| DWARF_GET_MACRO_DETAILS(3) | Library Functions Manual | DWARF_GET_MACRO_DETAILS(3) |
dwarf_get_macro_details —
#include <libdwarf.h>
int
dwarf_get_macro_details(Dwarf_Debug
dbg, Dwarf_Off offset,
Dwarf_Unsigned max_count, Dwarf_Signed
*entry_cnt, Dwarf_Macro_Details **details,
Dwarf_Error *err);
dwarf_get_macro_details() retrieves information
about macros associated with a DWARF debug context. Information about macro
entries are returned as an array of descriptors of type
Dwarf_Macro_Details, with each
Dwarf_Macro_Details descriptor describing one macro
information entry.
Argument dbg should reference a DWARF debug
context allocated using
dwarf_init(3). Argument
offset is an offset, relative to the
“.debug_macinfo” section, to the start of the desired macro
information. Argument max_count specifies the maximum
number of macro information entries to be returned, or 0 if all entries are
to be returned. Argument entry_cnt should point to a
location that will be set to the number of entries actually returned.
Argument details should point to a location that will
be set to a pointer to an array of Dwarf_Macro_Details
descriptors. If argument err is not
NULL, it will be used to store error information in
case of an error.
Dwarf_Macro_Details descriptors are defined
in the header file
<libdwarf.h>, and consist of
the following fields:
DW_MACINFO_* constants defined by the DWARF
specification.DW_MACINFO_start_file.DW_MACINFO_defineDW_MACINFO_undefDW_MACINFO_vendor_extNULL for other values of
dmd_type.dwarf_dealloc() with the allocation
type DW_DLA_STRING to indicate that the memory may be
freed.
dwarf_get_macro_details() returns
DW_DLV_OK when it succeeds. It returns
DW_DLV_NO_ENTRY if there is no more macro information
at the specified offset offset. In case of an error, it
returns DW_DLV_ERROR and sets the argument
err.
Dwarf_Debug dbg;
Dwarf_Unsigned offset;
Dwarf_Signed cnt;
Dwarf_Macro_Details *md;
Dwarf_Error de;
offset = 0;
while (dwarf_get_macro_details(dbg, offset, 0,
&cnt, &md, &de) == DW_DLV_OK) {
for (i = 0; i < cnt; i++) {
/* Access fields of md[i] ... */
}
offset = md[cnt - 1].dmd_offset + 1;
}
dwarf_get_macro_details() can fail with:
DW_DLE_ARGUMENT]NULL.DW_DLE_NO_ENTRY]| March 20, 2011 | NetBSD 10.0 |