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

capture: fix sysprof_capture_reader_list_files()

Browse Source 
This needs to stash the string pointers internally so that we can maintain
ABI and still fix the issue at hand.

Fixes #50
This commit is contained in:
Christian Hergert
2020-09-28 15:53:54 -07:00
parent 254b9f8f69
commit 28bb526603
1 changed files with 44 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
src/libsysprof-capture/sysprof-capture-reader.c
View File

@ -88,6 +88,8 @@ struct _SysprofCaptureReader
int64_t end_time;
SysprofCaptureStat st_buf;
unsigned int st_buf_set : 1;
char **list_files;
size_t n_list_files;
};
/* Sets @errno on failure. Sets @errno to EBADMSG if the file magic doesn’t
@ -1276,7 +1278,7 @@ array_append (const char ***files,
*files = new_files;
}
(*files)[*n_files] = new_element;
(*files)[*n_files] = new_element ? strdup (new_element) : NULL;
*n_files = *n_files + 1;
assert (*n_files <= *n_files_allocated);
@ -1304,6 +1306,16 @@ array_deduplicate (const char **files,
*n_files = last_written + 1;
}
static int
compare_strings (const void *a,
const void *b)
{
const char * const *astr = a;
const char * const *bstr = b;
return strcmp (*astr, *bstr);
}
const char **
sysprof_capture_reader_list_files (SysprofCaptureReader *self)
{
@ -1313,38 +1325,49 @@ sysprof_capture_reader_list_files (SysprofCaptureReader *self)
assert (self != NULL);
while (sysprof_capture_reader_peek_type (self, &type))
/* Only generate the list of files once */
if (self->list_files == NULL)
{
const SysprofCaptureFileChunk *file;
if (type != SYSPROF_CAPTURE_FRAME_FILE_CHUNK)
while (sysprof_capture_reader_peek_type (self, &type))
{
sysprof_capture_reader_skip (self);
continue;
const SysprofCaptureFileChunk *file;
if (type != SYSPROF_CAPTURE_FRAME_FILE_CHUNK)
{
sysprof_capture_reader_skip (self);
continue;
}
if (!(file = sysprof_capture_reader_read_file (self)))
break;
if (!array_append (&files, &n_files, &n_files_allocated, file->path))
{
free (files);
errno = ENOMEM;
return NULL;
}
}
if (!(file = sysprof_capture_reader_read_file (self)))
break;
/* Sort and deduplicate the files array. */
qsort (files, n_files, sizeof (*files), compare_strings);
array_deduplicate (files, &n_files);
if (!array_append (&files, &n_files, &n_files_allocated, file->path))
/* Add a null terminator */
if (!array_append (&files, &n_files, &n_files_allocated, NULL))
{
free (files);
errno = ENOMEM;
return NULL;
}
self->list_files = (char **)sysprof_steal_pointer (&files);
self->n_list_files = n_files; /* including NULL */
}
/* Sort and deduplicate the files array. */
qsort (files, n_files, sizeof (*files), (int (*)(const void *, const void *)) strcmp);
array_deduplicate (files, &n_files);
/* Add a null terminator */
if (!array_append (&files, &n_files, &n_files_allocated, NULL))
{
free (files);
errno = ENOMEM;
return NULL;
}
/* Now copy the list but not the strings */
files = malloc (sizeof (char *) * self->n_list_files);
memcpy (files, self->list_files, sizeof (char *) * self->n_list_files);
return sysprof_steal_pointer (&files);
}