trace_probe.c (f8bade6c9a6213c2c5ba6e5bf32415ecab6e41e5) trace_probe.c (f2cc020d7876de7583feb52ec939a32419cf9468)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Common code for probe-based Dynamic events.
4 *
5 * This code was copied from kernel/trace/trace_kprobe.c written by
6 * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
7 *
8 * Updates to make this generic:

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163void __trace_probe_log_err(int offset, int err_type)
164{
165 char *command, *p;
166 int i, len = 0, pos = 0;
167
168 if (!trace_probe_log.argv)
169 return;
170
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Common code for probe-based Dynamic events.
4 *
5 * This code was copied from kernel/trace/trace_kprobe.c written by
6 * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
7 *
8 * Updates to make this generic:

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163void __trace_probe_log_err(int offset, int err_type)
164{
165 char *command, *p;
166 int i, len = 0, pos = 0;
167
168 if (!trace_probe_log.argv)
169 return;
170
171 /* Recalcurate the length and allocate buffer */
171 /* Recalculate the length and allocate buffer */
172 for (i = 0; i < trace_probe_log.argc; i++) {
173 if (i == trace_probe_log.index)
174 pos = len;
175 len += strlen(trace_probe_log.argv[i]) + 1;
176 }
177 command = kzalloc(len, GFP_KERNEL);
178 if (!command)
179 return;
180
181 if (trace_probe_log.index >= trace_probe_log.argc) {
182 /**
183 * Set the error position is next to the last arg + space.
184 * Note that len includes the terminal null and the cursor
172 for (i = 0; i < trace_probe_log.argc; i++) {
173 if (i == trace_probe_log.index)
174 pos = len;
175 len += strlen(trace_probe_log.argv[i]) + 1;
176 }
177 command = kzalloc(len, GFP_KERNEL);
178 if (!command)
179 return;
180
181 if (trace_probe_log.index >= trace_probe_log.argc) {
182 /**
183 * Set the error position is next to the last arg + space.
184 * Note that len includes the terminal null and the cursor
185 * appaers at pos + 1.
185 * appears at pos + 1.
186 */
187 pos = len;
188 offset = 0;
189 }
190
191 /* And make a command string from argv array */
192 p = command;
193 for (i = 0; i < trace_probe_log.argc; i++) {

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587 trace_probe_log_err(offset + t2 - arg,
588 ARRAY_TOO_BIG);
589 return -EINVAL;
590 }
591 }
592 }
593
594 /*
186 */
187 pos = len;
188 offset = 0;
189 }
190
191 /* And make a command string from argv array */
192 p = command;
193 for (i = 0; i < trace_probe_log.argc; i++) {

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587 trace_probe_log_err(offset + t2 - arg,
588 ARRAY_TOO_BIG);
589 return -EINVAL;
590 }
591 }
592 }
593
594 /*
595 * Since $comm and immediate string can not be dereferred,
595 * Since $comm and immediate string can not be dereferenced,
596 * we can find those by strcmp.
597 */
598 if (strcmp(arg, "$comm") == 0 || strncmp(arg, "\\\"", 2) == 0) {
599 /* The type of $comm must be "string", and not an array. */
600 if (parg->count || (t && strcmp(t, "string")))
601 return -EINVAL;
602 parg->type = find_fetch_type("string");
603 } else

--- 550 unchanged lines hidden --- 		596 * we can find those by strcmp.
597 */
598 if (strcmp(arg, "$comm") == 0 || strncmp(arg, "\\\"", 2) == 0) {
599 /* The type of $comm must be "string", and not an array. */
600 if (parg->count || (t && strcmp(t, "string")))
601 return -EINVAL;
602 parg->type = find_fetch_type("string");
603 } else

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