HP-UX Reference (11i v3 07/02) - 3 Library Functions N-Z (vol 7)

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uwx(3X) uwx(3X)

(Integrity Systems Only)

[UWX_ERR_LOOKUPERR] The "Lookup IP" callback encountered an error.

[UWX_ERR_NOCALLBACKS] No callback routines have been registered.

[UWX_ERR_NOCONTEXT] No initial context has been supplied.

[UWX_ERR_NOENV] The env parameter is NULL.

[UWX_ERR_NOMEM] An attempt to allocate additional memory failed.

[UWX_ERR_NOSYM] No symbolic information was found.

[UWX_ERR_NOUDESC] An unwind information block was found, but it does not describe the

current frame’s IP.

[UWX_ERR_NOUENTRY] No unwind information block was found for the current frame’s IP.

[UWX_ERR_PROLOG_UF] The unwind information block is invalid -- the nesting of prologue

regions is not balanced.

[UWX_ERR_UCACCESS] An unidentiﬁed error was received from the uc_access(3) library.

[UWX_ERR_UNDEFLABEL] The unwind information block is invalid -- an undeﬁned label is refer-

enced.

EXAMPLES

The following code fragment performs a stack unwind in the current thread:

int status;

struct uwx_env *env;

struct uwx_self_info *info;

uint64_t ip;

env = uwx_init();

info = uwx_self_init_info(env);

status = uwx_register_callbacks(env, (intptr_t)info,

uwx_self_copyin, uwx_self_lookupip);

status = uwx_self_init_context(env);

for (;;) {

status = uwx_step(env);

if (status != UWX_OK)

break;

status = uwx_get_reg(env, UWX_REG_IP, &ip);

printf("IP: %016llx\n", ip);

}

uwx_self_free_info(info);

uwx_free(env);

LIMITATIONS

The Unwind Express Library currently does not recognize X-format unwind descriptors. These are not

currently used by HP compilers.

AUTHOR

The Unwind Express Library was developed by Hewlett-Packard.