)
fi
+# Optional debuginfo feature (enabled by default)
+AC_ARG_ENABLE([debuginfo], [AC_HELP_STRING([--disable-debuginfo], [disable the debuginfo feature])], [], [enable_debuginfo=yes])
+
+AM_CONDITIONAL([ENABLE_DEBUGINFO], [test "x$enable_debuginfo" = xyes])
+AS_IF([test "x$enable_debuginfo" = xyes], [
+ AC_CHECK_LIB([elf], [elf_version], [], [])
+ AC_CHECK_LIB([dw], [dwarf_begin], [], [])
+ AS_IF([test "x$ac_cv_lib_elf_elf_version" = xno || test "x$ac_cv_lib_dw_dwarf_begin" = xno],
+ [AC_MSG_ERROR(Missing library from elfutils required for debuginfo. You can disable this feature with --disable-debuginfo.)]
+ )
+ AC_DEFINE([ENABLE_DEBUGINFO], [1], [Define to 1 if you enable the 'debuginfo' feature])
+], [])
+
pkg_modules="gmodule-2.0 >= 2.0.0"
PKG_CHECK_MODULES(GMODULE, [$pkg_modules])
AC_SUBST(PACKAGE_LIBS)
$(top_builddir)/formats/bt-dummy/libbabeltrace-dummy.la \
$(top_builddir)/formats/lttng-live/libbabeltrace-lttng-live.la
+if ENABLE_DEBUGINFO
+babeltrace_LDADD += $(top_builddir)/lib/libdebuginfo.la
+endif
+
babeltrace_log_SOURCES = babeltrace-log.c
babeltrace_log_LDADD = \
#include <babeltrace/ctf/events-internal.h>
#include <babeltrace/ctf/iterator.h>
#include <babeltrace/ctf-text/types.h>
+#include <babeltrace/debuginfo.h>
+
#include <babeltrace/iterator.h>
#include <popt.h>
#include <errno.h>
*/
static GPtrArray *opt_input_paths;
static char *opt_output_path;
-int opt_stream_intersection;
+static int opt_stream_intersection;
static struct bt_format *fmt_read;
OPT_CLOCK_GMT,
OPT_CLOCK_FORCE_CORRELATE,
OPT_STREAM_INTERSECTION,
+ OPT_DEBUG_DIR,
};
/*
{ "clock-gmt", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_GMT, NULL, NULL },
{ "clock-force-correlate", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_FORCE_CORRELATE, NULL, NULL },
{ "stream-intersection", 0, POPT_ARG_NONE, NULL, OPT_STREAM_INTERSECTION, NULL, NULL },
+#ifdef ENABLE_DEBUGINFO
+ { "debug-info-dir", 0, POPT_ARG_STRING, NULL, OPT_DEBUG_DIR, NULL, NULL },
+#endif
{ NULL, 0, 0, NULL, 0, NULL, NULL },
};
fprintf(fp, " --clock-force-correlate Assume that clocks are inherently correlated\n");
fprintf(fp, " across traces.\n");
fprintf(fp, " --stream-intersection Only print events when all streams are active.\n");
+#ifdef ENABLE_DEBUGINFO
+ fprintf(fp, " --debug-info-dir Directory in which to look for debugging information\n");
+ fprintf(fp, " files. (default: /usr/lib/debug/)\n");
+#endif
list_formats(fp);
fprintf(fp, "\n");
}
case OPT_STREAM_INTERSECTION:
opt_stream_intersection = 1;
break;
-
+ case OPT_DEBUG_DIR:
+ opt_debug_dir = (char *) poptGetOptArg(pc);
+ if (!opt_debug_dir) {
+ ret = -EINVAL;
+ goto end;
+ }
+ break;
default:
ret = -EINVAL;
goto end;
free(opt_input_format);
free(opt_output_format);
free(opt_output_path);
+ free(opt_debug_dir);
g_ptr_array_free(opt_input_paths, TRUE);
if (partial_error)
exit(EXIT_FAILURE);
libbabeltrace_ctf_text_la_LIBADD = \
$(top_builddir)/lib/libbabeltrace.la \
$(top_builddir)/formats/ctf/libbabeltrace-ctf.la
+
+if ENABLE_DEBUGINFO
+libbabeltrace_ctf_text_la_LIBADD += $(top_builddir)/lib/libdebuginfo.la
+endif
#include <babeltrace/ctf/metadata.h>
#include <babeltrace/babeltrace-internal.h>
#include <babeltrace/ctf/events-internal.h>
+#include <babeltrace/trace-debuginfo.h>
#include <inttypes.h>
#include <sys/mman.h>
#include <errno.h>
static
int ctf_text_write_event(struct bt_stream_pos *ppos, struct ctf_stream_definition *stream)
-
{
struct ctf_text_stream_pos *pos =
container_of(ppos, struct ctf_text_stream_pos, parent);
return -EINVAL;
}
+ handle_debug_info_event(stream_class, event);
+
if (stream->has_timestamp) {
set_field_names_print(pos, ITEM_HEADER);
if (pos->print_names)
#include <inttypes.h>
#include <stdint.h>
#include <babeltrace/bitfield.h>
+#include <babeltrace/trace-debuginfo.h>
int ctf_text_integer_write(struct bt_stream_pos *ppos, struct bt_definition *definition)
{
return -EINVAL;
}
+ ctf_text_integer_write_debug_info(ppos, definition);
+
return 0;
}
metadata/libctf-ast.la \
writer/libctf-writer.la \
ir/libctf-ir.la
+
+if ENABLE_DEBUGINFO
+libbabeltrace_ctf_la_LIBADD += $(top_builddir)/lib/libdebuginfo.la
+endif
#include <babeltrace/context-internal.h>
#include <babeltrace/compat/uuid.h>
#include <babeltrace/endian.h>
+#include <babeltrace/trace-debuginfo.h>
#include <babeltrace/ctf/ctf-index.h>
#include <inttypes.h>
#include <stdio.h>
int64_t opt_clock_offset_ns;
extern int yydebug;
+char *opt_debug_dir;
/*
* TODO: babeltrace_ctf_console_output ensures that we only print
goto error;
}
+ ret = trace_debug_info_create(td);
+ if (ret) {
+ goto error;
+ }
+
return &td->parent;
error:
+ trace_debug_info_destroy(td);
g_free(td);
return NULL;
}
if (ret)
goto error_free;
+ ret = trace_debug_info_create(td);
+ if (ret) {
+ goto error_free;
+ }
+
return &td->parent;
error_free:
}
}
free(td->metadata_string);
+ trace_debug_info_destroy(td);
g_free(td);
return 0;
}
babeltrace/ref-internal.h \
babeltrace/types.h \
babeltrace/object-internal.h \
+ babeltrace/crc32.h \
+ babeltrace/debuginfo.h \
+ babeltrace/trace-debuginfo.h \
+ babeltrace/dwarf.h \
+ babeltrace/so-info.h \
babeltrace/ctf-ir/metadata.h \
babeltrace/ctf/events-internal.h \
babeltrace/ctf/metadata.h \
opt_clock_seconds,
opt_clock_date,
opt_clock_gmt,
- opt_clock_force_correlate,
- opt_stream_intersection;
+ opt_clock_force_correlate;
extern int64_t opt_clock_offset;
extern int64_t opt_clock_offset_ns;
extern int babeltrace_ctf_console_output;
+extern char *opt_debug_dir;
#endif
--- /dev/null
+#ifndef _BABELTRACE_CRC32_H
+#define _BABELTRACE_CRC32_H
+
+/*
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <babeltrace/babeltrace-internal.h>
+
+/**
+ * Compute a 32-bit cyclic redundancy checksum for a given file.
+ *
+ * On success, the out parameter crc is set with the computed checksum
+ * value,
+ *
+ * @param fd File descriptor for the file for which to compute the CRC
+ * @param crc Out parameter, the computed checksum
+ * @returns 0 on success, -1 on failure.
+ */
+BT_HIDDEN
+int crc32(int fd, uint32_t *crc);
+
+#endif /* _BABELTRACE_CRC32_H */
char tracer_name[TRACER_ENV_LEN];
};
+#ifdef ENABLE_DEBUGINFO
+struct debug_info;
+#endif
+
struct ctf_trace {
struct bt_trace_descriptor parent;
DIR *dir;
int dirfd;
int flags; /* open flags */
+
+#ifdef ENABLE_DEBUGINFO
+ /* Debug information for this trace */
+ struct debug_info *debug_info;
+#endif
};
#define CTF_STREAM_SET_FIELD(ctf_stream, field) \
--- /dev/null
+#ifndef _BABELTRACE_DEBUGINFO_H
+#define _BABELTRACE_DEBUGINFO_H
+
+/*
+ * Babeltrace - Debug information state tracker
+ *
+ * Copyright (c) 2015 EfficiOS Inc.
+ * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com>
+ * Copyright (c) 2015 Antoine Busque <abusque@efficios.com>
+ * Copyright (c) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+struct debug_info;
+struct ctf_event_definition;
+
+#ifdef ENABLE_DEBUGINFO
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <babeltrace/babeltrace-internal.h>
+
+struct debug_info_source {
+ /* Strings are owned by debug_info_source. */
+ char *func;
+ uint64_t line_no;
+ char *filename;
+};
+
+BT_HIDDEN
+struct debug_info *debug_info_create(void);
+
+BT_HIDDEN
+void debug_info_destroy(struct debug_info *debug_info);
+
+BT_HIDDEN
+void debug_info_handle_event(struct debug_info *debug_info,
+ struct ctf_event_definition *event);
+
+#else /* ifdef ENABLE_DEBUGINFO */
+
+static inline
+struct debug_info *debug_info_create(void) { return malloc(1); }
+
+static inline
+void debug_info_destroy(struct debug_info *debug_info) { free(debug_info); }
+
+static inline
+void debug_info_handle_event(struct debug_info *debug_info,
+ struct ctf_event_definition *event) { }
+
+#endif /* ENABLE_DEBUGINFO */
+
+#endif /* _BABELTRACE_DEBUGINFO_H */
--- /dev/null
+#ifndef _BABELTRACE_DWARF_H
+#define _BABELTRACE_DWARF_H
+
+/*
+ * Babeltrace - DWARF Information Reader
+ *
+ * Copyright 2015 Antoine Busque <abusque@efficios.com>
+ *
+ * Author: Antoine Busque <abusque@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <dwarf.h>
+#include <elfutils/libdw.h>
+#include <babeltrace/babeltrace-internal.h>
+
+/*
+ * bt_dwarf is a wrapper over libdw providing a nicer, higher-level
+ * interface, to access basic debug information.
+ */
+
+/*
+ * This structure corresponds to a single compilation unit (CU) for a
+ * given set of debug information (Dwarf type).
+ */
+struct bt_dwarf_cu {
+ Dwarf *dwarf_info;
+ /* Offset in bytes in the DWARF file to current CU header. */
+ Dwarf_Off offset;
+ /* Offset in bytes in the DWARF file to next CU header. */
+ Dwarf_Off next_offset;
+ /* Size in bytes of CU header */
+ size_t header_size;
+};
+
+/*
+ * This structure represents a single debug information entry (DIE),
+ * within a compilation unit (CU).
+ */
+struct bt_dwarf_die {
+ struct bt_dwarf_cu *cu;
+ Dwarf_Die *dwarf_die;
+ /*
+ * A depth of 0 represents a root DIE, located in the DWARF
+ * layout on the same level as its corresponding CU entry. Its
+ * children DIEs will have a depth of 1, and so forth.
+ */
+ unsigned int depth;
+};
+
+/**
+ * Instantiate a structure to access compile units (CU) from a given
+ * `dwarf_info`.
+ *
+ * @param dwarf_info Dwarf instance
+ * @returns Pointer to the new bt_dwarf_cu on success,
+ * NULL on failure.
+ */
+BT_HIDDEN
+struct bt_dwarf_cu *bt_dwarf_cu_create(Dwarf *dwarf_info);
+
+/**
+ * Destroy the given bt_dwarf_cu instance.
+ *
+ * @param cu bt_dwarf_cu instance
+ */
+BT_HIDDEN
+void bt_dwarf_cu_destroy(struct bt_dwarf_cu *cu);
+
+/**
+ * Advance the compile unit `cu` to the next one.
+ *
+ * On success, `cu`'s offset is set to that of the current compile
+ * unit in the executable. On failure, `cu` remains unchanged.
+ *
+ * @param cu bt_dwarf_cu instance
+ * @returns 0 on success, 1 if no next CU is available,
+ * -1 on failure
+ */
+BT_HIDDEN
+int bt_dwarf_cu_next(struct bt_dwarf_cu *cu);
+
+/**
+ * Instantiate a structure to access debug information entries (DIE)
+ * for the given compile unit `cu`.
+ *
+ * @param cu bt_dwarf_cu instance
+ * @returns Pointer to the new bt_dwarf_die on success,
+ * NULL on failure.
+ */
+BT_HIDDEN
+struct bt_dwarf_die *bt_dwarf_die_create(struct bt_dwarf_cu *cu);
+
+/**
+ * Destroy the given bt_dwarf_die instance.
+ *
+ * @param die bt_dwarf_die instance
+ */
+BT_HIDDEN
+void bt_dwarf_die_destroy(struct bt_dwarf_die *die);
+
+/**
+ * Advance the debug information entry `die` to its first child, if
+ * any.
+ *
+ * @param die bt_dwarf_die instance
+ * @returns 0 on success, 1 if no child DIE is available,
+ * -1 on failure
+ */
+BT_HIDDEN
+int bt_dwarf_die_child(struct bt_dwarf_die *die);
+
+/**
+ * Advance the debug information entry `die` to the next one.
+ *
+ * The next DIE is considered to be its sibling on the same level. The
+ * only exception is when the depth of the given DIE is 0, i.e. a
+ * newly created bt_dwarf_die, in which case next returns the first
+ * DIE at depth 1.
+ *
+ * The reason for staying at a depth of 1 is that this is where all
+ * the function DIEs (those with a tag value of DW_TAG_subprogram) are
+ * located, from which more specific child DIEs can then be accessed
+ * if needed via bt_dwarf_die_child.
+ *
+ * @param die bt_dwarf_die instance
+ * @returns 0 on success, 1 if no other siblings are available, -1 on
+ * failure
+ */
+BT_HIDDEN
+int bt_dwarf_die_next(struct bt_dwarf_die *die);
+
+/**
+ * Get a DIE's tag.
+ *
+ * On success, the `tag` out parameter is set to the `die`'s tag's
+ * value. It remains unchanged on failure.
+ *
+ * @param die bt_dwarf_die instance
+ * @param tag Out parameter, the DIE's tag value
+ * @returns 0 on success, -1 on failure.
+ */
+BT_HIDDEN
+int bt_dwarf_die_get_tag(struct bt_dwarf_die *die, int *tag);
+
+/**
+ * Get a DIE's name.
+ *
+ * On success, the `name` out parameter is set to the DIE's name. It
+ * remains unchanged on failure.
+ *
+ * @param die bt_dwarf_die instance
+ * @param name Out parameter, the DIE's name
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int bt_dwarf_die_get_name(struct bt_dwarf_die *die, char **name);
+
+/**
+ * Get the full path to the DIE's callsite file.
+ *
+ * Only applies to DW_TAG_inlined_subroutine entries. The out
+ * parameter `filename` is set on success, unchanged on failure.
+ *
+ * @param die bt_dwarf_die instance
+ * @param filename Out parameter, the filename for the subroutine's
+ * callsite
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int bt_dwarf_die_get_call_file(struct bt_dwarf_die *die, char **filename);
+
+/**
+ * Get line number for the DIE's callsite.
+ *
+ * Only applies to DW_TAG_inlined_subroutine entries. The out
+ * parameter `line_no` is set on success, unchanged on failure.
+ *
+ * @param die bt_dwarf_die instance
+ * @param line_no Out parameter, the line number for the
+ * subroutine's callsite
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int bt_dwarf_die_get_call_line(struct bt_dwarf_die *die,
+ uint64_t *line_no);
+
+/**
+ * Verifies whether a given DIE contains the virtual memory address
+ * `addr`.
+ *
+ * On success, the out parameter `contains` is set with the boolean
+ * value indicating whether the DIE's range covers `addr`. On failure,
+ * it remains unchanged.
+ *
+ * @param die bt_dwarf_die instance
+ * @param addr The memory address to verify
+ * @param contains Out parameter, 1 if addr is contained,
+ * 0 if not
+ * @returns 0 on succes, -1 on failure
+ */
+BT_HIDDEN
+int bt_dwarf_die_contains_addr(struct bt_dwarf_die *die, uint64_t addr,
+ int *contains);
+
+#endif /* _BABELTRACE_DWARF_H */
--- /dev/null
+#ifndef _BABELTRACE_SO_INFO_H
+#define _BABELTRACE_SO_INFO_H
+
+/*
+ * Babeltrace - Executable and Shared Object Debug Info Reader
+ *
+ * Copyright 2015 Antoine Busque <abusque@efficios.com>
+ *
+ * Author: Antoine Busque <abusque@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <gelf.h>
+#include <elfutils/libdw.h>
+#include <babeltrace/babeltrace-internal.h>
+
+#define DEFAULT_DEBUG_DIR "/usr/lib/debug"
+#define DEBUG_SUBDIR ".debug/"
+#define BUILD_ID_SUBDIR ".build-id/"
+#define BUILD_ID_SUFFIX ".debug"
+
+struct so_info {
+ /* Base virtual memory address. */
+ uint64_t low_addr;
+ /* Upper bound of exec address space. */
+ uint64_t high_addr;
+ /* Size of exec address space. */
+ uint64_t memsz;
+ /* Paths to ELF and DWARF files. */
+ char *elf_path;
+ char *dwarf_path;
+ /* libelf and libdw objects representing the files. */
+ Elf *elf_file;
+ Dwarf *dwarf_info;
+ /* Optional build ID info. */
+ uint8_t *build_id;
+ size_t build_id_len;
+ /* Optional debug link info. */
+ char *dbg_link_filename;
+ uint32_t dbg_link_crc;
+ /* FDs to ELF and DWARF files. */
+ int elf_fd;
+ int dwarf_fd;
+ /* Denotes whether the executable is position independent code. */
+ bool is_pic:1;
+ /* Denotes whether the SO only has ELF symbols and no DWARF info. */
+ bool is_elf_only:1;
+};
+
+struct source_location {
+ uint64_t line_no;
+ char *filename;
+};
+
+/**
+ * Initializes the so_info framework. Call this before calling
+ * anything else.
+ *
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int so_info_init(void);
+
+/**
+ * Instantiate a structure representing an ELF executable, possibly
+ * with DWARF info, located at the given path.
+ *
+ * @param path Path to the ELF file
+ * @param low_addr Base address of the executable
+ * @param memsz In-memory size of the executable
+ * @returns Pointer to the new so_info on success,
+ * NULL on failure.
+ */
+BT_HIDDEN
+struct so_info *so_info_create(const char *path, uint64_t low_addr,
+ uint64_t memsz);
+
+/**
+ * Destroy the given so_info instance
+ *
+ * @param so so_info instance to destroy
+ */
+BT_HIDDEN
+void so_info_destroy(struct so_info *so);
+
+/**
+ * Sets the build ID information for a given so_info instance.
+ *
+ * @param so The so_info instance for which to set
+ * the build ID
+ * @param build_id Array of bytes containing the actual ID
+ * @param build_id_len Length in bytes of the build_id
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int so_info_set_build_id(struct so_info *so, uint8_t *build_id,
+ size_t build_id_len);
+
+/**
+ * Sets the debug link information for a given so_info instance.
+ *
+ * @param so The so_info instance for which to set
+ * the debug link
+ * @param filename Name of the separate debug info file
+ * @param crc Checksum for the debug info file
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int so_info_set_debug_link(struct so_info *so, char *filename, uint32_t crc);
+
+/**
+ * Returns whether or not the given SO info \p so contains the address
+ * \p addr.
+ *
+ * @param so so_info instance
+ * @param addr Address to lookup
+ * @returns 1 if \p so contains \p addr, 0 if it does not,
+ * -1 on failure
+ */
+static inline
+int so_info_has_address(struct so_info *so, uint64_t addr)
+{
+ if (!so) {
+ return -1;
+ }
+
+ return addr >= so->low_addr && addr < so->high_addr;
+}
+
+/**
+ * Get the name of the function containing a given address within an
+ * executable.
+ *
+ * If no DWARF info is available, the function falls back to ELF
+ * symbols and the "function name" is in fact the name of the closest
+ * symbol, followed by the offset between the symbol and the address.
+ *
+ * On success, if found, the out parameter `func_name` is set. The ownership
+ * of `func_name` is passed to the caller. On failure, `func_name` remains
+ * unchanged.
+ *
+ * @param so so_info instance for the executable containing
+ * the address
+ * @param addr Virtual memory address for which to find the
+ * function name
+ * @param func_name Out parameter, the function name.
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int so_info_lookup_function_name(struct so_info *so, uint64_t addr,
+ char **func_name);
+
+/**
+ * Get the source location (file name and line number) for a given
+ * address within an executable.
+ *
+ * If no DWARF info is available, the source location cannot be found
+ * and the function will return unsuccesfully.
+ *
+ * On success, if found, the out parameter `src_loc` is set. The ownership
+ * of `src_loc` is passed to the caller. On failure, `src_loc` remains
+ * unchanged.
+ *
+ * @param so so_info instance for the executable containing
+ * the address
+ * @param addr Virtual memory address for which to find the
+ * source location
+ * @param src_loc Out parameter, the source location
+ * @returns 0 on success, -1 on failure
+ */
+BT_HIDDEN
+int so_info_lookup_source_location(struct so_info *so, uint64_t addr,
+ struct source_location **src_loc);
+
+/**
+ * Destroy the given source_location instance
+ *
+ * @param src_loc source_location instance to destroy
+ */
+BT_HIDDEN
+void source_location_destroy(struct source_location *src_loc);
+
+#endif /* _BABELTRACE_SO_INFO_H */
--- /dev/null
+#ifndef _BABELTRACE_TRACE_DEBUGINFO_H
+#define _BABELTRACE_TRACE_DEBUGINFO_H
+
+/*
+ * Babeltrace - Debug information state tracker wrapper
+ *
+ * Copyright (c) 2015 EfficiOS Inc.
+ * Copyright (c) 2015 Antoine Busque <abusque@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <babeltrace/ctf-ir/metadata.h>
+
+#ifdef ENABLE_DEBUGINFO
+
+#include <babeltrace/debuginfo.h>
+#include <babeltrace/ctf-text/types.h>
+#include <stdbool.h>
+
+static inline
+void ctf_text_integer_write_debug_info(struct bt_stream_pos *ppos,
+ struct bt_definition *definition)
+{
+ struct definition_integer *integer_definition =
+ container_of(definition, struct definition_integer, p);
+ struct ctf_text_stream_pos *pos = ctf_text_pos(ppos);
+ struct debug_info_source *debug_info_src =
+ integer_definition->debug_info_src;
+
+ /* Print debug info if available */
+ if (debug_info_src) {
+ if (debug_info_src->func || debug_info_src->filename) {
+ bool add_comma = false;
+
+ fprintf(pos->fp, ", debug_info = { ");
+
+ if (debug_info_src->func) {
+ fprintf(pos->fp, "func = \"%s\"",
+ debug_info_src->func);
+ add_comma = true;
+ }
+
+ if (debug_info_src->filename) {
+ if (add_comma) {
+ fprintf(pos->fp, ", ");
+ }
+
+ fprintf(pos->fp, "source_loc = \"%s:%" PRIu64
+ "\"",
+ debug_info_src->filename,
+ debug_info_src->line_no);
+ }
+
+ fprintf(pos->fp, " }");
+ }
+ }
+}
+
+static inline
+int trace_debug_info_create(struct ctf_trace *trace)
+{
+ int ret = 0;
+
+ if (strcmp(trace->env.domain, "ust") != 0) {
+ goto end;
+ }
+
+ if (strcmp(trace->env.tracer_name, "lttng-ust") != 0) {
+ goto end;
+ }
+
+ trace->debug_info = debug_info_create();
+ if (!trace->debug_info) {
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+static inline
+void trace_debug_info_destroy(struct ctf_trace *trace)
+{
+ debug_info_destroy(trace->debug_info);
+}
+
+static inline
+void handle_debug_info_event(struct ctf_stream_declaration *stream_class,
+ struct ctf_event_definition *event)
+{
+ debug_info_handle_event(stream_class->trace->debug_info, event);
+}
+
+#else /* #ifdef ENABLE_DEBUGINFO */
+
+static inline
+void ctf_text_integer_write_debug_info(struct bt_stream_pos *ppos,
+ struct bt_definition *definition)
+{
+ /* Do nothing. */
+}
+
+static inline
+int trace_debug_info_create(struct ctf_trace *trace)
+{
+ return 0;
+}
+
+static inline
+void trace_debug_info_destroy(struct ctf_trace *trace)
+{
+ /* Do nothing. */
+}
+
+static inline
+void handle_debug_info_event(struct ctf_stream_declaration *stream_class,
+ struct ctf_event_definition *event)
+{
+ /* Do nothing. */
+}
+
+#endif /* #else #ifdef ENABLE_DEBUGINFO */
+
+#endif /* _BABELTRACE_TRACE_DEBUGINFO_H */
struct ctf_clock *clock;
};
+#ifdef ENABLE_DEBUGINFO
+struct debug_info_source;
+#endif
+
struct definition_integer {
struct bt_definition p;
struct declaration_integer *declaration;
uint64_t _unsigned;
int64_t _signed;
} value;
+
+#ifdef ENABLE_DEBUGINFO
+ /*
+ * Debug infos (NULL if not set).
+ *
+ * This is extended debug informations set by the CTF input plugin
+ * itself when available. If it's set, then this integer definition
+ * is the "_ip" field of the stream event context.
+ */
+ struct debug_info_source *debug_info_src;
+#endif
};
struct declaration_float {
*/
struct bt_definition *bt_lookup_definition(const struct bt_definition *definition,
const char *field_name);
+struct bt_definition *bt_lookup_definition_by_quark(const struct bt_definition *definition,
+ GQuark quark);
struct definition_integer *bt_lookup_integer(const struct bt_definition *definition,
const char *field_name,
int signedness);
libbabeltrace_la_LDFLAGS = -version-info $(BABELTRACE_LIBRARY_VERSION)
+if ENABLE_DEBUGINFO
+noinst_LTLIBRARIES = libdebuginfo.la
+
+libdebuginfo_la_SOURCES = debuginfo.c \
+ so-info.c \
+ dwarf.c \
+ crc32.c
+libdebuginfo_la_LDFLAGS = -lelf -ldw
+endif
+
libbabeltrace_la_LIBADD = \
prio_heap/libprio_heap.la \
$(top_builddir)/types/libbabeltrace_types.la \
--- /dev/null
+/*
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <babeltrace/crc32.h>
+
+#define CRC(crc, ch) (crc = (crc >> 8) ^ crctab[(crc ^ (ch)) & 0xff])
+
+/* generated using the AUTODIN II polynomial
+ * x^32 + x^26 + x^23 + x^22 + x^16 +
+ * x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + 1
+ */
+static const uint32_t crctab[256] = {
+ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
+ 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+ 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+ 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+ 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+ 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+ 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
+ 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+ 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+ 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+ 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
+ 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+ 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
+ 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+ 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+ 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+ 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
+ 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+ 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
+ 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+ 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+ 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+ 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
+ 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+ 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+ 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+ 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+ 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+ 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
+ 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+ 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
+ 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+ 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+ 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+ 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+ 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+ 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
+ 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+ 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+ 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+ 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
+ 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+ 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
+ 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+ 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+ 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+ 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
+ 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+ 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
+ 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+ 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+ 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+ 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
+ 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+ 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+ 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+ 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+ 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+ 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
+ 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+ 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
+ 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+ 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+ 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
+};
+
+int crc32(int fd, uint32_t *crc)
+{
+ int nr;
+ uint32_t _crc = ~0;
+ char buf[BUFSIZ], *p;
+
+ if (fd < 0 || !crc) {
+ goto error;
+ }
+
+ while ((nr = read(fd, buf, sizeof(buf))) > 0) {
+ for (p = buf; nr--; ++p) {
+ CRC(_crc, *p);
+ }
+ }
+
+ if (nr < 0) {
+ goto error;
+ }
+
+ *crc = ~_crc;
+ return 0;
+
+error:
+ return -1;
+}
--- /dev/null
+/*
+ * Babeltrace - Debug Information State Tracker
+ *
+ * Copyright (c) 2015 EfficiOS Inc. and Linux Foundation
+ * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com>
+ * Copyright (c) 2015 Antoine Busque <abusque@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <assert.h>
+#include <glib.h>
+#include <babeltrace/types.h>
+#include <babeltrace/ctf-ir/metadata.h>
+#include <babeltrace/debuginfo.h>
+#include <babeltrace/so-info.h>
+
+struct proc_debug_info_sources {
+ /*
+ * Hash table: base address to so info; owned by
+ * proc_debug_info_sources.
+ */
+ GHashTable *baddr_to_so_info;
+
+ /*
+ * Hash table: IP to (struct debug_info_source *); owned by
+ * proc_debug_info_sources.
+ */
+ GHashTable *ip_to_debug_info_src;
+};
+
+struct debug_info {
+ /*
+ * Hash table of VPIDs (int64_t) to (struct ctf_proc_debug_infos*);
+ * owned by debug_info.
+ */
+ GHashTable *vpid_to_proc_dbg_info_src;
+ GQuark q_statedump_soinfo;
+ GQuark q_statedump_debug_link;
+ GQuark q_statedump_build_id;
+ GQuark q_statedump_start;
+ GQuark q_dl_open;
+};
+
+static
+int debug_info_init(struct debug_info *info)
+{
+ info->q_statedump_soinfo = g_quark_from_string(
+ "lttng_ust_statedump:soinfo");
+ info->q_statedump_debug_link = g_quark_from_string(
+ "lttng_ust_statedump:debug_link)");
+ info->q_statedump_build_id = g_quark_from_string(
+ "lttng_ust_statedump:build_id");
+ info->q_statedump_start = g_quark_from_string(
+ "lttng_ust_statedump:start");
+ info->q_dl_open = g_quark_from_string("lttng_ust_dl:dlopen");
+
+ return so_info_init();
+}
+
+static
+void debug_info_source_destroy(struct debug_info_source *debug_info_src)
+{
+ if (!debug_info_src) {
+ return;
+ }
+
+ free(debug_info_src->func);
+ free(debug_info_src->filename);
+ g_free(debug_info_src);
+}
+
+static
+struct debug_info_source *debug_info_source_create_from_so(struct so_info *so,
+ uint64_t ip)
+{
+ int ret;
+ struct debug_info_source *debug_info_src = NULL;
+ struct source_location *src_loc = NULL;
+
+ debug_info_src = g_new0(struct debug_info_source, 1);
+
+ if (!debug_info_src) {
+ goto end;
+ }
+
+ /* Lookup function name */
+ ret = so_info_lookup_function_name(so, ip, &debug_info_src->func);
+ if (ret) {
+ goto error;
+ }
+
+ /* Can't retrieve src_loc from ELF only, skip it */
+ if (so->is_elf_only) {
+ goto end;
+ }
+
+ /* Lookup source location */
+ ret = so_info_lookup_source_location(so, ip, &src_loc);
+ if (ret) {
+ goto error;
+ }
+
+ if (src_loc) {
+ debug_info_src->line_no = src_loc->line_no;
+
+ if (src_loc->filename) {
+ debug_info_src->filename = strdup(src_loc->filename);
+
+ if (!debug_info_src->filename) {
+ goto error;
+ }
+ }
+
+ source_location_destroy(src_loc);
+ }
+
+end:
+ return debug_info_src;
+
+error:
+ debug_info_source_destroy(debug_info_src);
+ return NULL;
+}
+
+static
+void proc_debug_info_sources_destroy(
+ struct proc_debug_info_sources *proc_dbg_info_src)
+{
+ if (!proc_dbg_info_src) {
+ return;
+ }
+
+ if (proc_dbg_info_src->baddr_to_so_info) {
+ g_hash_table_destroy(proc_dbg_info_src->baddr_to_so_info);
+ }
+
+ if (proc_dbg_info_src->ip_to_debug_info_src) {
+ g_hash_table_destroy(proc_dbg_info_src->ip_to_debug_info_src);
+ }
+
+ g_free(proc_dbg_info_src);
+}
+
+static
+struct proc_debug_info_sources *proc_debug_info_sources_create(void)
+{
+ struct proc_debug_info_sources *proc_dbg_info_src = NULL;
+
+ proc_dbg_info_src = g_new0(struct proc_debug_info_sources, 1);
+ if (!proc_dbg_info_src) {
+ goto end;
+ }
+
+ proc_dbg_info_src->baddr_to_so_info = g_hash_table_new_full(
+ NULL, NULL, NULL, (GDestroyNotify) so_info_destroy);
+ if (!proc_dbg_info_src->baddr_to_so_info) {
+ goto error;
+ }
+
+ proc_dbg_info_src->ip_to_debug_info_src = g_hash_table_new_full(
+ NULL, NULL, NULL,
+ (GDestroyNotify) debug_info_source_destroy);
+ if (!proc_dbg_info_src->ip_to_debug_info_src) {
+ goto error;
+ }
+
+end:
+ return proc_dbg_info_src;
+
+error:
+ proc_debug_info_sources_destroy(proc_dbg_info_src);
+ return NULL;
+}
+
+static
+struct proc_debug_info_sources *proc_debug_info_sources_ht_get_entry(
+ GHashTable *ht, int64_t vpid)
+{
+ gpointer key = (gpointer) vpid;
+ struct proc_debug_info_sources *proc_dbg_info_src = NULL;
+
+ /* Exists? Return it */
+ proc_dbg_info_src = g_hash_table_lookup(ht, key);
+ if (proc_dbg_info_src) {
+ goto end;
+ }
+
+ /* Otherwise, create and return it */
+ proc_dbg_info_src = proc_debug_info_sources_create();
+ if (!proc_dbg_info_src) {
+ goto end;
+ }
+
+ g_hash_table_insert(ht, key, proc_dbg_info_src);
+end:
+ return proc_dbg_info_src;
+}
+
+static
+struct debug_info_source *proc_debug_info_sources_get_entry(
+ struct proc_debug_info_sources *proc_dbg_info_src, uint64_t ip)
+{
+ struct debug_info_source *debug_info_src = NULL;
+ gint64 key = (gint64) ip;
+ GHashTableIter iter;
+ gpointer baddr, value;
+
+ /* Look in IP to debug infos hash table first. */
+ debug_info_src = g_hash_table_lookup(
+ proc_dbg_info_src->ip_to_debug_info_src,
+ (gpointer) key);
+ if (debug_info_src) {
+ goto end;
+ }
+
+ /* Check in all so_infos. */
+ g_hash_table_iter_init(&iter, proc_dbg_info_src->baddr_to_so_info);
+
+ while (g_hash_table_iter_next(&iter, &baddr, &value))
+ {
+ struct so_info *so = value;
+
+ if (!so_info_has_address(value, ip)) {
+ continue;
+ }
+
+ /* Found; add it to cache. */
+ debug_info_src = debug_info_source_create_from_so(so, ip);
+ if (debug_info_src) {
+ g_hash_table_insert(
+ proc_dbg_info_src->ip_to_debug_info_src,
+ (gpointer) key, debug_info_src);
+ }
+ break;
+ }
+
+end:
+ return debug_info_src;
+}
+
+BT_HIDDEN
+struct debug_info_source *debug_info_query(struct debug_info *debug_info,
+ int64_t vpid, uint64_t ip)
+{
+ struct debug_info_source *dbg_info_src = NULL;
+ struct proc_debug_info_sources *proc_dbg_info_src;
+
+ proc_dbg_info_src = proc_debug_info_sources_ht_get_entry(
+ debug_info->vpid_to_proc_dbg_info_src, vpid);
+ if (!proc_dbg_info_src) {
+ goto end;
+ }
+
+ dbg_info_src = proc_debug_info_sources_get_entry(
+ proc_dbg_info_src, ip);
+ if (!dbg_info_src) {
+ goto end;
+ }
+
+end:
+ return dbg_info_src;
+}
+
+BT_HIDDEN
+struct debug_info *debug_info_create(void)
+{
+ int ret;
+ struct debug_info *debug_info;
+
+ debug_info = g_new0(struct debug_info, 1);
+ if (!debug_info) {
+ goto end;
+ }
+
+ debug_info->vpid_to_proc_dbg_info_src = g_hash_table_new_full(NULL,
+ NULL, NULL,
+ (GDestroyNotify) proc_debug_info_sources_destroy);
+ if (!debug_info->vpid_to_proc_dbg_info_src) {
+ goto error;
+ }
+
+ ret = debug_info_init(debug_info);
+ if (ret) {
+ goto error;
+ }
+
+end:
+ return debug_info;
+error:
+ g_free(debug_info);
+ return NULL;
+}
+
+BT_HIDDEN
+void debug_info_destroy(struct debug_info *debug_info)
+{
+ if (!debug_info) {
+ goto end;
+ }
+
+ if (debug_info->vpid_to_proc_dbg_info_src) {
+ g_hash_table_destroy(debug_info->vpid_to_proc_dbg_info_src);
+ }
+
+ g_free(debug_info);
+end:
+ return;
+}
+
+static
+void handle_statedump_build_id_event(struct debug_info *debug_info,
+ struct ctf_event_definition *event_def)
+{
+ struct proc_debug_info_sources *proc_dbg_info_src;
+ struct bt_definition *event_fields_def = NULL;
+ struct bt_definition *sec_def = NULL;
+ struct bt_definition *baddr_def = NULL;
+ struct bt_definition *vpid_def = NULL;
+ struct bt_definition *build_id_def = NULL;
+ struct definition_sequence *build_id_seq;
+ struct so_info *so = NULL;
+ int i;
+ int64_t vpid;
+ uint64_t baddr;
+ uint8_t *build_id = NULL;
+ uint64_t build_id_len;
+
+ event_fields_def = (struct bt_definition *) event_def->event_fields;
+ sec_def = (struct bt_definition *)
+ event_def->stream->stream_event_context;
+
+ if (!event_fields_def || !sec_def) {
+ goto end;
+ }
+
+ baddr_def = bt_lookup_definition(event_fields_def, "_baddr");
+ if (!baddr_def) {
+ goto end;
+ }
+
+ vpid_def = bt_lookup_definition(sec_def, "_vpid");
+ if (!vpid_def) {
+ goto end;
+ }
+
+ build_id_def = bt_lookup_definition(event_fields_def, "_build_id");
+ if (!build_id_def) {
+ goto end;
+ }
+
+ if (baddr_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ if (vpid_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ if (build_id_def->declaration->id != BT_CTF_TYPE_ID_SEQUENCE) {
+ goto end;
+ }
+
+ baddr = bt_get_unsigned_int(baddr_def);
+ vpid = bt_get_signed_int(vpid_def);
+ build_id_seq = container_of(build_id_def,
+ struct definition_sequence, p);
+ build_id_len = build_id_seq->length->value._unsigned;
+
+ build_id = g_malloc(build_id_len);
+ if (!build_id) {
+ goto end;
+ }
+
+ for (i = 0; i < build_id_len; ++i) {
+ struct bt_definition **field;
+
+ field = (struct bt_definition **) &g_ptr_array_index(
+ build_id_seq->elems, i);
+ build_id[i] = bt_get_unsigned_int(*field);
+ }
+
+ proc_dbg_info_src = proc_debug_info_sources_ht_get_entry(
+ debug_info->vpid_to_proc_dbg_info_src, vpid);
+ if (!proc_dbg_info_src) {
+ goto end;
+ }
+
+ so = g_hash_table_lookup(proc_dbg_info_src->baddr_to_so_info,
+ (gpointer) &baddr);
+ if (!so) {
+ /*
+ * The build_id event comes after the so has been
+ * created. If it isn't found, just ignore this event.
+ */
+ goto end;
+ }
+
+ so_info_set_build_id(so, build_id, build_id_len);
+
+end:
+ free(build_id);
+ return;
+}
+
+static
+void handle_statedump_debug_link_event(struct debug_info *debug_info,
+ struct ctf_event_definition *event_def)
+{
+ struct proc_debug_info_sources *proc_dbg_info_src;
+ struct bt_definition *event_fields_def = NULL;
+ struct bt_definition *sec_def = NULL;
+ struct bt_definition *baddr_def = NULL;
+ struct bt_definition *vpid_def = NULL;
+ struct bt_definition *filename_def = NULL;
+ struct bt_definition *crc32_def = NULL;
+ struct so_info *so = NULL;
+ int64_t vpid;
+ uint64_t baddr;
+ char *filename = NULL;
+ uint32_t crc32;
+
+ event_fields_def = (struct bt_definition *) event_def->event_fields;
+ sec_def = (struct bt_definition *)
+ event_def->stream->stream_event_context;
+
+ if (!event_fields_def || !sec_def) {
+ goto end;
+ }
+
+ baddr_def = bt_lookup_definition(event_fields_def, "_baddr");
+ if (!baddr_def) {
+ goto end;
+ }
+
+ vpid_def = bt_lookup_definition(sec_def, "_vpid");
+ if (!vpid_def) {
+ goto end;
+ }
+
+ filename_def = bt_lookup_definition(event_fields_def, "_filename");
+ if (!filename_def) {
+ goto end;
+ }
+
+ crc32_def = bt_lookup_definition(event_fields_def, "_crc32");
+ if (!crc32_def) {
+ goto end;
+ }
+
+ if (baddr_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ if (vpid_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ if (filename_def->declaration->id != BT_CTF_TYPE_ID_STRING) {
+ goto end;
+ }
+
+ if (crc32_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ baddr = bt_get_unsigned_int(baddr_def);
+ vpid = bt_get_signed_int(vpid_def);
+
+ proc_dbg_info_src = proc_debug_info_sources_ht_get_entry(
+ debug_info->vpid_to_proc_dbg_info_src, vpid);
+ if (!proc_dbg_info_src) {
+ goto end;
+ }
+
+ so = g_hash_table_lookup(proc_dbg_info_src->baddr_to_so_info,
+ (gpointer) &baddr);
+ if (!so) {
+ /*
+ * The debug_link event comes after the so has been
+ * created. If it isn't found, just ignore this event.
+ */
+ goto end;
+ }
+
+ filename = bt_get_string(filename_def);
+ crc32 = bt_get_unsigned_int(crc32_def);
+
+ so_info_set_debug_link(so, filename, crc32);
+
+end:
+ return;
+}
+
+static
+void handle_statedump_soinfo_event(struct debug_info *debug_info,
+ struct ctf_event_definition *event_def)
+{
+ struct bt_definition *baddr_def = NULL;
+ struct bt_definition *memsz_def = NULL;
+ struct bt_definition *sopath_def = NULL;
+ struct bt_definition *vpid_def = NULL;
+ struct bt_definition *event_fields_def = NULL;
+ struct bt_definition *sec_def = NULL;
+ struct proc_debug_info_sources *proc_dbg_info_src;
+ struct so_info *so;
+ uint64_t baddr, memsz;
+ int64_t vpid;
+ const char *sopath;
+
+ event_fields_def = (struct bt_definition *) event_def->event_fields;
+ sec_def = (struct bt_definition *)
+ event_def->stream->stream_event_context;
+
+ if (!event_fields_def || !sec_def) {
+ goto end;
+ }
+
+ baddr_def = bt_lookup_definition(event_fields_def, "_baddr");
+ if (!baddr_def) {
+ goto end;
+ }
+
+ memsz_def = bt_lookup_definition(event_fields_def, "_memsz");
+ if (!memsz_def) {
+ goto end;
+ }
+
+ sopath_def = bt_lookup_definition(event_fields_def, "_sopath");
+ if (!sopath_def) {
+ goto end;
+ }
+
+ vpid_def = bt_lookup_definition(sec_def, "_vpid");
+ if (!vpid_def) {
+ goto end;
+ }
+
+ if (baddr_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ if (memsz_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ if (sopath_def->declaration->id != BT_CTF_TYPE_ID_STRING) {
+ goto end;
+ }
+
+ if (vpid_def->declaration->id != BT_CTF_TYPE_ID_INTEGER) {
+ goto end;
+ }
+
+ baddr = bt_get_unsigned_int(baddr_def);
+ memsz = bt_get_unsigned_int(memsz_def);
+ sopath = bt_get_string(sopath_def);
+ vpid = bt_get_signed_int(vpid_def);
+
+ if (!sopath) {
+ goto end;
+ }
+
+ if (memsz == 0) {
+ /* Ignore VDSO. */
+ goto end;
+ }
+
+ proc_dbg_info_src = proc_debug_info_sources_ht_get_entry(
+ debug_info->vpid_to_proc_dbg_info_src, vpid);
+ if (!proc_dbg_info_src) {
+ goto end;
+ }
+
+ so = g_hash_table_lookup(proc_dbg_info_src->baddr_to_so_info,
+ (gpointer) baddr);
+ if (so) {
+ goto end;
+ }
+
+ so = so_info_create(sopath, baddr, memsz);
+ if (!so) {
+ goto end;
+ }
+
+ g_hash_table_insert(proc_dbg_info_src->baddr_to_so_info,
+ (gpointer) baddr, so);
+
+end:
+ return;
+}
+
+static
+void handle_statedump_start(struct debug_info *debug_info,
+ struct ctf_event_definition *event_def)
+{
+ struct bt_definition *vpid_def = NULL;
+ struct bt_definition *sec_def = NULL;
+ struct proc_debug_info_sources *proc_dbg_info_src;
+ int64_t vpid;
+
+ sec_def = (struct bt_definition *)
+ event_def->stream->stream_event_context;
+ if (!sec_def) {
+ goto end;
+ }
+
+ vpid_def = bt_lookup_definition(sec_def, "_vpid");
+ if (!vpid_def) {
+ goto end;
+ }
+
+ vpid = bt_get_signed_int(vpid_def);
+
+ proc_dbg_info_src = proc_debug_info_sources_ht_get_entry(
+ debug_info->vpid_to_proc_dbg_info_src, vpid);
+ if (!proc_dbg_info_src) {
+ goto end;
+ }
+
+ g_hash_table_remove_all(proc_dbg_info_src->baddr_to_so_info);
+ g_hash_table_remove_all(proc_dbg_info_src->ip_to_debug_info_src);
+
+end:
+ return;
+}
+
+static
+void register_event_debug_infos(struct debug_info *debug_info,
+ struct ctf_event_definition *event)
+{
+ struct bt_definition *ip_def, *vpid_def;
+ int64_t vpid;
+ uint64_t ip;
+ struct bt_definition *sec_def;
+
+ /* Get stream event context definition. */
+ sec_def = (struct bt_definition *) event->stream->stream_event_context;
+ if (!sec_def) {
+ goto end;
+ }
+
+ /* Get "ip" and "vpid" definitions. */
+ vpid_def = bt_lookup_definition((struct bt_definition *) sec_def,
+ "_vpid");
+ ip_def = bt_lookup_definition((struct bt_definition *) sec_def, "_ip");
+
+ if (!vpid_def || !ip_def) {
+ goto end;
+ }
+
+ vpid = bt_get_signed_int(vpid_def);
+ ip = bt_get_unsigned_int(ip_def);
+
+ /* Get debug info for this context. */
+ ((struct definition_integer *) ip_def)->debug_info_src =
+ debug_info_query(debug_info, vpid, ip);
+
+end:
+ return;
+}
+
+BT_HIDDEN
+void debug_info_handle_event(struct debug_info *debug_info,
+ struct ctf_event_definition *event)
+{
+ struct ctf_event_declaration *event_class;
+ struct ctf_stream_declaration *stream_class;
+
+ if (!debug_info || !event) {
+ goto end;
+ }
+
+ stream_class = event->stream->stream_class;
+ event_class = g_ptr_array_index(stream_class->events_by_id,
+ event->stream->event_id);
+
+ if (event_class->name == debug_info->q_statedump_soinfo ||
+ event_class->name == debug_info->q_dl_open) {
+ /* State dump/dlopen() */
+ handle_statedump_soinfo_event(debug_info, event);
+ } else if (event_class->name == debug_info->q_statedump_start) {
+ /* Start state dump */
+ handle_statedump_start(debug_info, event);
+ } else if (event_class->name == debug_info->q_statedump_debug_link) {
+ /* Debug link info */
+ handle_statedump_debug_link_event(debug_info, event);
+ } else if (event_class->name == debug_info->q_statedump_build_id) {
+ /* Build ID info */
+ handle_statedump_build_id_event(debug_info, event);
+ } else {
+ /* Other events: register debug infos */
+ register_event_debug_infos(debug_info, event);
+ }
+
+end:
+ return;
+}
--- /dev/null
+/*
+ * dwarf.c
+ *
+ * Babeltrace - DWARF Information Reader
+ *
+ * Copyright 2015 Antoine Busque <abusque@efficios.com>
+ *
+ * Author: Antoine Busque <abusque@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <glib.h>
+#include <babeltrace/dwarf.h>
+
+BT_HIDDEN
+struct bt_dwarf_cu *bt_dwarf_cu_create(Dwarf *dwarf_info)
+{
+ struct bt_dwarf_cu *cu;
+
+ if (!dwarf_info) {
+ goto error;
+ }
+
+ cu = g_new0(struct bt_dwarf_cu, 1);
+ if (!cu) {
+ goto error;
+ }
+ cu->dwarf_info = dwarf_info;
+ return cu;
+
+error:
+ return NULL;
+}
+
+BT_HIDDEN
+void bt_dwarf_cu_destroy(struct bt_dwarf_cu *cu)
+{
+ g_free(cu);
+}
+
+BT_HIDDEN
+int bt_dwarf_cu_next(struct bt_dwarf_cu *cu)
+{
+ int ret;
+ Dwarf_Off next_offset;
+ size_t cu_header_size;
+
+ if (!cu) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = dwarf_nextcu(cu->dwarf_info, cu->next_offset, &next_offset,
+ &cu_header_size, NULL, NULL, NULL);
+ if (ret) {
+ /* ret is -1 on error, 1 if no next CU. */
+ goto end;
+ }
+
+ cu->offset = cu->next_offset;
+ cu->next_offset = next_offset;
+ cu->header_size = cu_header_size;
+
+end:
+ return ret;
+}
+
+BT_HIDDEN
+struct bt_dwarf_die *bt_dwarf_die_create(struct bt_dwarf_cu *cu)
+{
+ Dwarf_Die *dwarf_die = NULL;
+ struct bt_dwarf_die *die = NULL;
+
+ if (!cu) {
+ goto error;
+ }
+
+ dwarf_die = g_new0(Dwarf_Die, 1);
+ if (!dwarf_die) {
+ goto error;
+ }
+
+ dwarf_die = dwarf_offdie(cu->dwarf_info, cu->offset + cu->header_size,
+ dwarf_die);
+ if (!dwarf_die) {
+ goto error;
+ }
+
+ die = g_new0(struct bt_dwarf_die, 1);
+ if (!die) {
+ goto error;
+ }
+
+ die->cu = cu;
+ die->dwarf_die = dwarf_die;
+ die->depth = 0;
+
+ return die;
+
+error:
+ g_free(dwarf_die);
+ g_free(die);
+ return NULL;
+}
+
+BT_HIDDEN
+void bt_dwarf_die_destroy(struct bt_dwarf_die *die)
+{
+ if (!die) {
+ return;
+ }
+
+ g_free(die->dwarf_die);
+ g_free(die);
+}
+
+BT_HIDDEN
+int bt_dwarf_die_child(struct bt_dwarf_die *die)
+{
+ int ret;
+ Dwarf_Die *child_die = NULL;
+
+ if (!die) {
+ ret = -1;
+ goto error;
+ }
+
+ child_die = g_new0(Dwarf_Die, 1);
+ if (!child_die) {
+ ret = -1;
+ goto error;
+ }
+
+ ret = dwarf_child(die->dwarf_die, child_die);
+ if (ret) {
+ /* ret is -1 on error, 1 if no child DIE. */
+ goto error;
+ }
+
+ g_free(die->dwarf_die);
+ die->dwarf_die = child_die;
+ die->depth++;
+ return 0;
+
+error:
+ g_free(child_die);
+ return ret;
+}
+
+BT_HIDDEN
+int bt_dwarf_die_next(struct bt_dwarf_die *die)
+{
+ int ret;
+ Dwarf_Die *next_die = NULL;
+
+ if (!die) {
+ ret = -1;
+ goto error;
+ }
+
+ next_die = g_new0(Dwarf_Die, 1);
+ if (!next_die) {
+ ret = -1;
+ goto error;
+ }
+
+ if (die->depth == 0) {
+ ret = dwarf_child(die->dwarf_die, next_die);
+ if (ret) {
+ /* ret is -1 on error, 1 if no child DIE. */
+ goto error;
+ }
+
+ die->depth = 1;
+ } else {
+ ret = dwarf_siblingof(die->dwarf_die, next_die);
+ if (ret) {
+ /* ret is -1 on error, 1 if we reached end of
+ * DIEs at this depth. */
+ goto error;
+ }
+ }
+
+ g_free(die->dwarf_die);
+ die->dwarf_die = next_die;
+ return 0;
+
+error:
+ g_free(next_die);
+ return ret;
+}
+
+BT_HIDDEN
+int bt_dwarf_die_get_tag(struct bt_dwarf_die *die, int *tag)
+{
+ int _tag;
+
+ if (!die || !tag) {
+ goto error;
+ }
+
+ _tag = dwarf_tag(die->dwarf_die);
+ if (_tag == DW_TAG_invalid) {
+ goto error;
+ }
+
+ *tag = _tag;
+ return 0;
+
+error:
+ return -1;
+}
+
+BT_HIDDEN
+int bt_dwarf_die_get_name(struct bt_dwarf_die *die, char **name)
+{
+ const char *_name;
+
+ if (!die || !name) {
+ goto error;
+ }
+
+ _name = dwarf_diename(die->dwarf_die);
+ if (!_name) {
+ goto error;
+ }
+
+ *name = strdup(_name);
+ if (!*name) {
+ goto error;
+ }
+
+ return 0;
+
+error:
+ return -1;
+}
+
+BT_HIDDEN
+int bt_dwarf_die_get_call_file(struct bt_dwarf_die *die, char **filename)
+{
+ int ret;
+ Dwarf_Sword file_no;
+ const char *_filename = NULL;
+ Dwarf_Files *src_files = NULL;
+ Dwarf_Attribute *file_attr = NULL;
+ struct bt_dwarf_die *cu_die = NULL;
+
+ if (!die || !filename) {
+ goto error;
+ }
+
+ file_attr = g_new0(Dwarf_Attribute, 1);
+ if (!file_attr) {
+ goto error;
+ }
+
+ file_attr = dwarf_attr(die->dwarf_die, DW_AT_call_file, file_attr);
+ if (!file_attr) {
+ goto error;
+ }
+
+ ret = dwarf_formsdata(file_attr, &file_no);
+ if (ret) {
+ goto error;
+ }
+
+ cu_die = bt_dwarf_die_create(die->cu);
+ if (!cu_die) {
+ goto error;
+ }
+
+ ret = dwarf_getsrcfiles(cu_die->dwarf_die, &src_files, NULL);
+ if (ret) {
+ goto error;
+ }
+
+ _filename = dwarf_filesrc(src_files, file_no, NULL, NULL);
+ if (!_filename) {
+ goto error;
+ }
+
+ *filename = strdup(_filename);
+
+ bt_dwarf_die_destroy(cu_die);
+ g_free(file_attr);
+
+ return 0;
+
+error:
+ bt_dwarf_die_destroy(cu_die);
+ g_free(file_attr);
+
+ return -1;
+}
+
+BT_HIDDEN
+int bt_dwarf_die_get_call_line(struct bt_dwarf_die *die,
+ uint64_t *line_no)
+{
+ int ret = 0;
+ Dwarf_Attribute *line_attr = NULL;
+ uint64_t _line_no;
+
+ if (!die || !line_no) {
+ goto error;
+ }
+
+ line_attr = g_new0(Dwarf_Attribute, 1);
+ if (!line_attr) {
+ goto error;
+ }
+
+ line_attr = dwarf_attr(die->dwarf_die, DW_AT_call_line, line_attr);
+ if (!line_attr) {
+ goto error;
+ }
+
+ ret = dwarf_formudata(line_attr, &_line_no);
+ if (ret) {
+ goto error;
+ }
+
+ *line_no = _line_no;
+ g_free(line_attr);
+
+ return 0;
+
+error:
+ g_free(line_attr);
+
+ return -1;
+}
+
+BT_HIDDEN
+int bt_dwarf_die_contains_addr(struct bt_dwarf_die *die, uint64_t addr,
+ int *contains)
+{
+ int ret;
+
+ ret = dwarf_haspc(die->dwarf_die, addr);
+ if (ret == -1) {
+ goto error;
+ }
+
+ *contains = ret;
+
+ return 0;
+
+error:
+ return -1;
+}
--- /dev/null
+/*
+ * so-info.c
+ *
+ * Babeltrace - Executable and Shared Object Debug Info Reader
+ *
+ * Copyright 2015 Antoine Busque <abusque@efficios.com>
+ *
+ * Author: Antoine Busque <abusque@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <fcntl.h>
+#include <math.h>
+#include <libgen.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <dwarf.h>
+#include <glib.h>
+#include <babeltrace/dwarf.h>
+#include <babeltrace/so-info.h>
+#include <babeltrace/crc32.h>
+#include <babeltrace/babeltrace-internal.h>
+
+/*
+ * An address printed in hex is at most 20 bytes (16 for 64-bits +
+ * leading 0x + optional leading '+' if addr is an offset + null
+ * character).
+ */
+#define ADDR_STR_LEN 20
+
+BT_HIDDEN
+int so_info_init(void)
+{
+ int ret = 0;
+
+ if (elf_version(EV_CURRENT) == EV_NONE) {
+ fprintf(stderr, "ELF library initialization failed: %s\n",
+ elf_errmsg(-1));
+ ret = -1;
+ }
+
+ return ret;
+}
+
+BT_HIDDEN
+struct so_info *so_info_create(const char *path, uint64_t low_addr,
+ uint64_t memsz)
+{
+ struct so_info *so = NULL;
+ GElf_Ehdr *ehdr = NULL;
+
+ if (!path) {
+ goto error;
+ }
+
+ so = g_new0(struct so_info, 1);
+ if (!so) {
+ goto error;
+ }
+
+ so->elf_path = strdup(path);
+ if (!so->elf_path) {
+ goto error;
+ }
+
+ so->elf_fd = open(path, O_RDONLY);
+ if (so->elf_fd < 0) {
+ fprintf(stderr, "Failed to open %s\n", path);
+ goto error;
+ }
+
+ so->elf_file = elf_begin(so->elf_fd, ELF_C_READ, NULL);
+ if (!so->elf_file) {
+ fprintf(stderr, "elf_begin failed: %s\n", elf_errmsg(-1));
+ goto error;
+ }
+
+ if (elf_kind(so->elf_file) != ELF_K_ELF) {
+ fprintf(stderr, "Error: %s is not an ELF object\n",
+ so->elf_path);
+ goto error;
+ }
+
+ ehdr = g_new0(GElf_Ehdr, 1);
+ if (!ehdr) {
+ goto error;
+ }
+
+ if (!gelf_getehdr(so->elf_file, ehdr)) {
+ fprintf(stderr, "Error: couldn't get ehdr for %s\n",
+ so->elf_path);
+ goto error;
+ }
+
+ /* Position independent code has an e_type value of ET_DYN. */
+ so->is_pic = ehdr->e_type == ET_DYN;
+ so->memsz = memsz;
+ so->low_addr = low_addr;
+ so->high_addr = so->low_addr + so->memsz;
+
+ g_free(ehdr);
+ return so;
+
+error:
+ g_free(ehdr);
+ so_info_destroy(so);
+ return NULL;
+}
+
+BT_HIDDEN
+void so_info_destroy(struct so_info *so)
+{
+ if (!so) {
+ return;
+ }
+
+ dwarf_end(so->dwarf_info);
+
+ free(so->elf_path);
+ free(so->dwarf_path);
+ free(so->build_id);
+ free(so->dbg_link_filename);
+
+ elf_end(so->elf_file);
+
+ close(so->elf_fd);
+ close(so->dwarf_fd);
+
+ g_free(so);
+}
+
+BT_HIDDEN
+int so_info_set_build_id(struct so_info *so, uint8_t *build_id,
+ size_t build_id_len)
+{
+ if (!so || !build_id) {
+ goto error;
+ }
+
+ so->build_id = malloc(build_id_len);
+ if (!so->build_id) {
+ goto error;
+ }
+
+ memcpy(so->build_id, build_id, build_id_len);
+ so->build_id_len = build_id_len;
+
+ /*
+ * Reset the is_elf_only flag in case it had been set
+ * previously, because we might find separate debug info using
+ * the new build id information.
+ */
+ so->is_elf_only = false;
+
+ return 0;
+
+error:
+
+ return -1;
+}
+
+BT_HIDDEN
+int so_info_set_debug_link(struct so_info *so, char *filename, uint32_t crc)
+{
+ if (!so || !filename) {
+ goto error;
+ }
+
+ so->dbg_link_filename = strdup(filename);
+ if (!so->dbg_link_filename) {
+ goto error;
+ }
+
+ so->dbg_link_crc = crc;
+
+ /*
+ * Reset the is_elf_only flag in case it had been set
+ * previously, because we might find separate debug info using
+ * the new build id information.
+ */
+ so->is_elf_only = false;
+
+ return 0;
+
+error:
+
+ return -1;
+}
+
+/**
+ * Tries to read DWARF info from the location given by path, and
+ * attach it to the given so_info instance if it exists.
+ *
+ * @param so so_info instance for which to set DWARF info
+ * @param path Presumed location of the DWARF info
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_set_dwarf_info_from_path(struct so_info *so, char *path)
+{
+ int fd = -1, ret = 0;
+ struct bt_dwarf_cu *cu = NULL;
+ Dwarf *dwarf_info = NULL;
+
+ if (!so || !path) {
+ goto error;
+ }
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ goto error;
+ }
+
+ dwarf_info = dwarf_begin(fd, DWARF_C_READ);
+ if (!dwarf_info) {
+ goto error;
+ }
+
+ /*
+ * Check if the dwarf info has any CU. If not, the SO's object
+ * file contains no DWARF info.
+ */
+ cu = bt_dwarf_cu_create(dwarf_info);
+ if (!cu) {
+ goto error;
+ }
+
+ ret = bt_dwarf_cu_next(cu);
+ if (ret) {
+ goto error;
+ }
+
+ so->dwarf_fd = fd;
+ so->dwarf_path = strdup(path);
+ if (!so->dwarf_path) {
+ goto error;
+ }
+ so->dwarf_info = dwarf_info;
+ free(cu);
+
+ return 0;
+
+error:
+ close(fd);
+ dwarf_end(dwarf_info);
+ g_free(dwarf_info);
+ free(cu);
+
+ return -1;
+}
+
+/**
+ * Try to set the dwarf_info for a given so_info instance via the
+ * build ID method.
+ *
+ * @param so so_info instance for which to retrieve the
+ * DWARF info via build ID
+ * @returns 0 on success (i.e. dwarf_info set), -1 on failure
+ */
+static
+int so_info_set_dwarf_info_build_id(struct so_info *so)
+{
+ int i = 0, ret = 0, dbg_dir_trailing_slash = 0;
+ char *path = NULL, *build_id_file = NULL;
+ const char *dbg_dir = NULL;
+ size_t build_id_file_len, path_len;
+
+ if (!so || !so->build_id) {
+ goto error;
+ }
+
+ dbg_dir = opt_debug_dir ? : DEFAULT_DEBUG_DIR;
+
+ dbg_dir_trailing_slash = dbg_dir[strlen(dbg_dir) - 1] == '/';
+
+ /* 2 characters per byte printed in hex, +2 for '/' and '\0' */
+ build_id_file_len = (2 * so->build_id_len) + 2;
+ build_id_file = malloc(build_id_file_len);
+ if (!build_id_file) {
+ goto error;
+ }
+
+ snprintf(build_id_file, 4, "%02x/", so->build_id[0]);
+ for (i = 1; i < so->build_id_len; ++i) {
+ int path_idx = 3 + 2 * (i - 1);
+
+ snprintf(&build_id_file[path_idx], 3, "%02x", so->build_id[i]);
+ }
+
+ path_len = strlen(dbg_dir) + strlen(BUILD_ID_SUBDIR) +
+ strlen(build_id_file) + strlen(BUILD_ID_SUFFIX) + 1;
+ if (!dbg_dir_trailing_slash) {
+ path_len += 1;
+ }
+
+ path = malloc(path_len);
+ if (!path) {
+ goto error;
+ }
+
+ strcpy(path, dbg_dir);
+ if (!dbg_dir_trailing_slash) {
+ strcat(path, "/");
+ }
+ strcat(path, BUILD_ID_SUBDIR);
+ strcat(path, build_id_file);
+ strcat(path, BUILD_ID_SUFFIX);
+
+ ret = so_info_set_dwarf_info_from_path(so, path);
+ if (ret) {
+ goto error;
+ }
+
+ goto end;
+
+error:
+ ret = -1;
+end:
+ free(build_id_file);
+ free(path);
+
+ return ret;
+}
+
+/**
+ * Tests whether the file located at path exists and has the expected
+ * checksum.
+ *
+ * This predicate is used when looking up separate debug info via the
+ * GNU debuglink method. The expected crc can be found .gnu_debuglink
+ * section in the original ELF file, along with the filename for the
+ * file containing the debug info.
+ *
+ * @param path Full path at which to look for the debug file
+ * @param crc Expected checksum for the debug file
+ * @returns 1 if the file exists and has the correct checksum,
+ * 0 otherwise
+ */
+static
+int is_valid_debug_file(char *path, uint32_t crc)
+{
+ int ret = 0, fd = -1;
+ uint32_t _crc = 0;
+
+ if (!path) {
+ goto end;
+ }
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ goto end;
+ }
+
+ ret = crc32(fd, &_crc);
+ if (ret) {
+ ret = 0;
+ goto end;
+ }
+
+ ret = (crc == _crc);
+
+end:
+ close(fd);
+ return ret;
+}
+
+/**
+ * Try to set the dwarf_info for a given so_info instance via the
+ * build ID method.
+ *
+ * @param so so_info instance for which to retrieve the
+ * DWARF info via debug link
+ * @returns 0 on success (i.e. dwarf_info set), -1 on failure
+ */
+static
+int so_info_set_dwarf_info_debug_link(struct so_info *so)
+{
+ int ret = 0;
+ const char *dbg_dir = NULL;
+ char *dir_name = NULL, *so_dir = NULL, *path = NULL;
+ size_t max_path_len = 0;
+
+ if (!so || !so->dbg_link_filename) {
+ goto error;
+ }
+
+ dbg_dir = opt_debug_dir ? : DEFAULT_DEBUG_DIR;
+
+ dir_name = dirname(so->elf_path);
+ if (!dir_name) {
+ goto error;
+ }
+
+ /* so_dir is just dir_name with a trailing slash */
+ so_dir = malloc(strlen(dir_name) + 2);
+ if (!so_dir) {
+ goto error;
+ }
+
+ strcpy(so_dir, dir_name);
+ strcat(so_dir, "/");
+
+ max_path_len = strlen(dbg_dir) + strlen(so_dir) +
+ strlen(DEBUG_SUBDIR) + strlen(so->dbg_link_filename)
+ + 1;
+ path = malloc(max_path_len);
+ if (!path) {
+ goto error;
+ }
+
+ /* First look in the SO's dir */
+ strcpy(path, so_dir);
+ strcat(path, so->dbg_link_filename);
+
+ if (is_valid_debug_file(path, so->dbg_link_crc)) {
+ goto found;
+ }
+
+ /* If not found, look in .debug subdir */
+ strcpy(path, so_dir);
+ strcat(path, DEBUG_SUBDIR);
+ strcat(path, so->dbg_link_filename);
+
+ if (is_valid_debug_file(path, so->dbg_link_crc)) {
+ goto found;
+ }
+
+ /* Lastly, look under the global debug directory */
+ strcpy(path, dbg_dir);
+ strcat(path, so_dir);
+ strcat(path, so->dbg_link_filename);
+
+ if (is_valid_debug_file(path, so->dbg_link_crc)) {
+ goto found;
+ }
+
+error:
+ ret = -1;
+end:
+ free(path);
+ free(so_dir);
+
+ return ret;
+
+found:
+ ret = so_info_set_dwarf_info_from_path(so, path);
+ if (ret) {
+ goto error;
+ }
+
+ goto end;
+}
+
+/**
+ * Initialize the DWARF info for a given executable.
+ *
+ * @param so so_info instance
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_set_dwarf_info(struct so_info *so)
+{
+ int ret = 0;
+
+ if (!so) {
+ goto error;
+ }
+
+ /* First try to set the DWARF info from the ELF file */
+ ret = so_info_set_dwarf_info_from_path(so, so->elf_path);
+ if (!ret) {
+ goto end;
+ }
+
+ /*
+ * If that fails, try to find separate debug info via build ID
+ * and debug link.
+ */
+ ret = so_info_set_dwarf_info_build_id(so);
+ if (!ret) {
+ goto end;
+ }
+
+ ret = so_info_set_dwarf_info_debug_link(so);
+ if (!ret) {
+ goto end;
+ }
+
+error:
+ ret = -1;
+end:
+ return ret;
+}
+
+BT_HIDDEN
+void source_location_destroy(struct source_location *src_loc)
+{
+ if (!src_loc) {
+ return;
+ }
+
+ free(src_loc->filename);
+ g_free(src_loc);
+}
+
+/**
+ * Try to find the symbol closest to an address within a given ELF
+ * section.
+ *
+ * Only function symbols are taken into account. The symbol's address
+ * must precede `addr`. A symbol with a closer address might exist
+ * after `addr` but is irrelevant because it cannot encompass `addr`.
+ *
+ * On success, if found, the out parameters `sym` and `shdr` are
+ * set. On failure or if none are found, they remain unchanged.
+ *
+ * @param scn ELF section in which to look for the address
+ * @param addr Virtual memory address for which to find the
+ * nearest function symbol
+ * @param sym Out parameter, the nearest function symbol
+ * @param shdr Out parameter, the section header for scn
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_get_nearest_symbol_from_section(Elf_Scn *scn, uint64_t addr,
+ GElf_Sym **sym, GElf_Shdr **shdr)
+{
+ int i;
+ size_t symbol_count;
+ Elf_Data *data = NULL;
+ GElf_Shdr *_shdr = NULL;
+ GElf_Sym *nearest_sym = NULL;
+
+ if (!scn || !sym || !shdr) {
+ goto error;
+ }
+
+ _shdr = g_new0(GElf_Shdr, 1);
+ if (!_shdr) {
+ goto error;
+ }
+
+ _shdr = gelf_getshdr(scn, _shdr);
+ if (!_shdr) {
+ goto error;
+ }
+
+ if (_shdr->sh_type != SHT_SYMTAB) {
+ /*
+ * We are only interested in symbol table (symtab)
+ * sections, skip this one.
+ */
+ goto end;
+ }
+
+ data = elf_getdata(scn, NULL);
+ if (!data) {
+ goto error;
+ }
+
+ symbol_count = _shdr->sh_size / _shdr->sh_entsize;
+
+ for (i = 0; i < symbol_count; ++i) {
+ GElf_Sym *cur_sym = NULL;
+
+ cur_sym = g_new0(GElf_Sym, 1);
+ if (!cur_sym) {
+ goto error;
+ }
+ cur_sym = gelf_getsym(data, i, cur_sym);
+ if (!cur_sym) {
+ goto error;
+ }
+ if (GELF_ST_TYPE(cur_sym->st_info) != STT_FUNC) {
+ /* We're only interested in the functions. */
+ g_free(cur_sym);
+ continue;
+ }
+
+ if (cur_sym->st_value <= addr &&
+ (!nearest_sym ||
+ cur_sym->st_value > nearest_sym->st_value)) {
+ g_free(nearest_sym);
+ nearest_sym = cur_sym;
+ } else {
+ g_free(cur_sym);
+ }
+ }
+
+end:
+ if (nearest_sym) {
+ *sym = nearest_sym;
+ *shdr = _shdr;
+ } else {
+ g_free(_shdr);
+ }
+
+ return 0;
+
+error:
+ g_free(nearest_sym);
+ g_free(_shdr);
+ return -1;
+}
+
+/**
+ * Get the name of the function containing a given address within an
+ * executable using ELF symbols.
+ *
+ * The function name is in fact the name of the nearest ELF symbol,
+ * followed by the offset in bytes between the address and the symbol
+ * (in hex), separated by a '+' character.
+ *
+ * If found, the out parameter `func_name` is set on success. On failure,
+ * it remains unchanged.
+ *
+ * @param so so_info instance for the executable containing
+ * the address
+ * @param addr Virtual memory address for which to find the
+ * function name
+ * @param func_name Out parameter, the function name
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_lookup_elf_function_name(struct so_info *so, uint64_t addr,
+ char **func_name)
+{
+ /*
+ * TODO (possible optimisation): if an ELF has no symtab
+ * section, it has been stripped. Therefore, it would be wise
+ * to store a flag indicating the stripped status after the
+ * first iteration to prevent subsequent ones.
+ */
+ int ret = 0;
+ Elf_Scn *scn = NULL;
+ GElf_Sym *sym = NULL;
+ GElf_Shdr *shdr = NULL;
+ char *sym_name = NULL;
+ char *_func_name = NULL;
+ char offset_str[ADDR_STR_LEN];
+
+ scn = elf_nextscn(so->elf_file, scn);
+ if (!scn) {
+ goto error;
+ }
+
+ while (scn && !sym) {
+ ret = so_info_get_nearest_symbol_from_section(
+ scn, addr, &sym, &shdr);
+ if (ret) {
+ goto error;
+ }
+
+ scn = elf_nextscn(so->elf_file, scn);
+ }
+
+ if (sym) {
+ sym_name = elf_strptr(so->elf_file, shdr->sh_link,
+ sym->st_name);
+ if (!sym_name) {
+ goto error;
+ }
+
+ snprintf(offset_str, ADDR_STR_LEN, "+%#0" PRIx64,
+ addr - sym->st_value);
+ _func_name = malloc(strlen(sym_name) + ADDR_STR_LEN);
+ if (!_func_name) {
+ goto error;
+ }
+
+ strcpy(_func_name, sym_name);
+ strcat(_func_name, offset_str);
+ *func_name = _func_name;
+ }
+
+ g_free(shdr);
+ g_free(sym);
+ return 0;
+
+error:
+ g_free(shdr);
+ g_free(sym);
+ free(_func_name);
+ return -1;
+}
+
+/**
+ * Get the name of the function containing a given address within a
+ * given compile unit (CU).
+ *
+ * If found, the out parameter `func_name` is set on success. On
+ * failure, it remains unchanged.
+ *
+ * @param cu bt_dwarf_cu instance which may contain the address
+ * @param addr Virtual memory address for which to find the
+ * function name
+ * @param func_name Out parameter, the function name
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_lookup_cu_function_name(struct bt_dwarf_cu *cu, uint64_t addr,
+ char **func_name)
+{
+ int ret = 0, found = 0;
+ char *_func_name = NULL;
+ struct bt_dwarf_die *die = NULL;
+
+ if (!cu || !func_name) {
+ goto error;
+ }
+
+ die = bt_dwarf_die_create(cu);
+ if (!die) {
+ goto error;
+ }
+
+ while (bt_dwarf_die_next(die) == 0) {
+ int tag;
+
+ ret = bt_dwarf_die_get_tag(die, &tag);
+ if (ret) {
+ goto error;
+ }
+
+ if (tag == DW_TAG_subprogram) {
+ ret = bt_dwarf_die_contains_addr(die, addr, &found);
+ if (ret) {
+ goto error;
+ }
+
+ if (found) {
+ break;
+ }
+ }
+ }
+
+ if (found) {
+ ret = bt_dwarf_die_get_name(die, &_func_name);
+ if (ret) {
+ goto error;
+ }
+
+ *func_name = _func_name;
+ }
+
+ bt_dwarf_die_destroy(die);
+ return 0;
+
+error:
+ bt_dwarf_die_destroy(die);
+ return -1;
+}
+
+/**
+ * Get the name of the function containing a given address within an
+ * executable using DWARF debug info.
+ *
+ * If found, the out parameter `func_name` is set on success. On
+ * failure, it remains unchanged.
+ *
+ * @param so so_info instance for the executable containing
+ * the address
+ * @param addr Virtual memory address for which to find the
+ * function name
+ * @param func_name Out parameter, the function name
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_lookup_dwarf_function_name(struct so_info *so, uint64_t addr,
+ char **func_name)
+{
+ int ret = 0;
+ char *_func_name = NULL;
+ struct bt_dwarf_cu *cu = NULL;
+
+ if (!so || !func_name) {
+ goto error;
+ }
+
+ cu = bt_dwarf_cu_create(so->dwarf_info);
+ if (!cu) {
+ goto error;
+ }
+
+ while (bt_dwarf_cu_next(cu) == 0) {
+ ret = so_info_lookup_cu_function_name(cu, addr, &_func_name);
+ if (ret) {
+ goto error;
+ }
+
+ if (_func_name) {
+ break;
+ }
+ }
+
+ if (_func_name) {
+ *func_name = _func_name;
+ }
+
+ bt_dwarf_cu_destroy(cu);
+ return 0;
+
+error:
+ bt_dwarf_cu_destroy(cu);
+ return -1;
+}
+
+BT_HIDDEN
+int so_info_lookup_function_name(struct so_info *so, uint64_t addr,
+ char **func_name)
+{
+ int ret = 0;
+ char *_func_name = NULL;
+
+ if (!so || !func_name) {
+ goto error;
+ }
+
+ /* Set DWARF info if it hasn't been accessed yet. */
+ if (!so->dwarf_info && !so->is_elf_only) {
+ ret = so_info_set_dwarf_info(so);
+ if (ret) {
+ /* Failed to set DWARF info, fallback to ELF. */
+ so->is_elf_only = true;
+ }
+ }
+
+ if (!so_info_has_address(so, addr)) {
+ goto error;
+ }
+
+ /*
+ * Addresses in ELF and DWARF are relative to base address for
+ * PIC, so make the address argument relative too if needed.
+ */
+ if (so->is_pic) {
+ addr -= so->low_addr;
+ }
+
+ if (so->is_elf_only) {
+ ret = so_info_lookup_elf_function_name(so, addr, &_func_name);
+ } else {
+ ret = so_info_lookup_dwarf_function_name(so, addr, &_func_name);
+ }
+
+ if (ret) {
+ goto error;
+ }
+
+ if (_func_name) {
+ *func_name = _func_name;
+ }
+
+ return 0;
+
+error:
+ return -1;
+}
+
+/**
+ * Predicate used to determine whether the children of a given DIE
+ * contain a specific address.
+ *
+ * More specifically, the parameter `die` is expected to be a
+ * subprogram (function) DIE, and this predicate tells whether any
+ * subroutines are inlined within this function and would contain
+ * `addr`.
+ *
+ * Do note that this function advances the position of `die`. If the
+ * address is found within one of its children, `die` will be pointing
+ * to that child upon returning from the function, allowing to extract
+ * the information deemed necessary.
+ *
+ * @param die The parent DIE in whose children the address will be
+ * looked for
+ * @param addr The address for which to look for in the DIEs
+ * @returns Returns 1 if the address was found, 0 if not
+ */
+static
+int so_info_child_die_has_address(struct bt_dwarf_die *die, uint64_t addr)
+{
+ int ret = 0, contains = 0;
+
+ if (!die) {
+ goto error;
+ }
+
+ ret = bt_dwarf_die_child(die);
+ if (ret) {
+ goto error;
+ }
+
+ do {
+ int tag;
+
+ ret = bt_dwarf_die_get_tag(die, &tag);
+ if (ret) {
+ goto error;
+ }
+
+ if (tag == DW_TAG_inlined_subroutine) {
+ ret = bt_dwarf_die_contains_addr(die, addr, &contains);
+ if (ret) {
+ goto error;
+ }
+
+ if (contains) {
+ ret = 1;
+ goto end;
+ }
+ }
+ } while (bt_dwarf_die_next(die) == 0);
+
+end:
+ return ret;
+
+error:
+ ret = 0;
+ goto end;
+}
+
+/**
+ * Lookup the source location for a given address within a CU, making
+ * the assumption that it is contained within an inline routine in a
+ * function.
+ *
+ * @param cu bt_dwarf_cu instance in which to look for the address
+ * @param addr The address for which to look for
+ * @param src_loc Out parameter, the source location (filename and
+ * line number) for the address
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_lookup_cu_src_loc_inl(struct bt_dwarf_cu *cu, uint64_t addr,
+ struct source_location **src_loc)
+{
+ int ret = 0, found = 0;
+ struct bt_dwarf_die *die = NULL;
+ struct source_location *_src_loc = NULL;
+
+ if (!cu || !src_loc) {
+ goto error;
+ }
+
+ die = bt_dwarf_die_create(cu);
+ if (!die) {
+ goto error;
+ }
+
+ while (bt_dwarf_die_next(die) == 0) {
+ int tag;
+
+ ret = bt_dwarf_die_get_tag(die, &tag);
+ if (ret) {
+ goto error;
+ }
+
+ if (tag == DW_TAG_subprogram) {
+ int contains = 0;
+
+ ret = bt_dwarf_die_contains_addr(die, addr, &contains);
+ if (ret) {
+ goto error;
+ }
+
+ if (contains) {
+ /*
+ * Try to find an inlined subroutine
+ * child of this DIE containing addr.
+ */
+ found = so_info_child_die_has_address(
+ die, addr);
+ goto end;
+ }
+ }
+ }
+
+end:
+ if (found) {
+ char *filename = NULL;
+ uint64_t line_no;
+
+ _src_loc = g_new0(struct source_location, 1);
+ if (!_src_loc) {
+ goto error;
+ }
+
+ ret = bt_dwarf_die_get_call_file(die, &filename);
+ if (ret) {
+ goto error;
+ }
+ ret = bt_dwarf_die_get_call_line(die, &line_no);
+ if (ret) {
+ free(filename);
+ goto error;
+ }
+
+ _src_loc->filename = filename;
+ _src_loc->line_no = line_no;
+ *src_loc = _src_loc;
+ }
+
+ bt_dwarf_die_destroy(die);
+ return 0;
+
+error:
+ source_location_destroy(_src_loc);
+ bt_dwarf_die_destroy(die);
+ return -1;
+}
+
+/**
+ * Lookup the source location for a given address within a CU,
+ * assuming that it is contained within an inlined function.
+ *
+ * A source location can be found regardless of inlining status for
+ * this method, but in the case of an inlined function, the returned
+ * source location will point not to the callsite but rather to the
+ * definition site of the inline function.
+ *
+ * @param cu bt_dwarf_cu instance in which to look for the address
+ * @param addr The address for which to look for
+ * @param src_loc Out parameter, the source location (filename and
+ * line number) for the address
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_lookup_cu_src_loc_no_inl(struct bt_dwarf_cu *cu, uint64_t addr,
+ struct source_location **src_loc)
+{
+ struct source_location *_src_loc = NULL;
+ struct bt_dwarf_die *die = NULL;
+ const char *filename = NULL;
+ Dwarf_Line *line = NULL;
+ Dwarf_Addr line_addr;
+ int ret, line_no;
+
+ if (!cu || !src_loc) {
+ goto error;
+ }
+
+ die = bt_dwarf_die_create(cu);
+ if (!die) {
+ goto error;
+ }
+
+ line = dwarf_getsrc_die(die->dwarf_die, addr);
+ if (!line) {
+ goto error;
+ }
+
+ ret = dwarf_lineaddr(line, &line_addr);
+ if (ret) {
+ goto error;
+ }
+
+ filename = dwarf_linesrc(line, NULL, NULL);
+ if (!filename) {
+ goto error;
+ }
+
+ if (addr == line_addr) {
+ _src_loc = g_new0(struct source_location, 1);
+ if (!_src_loc) {
+ goto error;
+ }
+
+ ret = dwarf_lineno(line, &line_no);
+ if (ret) {
+ goto error;
+ }
+
+ _src_loc->line_no = line_no;
+ _src_loc->filename = strdup(filename);
+ }
+
+ bt_dwarf_die_destroy(die);
+
+ if (_src_loc) {
+ *src_loc = _src_loc;
+ }
+
+ return 0;
+
+error:
+ source_location_destroy(_src_loc);
+ bt_dwarf_die_destroy(die);
+ return -1;
+}
+
+/**
+ * Get the source location (file name and line number) for a given
+ * address within a compile unit (CU).
+ *
+ * On success, the out parameter `src_loc` is set if found. On
+ * failure, it remains unchanged.
+ *
+ * @param so bt_dwarf_cu instance for the compile unit which
+ * may contain the address
+ * @param addr Virtual memory address for which to find the
+ * source location
+ * @param src_loc Out parameter, the source location
+ * @returns 0 on success, -1 on failure
+ */
+static
+int so_info_lookup_cu_src_loc(struct bt_dwarf_cu *cu, uint64_t addr,
+ struct source_location **src_loc)
+{
+ int ret = 0;
+ struct source_location *_src_loc = NULL;
+
+ if (!cu || !src_loc) {
+ goto error;
+ }
+
+ ret = so_info_lookup_cu_src_loc_inl(cu, addr, &_src_loc);
+ if (ret) {
+ goto error;
+ }
+
+ if (_src_loc) {
+ goto end;
+ }
+
+ ret = so_info_lookup_cu_src_loc_no_inl(cu, addr, &_src_loc);
+ if (ret) {
+ goto error;
+ }
+
+ if (_src_loc) {
+ goto end;
+ }
+
+end:
+ if (_src_loc) {
+ *src_loc = _src_loc;
+ }
+
+ return 0;
+
+error:
+ source_location_destroy(_src_loc);
+ return -1;
+}
+
+BT_HIDDEN
+int so_info_lookup_source_location(struct so_info *so, uint64_t addr,
+ struct source_location **src_loc)
+{
+ struct bt_dwarf_cu *cu = NULL;
+ struct source_location *_src_loc = NULL;
+
+ if (!so || !src_loc) {
+ goto error;
+ }
+
+ /* Set DWARF info if it hasn't been accessed yet. */
+ if (!so->dwarf_info && !so->is_elf_only) {
+ if (so_info_set_dwarf_info(so)) {
+ /* Failed to set DWARF info. */
+ so->is_elf_only = true;
+ }
+ }
+
+ if (so->is_elf_only) {
+ /* We cannot lookup source location without DWARF info. */
+ goto error;
+ }
+
+ if (!so_info_has_address(so, addr)) {
+ goto error;
+ }
+
+ /*
+ * Addresses in ELF and DWARF are relative to base address for
+ * PIC, so make the address argument relative too if needed.
+ */
+ if (so->is_pic) {
+ addr -= so->low_addr;
+ }
+
+ cu = bt_dwarf_cu_create(so->dwarf_info);
+ if (!cu) {
+ goto error;
+ }
+
+ while (bt_dwarf_cu_next(cu) == 0) {
+ int ret;
+
+ ret = so_info_lookup_cu_src_loc(cu, addr, &_src_loc);
+ if (ret) {
+ goto error;
+ }
+
+ if (_src_loc) {
+ break;
+ }
+ }
+
+ bt_dwarf_cu_destroy(cu);
+ if (_src_loc) {
+ *src_loc = _src_loc;
+ }
+
+ return 0;
+
+error:
+ source_location_destroy(_src_loc);
+ bt_dwarf_cu_destroy(cu);
+ return -1;
+}
{
struct declaration_integer *integer_declaration;
- integer_declaration = g_new(struct declaration_integer, 1);
+ integer_declaration = g_new0(struct declaration_integer, 1);
integer_declaration->p.id = CTF_TYPE_INTEGER;
integer_declaration->p.alignment = alignment;
integer_declaration->p.declaration_free = _integer_declaration_free;
struct definition_integer *integer;
int ret;
- integer = g_new(struct definition_integer, 1);
+ integer = g_new0(struct definition_integer, 1);
bt_declaration_ref(&integer_declaration->p);
integer->p.declaration = declaration;
integer->declaration = integer_declaration;