#include <babeltrace/format.h>
#include <babeltrace/ctf/types.h>
#include <babeltrace/ctf/metadata.h>
+#include <babeltrace/babeltrace.h>
+#include <inttypes.h>
+#include <uuid/uuid.h>
+#include <sys/mman.h>
#include <errno.h>
-#include <sys/stat.h>
#include <sys/types.h>
-#include <dirent.h>
+#include <sys/stat.h>
#include <fcntl.h>
+#include <dirent.h>
#include <glib.h>
+#include <unistd.h>
+#include <stdlib.h>
-struct trace_descriptor {
- struct ctf_trace ctf_trace;
-};
+#include "metadata/ctf-scanner.h"
+#include "metadata/ctf-parser.h"
+#include "metadata/ctf-ast.h"
+
+/*
+ * We currently simply map a page to read the packet header and packet
+ * context to get the packet length and content length. (in bits)
+ */
+#define MAX_PACKET_HEADER_LEN (getpagesize() * CHAR_BIT)
+#define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT)
+#define UUID_LEN 16 /* uuid by value len */
+
+extern int yydebug;
struct trace_descriptor *ctf_open_trace(const char *path, int flags);
void ctf_close_trace(struct trace_descriptor *descriptor);
-static struct format ctf_format = {
- .uint_read = ctf_uint_read,
- .int_read = ctf_int_read,
- .uint_write = ctf_uint_write,
- .int_write = ctf_int_write,
- .double_read = ctf_double_read,
- .double_write = ctf_double_write,
- .float_copy = ctf_float_copy,
- .string_copy = ctf_string_copy,
- .string_read = ctf_string_read,
- .string_write = ctf_string_write,
- .string_free_temp = ctf_string_free_temp,
- .enum_read = ctf_enum_read,
- .enum_write = ctf_enum_write,
- .struct_begin = ctf_struct_begin,
- .struct_end = ctf_struct_end,
- .variant_begin = ctf_variant_begin,
- .variant_end = ctf_variant_end,
- .array_begin = ctf_array_begin,
- .array_end = ctf_array_end,
- .sequence_begin = ctf_sequence_begin,
- .sequence_end = ctf_sequence_end,
+static
+rw_dispatch read_dispatch_table[] = {
+ [ CTF_TYPE_INTEGER ] = ctf_integer_read,
+ [ CTF_TYPE_FLOAT ] = ctf_float_read,
+ [ CTF_TYPE_ENUM ] = ctf_enum_read,
+ [ CTF_TYPE_STRING ] = ctf_string_read,
+ [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
+ [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
+ [ CTF_TYPE_ARRAY ] = ctf_array_rw,
+ [ CTF_TYPE_SEQUENCE ] = ctf_sequence_rw,
+};
+
+static
+rw_dispatch write_dispatch_table[] = {
+ [ CTF_TYPE_INTEGER ] = ctf_integer_write,
+ [ CTF_TYPE_FLOAT ] = ctf_float_write,
+ [ CTF_TYPE_ENUM ] = ctf_enum_write,
+ [ CTF_TYPE_STRING ] = ctf_string_write,
+ [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
+ [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
+ [ CTF_TYPE_ARRAY ] = ctf_array_rw,
+ [ CTF_TYPE_SEQUENCE ] = ctf_sequence_rw,
+};
+
+static
+struct format ctf_format = {
.open_trace = ctf_open_trace,
.close_trace = ctf_close_trace,
};
+void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags)
+{
+ pos->fd = fd;
+ pos->mmap_offset = 0;
+ pos->packet_size = 0;
+ pos->content_size = 0;
+ pos->content_size_loc = NULL;
+ pos->base = NULL;
+ pos->offset = 0;
+ pos->dummy = false;
+ pos->cur_index = 0;
+ if (fd >= 0)
+ pos->packet_index = g_array_new(FALSE, TRUE,
+ sizeof(struct packet_index));
+ else
+ pos->packet_index = NULL;
+ switch (open_flags & O_ACCMODE) {
+ case O_RDONLY:
+ pos->prot = PROT_READ;
+ pos->flags = MAP_PRIVATE;
+ pos->parent.rw_table = read_dispatch_table;
+ break;
+ case O_WRONLY:
+ case O_RDWR:
+ pos->prot = PROT_WRITE; /* Write has priority */
+ pos->flags = MAP_SHARED;
+ pos->parent.rw_table = write_dispatch_table;
+ if (fd >= 0)
+ ctf_move_pos_slow(pos, 0); /* position for write */
+ break;
+ default:
+ assert(0);
+ }
+}
+
+void ctf_fini_pos(struct ctf_stream_pos *pos)
+{
+ int ret;
+
+ if (pos->prot == PROT_WRITE && pos->content_size_loc)
+ *pos->content_size_loc = pos->offset;
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
+ if (ret) {
+ fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ assert(0);
+ }
+ }
+ (void) g_array_free(pos->packet_index, TRUE);
+}
+
+void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset)
+{
+ int ret;
+ off_t off;
+ struct packet_index *index;
+
+
+ if (pos->prot == PROT_WRITE && pos->content_size_loc)
+ *pos->content_size_loc = pos->offset;
+
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
+ if (ret) {
+ fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ assert(0);
+ }
+ }
+
+ /*
+ * The caller should never ask for ctf_move_pos across packets,
+ * except to get exactly at the beginning of the next packet.
+ */
+ if (pos->prot == PROT_WRITE) {
+ /* The writer will add padding */
+ assert(pos->offset + offset == pos->packet_size);
+
+ /*
+ * Don't increment for initial stream move (only condition where
+ * pos->offset can be 0.
+ */
+ if (pos->offset)
+ pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT;
+ pos->content_size = -1U; /* Unknown at this point */
+ pos->packet_size = WRITE_PACKET_LEN;
+ off = posix_fallocate(pos->fd, pos->mmap_offset, pos->packet_size / CHAR_BIT);
+ assert(off >= 0);
+ } else {
+ /* The reader will expect us to skip padding */
+ assert(pos->offset + offset == pos->content_size);
+
+ /*
+ * Don't increment for initial stream move (only condition where
+ * pos->offset can be 0).
+ */
+ if (pos->offset)
+ ++pos->cur_index;
+ index = &g_array_index(pos->packet_index, struct packet_index,
+ pos->cur_index);
+ pos->mmap_offset = index->offset;
+
+ /* Lookup context/packet size in index */
+ pos->content_size = index->content_size;
+ pos->packet_size = index->packet_size;
+ }
+ /* map new base. Need mapping length from header. */
+ pos->base = mmap(NULL, pos->packet_size / CHAR_BIT, pos->prot,
+ pos->flags, pos->fd, pos->mmap_offset);
+ pos->offset = 0;
+}
+
+/*
+ * TODO: for now, we treat the metadata file as a simple text file
+ * (without any header nor packets nor padding).
+ */
+static
+int ctf_open_trace_metadata_read(struct ctf_trace *td)
+{
+ struct ctf_scanner *scanner;
+ FILE *fp;
+ int ret = 0;
+
+ td->metadata.pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
+ if (td->metadata.pos.fd < 0) {
+ fprintf(stdout, "Unable to open metadata.\n");
+ return td->metadata.pos.fd;
+ }
+
+ if (babeltrace_debug)
+ yydebug = 1;
+
+ fp = fdopen(td->metadata.pos.fd, "r");
+ if (!fp) {
+ fprintf(stdout, "[error] Unable to open metadata stream.\n");
+ ret = -errno;
+ goto end_stream;
+ }
+
+ scanner = ctf_scanner_alloc(fp);
+ if (!scanner) {
+ fprintf(stdout, "[error] Error allocating scanner\n");
+ ret = -ENOMEM;
+ goto end_scanner_alloc;
+ }
+ ret = ctf_scanner_append_ast(scanner);
+ if (ret) {
+ fprintf(stdout, "[error] Error creating AST\n");
+ goto end;
+ }
+
+ if (babeltrace_debug) {
+ ret = ctf_visitor_print_xml(stdout, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stdout, "[error] Error visiting AST for XML output\n");
+ goto end;
+ }
+ }
+
+ ret = ctf_visitor_semantic_check(stdout, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stdout, "[error] Error in CTF semantic validation %d\n", ret);
+ goto end;
+ }
+ ret = ctf_visitor_construct_metadata(stdout, 0, &scanner->ast->root,
+ td, BYTE_ORDER);
+ if (ret) {
+ fprintf(stdout, "[error] Error in CTF metadata constructor %d\n", ret);
+ goto end;
+ }
+end:
+ ctf_scanner_free(scanner);
+end_scanner_alloc:
+ fclose(fp);
+end_stream:
+ close(td->metadata.pos.fd);
+ return ret;
+}
+
+
static
-int ctf_open_trace_read(struct trace_descriptor *td, const char *path, int flags)
+int create_stream_packet_index(struct ctf_trace *td,
+ struct ctf_file_stream *file_stream)
{
+ struct ctf_stream *stream;
+ int len_index;
+ struct ctf_stream_pos *pos;
+ struct stat filestats;
+ struct packet_index packet_index;
+ int first_packet = 1;
int ret;
- td->ctf_trace.flags = flags;
+ pos = &file_stream->pos;
+
+ ret = fstat(pos->fd, &filestats);
+ if (ret < 0)
+ return ret;
+
+ for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
+ uint64_t stream_id = 0;
+
+ if (pos->base) {
+ /* unmap old base */
+ ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
+ if (ret) {
+ fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
+ strerror(errno));
+ return ret;
+ }
+ pos->base = NULL;
+ }
+ /* map new base. Need mapping length from header. */
+ pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
+ MAP_PRIVATE, pos->fd, pos->mmap_offset);
+ pos->content_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
+ pos->packet_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
+ pos->offset = 0; /* Position of the packet header */
+
+ packet_index.offset = pos->mmap_offset;
+ packet_index.content_size = 0;
+ packet_index.packet_size = 0;
+
+ /* read and check header, set stream id (and check) */
+ if (td->packet_header) {
+ /* Read packet header */
+ generic_rw(&pos->parent, &td->packet_header->p);
+
+ len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("magic"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(td->packet_header, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ if (defint->value._unsigned != CTF_MAGIC) {
+ fprintf(stdout, "[error] Invalid magic number %" PRIX64 " at packet %u (file offset %zd).\n",
+ defint->value._unsigned,
+ file_stream->pos.packet_index->len,
+ (ssize_t) pos->mmap_offset);
+ return -EINVAL;
+ }
+ }
+
+ /* check uuid */
+ len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("trace_uuid"));
+ if (len_index >= 0) {
+ struct definition_array *defarray;
+ struct field *field;
+ uint64_t i;
+ uint8_t uuidval[UUID_LEN];
+
+ field = struct_definition_get_field_from_index(td->packet_header, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_ARRAY);
+ defarray = container_of(field->definition, struct definition_array, p);
+ assert(array_len(defarray) == UUID_LEN);
+ assert(defarray->declaration->elem->id == CTF_TYPE_INTEGER);
+
+ for (i = 0; i < UUID_LEN; i++) {
+ struct definition *elem;
+ struct definition_integer *defint;
+
+ elem = array_index(defarray, i);
+ assert(elem);
+ defint = container_of(elem, struct definition_integer, p);
+ uuidval[i] = defint->value._unsigned;
+ }
+ ret = uuid_compare(td->uuid, uuidval);
+ if (ret) {
+ fprintf(stdout, "[error] Unique Universal Identifiers do not match.\n");
+ return -EINVAL;
+ }
+ }
+
+
+ len_index = struct_declaration_lookup_field_index(td->packet_header->declaration, g_quark_from_static_string("stream_id"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(td->packet_header, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ stream_id = defint->value._unsigned;
+ }
+ }
+
+ if (!first_packet && file_stream->stream_id != stream_id) {
+ fprintf(stdout, "[error] Stream ID is changing within a stream.\n");
+ return -EINVAL;
+ }
+ if (first_packet) {
+ file_stream->stream_id = stream_id;
+ if (stream_id >= td->streams->len) {
+ fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ stream = g_ptr_array_index(td->streams, stream_id);
+ if (!stream) {
+ fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
+ return -EINVAL;
+ }
+ file_stream->stream = stream;
+ }
+ first_packet = 0;
+
+ if (stream->packet_context) {
+ /* Read packet context */
+ generic_rw(&pos->parent, &stream->packet_context->p);
+
+ /* read content size from header */
+ len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("content_size"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(stream->packet_context, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ packet_index.content_size = defint->value._unsigned;
+ } else {
+ /* Use file size for packet size */
+ packet_index.content_size = filestats.st_size * CHAR_BIT;
+ }
+
+ /* read packet size from header */
+ len_index = struct_declaration_lookup_field_index(stream->packet_context->declaration, g_quark_from_static_string("packet_size"));
+ if (len_index >= 0) {
+ struct definition_integer *defint;
+ struct field *field;
+
+ field = struct_definition_get_field_from_index(stream->packet_context, len_index);
+ assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
+ defint = container_of(field->definition, struct definition_integer, p);
+ assert(defint->declaration->signedness == FALSE);
+ packet_index.packet_size = defint->value._unsigned;
+ } else {
+ /* Use content size if non-zero, else file size */
+ packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
+ }
+ } else {
+ /* Use file size for packet size */
+ packet_index.content_size = filestats.st_size * CHAR_BIT;
+ /* Use content size if non-zero, else file size */
+ packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
+ }
+
+ /* add index to packet array */
+ g_array_append_val(file_stream->pos.packet_index, packet_index);
+
+ pos->mmap_offset += packet_index.packet_size / CHAR_BIT;
+ }
+
+ return 0;
+}
+
+/*
+ * Note: many file streams can inherit from the same stream class
+ * description (metadata).
+ */
+static
+int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags)
+{
+ int ret;
+ struct ctf_file_stream *file_stream;
+
+ ret = openat(td->dirfd, path, flags);
+ if (ret < 0)
+ goto error;
+ file_stream = g_new0(struct ctf_file_stream, 1);
+ ctf_init_pos(&file_stream->pos, ret, flags);
+ ret = create_stream_packet_index(td, file_stream);
+ if (ret)
+ goto error_index;
+ /* Add stream file to stream class */
+ g_ptr_array_add(file_stream->stream->files, file_stream);
+ return 0;
+
+error_index:
+ ctf_fini_pos(&file_stream->pos);
+ close(file_stream->pos.fd);
+ g_free(file_stream);
+error:
+ return ret;
+}
+
+static
+int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
+{
+ int ret;
+ struct dirent *dirent;
+ struct dirent *diriter;
+ size_t dirent_len;
+
+ td->flags = flags;
/* Open trace directory */
- td->ctf_trace.dir = opendir(path);
- if (!td->ctf_trace.dir) {
- fprintf(stdout, "Unable to open trace directory.\n");
+ td->dir = opendir(path);
+ if (!td->dir) {
+ fprintf(stdout, "[error] Unable to open trace directory.\n");
ret = -ENOENT;
goto error;
}
+ td->dirfd = open(path, 0);
+ if (td->dirfd < 0) {
+ fprintf(stdout, "[error] Unable to open trace directory file descriptor.\n");
+ ret = -ENOENT;
+ goto error_dirfd;
+ }
+ td->streams = g_ptr_array_new();
/*
- * Open each stream: for each file, try to open, check magic
- * number, and get the stream ID to add to the right location in
- * the stream array.
- *
* Keep the metadata file separate.
*/
-
+ ret = ctf_open_trace_metadata_read(td);
+ if (ret) {
+ goto error_metadata;
+ }
/*
- * Use the metadata file to populate the trace metadata.
+ * Open each stream: for each file, try to open, check magic
+ * number, and get the stream ID to add to the right location in
+ * the stream array.
*/
+ dirent_len = offsetof(struct dirent, d_name) +
+ fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
+
+ dirent = malloc(dirent_len);
+
+ for (;;) {
+ ret = readdir_r(td->dir, dirent, &diriter);
+ if (ret) {
+ fprintf(stdout, "[error] Readdir error.\n");
+ goto readdir_error;
+ }
+ if (!diriter)
+ break;
+ if (!strcmp(diriter->d_name, ".")
+ || !strcmp(diriter->d_name, "..")
+ || !strcmp(diriter->d_name, "metadata"))
+ continue;
+ ret = ctf_open_file_stream_read(td, diriter->d_name, flags);
+ if (ret) {
+ fprintf(stdout, "[error] Open file stream error.\n");
+ goto readdir_error;
+ }
+ }
+ free(dirent);
return 0;
+
+readdir_error:
+ free(dirent);
+error_metadata:
+ g_ptr_array_free(td->streams, TRUE);
+ close(td->dirfd);
+error_dirfd:
+ closedir(td->dir);
error:
return ret;
}
static
-int ctf_open_trace_write(struct trace_descriptor *td, const char *path, int flags)
+int ctf_open_trace_write(struct ctf_trace *td, const char *path, int flags)
{
int ret;
if (ret)
return ret;
+ /* Open trace directory */
+ td->dir = opendir(path);
+ if (!td->dir) {
+ fprintf(stdout, "[error] Unable to open trace directory.\n");
+ ret = -ENOENT;
+ goto error;
+ }
+
+
return 0;
+
+error:
+ return ret;
}
struct trace_descriptor *ctf_open_trace(const char *path, int flags)
{
- struct trace_descriptor *td;
+ struct ctf_trace *td;
int ret;
- td = g_new(struct trace_descriptor, 1);
+ td = g_new0(struct ctf_trace, 1);
- switch (flags) {
+ switch (flags & O_ACCMODE) {
case O_RDONLY:
ret = ctf_open_trace_read(td, path, flags);
if (ret)
goto error;
break;
case O_WRONLY:
+ fprintf(stdout, "[error] Opening CTF traces for output is not supported yet.\n");
+ goto error;
+#if 0
ret = ctf_open_trace_write(td, path, flags);
if (ret)
goto error;
+#endif //0
break;
default:
- fprintf(stdout, "Incorrect open flags.\n");
+ fprintf(stdout, "[error] Incorrect open flags.\n");
goto error;
}
- return td;
+ return &td->parent;
error:
g_free(td);
return NULL;
}
-void ctf_close_trace(struct trace_descriptor *td)
+static
+void ctf_close_file_stream(struct ctf_file_stream *file_stream)
+{
+ ctf_fini_pos(&file_stream->pos);
+ close(file_stream->pos.fd);
+}
+
+void ctf_close_trace(struct trace_descriptor *tdp)
{
- closedir(td->ctf_trace.dir);
+ struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
+ int i;
+
+ if (td->streams) {
+ for (i = 0; i < td->streams->len; i++) {
+ struct ctf_stream *stream;
+ int j;
+ stream = g_ptr_array_index(td->streams, i);
+ for (j = 0; j < stream->files->len; j++) {
+ struct ctf_file_stream *file_stream;
+ file_stream = g_ptr_array_index(stream->files, j);
+ ctf_close_file_stream(file_stream);
+ }
+
+ }
+ g_ptr_array_free(td->streams, TRUE);
+ }
+ closedir(td->dir);
g_free(td);
}
projects / babeltrace.git / blobdiff