-/*
- * debug-mono-ppdb.c: Support for the portable PDB symbol
+/**
+ * \file
+ * Support for the portable PDB symbol
* file format
*
*
* Mono Project (http://www.mono-project.com)
*
* Copyright 2015 Xamarin Inc (http://www.xamarin.com)
+ * Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
#include <config.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/mono-debug.h>
-#include <mono/metadata/debug-mono-symfile.h>
-#include <mono/metadata/mono-debug-debugger.h>
+#include <mono/metadata/debug-internals.h>
#include <mono/metadata/mono-endian.h>
#include <mono/metadata/metadata-internals.h>
#include <mono/metadata/class-internals.h>
+#include <mono/metadata/cil-coff.h>
+#include <mono/utils/bsearch.h>
#include "debug-mono-ppdb.h"
struct _MonoPPDBFile {
MonoImage *image;
- GHashTable *doc_cache;
+ GHashTable *doc_hash;
+ GHashTable *method_hash;
};
+/* IMAGE_DEBUG_DIRECTORY structure */
+typedef struct
+{
+ gint32 characteristics;
+ gint32 time_date_stamp;
+ gint16 major_version;
+ gint16 minor_version;
+ gint32 type;
+ gint32 size_of_data;
+ gint32 address;
+ gint32 pointer;
+} ImageDebugDirectory;
+
+typedef struct {
+ gint32 signature;
+ guint8 guid [16];
+ gint32 age;
+} CodeviewDebugDirectory;
+
+typedef struct {
+ guint8 guid [20];
+ guint32 entry_point;
+ guint64 referenced_tables;
+} PdbStreamHeader;
+
+static gboolean
+get_pe_debug_guid (MonoImage *image, guint8 *out_guid, gint32 *out_age, gint32 *out_timestamp)
+{
+ MonoPEDirEntry *debug_dir_entry;
+ ImageDebugDirectory *debug_dir;
+
+ debug_dir_entry = &((MonoCLIImageInfo*)image->image_info)->cli_header.datadir.pe_debug;
+ if (!debug_dir_entry->size)
+ return FALSE;
+
+ int offset = mono_cli_rva_image_map (image, debug_dir_entry->rva);
+ debug_dir = (ImageDebugDirectory*)(image->raw_data + offset);
+ if (debug_dir->type == 2 && debug_dir->major_version == 0x100 && debug_dir->minor_version == 0x504d) {
+ /* This is a 'CODEVIEW' debug directory */
+ CodeviewDebugDirectory *dir = (CodeviewDebugDirectory*)(image->raw_data + debug_dir->pointer);
+
+ if (dir->signature == 0x53445352) {
+ memcpy (out_guid, dir->guid, 16);
+ *out_age = dir->age;
+ *out_timestamp = debug_dir->time_date_stamp;
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+static void
+doc_free (gpointer key)
+{
+ MonoDebugSourceInfo *info = (MonoDebugSourceInfo *)key;
+
+ g_free (info->source_file);
+ g_free (info);
+}
+
+static MonoPPDBFile*
+create_ppdb_file (MonoImage *ppdb_image)
+{
+ MonoPPDBFile *ppdb;
+
+ ppdb = g_new0 (MonoPPDBFile, 1);
+ ppdb->image = ppdb_image;
+ ppdb->doc_hash = g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify) doc_free);
+ ppdb->method_hash = g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify) g_free);
+ return ppdb;
+}
+
MonoPPDBFile*
-mono_ppdb_load_file (MonoImage *image)
+mono_ppdb_load_file (MonoImage *image, const guint8 *raw_contents, int size)
{
- MonoImage *ppdb_image;
+ MonoImage *ppdb_image = NULL;
const char *filename;
char *s, *ppdb_filename;
MonoImageOpenStatus status;
- MonoTableInfo *tables;
- guint32 cols [MONO_MODULE_SIZE];
- const char *guid, *ppdb_guid;
- MonoPPDBFile *ppdb;
+ guint8 pe_guid [16];
+ gint32 pe_age;
+ gint32 pe_timestamp;
+
+ if (image->tables [MONO_TABLE_DOCUMENT].rows) {
+ /* Embedded ppdb */
+ mono_image_addref (image);
+ return create_ppdb_file (image);
+ }
+
+ if (!get_pe_debug_guid (image, pe_guid, &pe_age, &pe_timestamp))
+ return NULL;
- /* ppdb files drop the .exe/.dll extension */
- filename = mono_image_get_filename (image);
- if (strlen (filename) > 4 && (!strcmp (filename + strlen (filename) - 4, ".exe"))) {
- s = g_strdup (filename);
- s [strlen (filename) - 4] = '\0';
- ppdb_filename = g_strdup_printf ("%s.pdb", s);
- g_free (s);
+ if (raw_contents) {
+ if (size > 4 && strncmp ((char*)raw_contents, "BSJB", 4) == 0)
+ ppdb_image = mono_image_open_from_data_internal ((char*)raw_contents, size, TRUE, &status, FALSE, TRUE, NULL);
} else {
- ppdb_filename = g_strdup_printf ("%s.pdb", filename);
- }
+ /* ppdb files drop the .exe/.dll extension */
+ filename = mono_image_get_filename (image);
+ if (strlen (filename) > 4 && (!strcmp (filename + strlen (filename) - 4, ".exe") || !strcmp (filename + strlen (filename) - 4, ".dll"))) {
+ s = g_strdup (filename);
+ s [strlen (filename) - 4] = '\0';
+ ppdb_filename = g_strdup_printf ("%s.pdb", s);
+ g_free (s);
+ } else {
+ ppdb_filename = g_strdup_printf ("%s.pdb", filename);
+ }
- ppdb_image = mono_image_open_metadata_only (ppdb_filename, &status);
+ ppdb_image = mono_image_open_metadata_only (ppdb_filename, &status);
+ if (!ppdb_image)
+ g_free (ppdb_filename);
+ }
if (!ppdb_image)
return NULL;
- /* Check that the images match */
- tables = image->tables;
- g_assert (tables [MONO_TABLE_MODULE].rows);
- mono_metadata_decode_row (&tables [MONO_TABLE_MODULE], 0, cols, MONO_MODULE_SIZE);
- guid = mono_metadata_guid_heap (image, cols [MONO_MODULE_MVID]);
+ /*
+ * Check that the images match.
+ * The same id is stored in the Debug Directory of the PE file, and in the
+ * #Pdb stream in the ppdb file.
+ */
+ PdbStreamHeader *pdb_stream = (PdbStreamHeader*)ppdb_image->heap_pdb.data;
- tables = ppdb_image->tables;
- g_assert (tables [MONO_TABLE_MODULE].rows);
- mono_metadata_decode_row (&tables [MONO_TABLE_MODULE], 0, cols, MONO_MODULE_SIZE);
- ppdb_guid = mono_metadata_guid_heap (ppdb_image, cols [MONO_MODULE_MVID]);
+ g_assert (pdb_stream);
- if (memcmp (guid, ppdb_guid, 16) != 0) {
+ /* The pdb id is a concentation of the pe guid and the timestamp */
+ if (memcmp (pe_guid, pdb_stream->guid, 16) != 0 || memcmp (&pe_timestamp, pdb_stream->guid + 16, 4) != 0) {
g_warning ("Symbol file %s doesn't match image %s", ppdb_image->name,
image->name);
mono_image_close (ppdb_image);
return NULL;
}
- ppdb = g_new0 (MonoPPDBFile, 1);
- ppdb->image = ppdb_image;
-
- return ppdb;
+ return create_ppdb_file (ppdb_image);
}
void
MonoPPDBFile *ppdb = handle->ppdb;
mono_image_close (ppdb->image);
- if (ppdb->doc_cache)
- g_hash_table_destroy (ppdb->doc_cache);
+ g_hash_table_destroy (ppdb->doc_hash);
+ g_hash_table_destroy (ppdb->method_hash);
g_free (ppdb);
}
mono_ppdb_lookup_method (MonoDebugHandle *handle, MonoMethod *method)
{
MonoDebugMethodInfo *minfo;
+ MonoPPDBFile *ppdb = handle->ppdb;
if (handle->image != mono_class_get_image (mono_method_get_class (method)))
return NULL;
- // FIXME: Cache
+ mono_debugger_lock ();
- // FIXME: Methods without tokens
+ minfo = (MonoDebugMethodInfo *)g_hash_table_lookup (ppdb->method_hash, method);
+ if (minfo) {
+ mono_debugger_unlock ();
+ return minfo;
+ }
minfo = g_new0 (MonoDebugMethodInfo, 1);
minfo->index = 0;
minfo->method = method;
minfo->handle = handle;
+ g_hash_table_insert (ppdb->method_hash, method, minfo);
+
+ mono_debugger_unlock ();
+
return minfo;
}
int size, part_size, partidx, nparts;
char sep;
GString *s;
- MonoDebugSourceInfo *res;
+ MonoDebugSourceInfo *res, *cached;
- // FIXME: Cache
+ mono_debugger_lock ();
+ cached = (MonoDebugSourceInfo *)g_hash_table_lookup (ppdb->doc_hash, GUINT_TO_POINTER (docidx));
+ mono_debugger_unlock ();
+ if (cached)
+ return cached;
mono_metadata_decode_row (&tables [MONO_TABLE_DOCUMENT], docidx-1, cols, MONO_DOCUMENT_SIZE);
res->guid = NULL;
res->hash = (guint8*)mono_metadata_blob_heap (image, cols [MONO_DOCUMENT_HASH]);
+ mono_debugger_lock ();
+ cached = (MonoDebugSourceInfo *)g_hash_table_lookup (ppdb->doc_hash, GUINT_TO_POINTER (docidx));
+ if (!cached) {
+ g_hash_table_insert (ppdb->doc_hash, GUINT_TO_POINTER (docidx), res);
+ } else {
+ doc_free (res);
+ res = cached;
+ }
+ mono_debugger_unlock ();
return res;
}
/**
* mono_ppdb_lookup_location:
- * @minfo: A `MonoDebugMethodInfo' which can be retrieved by
- * mono_debug_lookup_method().
- * @offset: IL offset within the corresponding method's CIL code.
+ * \param minfo A \c MonoDebugMethodInfo which can be retrieved by mono_debug_lookup_method().
+ * \param offset IL offset within the corresponding method's CIL code.
*
* This function is similar to mono_debug_lookup_location(), but we
* already looked up the method and also already did the
- * `native address -> IL offset' mapping.
+ * native address -> IL offset mapping.
*/
MonoDebugSourceLocation *
mono_ppdb_lookup_location (MonoDebugMethodInfo *minfo, uint32_t offset)
const char *end;
char *docname;
int idx, size, docidx, iloffset, delta_il, delta_lines, delta_cols, start_line, start_col, adv_line, adv_col;
+ gboolean first = TRUE, first_non_hidden = TRUE;
MonoDebugSourceLocation *location;
- g_assert (method->token);
+ if (!method->token)
+ return NULL;
idx = mono_metadata_token_index (method->token);
mono_metadata_decode_row (&tables [MONO_TABLE_METHODBODY], idx-1, cols, MONO_METHODBODY_SIZE);
- // FIXME:
- g_assert (cols [MONO_METHODBODY_SEQ_POINTS]);
+ docidx = cols [MONO_METHODBODY_DOCUMENT];
+ if (!cols [MONO_METHODBODY_SEQ_POINTS])
+ return NULL;
ptr = mono_metadata_blob_heap (image, cols [MONO_METHODBODY_SEQ_POINTS]);
size = mono_metadata_decode_blob_size (ptr, &ptr);
end = ptr + size;
- /* First record */
- docidx = mono_metadata_decode_value (ptr, &ptr);
+ /* Header */
+ /* LocalSignature */
+ mono_metadata_decode_value (ptr, &ptr);
+ if (docidx == 0)
+ docidx = mono_metadata_decode_value (ptr, &ptr);
docname = get_docname (ppdb, image, docidx);
- iloffset = mono_metadata_decode_value (ptr, &ptr);
- delta_lines = mono_metadata_decode_value (ptr, &ptr);
- if (delta_lines == 0)
- delta_cols = mono_metadata_decode_value (ptr, &ptr);
- else
- delta_cols = mono_metadata_decode_signed_value (ptr, &ptr);
- start_line = mono_metadata_decode_value (ptr, &ptr);
- start_col = mono_metadata_decode_value (ptr, &ptr);
+ iloffset = 0;
+ start_line = 0;
+ start_col = 0;
while (ptr < end) {
- if (iloffset > offset)
- break;
-
delta_il = mono_metadata_decode_value (ptr, &ptr);
- if (delta_il == 0)
- // FIXME:
- g_assert_not_reached ();
+ if (!first && delta_il == 0) {
+ /* document-record */
+ docidx = mono_metadata_decode_value (ptr, &ptr);
+ docname = get_docname (ppdb, image, docidx);
+ continue;
+ }
+ if (!first && iloffset + delta_il > offset)
+ break;
+ iloffset += delta_il;
+ first = FALSE;
delta_lines = mono_metadata_decode_value (ptr, &ptr);
if (delta_lines == 0)
else
delta_cols = mono_metadata_decode_signed_value (ptr, &ptr);
if (delta_lines == 0 && delta_cols == 0)
- // FIXME:
- g_assert_not_reached ();
- adv_line = mono_metadata_decode_signed_value (ptr, &ptr);
- adv_col = mono_metadata_decode_signed_value (ptr, &ptr);
-
- if (iloffset + delta_il > offset)
- break;
-
- iloffset += delta_il;
- start_line += adv_line;
- start_col += adv_col;
+ /* hidden-sequence-point-record */
+ continue;
+ if (first_non_hidden) {
+ start_line = mono_metadata_decode_value (ptr, &ptr);
+ start_col = mono_metadata_decode_value (ptr, &ptr);
+ } else {
+ adv_line = mono_metadata_decode_signed_value (ptr, &ptr);
+ adv_col = mono_metadata_decode_signed_value (ptr, &ptr);
+ start_line += adv_line;
+ start_col += adv_col;
+ }
+ first_non_hidden = FALSE;
}
location = g_new0 (MonoDebugSourceLocation, 1);
const char *end;
MonoDebugSourceInfo *docinfo;
int i, method_idx, size, docidx, iloffset, delta_il, delta_lines, delta_cols, start_line, start_col, adv_line, adv_col;
+ gboolean first = TRUE, first_non_hidden = TRUE;
GArray *sps;
MonoSymSeqPoint sp;
GPtrArray *sfiles = NULL;
mono_metadata_decode_row (&tables [MONO_TABLE_METHODBODY], method_idx-1, cols, MONO_METHODBODY_SIZE);
+ docidx = cols [MONO_METHODBODY_DOCUMENT];
+
if (!cols [MONO_METHODBODY_SEQ_POINTS])
return;
sps = g_array_new (FALSE, TRUE, sizeof (MonoSymSeqPoint));
- /* First record */
- docidx = mono_metadata_decode_value (ptr, &ptr);
+ /* Header */
+ /* LocalSignature */
+ mono_metadata_decode_value (ptr, &ptr);
+ if (docidx == 0)
+ docidx = mono_metadata_decode_value (ptr, &ptr);
docinfo = get_docinfo (ppdb, image, docidx);
- iloffset = mono_metadata_decode_value (ptr, &ptr);
- delta_lines = mono_metadata_decode_value (ptr, &ptr);
- if (delta_lines == 0)
- delta_cols = mono_metadata_decode_value (ptr, &ptr);
- else
- delta_cols = mono_metadata_decode_signed_value (ptr, &ptr);
- start_line = mono_metadata_decode_value (ptr, &ptr);
- start_col = mono_metadata_decode_value (ptr, &ptr);
if (sfiles)
g_ptr_array_add (sfiles, docinfo);
- if (source_files)
- g_ptr_array_add (sindexes, GUINT_TO_POINTER (sfiles->len - 1));
- memset (&sp, 0, sizeof (sp));
- sp.il_offset = iloffset;
- sp.line = start_line;
- sp.column = start_col;
- sp.end_line = start_line + delta_lines;
- sp.end_column = start_col + delta_cols;
-
- g_array_append_val (sps, sp);
+ if (source_file)
+ *source_file = g_strdup (docinfo->source_file);
+ iloffset = 0;
+ start_line = 0;
+ start_col = 0;
while (ptr < end) {
delta_il = mono_metadata_decode_value (ptr, &ptr);
- if (delta_il == 0) {
+ if (!first && delta_il == 0) {
/* subsequent-document-record */
docidx = mono_metadata_decode_value (ptr, &ptr);
docinfo = get_docinfo (ppdb, image, docidx);
g_ptr_array_add (sfiles, docinfo);
continue;
}
+ iloffset += delta_il;
+ first = FALSE;
+
delta_lines = mono_metadata_decode_value (ptr, &ptr);
if (delta_lines == 0)
delta_cols = mono_metadata_decode_value (ptr, &ptr);
if (delta_lines == 0 && delta_cols == 0) {
/* Hidden sequence point */
- // FIXME: This seems to be followed by garbage
continue;
}
- adv_line = mono_metadata_decode_signed_value (ptr, &ptr);
- adv_col = mono_metadata_decode_signed_value (ptr, &ptr);
-
- iloffset += delta_il;
- start_line += adv_line;
- start_col += adv_col;
+ if (first_non_hidden) {
+ start_line = mono_metadata_decode_value (ptr, &ptr);
+ start_col = mono_metadata_decode_value (ptr, &ptr);
+ } else {
+ adv_line = mono_metadata_decode_signed_value (ptr, &ptr);
+ adv_col = mono_metadata_decode_signed_value (ptr, &ptr);
+ start_line += adv_line;
+ start_col += adv_col;
+ }
+ first_non_hidden = FALSE;
memset (&sp, 0, sizeof (sp));
sp.il_offset = iloffset;
memcpy (*seq_points, sps->data, sps->len * sizeof (MonoSymSeqPoint));
}
- if (source_file)
- *source_file = g_strdup (((MonoDebugSourceInfo*)g_ptr_array_index (sfiles, 0))->source_file);
if (source_files) {
*source_files = g_new (int, sps->len);
for (i = 0; i < sps->len; ++i)
scope_idx = start_scope_idx;
mono_metadata_decode_row (&tables [MONO_TABLE_LOCALSCOPE], scope_idx-1, cols, MONO_LOCALSCOPE_SIZE);
locals_idx = cols [MONO_LOCALSCOPE_VARIABLELIST];
- while (TRUE) {
+
+ // https://github.com/dotnet/roslyn/blob/2ae8d5fed96ab3f1164031f9b4ac827f53289159/docs/specs/PortablePdb-Metadata.md#LocalScopeTable
+ //
+ // The variableList attribute in the pdb metadata table is a contiguous array that starts at a
+ // given offset (locals_idx) above and
+ //
+ // """
+ // continues to the smaller of:
+ //
+ // the last row of the LocalVariable table
+ // the next run of LocalVariables, found by inspecting the VariableList of the next row in this LocalScope table.
+ // """
+ // this endpoint becomes locals_end_idx below
+
+ // March to the last scope that is in this method
+ while (scope_idx <= tables [MONO_TABLE_LOCALSCOPE].rows) {
mono_metadata_decode_row (&tables [MONO_TABLE_LOCALSCOPE], scope_idx-1, cols, MONO_LOCALSCOPE_SIZE);
if (cols [MONO_LOCALSCOPE_METHOD] != method_idx)
break;
scope_idx ++;
}
+ // The number of scopes is the difference in the indices
+ // for the first and last scopes
nscopes = scope_idx - start_scope_idx;
- if (scope_idx == tables [MONO_TABLE_LOCALSCOPE].rows) {
- // FIXME:
- g_assert_not_reached ();
- locals_end_idx = -1;
+
+ // Ends with "the last row of the LocalVariable table"
+ // this happens if the above loop marched one past the end
+ // of the rows
+ if (scope_idx > tables [MONO_TABLE_LOCALSCOPE].rows) {
+ locals_end_idx = tables [MONO_TABLE_LOCALVARIABLE].rows + 1;
} else {
+ // Ends with "the next run of LocalVariables,
+ // found by inspecting the VariableList of the next row in this LocalScope table."
locals_end_idx = cols [MONO_LOCALSCOPE_VARIABLELIST];
}
locals_idx = cols [MONO_LOCALSCOPE_VARIABLELIST];
if (scope_idx == tables [MONO_TABLE_LOCALSCOPE].rows) {
- // FIXME:
- g_assert_not_reached ();
+ locals_end_idx = tables [MONO_TABLE_LOCALVARIABLE].rows + 1;
} else {
locals_end_idx = mono_metadata_decode_row_col (&tables [MONO_TABLE_LOCALSCOPE], scope_idx-1 + 1, MONO_LOCALSCOPE_VARIABLELIST);
}
return res;
}
+
+/*
+* We use this to pass context information to the row locator
+*/
+typedef struct {
+ int idx; /* The index that we are trying to locate */
+ int col_idx; /* The index in the row where idx may be stored */
+ MonoTableInfo *t; /* pointer to the table */
+ guint32 result;
+} locator_t;
+
+static int
+table_locator (const void *a, const void *b)
+{
+ locator_t *loc = (locator_t *)a;
+ const char *bb = (const char *)b;
+ guint32 table_index = (bb - loc->t->base) / loc->t->row_size;
+ guint32 col;
+
+ col = mono_metadata_decode_row_col(loc->t, table_index, loc->col_idx);
+
+ if (loc->idx == col) {
+ loc->result = table_index;
+ return 0;
+ }
+ if (loc->idx < col)
+ return -1;
+ else
+ return 1;
+}
+
+static gboolean
+compare_guid (guint8* guid1, guint8* guid2) {
+ for (int i = 0; i < 16; i++) {
+ if (guid1 [i] != guid2 [i])
+ return FALSE;
+ }
+ return TRUE;
+}
+
+// for parent_type see HasCustomDebugInformation table at
+// https://github.com/dotnet/corefx/blob/master/src/System.Reflection.Metadata/specs/PortablePdb-Metadata.md
+static const char*
+lookup_custom_debug_information (MonoImage* image, guint32 token, uint8_t parent_type, guint8* guid)
+{
+ MonoTableInfo *tables = image->tables;
+ MonoTableInfo *table = &tables[MONO_TABLE_CUSTOMDEBUGINFORMATION];
+ locator_t loc;
+
+ if (!table->base)
+ return 0;
+
+ loc.idx = (mono_metadata_token_index (token) << 5) | parent_type;
+ loc.col_idx = MONO_CUSTOMDEBUGINFORMATION_PARENT;
+ loc.t = table;
+
+ if (!mono_binary_search (&loc, table->base, table->rows, table->row_size, table_locator))
+ return NULL;
+ // Great we found one of possibly many CustomDebugInformations of this entity they are distinguished by KIND guid
+ // First try on this index found by binary search...(it's most likeley to be only one and binary search found the one we want)
+ if (compare_guid (guid, (guint8*)mono_metadata_guid_heap (image, mono_metadata_decode_row_col (table, loc.result, MONO_CUSTOMDEBUGINFORMATION_KIND))))
+ return mono_metadata_blob_heap (image, mono_metadata_decode_row_col (table, loc.result, MONO_CUSTOMDEBUGINFORMATION_VALUE));
+
+ // Move forward from binary found index, until parent token differs
+ for (int i = loc.result + 1; i < table->rows; i++)
+ {
+ if (mono_metadata_decode_row_col (table, i, MONO_CUSTOMDEBUGINFORMATION_PARENT) != loc.idx)
+ break;
+ if (compare_guid (guid, (guint8*)mono_metadata_guid_heap (image, mono_metadata_decode_row_col (table, i, MONO_CUSTOMDEBUGINFORMATION_KIND))))
+ return mono_metadata_blob_heap (image, mono_metadata_decode_row_col (table, i, MONO_CUSTOMDEBUGINFORMATION_VALUE));
+ }
+
+ // Move backward from binary found index, until parent token differs
+ for (int i = loc.result - 1; i >= 0; i--) {
+ if (mono_metadata_decode_row_col (table, i, MONO_CUSTOMDEBUGINFORMATION_PARENT) != loc.idx)
+ break;
+ if (compare_guid (guid, (guint8*)mono_metadata_guid_heap (image, mono_metadata_decode_row_col (table, i, MONO_CUSTOMDEBUGINFORMATION_KIND))))
+ return mono_metadata_blob_heap (image, mono_metadata_decode_row_col (table, i, MONO_CUSTOMDEBUGINFORMATION_VALUE));
+ }
+ return NULL;
+}
+
+MonoDebugMethodAsyncInfo*
+mono_ppdb_lookup_method_async_debug_info (MonoDebugMethodInfo *minfo)
+{
+ MonoMethod *method = minfo->method;
+ MonoPPDBFile *ppdb = minfo->handle->ppdb;
+ MonoImage *image = ppdb->image;
+
+ // Guid is taken from Roslyn source code:
+ // https://github.com/dotnet/roslyn/blob/1ad4b58/src/Dependencies/CodeAnalysis.Metadata/PortableCustomDebugInfoKinds.cs#L9
+ guint8 async_method_stepping_information_guid [16] = { 0xC5, 0x2A, 0xFD, 0x54, 0x25, 0xE9, 0x1A, 0x40, 0x9C, 0x2A, 0xF9, 0x4F, 0x17, 0x10, 0x72, 0xF8 };
+ char const *blob = lookup_custom_debug_information (image, method->token, 0, async_method_stepping_information_guid);
+ if (!blob)
+ return NULL;
+ int blob_len = mono_metadata_decode_blob_size (blob, &blob);
+ MonoDebugMethodAsyncInfo* res = g_new0 (MonoDebugMethodAsyncInfo, 1);
+ char const *pointer = blob;
+
+ // Format of this blob is taken from Roslyn source code:
+ // https://github.com/dotnet/roslyn/blob/1ad4b58/src/Compilers/Core/Portable/PEWriter/MetadataWriter.PortablePdb.cs#L566
+
+ pointer += 4;//catch_handler_offset
+ while (pointer - blob < blob_len) {
+ res->num_awaits++;
+ pointer += 8;//yield_offsets+resume_offsets
+ mono_metadata_decode_value (pointer, &pointer);//move_next_method_token
+ }
+ g_assert(pointer - blob == blob_len); //Check that we used all blob data
+ pointer = blob; //reset pointer after we figured num_awaits
+
+ res->yield_offsets = g_new (uint32_t, res->num_awaits);
+ res->resume_offsets = g_new (uint32_t, res->num_awaits);
+ res->move_next_method_token = g_new (uint32_t, res->num_awaits);
+
+ res->catch_handler_offset = read32 (pointer); pointer += 4;
+ for (int i = 0; i < res->num_awaits; i++) {
+ res->yield_offsets [i] = read32 (pointer); pointer += 4;
+ res->resume_offsets [i] = read32 (pointer); pointer += 4;
+ res->move_next_method_token [i] = mono_metadata_decode_value (pointer, &pointer);
+ }
+ return res;
+}
projects / mono.git / blobdiff