libdwarf
Using dwarf_init_path()

Example of a libdwarf initialization call.

An example calling dwarf_init_path() and dwarf_finish()

Parameters
pathPath to an object we wish to open.
groupnumberDesired groupnumber. Use DW_DW_GROUPNUMBER_ANY unless you have reason to do otherwise.
Returns
Returns the applicable result. DW_DLV_OK etc.
*/
int exampleinit(const char *path, unsigned groupnumber)
{
static char true_pathbuf[FILENAME_MAX];
unsigned tpathlen = FILENAME_MAX;
Dwarf_Handler errhand = 0;
Dwarf_Ptr errarg = 0;
Dwarf_Error error = 0;
Dwarf_Debug dbg = 0;
int res = 0;
res = dwarf_init_path(path,true_pathbuf,
tpathlen,groupnumber,errhand,
errarg,&dbg, &error);
if (res == DW_DLV_ERROR) {
/* Necessary call even though dbg is null!
This avoids a memory leak. */
dwarf_dealloc_error(dbg,error);
return res;
}
if (res == DW_DLV_NO_ENTRY) {
/* Nothing we can do */
return res;
}
printf("The file we actually opened is %s\n",
true_pathbuf);
/* Call libdwarf functions here */
return DW_DLV_OK;
}
struct Dwarf_Debug_s * Dwarf_Debug
Definition: libdwarf.h:586
struct Dwarf_Error_s * Dwarf_Error
Definition: libdwarf.h:580
void(* Dwarf_Handler)(Dwarf_Error dw_error, Dwarf_Ptr dw_errarg)
Definition: libdwarf.h:701
void * Dwarf_Ptr
Definition: libdwarf.h:208
void dwarf_dealloc_error(Dwarf_Debug dw_dbg, Dwarf_Error dw_error)
Free (dealloc) an Dwarf_Error something created.
int dwarf_init_path(const char *dw_path, char *dw_true_path_out_buffer, unsigned int dw_true_path_bufferlen, unsigned int dw_groupnumber, Dwarf_Handler dw_errhand, Dwarf_Ptr dw_errarg, Dwarf_Debug *dw_dbg, Dwarf_Error *dw_error)
Initialization based on path, the most common initialization.
int dwarf_finish(Dwarf_Debug dw_dbg)
Close the initialized dw_dbg and free all data libdwarf has for this dw_dbg.