C++ (Cpp) is_c_varname Examples

Example #1

File: probe-finder.c Project: MiniBlu/cm11_kernel_htc_msm8974a3ul

static int find_variable(Dwarf_Die *sc_die, struct probe_finder *pf)
{
	Dwarf_Die vr_die;
	char buf[32], *ptr;
	int ret = 0;

	if (!is_c_varname(pf->pvar->var)) {
		
		pf->tvar->value = strdup(pf->pvar->var);
		if (pf->tvar->value == NULL)
			return -ENOMEM;
		if (pf->pvar->type) {
			pf->tvar->type = strdup(pf->pvar->type);
			if (pf->tvar->type == NULL)
				return -ENOMEM;
		}
		if (pf->pvar->name) {
			pf->tvar->name = strdup(pf->pvar->name);
			if (pf->tvar->name == NULL)
				return -ENOMEM;
		} else
			pf->tvar->name = NULL;
		return 0;
	}

	if (pf->pvar->name)
		pf->tvar->name = strdup(pf->pvar->name);
	else {
		ret = synthesize_perf_probe_arg(pf->pvar, buf, 32);
		if (ret < 0)
			return ret;
		ptr = strchr(buf, ':');	
		if (ptr)
			*ptr = '_';
		pf->tvar->name = strdup(buf);
	}
	if (pf->tvar->name == NULL)
		return -ENOMEM;

	pr_debug("Searching '%s' variable in context.\n", pf->pvar->var);
	
	if (!die_find_variable_at(sc_die, pf->pvar->var, pf->addr, &vr_die)) {
		
		if (!die_find_variable_at(&pf->cu_die, pf->pvar->var, 0, &vr_die))
			ret = -ENOENT;
	}
	if (ret >= 0)
		ret = convert_variable(&vr_die, pf);

	if (ret < 0)
		pr_warning("Failed to find '%s' in this function.\n",
			   pf->pvar->var);
	return ret;
}

Example #2

/* Find a variable in a subprogram die */
static int find_variable(Dwarf_Die *sp_die, struct probe_finder *pf)
{
	Dwarf_Die vr_die;
	char buf[32], *ptr;
	int ret;

	/* TODO: Support arrays */
	if (pf->pvar->name)
		pf->tvar->name = strdup(pf->pvar->name);
	else {
		ret = synthesize_perf_probe_arg(pf->pvar, buf, 32);
		if (ret < 0)
			return ret;
		ptr = strchr(buf, ':');	/* Change type separator to _ */
		if (ptr)
			*ptr = '_';
		pf->tvar->name = strdup(buf);
	}
	if (pf->tvar->name == NULL)
		return -ENOMEM;

	if (!is_c_varname(pf->pvar->var)) {
		/* Copy raw parameters */
		pf->tvar->value = strdup(pf->pvar->var);
		if (pf->tvar->value == NULL)
			return -ENOMEM;
		else
			return 0;
	}

	pr_debug("Searching '%s' variable in context.\n",
		 pf->pvar->var);
	/* Search child die for local variables and parameters. */
	if (!die_find_variable(sp_die, pf->pvar->var, &vr_die)) {
		pr_warning("Failed to find '%s' in this function.\n",
			   pf->pvar->var);
		return -ENOENT;
	}
	return convert_variable(&vr_die, pf);
}

Example #3

File: probe-event.c Project: KaZoom/buildroot-linux-kernel-m3

/* Parse perf-probe event definition */
void parse_perf_probe_event(const char *str, struct probe_point *pp,
			    bool *need_dwarf)
{
	char **argv;
	int argc, i;

	*need_dwarf = false;

	argv = argv_split(str, &argc);
	if (!argv)
		die("argv_split failed.");
	if (argc > MAX_PROBE_ARGS + 1)
		semantic_error("Too many arguments");

	/* Parse probe point */
	parse_perf_probe_probepoint(argv[0], pp);
	if (pp->file || pp->line || pp->lazy_line)
		*need_dwarf = true;

	/* Copy arguments and ensure return probe has no C argument */
	pp->nr_args = argc - 1;
	pp->args = zalloc(sizeof(char *) * pp->nr_args);
	for (i = 0; i < pp->nr_args; i++) {
		pp->args[i] = strdup(argv[i + 1]);
		if (!pp->args[i])
			die("Failed to copy argument.");
		if (is_c_varname(pp->args[i])) {
			if (pp->retprobe)
				semantic_error("You can't specify local"
						" variable for kretprobe");
			*need_dwarf = true;
		}
	}

	argv_free(argv);
}

Example #4

File: probe-finder.c Project: LittleForker/linux-2.6

/* Find a variable in a subprogram die */
static int find_variable(Dwarf_Die *sp_die, struct probe_finder *pf)
{
	Dwarf_Die vr_die, *scopes;
	char buf[32], *ptr;
	int ret, nscopes;

	if (!is_c_varname(pf->pvar->var)) {
		/* Copy raw parameters */
		pf->tvar->value = strdup(pf->pvar->var);
		if (pf->tvar->value == NULL)
			return -ENOMEM;
		if (pf->pvar->type) {
			pf->tvar->type = strdup(pf->pvar->type);
			if (pf->tvar->type == NULL)
				return -ENOMEM;
		}
		if (pf->pvar->name) {
			pf->tvar->name = strdup(pf->pvar->name);
			if (pf->tvar->name == NULL)
				return -ENOMEM;
		} else
			pf->tvar->name = NULL;
		return 0;
	}

	if (pf->pvar->name)
		pf->tvar->name = strdup(pf->pvar->name);
	else {
		ret = synthesize_perf_probe_arg(pf->pvar, buf, 32);
		if (ret < 0)
			return ret;
		ptr = strchr(buf, ':');	/* Change type separator to _ */
		if (ptr)
			*ptr = '_';
		pf->tvar->name = strdup(buf);
	}
	if (pf->tvar->name == NULL)
		return -ENOMEM;

	pr_debug("Searching '%s' variable in context.\n",
		 pf->pvar->var);
	/* Search child die for local variables and parameters. */
	if (die_find_variable_at(sp_die, pf->pvar->var, pf->addr, &vr_die))
		ret = convert_variable(&vr_die, pf);
	else {
		/* Search upper class */
		nscopes = dwarf_getscopes_die(sp_die, &scopes);
		while (nscopes-- > 1) {
			pr_debug("Searching variables in %s\n",
				 dwarf_diename(&scopes[nscopes]));
			/* We should check this scope, so give dummy address */
			if (die_find_variable_at(&scopes[nscopes],
						 pf->pvar->var, 0,
						 &vr_die)) {
				ret = convert_variable(&vr_die, pf);
				goto found;
			}
		}
		if (scopes)
			free(scopes);
		ret = -ENOENT;
	}
found:
	if (ret < 0)
		pr_warning("Failed to find '%s' in this function.\n",
			   pf->pvar->var);
	return ret;
}