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dwarf_lineaddr(3) [freebsd man page]

DWARF_LINENO(3) 					   BSD Library Functions Manual 					   DWARF_LINENO(3)

NAME
dwarf_lineaddr, dwarf_linebeginstatement, dwarf_lineblock, dwarf_lineendsequence, dwarf_lineno, dwarf_lineoff, dwarf_linesrc, dwarf_line_srcfileno -- retrieve information associated with a DWARF line descriptor LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_lineaddr(Dwarf_Line ln, Dwarf_Addr *ret, Dwarf_Error *err); int dwarf_linebeginstatement(Dwarf_Line ln, Dwarf_Bool *ret, Dwarf_Error *err); int dwarf_lineblock(Dwarf_Line ln, Dwarf_Bool *ret, Dwarf_Error *err); int dwarf_lineendsequence(Dwarf_Line ln, Dwarf_Bool *ret, Dwarf_Error *err); int dwarf_lineno(Dwarf_Line ln, Dwarf_Unsigned *ret, Dwarf_Error *err); int dwarf_lineoff(Dwarf_Line ln, Dwarf_Signed *ret, Dwarf_Error *err); int dwarf_linesrc(Dwarf_Line ln, char **ret, Dwarf_Error *err); int dwarf_line_srcfileno(Dwarf_Line ln, Dwarf_Unsigned *ret, Dwarf_Error *err); DESCRIPTION
These functions retrieve specific line information associated with the line descriptor specified by argument ln, and stores it in the loca- tion pointed to by argument ret. If argument err is not NULL, it will be used to store error information in case of an error. Function dwarf_lineaddr() stores the program address corresponding to the source line specified in argument ln into the location pointed to by argument ret. Function dwarf_linebeginstatement() sets the location pointed to by argument ret to 1 if the source line specified by the line descriptor ln is the beginning of a statement, or to 0 otherwise. Function dwarf_lineblock() sets the location pointed to by argument ret to 1 if the source line specified by the line descriptor ln is the beginning of a basic block, or to 0 otherwise. Function dwarf_lineendsequence() sets the location pointed to by argument ret to 1 if the program address associated with the line descriptor ln is the address immediately following the end of a sequence of target machine instructions, or to 0 otherwise. Function dwarf_lineno() stores the line number of the source line associated with the line descriptor ln into the location pointed to by argument ret. Function dwarf_lineoff() stores the column number within a line associated with descriptor ln into the location pointed to by argument ret. The retrieved column numbers are 1-based, with the value -1 indicating that column number information was not available. Function dwarf_linesrc() stores a pointer to a NUL-terminated string containing the source file name associated with line descriptor ln into the location pointed to by argument ret. The full path of the source file is returned if possible. The memory used for the source file name string is managed by the DWARF(3) library and should not be directly freed by application code. Instead, portable code should use dwarf_dealloc(3) to indicate that the string should be freed. Function dwarf_line_srcfileno() stores the index of the source file associated with the line descriptor ln in the location pointed to by argument ret. The returned value is 1-based index into the array of source file names returned by dwarf_srcfiles(3). RETURN VALUES
On success, these functions returns DW_DLV_OK. In case of an error, they return DW_DLV_ERROR and set the argument err. ERRORS
These functions may fail with the following errors: [DW_DLE_ARGUMENT] Either of the arguments ln or ret was NULL. [DW_DLE_LINE_FILE_NUM_BAD] The source file name associated with the line descriptor ln could not be retrieved by function dwarf_linesrc(). SEE ALSO
dwarf(3), dwarf_dealloc(3), dwarf_srcfiles(3), dwarf_srclines(3) BSD
February 5, 2011 BSD

Check Out this Related Man Page

DWARF_ATTRVAL_SIGNED(3) 				   BSD Library Functions Manual 				   DWARF_ATTRVAL_SIGNED(3)

NAME
dwarf_attrval_flag, dwarf_attrval_signed, dwarf_attrval_string, dwarf_attrval_unsigned -- retrieve the value of an attribute within a DWARF debugging information entry LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_attrval_flag(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret, Dwarf_Error *err); int dwarf_attrval_signed(Dwarf_Die die, Dwarf_Half attr, Dwarf_Signed *ret, Dwarf_Error *err); int dwarf_attrval_string(Dwarf_Die die, Dwarf_Half attr, const char **ret, Dwarf_Error *err); int dwarf_attrval_unsigned(Dwarf_Die die, Dwarf_Half attr, Dwarf_Unsigned *ret, Dwarf_Error *err); DESCRIPTION
These functions search the debugging information entry referenced by argument die for the attribute named by argument attr. If the named attribute is found, the functions set the location pointed to by argument ret to the value of the attribute. The argument err, if non NULL, will be used to return an error descriptor in case of an error. Function dwarf_attrval_flag() sets the location pointed to by argument ret to either 0 or 1. If the form of the attribute named by argument attr is DW_FORM_flag, function dwarf_attrval_flag() sets the location pointed to by argument ret to 1 if the attribute has a non-zero value, or to 0 otherwise. If the form of the attribute named by argument attr is DW_FORM_flag_present, function dwarf_attrval_flag() uncondition- ally sets the location pointed to by argument ret to 1. The form of the attribute must be one of DW_FORM_flag or DW_FORM_flag_present. Function dwarf_attrval_signed() stores the value for the attribute named by argument attr, into the location pointed to by argument ret. The attribute's value is treated as a signed integral quantity and is sign-extended as needed. The attribute named by the argument attr must belong to the CONSTANT class and must have one of the following forms: DW_FORM_data1, DW_FORM_data2, DW_FORM_data4, DW_FORM_data8 or DW_FORM_sdata. Function dwarf_attrval_string() sets the location pointed to by argument ret to a pointer to a NUL-terminated string that is the value of the attribute named by argument attr. The form of the attribute must be one of DW_FORM_string or DW_FORM_strp. Function dwarf_attrval_unsigned() stores the value for the attribute named by argument attr into the location pointed to by argument ret. The attribute's value is treated as an unsigned integral quantity, and is zero-extended as needed. The named attribute must belong to one of the CONSTANT, ADDRESS or REFERENCE classes and must have one of the following forms: DW_FORM_addr, DW_FORM_data1, DW_FORM_data2, DW_FORM_data4, DW_FORM_data8, DW_FORM_udata, DW_FORM_ref1, DW_FORM_ref2, DW_FORM_ref4, DW_FORM_ref8, or DW_FORM_ref_udata. If the attribute named by argument attr is not present in the debugging information entry referenced by argument die, and if a DW_AT_abstract_origin attribute is present in the debugging information entry, function dwarf_attrval_unsigned() will search for the named attribute in the debugging information entry referenced by the DW_AT_abstract_origin attribute. RETURN VALUES
On success, these functions returns DW_DLV_OK. If the named attribute was not found in the specified debugging information entry descriptor these functions return DW_DLV_NO_ENTRY and set argument err. For other errors, these functions return DW_DLV_ERROR and set argument err. COMPATIBILITY
These functions are extensions added by this implementation of the DWARF(3) API. ERRORS
These functions may fail with the following errors: [DW_DLE_ARGUMENT] Either of the arguments die or ret was NULL. [DW_DLE_NO_ENTRY] Argument die did not contain an attribute corresponding to the value in argument attr. [DW_DLE_ATTR_FORM_BAD] The attribute named by argument attr was not of a permitted form. SEE ALSO
dwarf(3), dwarf_attr(3), dwarf_hasattr(3) BSD
January 18, 2014 BSD
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