NAME
uwx_get_source_info() — return source information for current frame
SYNOPSIS
#include <uwx.h>
int uwx_get_source_info(
struct uwx_env *env,
char **ifuncp,
char **srcfilep,
int *linenump,
int *inline_contextp
);
DESCRIPTION
uwx_get_source_info()
is part of the Unwind Express Library for Integrity systems; see
uwx(3X).
uwx_get_source_info()
obtains source file and line number information for the current frame from
the symbolic information stored in the ELF object file,
if available.
This entry point is provided for use immediately following a call to
uwx_step()
or
uwx_step_inline().
For other situations, see
uwx_find_source_info(3X).
Parameters
- env
A pointer to an unwind environment object.
- ifuncp
Pointer to a variable of type
char *
where the inlined function name will be returned.
If NULL,
the inlined function name will not be returned.
If the IP (instruction pointer) of the current context is not in an inlined call
or if symbolic debug information is not available,
a NULL
pointer will be returned.
- srcfilep
Pointer to a variable of type
char *
where the source file name will be returned.
If NULL,
the source file name will not be returned.
If symbolic debug information is not available,
a NULL
pointer will be returned.
- linenump
Pointer to a variable of type
int
where the source line number will be returned.
If NULL,
the source line number will not be returned.
If symbolic debug information is not available,
0 will be returned.
- inline_contextp
Pointer to a variable of type
int
where the
inline context
identifier will be returned.
If NULL,
the
inline context
identifier will not be returned.
If the IP of the current context is not in an inlined call
or if symbolic debug information is not available,
0 will be returned.
In all cases where a pointer to a string is returned,
the string is allocated within the unwind environment,
and the pointer is valid only until the next call to either
uwx_step()
or
uwx_free().
Stepping through inlined calls
If
uwx_get_source_info()
returns a non-zero
inline context
identifier, it indicates that the IP is located within an inline call.
If the application wishes to step through the chain of inlined calls, it can
find the name of the inlined function through the
ifuncp
pointer, then call
uwx_step_inline()
to move one step up the chain of inlined calls.
The application may then call
uwx_get_source_info()
again to obtain the updated information.
This process should be repeated until the returned identifier is 0.
RETURN VALUE
uwx_get_source_info()
returns
UWX_OK
on success.
See
uwx(3X)
for error codes.
AUTHOR
The Unwind Express Library was developed by Hewlett-Packard.
SEE ALSO
uwx(3X),
uwx_add_to_bsp(3X),
uwx_find_source_info(3X),
uwx_find_symbol(3X),
uwx_free(3X),
uwx_get_abi_context_code(3X),
uwx_get_funcstart(3X),
uwx_get_module_info(3X),
uwx_get_nat(3X),
uwx_get_reg(3X),
uwx_get_sym_info(3X),
uwx_init(3X),
uwx_init_context(3X),
uwx_register_alloc_cb(3X),
uwx_register_callbacks(3X),
uwx_release_symbol_cache(3X),
uwx_self_do_context_frame(3X),
uwx_self_free_info(3X),
uwx_self_init_context(3X),
uwx_self_init_info(3X),
uwx_set_nofr(3X),
uwx_set_remote(3X),
uwx_step(3X),
uwx_step_inline(3X).
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