varun-r-mallya/sysprof
1
0
Fork 0
mirror of https://github.com/varun-r-mallya/sysprof.git synced 2025-12-31 20:36:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

libsysprof-analyze: track frame length

Browse Source 
That way we don't have to decode this too in the subclasses.
This commit is contained in:
Christian Hergert
2023-04-25 17:09:04 -07:00
parent 62863f08c3
commit 97c93ea965
3 changed files with 30 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/libsysprof-analyze/sysprof-document-frame-private.h
View File

@ -28,10 +28,12 @@ G_BEGIN_DECLS
struct _SysprofDocumentFrame
{
GObject parent_instance;
GObject parent;
GMappedFile *mapped_file;
const SysprofCaptureFrame *frame;
guint needs_swap : 1;
guint32 frame_len : 16;
guint32 needs_swap : 1;
guint32 padding : 15;
};
struct _SysprofDocumentFrameClass
@ -41,6 +43,7 @@ struct _SysprofDocumentFrameClass
SysprofDocumentFrame *_sysprof_document_frame_new (GMappedFile *mapped,
const SysprofCaptureFrame *frame,
guint16 frame_len,
gboolean needs_swap);
#define SYSPROF_DOCUMENT_FRAME_GET(obj, type) \

2
src/libsysprof-analyze/sysprof-document-frame.c
View File

@ -114,6 +114,7 @@ sysprof_document_frame_init (SysprofDocumentFrame *self)
SysprofDocumentFrame *
_sysprof_document_frame_new (GMappedFile *mapped_file,
const SysprofCaptureFrame *frame,
guint16 frame_len,
gboolean needs_swap)
{
SysprofDocumentFrame *self;
@ -122,6 +123,7 @@ _sysprof_document_frame_new (GMappedFile *mapped_file,
self->mapped_file = g_mapped_file_ref (mapped_file);
self->frame = frame;
self->frame_len = frame_len;
self->needs_swap = !!needs_swap;
return self;

33
src/libsysprof-analyze/sysprof-document.c
View File

@ -30,12 +30,19 @@
struct _SysprofDocument
{
GObject parent_instance;
GPtrArray *frames;
GArray *frames;
GMappedFile *mapped_file;
const guint8 *base;
SysprofCaptureFileHeader header;
guint needs_swap : 1;
};
typedef struct _SysprofDocumentFramePointer
{
guint64 offset : 48;
guint64 length : 16;
} SysprofDocumentFramePointer;
static GType
sysprof_document_get_item_type (GListModel *model)
{
@ -50,15 +57,19 @@ sysprof_document_get_n_items (GListModel *model)
static gpointer
sysprof_document_get_item (GListModel *model,
guint position)
guint position)
{
SysprofDocument *self = SYSPROF_DOCUMENT (model);
SysprofDocumentFramePointer *ptr;
if (position >= self->frames->len)
return NULL;
ptr = &g_array_index (self->frames, SysprofDocumentFramePointer, position);
return _sysprof_document_frame_new (self->mapped_file,
g_ptr_array_index (self->frames, position),
(gconstpointer)&self->base[ptr->offset],
ptr->length,
self->needs_swap);
}
@ -79,7 +90,7 @@ sysprof_document_finalize (GObject *object)
SysprofDocument *self = (SysprofDocument *)object;
g_clear_pointer (&self->mapped_file, g_mapped_file_unref);
g_clear_pointer (&self->frames, g_ptr_array_unref);
g_clear_pointer (&self->frames, g_array_unref);
G_OBJECT_CLASS (sysprof_document_parent_class)->finalize (object);
}
@ -94,7 +105,7 @@ sysprof_document_class_init (SysprofDocumentClass *klass)
static void
sysprof_document_init (SysprofDocument *self)
{
self->frames = g_ptr_array_new ();
self->frames = g_array_new (FALSE, FALSE, sizeof (SysprofDocumentFramePointer));
}
static gboolean
@ -102,7 +113,6 @@ sysprof_document_load (SysprofDocument *self,
int capture_fd,
GError **error)
{
const guint8 *data;
goffset pos;
gsize len;
@ -112,14 +122,14 @@ sysprof_document_load (SysprofDocument *self,
if (!(self->mapped_file = g_mapped_file_new_from_fd (capture_fd, FALSE, error)))
return FALSE;
data = (const guint8 *)g_mapped_file_get_contents (self->mapped_file);
self->base = (const guint8 *)g_mapped_file_get_contents (self->mapped_file);
len = g_mapped_file_get_length (self->mapped_file);
if (len < sizeof self->header)
return FALSE;
/* Keep a copy of our header */
memcpy (&self->header, data, sizeof self->header);
memcpy (&self->header, self->base, sizeof self->header);
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
self->needs_swap = !self->header.little_endian;
#else
@ -135,16 +145,19 @@ sysprof_document_load (SysprofDocument *self,
pos = sizeof self->header;
while (pos < (len - sizeof(guint16)))
{
SysprofDocumentFramePointer ptr;
guint16 frame_len;
memcpy (&frame_len, &data[pos], sizeof frame_len);
memcpy (&frame_len, &self->base[pos], sizeof frame_len);
if (self->needs_swap)
frame_len = GUINT16_SWAP_LE_BE (frame_len);
if (frame_len < sizeof (SysprofCaptureFrame))
break;
g_ptr_array_add (self->frames, (gpointer)&data[pos]);
ptr.offset = pos;
ptr.length = frame_len;
g_array_append_val (self->frames, ptr);
pos += frame_len;
}