) {
MonoClass *class;
MonoClass *child;
const char *name_space;
char *p;
guint32 cols [MONO_INTERFACEIMPL_SIZE];
guint32 token, i, count = 0;
const MonoTableInfo *intf = mono_image_get_table_info (image, MONO_TABLE_INTERFACEIMPL);
cname = g_strdup (cname);
p = strrchr (cname, '.');
if (p) {
name_space = cname;
*p++ = 0;
cname = p;
} else {
name_space = "";
}
class = mono_class_from_name (image, name_space, cname);
if (!class) {
g_print ("interface %s.%s not found\n", name_space, cname);
exit (1);
}
/* chek if it's really an interface... */
fprintf (output, "digraph interface {\n");
fprintf (output, "%s", graph_properties);
/* TODO: handle inetrface defined in one image and class defined in another. */
token = mono_metadata_token_index (class->type_token);
token <<= MONO_TYPEDEFORREF_BITS;
token |= MONO_TYPEDEFORREF_TYPEDEF;
for (i = 0; i < mono_table_info_get_rows (intf); ++i) {
mono_metadata_decode_row (intf, i, cols, MONO_INTERFACEIMPL_SIZE);
/*g_print ("index: %d [%d implements %d]\n", index, cols [MONO_INTERFACEIMPL_CLASS], cols [MONO_INTERFACEIMPL_INTERFACE]);*/
if (token == cols [MONO_INTERFACEIMPL_INTERFACE]) {
child = mono_class_get (image, MONO_TOKEN_TYPE_DEF | cols [MONO_INTERFACEIMPL_CLASS]);
output_type_edge (class, child);
count++;
}
}
fprintf (output, "}\n");
if (verbose && !count)
g_print ("No class implements %s.%s\n", class->name_space, class->name);
}
static int back_branch_waste = 0;
static int branch_waste = 0;
static int var_waste = 0;
static int int_waste = 0;
static int nop_waste = 0;
static int has_exceptions = 0;
static int num_exceptions = 0;
static int max_exceptions = 0;
static int has_locals = 0;
static int num_locals = 0;
static int max_locals = 0;
static int has_args = 0;
static int num_args = 0;
static int max_args = 0;
static int has_maxstack = 0;
static int num_maxstack = 0;
static int max_maxstack = 0;
static int has_code = 0;
static int num_code = 0;
static int max_code = 0;
static int has_branch = 0;
static int num_branch = 0;
static int max_branch = 0;
static int has_condbranch = 0;
static int num_condbranch = 0;
static int max_condbranch = 0;
static int has_calls = 0;
static int num_calls = 0;
static int max_calls = 0;
static int has_throw = 0;
static int num_throw = 0;
static int max_throw = 0;
static int has_switch = 0;
static int num_switch = 0;
static int max_switch = 0;
static int cast_sealed = 0;
static int cast_iface = 0;
static int total_cast = 0;
static int nonvirt_callvirt = 0;
static int iface_callvirt = 0;
static int total_callvirt = 0;
static void
method_stats (MonoMethod *method) {
const MonoOpcode *opcode;
MonoMethodHeader *header;
MonoMethodSignature *sig;
const unsigned char *ip, *il_code_end;
guint32 i, n;
int local_branch = 0, local_condbranch = 0, local_throw = 0, local_calls = 0;
gint64 l;
if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME))
return;
if (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))
return;
header = mono_method_get_header (method);
n = mono_method_header_get_num_clauses (header);
if (n)
has_exceptions++;
num_exceptions += n;
if (max_exceptions < n)
max_exceptions = n;
mono_method_header_get_locals (header, &n, NULL);
if (n)
has_locals++;
num_locals += n;
if (max_locals < n)
max_locals = n;
ip = mono_method_header_get_code (header, &n, &i);
il_code_end = ip + n;
if (max_maxstack < i)
max_maxstack = i;
num_maxstack += i;
if (i != 8) /* just a guess */
has_maxstack++;
sig = mono_method_signature (method);
n = sig->hasthis + sig->param_count;
if (max_args < n)
max_args = n;
num_args += n;
if (n)
has_args++;
has_code++;
if (max_code < il_code_end - ip)
max_code = il_code_end - ip;
num_code += il_code_end - ip;
while (ip < il_code_end) {
if (*ip == 0xfe) {
++ip;
i = *ip + 256;
} else {
i = *ip;
}
opcode = &mono_opcodes [i];
switch (opcode->argument) {
case MonoInlineNone:
if (i == MONO_CEE_NOP)
nop_waste++;
++ip;
break;
case MonoInlineI:
n = read32 (ip + 1);
if (n >= -1 && n <= 8) {
int_waste += 4;
g_print ("%s %d\n", mono_opcode_name (i), n);
} else if (n < 128 && n >= -128) {
int_waste += 3;
g_print ("%s %d\n", mono_opcode_name (i), n);
}
ip += 5;
break;
case MonoInlineType:
if (i == MONO_CEE_CASTCLASS || i == MONO_CEE_ISINST) {
guint32 token = read32 (ip + 1);
MonoClass *k = mono_class_get (method->klass->image, token);
if (k && k->flags & TYPE_ATTRIBUTE_SEALED)
cast_sealed++;
if (k && k->flags & TYPE_ATTRIBUTE_INTERFACE)
cast_iface++;
total_cast++;
}
ip += 5;
break;
case MonoInlineField:
case MonoInlineTok:
case MonoInlineString:
case MonoInlineSig:
case MonoShortInlineR:
ip += 5;
break;
case MonoInlineBrTarget:
n = read32 (ip + 1);
if (n < 128 && n >= -128) {
branch_waste += 3;
if (n < 0)
back_branch_waste += 3;
}
ip += 5;
break;
case MonoInlineVar:
n = read16 (ip + 1);
if (n < 256) {
if (n < 4) {
switch (i) {
case MONO_CEE_LDARG:
case MONO_CEE_LDLOC:
case MONO_CEE_STLOC:
var_waste += 3;
/*g_print ("%s %d\n", mono_opcode_name (i), n);*/
break;
default:
var_waste += 2;
/*g_print ("%s %d\n", mono_opcode_name (i), n);*/
break;
}
} else {
var_waste += 2;
/*g_print ("%s %d\n", mono_opcode_name (i), n);*/
}
}
ip += 3;
break;
case MonoShortInlineVar:
if ((signed char)ip [1] < 4 && (signed char)ip [1] >= 0) {
switch (i) {
case MONO_CEE_LDARG_S:
case MONO_CEE_LDLOC_S:
case MONO_CEE_STLOC_S:
var_waste++;
/*g_print ("%s %d\n", mono_opcode_name (i), (signed char)ip [1]);*/
break;
default:
break;
}
}
ip += 2;
break;
case MonoShortInlineI:
if ((signed char)ip [1] <= 8 && (signed char)ip [1] >= -1) {
/*g_print ("%s %d\n", mono_opcode_name (i), (signed char)ip [1]);*/
int_waste ++;
}
ip += 2;
break;
case MonoShortInlineBrTarget:
ip += 2;
break;
case MonoInlineSwitch: {
gint32 n;
++ip;
n = read32 (ip);
ip += 4;
ip += 4 * n;
num_switch += n;
has_switch++;
if (max_switch < n)
max_switch = n;
break;
}
case MonoInlineR:
ip += 9;
break;
case MonoInlineI8:
l = read64 (ip + 1);
/* should load and convert */
if (l >= -1 && l <= 8) {
int_waste += 7;
} else if (l < 128 && l >= -128) {
int_waste += 6;
} else if (l <= 2147483647 && l >= (-2147483647 -1)) {
int_waste += 3;
}
ip += 9;
break;
case MonoInlineMethod:
if (i == MONO_CEE_CALLVIRT) {
MonoMethod *cm = mono_get_method (method->klass->image, read32 (ip + 1), NULL);
if (cm && !(cm->flags & METHOD_ATTRIBUTE_VIRTUAL))
nonvirt_callvirt++;
if (cm && (cm->klass->flags & TYPE_ATTRIBUTE_INTERFACE))
iface_callvirt++;
total_callvirt++;
}
ip += 5;
break;
default:
g_assert_not_reached ();
}
switch (opcode->flow_type) {
case MONO_FLOW_BRANCH:
local_branch++;
break;
case MONO_FLOW_COND_BRANCH:
local_condbranch++;
break;
case MONO_FLOW_CALL:
local_calls++;
break;
case MONO_FLOW_ERROR:
local_throw++;
break;
}
}
if (local_branch)
has_branch++;
if (max_branch < local_branch)
max_branch = local_branch;
num_branch += local_branch;
if (local_condbranch)
has_condbranch++;
if (max_condbranch < local_condbranch)
max_condbranch = local_condbranch;
num_condbranch += local_condbranch;
if (local_calls)
has_calls++;
if (max_calls < local_calls)
max_calls = local_calls;
num_calls += local_calls;
if (local_throw)
has_throw++;
if (max_throw < local_throw)
max_throw = local_throw;
num_throw += local_throw;
return;
}
static int num_pdepth = 0;
static int max_pdepth = 0;
static int num_pdepth_ovf = 0;
static int num_ifaces = 0;
static int *pdepth_array = NULL;
static int pdepth_array_size = 0;
static int pdepth_array_next = 0;
static void
type_stats (MonoClass *klass) {
MonoClass *parent;
int depth = 1;
if (klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
num_ifaces++;
return;
}
parent = klass->parent;
while (parent) {
depth++;
parent = parent->parent;
}
if (pdepth_array_next >= pdepth_array_size) {
pdepth_array_size *= 2;
if (!pdepth_array_size)
pdepth_array_size = 128;
pdepth_array = g_realloc (pdepth_array, pdepth_array_size * sizeof (int));
}
pdepth_array [pdepth_array_next++] = depth;
num_pdepth += depth;
if (max_pdepth < depth)
max_pdepth = depth;
if (depth > MONO_DEFAULT_SUPERTABLE_SIZE) {
/*g_print ("overflow parent depth: %s.%s\n", klass->name_space, klass->name);*/
num_pdepth_ovf++;
}
}
static void
stats (MonoImage *image, const char *name) {
int i, num_methods, num_types;
MonoMethod *method;
MonoClass *klass;
num_methods = mono_image_get_table_rows (image, MONO_TABLE_METHOD);
for (i = 0; i < num_methods; ++i) {
method = mono_get_method (image, MONO_TOKEN_METHOD_DEF | (i + 1), NULL);
method_stats (method);
}
num_types = mono_image_get_table_rows (image, MONO_TABLE_TYPEDEF);
for (i = 0; i < num_types; ++i) {
klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | (i + 1));
type_stats (klass);
}
g_print ("Methods and code stats:\n");
g_print ("back branch waste: %d\n", back_branch_waste);
g_print ("branch waste: %d\n", branch_waste);
g_print ("var waste: %d\n", var_waste);
g_print ("int waste: %d\n", int_waste);
g_print ("nop waste: %d\n", nop_waste);
g_print ("has exceptions: %d/%d, total: %d, max: %d, mean: %f\n", has_exceptions, num_methods, num_exceptions, max_exceptions, num_exceptions/(double)has_exceptions);
g_print ("has locals: %d/%d, total: %d, max: %d, mean: %f\n", has_locals, num_methods, num_locals, max_locals, num_locals/(double)has_locals);
g_print ("has args: %d/%d, total: %d, max: %d, mean: %f\n", has_args, num_methods, num_args, max_args, num_args/(double)has_args);
g_print ("has maxstack: %d/%d, total: %d, max: %d, mean: %f\n", has_maxstack, num_methods, num_maxstack, max_maxstack, num_maxstack/(double)i);
g_print ("has code: %d/%d, total: %d, max: %d, mean: %f\n", has_code, num_methods, num_code, max_code, num_code/(double)has_code);
g_print ("has branch: %d/%d, total: %d, max: %d, mean: %f\n", has_branch, num_methods, num_branch, max_branch, num_branch/(double)has_branch);
g_print ("has condbranch: %d/%d, total: %d, max: %d, mean: %f\n", has_condbranch, num_methods, num_condbranch, max_condbranch, num_condbranch/(double)has_condbranch);
g_print ("has switch: %d/%d, total: %d, max: %d, mean: %f\n", has_switch, num_methods, num_switch, max_switch, num_switch/(double)has_switch);
g_print ("has calls: %d/%d, total: %d, max: %d, mean: %f\n", has_calls, num_methods, num_calls, max_calls, num_calls/(double)has_calls);
g_print ("has throw: %d/%d, total: %d, max: %d, mean: %f\n", has_throw, num_methods, num_throw, max_throw, num_throw/(double)has_throw);
g_print ("sealed type cast: %d/%d\n", cast_sealed, total_cast);
g_print ("interface type cast: %d/%d\n", cast_iface, total_cast);
g_print ("non virtual callvirt: %d/%d\n", nonvirt_callvirt, total_callvirt);
g_print ("interface callvirt: %d/%d\n", iface_callvirt, total_callvirt);
g_print ("\nType stats:\n");
g_print ("interface types: %d/%d\n", num_ifaces, num_types);
{
double mean = 0;
double stddev = 0;
if (pdepth_array_next) {
int i;
mean = (double)num_pdepth/pdepth_array_next;
for (i = 0; i < pdepth_array_next; ++i) {
stddev += (pdepth_array [i] - mean) * (pdepth_array [i] - mean);
}
stddev = sqrt (stddev/pdepth_array_next);
}
g_print ("parent depth: max: %d, mean: %f, sttdev: %f, overflowing: %d\n", max_pdepth, mean, stddev, num_pdepth_ovf);
}
}
static void
type_size_stats (MonoClass *klass)
{
int code_size = 0;
MonoMethod *method;
MonoMethodHeader *header;
gpointer iter;
iter = NULL;
while ((method = mono_class_get_methods (klass, &iter))) {
guint32 size, maxs;
header = mono_method_get_header (method);
if (!header)
continue;
mono_method_header_get_code (header, &size, &maxs);
code_size += size;
}
g_print ("%s.%s: code: %d\n", klass->name_space, klass->name, code_size);
}
static void
size_stats (MonoImage *image, const char *name) {
int i, num_types;
MonoClass *klass;
num_types = mono_image_get_table_rows (image, MONO_TABLE_TYPEDEF);
for (i = 0; i < num_types; ++i) {
klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | (i + 1));
type_size_stats (klass);
}
}
static char *
get_signature (MonoMethod *method) {
GString *res;
static GHashTable *hash = NULL;
char *result;
if (!hash)
hash = g_hash_table_new (g_direct_hash, g_direct_equal);
if ((result = g_hash_table_lookup (hash, method)))
return result;
res = g_string_new ("");
if (include_namespace && *(method->klass->name_space))
g_string_append_printf (res, "%s.", method->klass->name_space);
result = mono_signature_get_desc (mono_method_signature (method), include_namespace);
g_string_append_printf (res, "%s:%s(%s)", method->klass->name, method->name, result);
g_free (result);
g_hash_table_insert (hash, method, res->str);
result = res->str;
g_string_free (res, FALSE);
return result;
}
static void
output_method_edge (MonoMethod *first, MonoMethod *second) {
char * f = get_signature (first);
char * s = get_signature (second);
fprintf (output, "\t\"%s\" -> \"%s\"\n", f, s);
}
/*
* We need to handle virtual calls is derived types.
* We could check what types implement the method and
* disassemble all of them: this can make the graph to explode.
* We could try and keep track of the 'this' pointer type and
* consider only the methods in the classes derived from that:
* this can reduce the graph complexity somewhat (and it would
* be the more correct approach).
*/
static void
print_method (MonoMethod *method, int depth) {
const MonoOpcode *opcode;
MonoMethodHeader *header;
GHashTable *hash;
static GHashTable *visited = NULL;
const unsigned char *ip, *il_code_end;
guint32 i;
if (depth++ > max_depth)
return;
if (! visited)
visited = g_hash_table_new (NULL, NULL);
if (g_hash_table_lookup (visited, method))
return;
g_hash_table_insert (visited, method, method);
if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME))
return;
if (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))
return;
header = mono_method_get_header (method);
ip = mono_method_header_get_code (header, &i, NULL);
il_code_end = ip + i;
hash = g_hash_table_new (g_direct_hash, g_direct_equal);
while (ip < il_code_end) {
if (*ip == 0xfe) {
++ip;
i = *ip + 256;
} else {
i = *ip;
}
opcode = &mono_opcodes [i];
switch (opcode->argument) {
case MonoInlineNone:
++ip;
break;
case MonoInlineType:
case MonoInlineField:
case MonoInlineTok:
case MonoInlineString:
case MonoInlineSig:
case MonoShortInlineR:
case MonoInlineI:
case MonoInlineBrTarget:
ip += 5;
break;
case MonoInlineVar:
ip += 3;
break;
case MonoShortInlineVar:
case MonoShortInlineI:
case MonoShortInlineBrTarget:
ip += 2;
break;
case MonoInlineSwitch: {
gint32 n;
++ip;
n = read32 (ip);
ip += 4;
ip += 4 * n;
break;
}
case MonoInlineR:
case MonoInlineI8:
ip += 9;
break;
case MonoInlineMethod: {
guint32 token;
MonoMethod *called;
ip++;
token = read32 (ip);
ip += 4;
called = mono_get_method (method->klass->image, token, NULL);
if (!called)
break; /* warn? */
if (g_hash_table_lookup (hash, called))
break;
g_hash_table_insert (hash, called, called);
output_method_edge (method, called);
print_method (called, depth);
break;
}
default:
g_assert_not_reached ();
}
}
g_hash_table_destroy (hash);
}
static void
method_graph (MonoImage *image, const char *name) {
int depth = 0;
MonoMethod *method = NULL;
if (!name) {
guint32 token = mono_image_get_entry_point (image);
if (!token || !(method = mono_get_method (image, token, NULL))) {
g_print ("Cannot find entry point in %s: specify an explict method name.\n", mono_image_get_filename (image));
exit (1);
}
} else {
/* search the method */
MonoMethodDesc *desc;
desc = mono_method_desc_new (name, include_namespace);
if (!desc) {
g_print ("Invalid method name %s\n", name);
exit (1);
}
method = mono_method_desc_search_in_image (desc, image);
if (!method) {
g_print ("Cannot find method %s\n", name);
exit (1);
}
}
fprintf (output, "digraph blah {\n");
fprintf (output, "%s", graph_properties);
print_method (method, depth);
fprintf (output, "}\n");
}
typedef struct MonoBasicBlock MonoBasicBlock;
struct MonoBasicBlock {
const unsigned char* cil_code;
gint32 cil_length;
gint dfn;
GList *in_bb;
GList *out_bb;
};
static const unsigned char *debug_start;
static void
link_bblock (MonoBasicBlock *from, MonoBasicBlock* to)
{
from->out_bb = g_list_prepend (from->out_bb, to);
to->in_bb = g_list_prepend (to->in_bb, from);
/*fprintf (stderr, "linking IL_%04x to IL_%04x\n", from->cil_code-debug_start, to->cil_code-debug_start);*/
}
static int
compare_bblock (const void *a, const void *b)
{
MonoBasicBlock * const *ab = a;
MonoBasicBlock * const *bb = b;
return (*ab)->cil_code - (*bb)->cil_code;
}
static GPtrArray*
mono_method_find_bblocks (MonoMethodHeader *header)
{
const unsigned char *ip, *end, *start;
const MonoOpcode *opcode;
guint32 i, block_end = 0;
GPtrArray *result = g_ptr_array_new ();
GHashTable *table = g_hash_table_new (g_direct_hash, g_direct_equal);
MonoBasicBlock *entry_bb, *end_bb, *bb, *target;
ip = mono_method_header_get_code (header, &i, NULL);
end = ip + i;
debug_start = ip;
entry_bb = g_new0 (MonoBasicBlock, 1);
end_bb = g_new0 (MonoBasicBlock, 1);
g_ptr_array_add (result, entry_bb);
g_ptr_array_add (result, end_bb);
bb = g_new0 (MonoBasicBlock, 1);
bb->cil_code = ip;
g_ptr_array_add (result, bb);
link_bblock (entry_bb, bb);
g_hash_table_insert (table, (char*)ip, bb);
block_end = TRUE;
/* handle exception code blocks... */
while (ip < end) {
start = ip;
if ((target = g_hash_table_lookup (table, ip)) && target != bb) {
if (!block_end)
link_bblock (bb, target);
bb = target;
block_end = FALSE;
}
if (block_end) {
/*fprintf (stderr, "processing bbclok at IL_%04x\n", ip - header->code);*/
if (!(bb = g_hash_table_lookup (table, ip))) {
bb = g_new0 (MonoBasicBlock, 1);
bb->cil_code = ip;
g_ptr_array_add (result, bb);
g_hash_table_insert (table, (char*)ip, bb);
}
block_end = FALSE;
}
if (*ip == 0xfe) {
++ip;
i = *ip + 256;
} else {
i = *ip;
}
opcode = &mono_opcodes [i];
switch (opcode->flow_type) {
case MONO_FLOW_RETURN:
link_bblock (bb, end_bb);
case MONO_FLOW_ERROR:
block_end = 1;
break;
case MONO_FLOW_BRANCH: /* we handle branch when checking the argument type */
case MONO_FLOW_COND_BRANCH:
case MONO_FLOW_CALL:
case MONO_FLOW_NEXT:
case MONO_FLOW_META:
break;
default:
g_assert_not_reached ();
}
switch (opcode->argument) {
case MonoInlineNone:
++ip;
break;
case MonoInlineType:
case MonoInlineField:
case MonoInlineMethod:
case MonoInlineTok:
case MonoInlineString:
case MonoInlineSig:
case MonoShortInlineR:
case MonoInlineI:
ip += 5;
break;
case MonoInlineVar:
ip += 3;
break;
case MonoShortInlineVar:
case MonoShortInlineI:
ip += 2;
break;
case MonoShortInlineBrTarget:
case MonoInlineBrTarget:
ip++;
if (opcode->argument == MonoShortInlineBrTarget) {
i = (signed char)*ip;
ip++;
} else {
i = (gint32) read32 (ip);
ip += 4;
}
if (opcode->flow_type == MONO_FLOW_COND_BRANCH) {
if (!(target = g_hash_table_lookup (table, ip))) {
target = g_new0 (MonoBasicBlock, 1);
target->cil_code = ip;
g_ptr_array_add (result, target);
g_hash_table_insert (table, (char*)ip, target);
}
link_bblock (bb, target);
}
if (!(target = g_hash_table_lookup (table, ip + i))) {
target = g_new0 (MonoBasicBlock, 1);
target->cil_code = ip + i;
g_ptr_array_add (result, target);
g_hash_table_insert (table, (char*)ip + i, target);
}
link_bblock (bb, target);
block_end = 1;
break;
case MonoInlineSwitch: {
gint32 n;
const char *itarget, *st;
++ip;
n = read32 (ip);
ip += 4;
st = (const char*)ip + 4 * n;
for (i = 0; i < n; i++) {
itarget = st + read32 (ip);
ip += 4;
if (!(target = g_hash_table_lookup (table, itarget))) {
target = g_new0 (MonoBasicBlock, 1);
target->cil_code = (const guchar*)itarget;
g_ptr_array_add (result, target);
g_hash_table_insert (table, (gpointer) itarget, target);
}
link_bblock (bb, target);
}
/*
* Note: the code didn't set block_end in switch.
*/
break;
}
case MonoInlineR:
case MonoInlineI8:
ip += 9;
break;
default:
g_assert_not_reached ();
}
}
g_hash_table_destroy (table);
qsort (result->pdata, result->len, sizeof (gpointer), compare_bblock);
/* skip entry and end */
bb = target = NULL;
for (i = 2; i < result->len; ++i) {
bb = (MonoBasicBlock*)g_ptr_array_index (result, i);
if (target)
target->cil_length = bb->cil_code - target->cil_code;
target = bb;
/*fprintf (stderr, "bblock %d at IL_%04x:\n", i, bb->cil_code - header->code);*/
}
bb->cil_length = end - bb->cil_code;
return result;
}
static char*
indenter (MonoDisHelper *dh, MonoMethod *method, guint32 ip_offset)
{
return g_strdup (" ");
}
static MonoDisHelper graph_dh = {
"\\l",
NULL,
"IL_%04x",
indenter,
NULL,
NULL
};
static void
df_visit (MonoBasicBlock *bb, int *dfn, const unsigned char* code)
{
GList *tmp;
MonoBasicBlock *next;
if (bb->dfn)
return;
++(*dfn);
bb->dfn = *dfn;
for (tmp = bb->out_bb; tmp; tmp = tmp->next) {
next = tmp->data;
if (!next->dfn) {
if (!bb->cil_code)
fprintf (output, "\t\"DF entry\" -> \"IL_%04x (%d)\"\n", (unsigned int)(next->cil_code - code), *dfn + 1);
else
fprintf (output, "\t\"IL_%04x (%d)\" -> \"IL_%04x (%d)\"\n", (unsigned int)(bb->cil_code - code), bb->dfn, (unsigned int)(next->cil_code - code), *dfn + 1);
df_visit (next, dfn, code);
}
}
}
static void
print_method_cfg (MonoMethod *method) {
GPtrArray *bblocks;
GList *tmp;
MonoBasicBlock *bb, *target;
MonoMethodHeader *header;
int i, dfn;
char *code;
const unsigned char *il_code;
header = mono_method_get_header (method);
il_code = mono_method_header_get_code (header, NULL, NULL);
bblocks = mono_method_find_bblocks (header);
for (i = 0; i < bblocks->len; ++i) {
bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
if (i == 0)
fprintf (output, "\tB%p [shape=record,label=\"entry\"]\n", bb);
else if (i == 1)
fprintf (output, "\tB%p [shape=record,label=\"end\"]\n", bb);
else {
code = mono_disasm_code (&graph_dh, method, bb->cil_code, bb->cil_code + bb->cil_length);
fprintf (output, "\tB%p [shape=record,label=\"IL_%04x\\n%s\"]\n", bb, (unsigned int)(bb->cil_code - il_code), code);
g_free (code);
}
}
for (i = 0; i < bblocks->len; ++i) {
bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
for (tmp = bb->out_bb; tmp; tmp = tmp->next) {
target = tmp->data;
fprintf (output, "\tB%p -> B%p\n", bb, target);
}
}
#if 1
for (i = 0; i < bblocks->len; ++i) {
bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
bb->dfn = 0;
}
dfn = 0;
for (i = 0; i < bblocks->len; ++i) {
bb = (MonoBasicBlock*)g_ptr_array_index (bblocks, i);
df_visit (bb, &dfn, il_code);
}
#endif
}
/*
* TODO: change to create the DF tree, dominance relation etc.
*/
static void
method_cfg (MonoImage *image, const char *name) {
MonoMethod *method = NULL;
const static char *cfg_graph_properties = "\tnode [fontsize=8.0]\n\tedge [len=1.5,color=red]\n";
if (!name) {
guint32 token = mono_image_get_entry_point (image);