Function report |
Source Code:kernel\trace\trace_probe.c |
Create Date:2022-07-28 12:43:06 |
| Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
| home page | Tree |
| Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:String length checking wrapper
Proto:static int traceprobe_parse_probe_arg_body(char *arg, ssize_t *size, struct probe_arg *parg, unsigned int flags, int offset)
Type:int
Parameter:
| Type | Parameter | Name |
|---|---|---|
| char * | arg | |
| ssize_t * | size | |
| struct probe_arg * | parg | |
| unsigned int | flags | |
| int | offset |
| 546 | struct fetch_insn * code, * scode, * tmp = NULL |
| 551 | If len > MAX_ARGSTR_LEN Then |
| 553 | Return -EINVAL |
| 554 | Else if len == 0 Then |
| 556 | Return -EINVAL |
| 559 | Command of this argument = kstrdup(arg, GFP_KERNEL) |
| 560 | If Not Command of this argument Then Return -ENOMEM |
| 563 | t = strchr - Find the first occurrence of the character c in the string s.*@s: the string to be searched*@c: the character to search for |
| 564 | If t Then |
| 565 | t = '\0' |
| 566 | t2 = strchr - Find the first occurrence of the character c in the string s.*@s: the string to be searched*@c: the character to search for |
| 567 | If t2 Then |
| 568 | t2++ = '\0' |
| 569 | t3 = strchr - Find the first occurrence of the character c in the string s.*@s: the string to be searched*@c: the character to search for |
| 570 | If Not t3 Then |
| 574 | Return -EINVAL |
| 575 | Else if t3[1] != '\0' Then |
| 576 | trace_probe_log_err(offset + t3 + 1 - arg, BAD_ARRAY_SUFFIX) |
| 578 | Return -EINVAL |
| 580 | t3 = '\0' |
| 582 | trace_probe_log_err(offset + t2 - arg, BAD_ARRAY_NUM) |
| 584 | Return -EINVAL |
| 586 | If Array count > MAX_ARRAY_LEN Then |
| 587 | trace_probe_log_err(offset + t2 - arg, ARRAY_TOO_BIG) |
| 589 | Return -EINVAL |
| 600 | If Array count || t && strcmp(t, "string") Then Return -EINVAL |
| 602 | Type of this argument = find_fetch_type("string") |
| 603 | Else Type of this argument = find_fetch_type(t) |
| 605 | If Not Type of this argument Then |
| 610 | size += Byte size of type * If Array count Else 1 |
| 612 | If Array count Then |
| 615 | If Not Format string if needed Then Return -ENOMEM |
| 621 | code = tmp = kcalloc - allocate memory for an array. The memory is set to zero.*@n: number of elements.*@size: element size.*@flags: the type of memory to allocate (see kmalloc). |
| 624 | op = FETCH_OP_END |
| 626 | ret = Recursive argument parser |
| 632 | If Not strcmp(Name of type , "string") || Not strcmp(Name of type , "ustring") Then |
| 634 | If op != Dereference: .offset && op != User-space Dereference: .offset && op != Immediate : .immediate && op != Current comm && op != Allocated data: .data Then |
| 642 | If op == Immediate : .immediate || op == Current comm || Array count Then |
| 650 | code++ |
| 651 | If op != FETCH_OP_NOP Then |
| 658 | If Not strcmp(Name of type , "ustring") || op == User-space Dereference: .offset Then op = User String: .offset, .size |
| 661 | Else op = String: .offset, .size |
| 663 | size = Byte size of type |
| 664 | Dynamic array (string) is used = true |
| 665 | Else if op == Dereference: .offset Then |
| 666 | op = Mem: .offset, .size |
| 667 | size = Byte size of type |
| 668 | Else if op == User-space Dereference: .offset Then |
| 669 | op = Mem: .offset, .size |
| 670 | size = Byte size of type |
| 671 | Else |
| 683 | If (t != NULL) Then |
| 685 | If ret Then |
| 686 | trace_probe_log_err(offset + t - arg, BAD_BITFIELD) |
| 687 | Go to fail |
| 691 | If Array count Then |
| 692 | If op != Mem: .offset, .size && op != String: .offset, .size && op != User String: .offset, .size Then |
| 700 | code++ |
| 701 | If op != FETCH_OP_NOP Then |
| 706 | op = Array: .param = loop count |
| 707 | param = Array count |
| 709 | code++ |
| 710 | op = FETCH_OP_END |
| 713 | code = kcalloc - allocate memory for an array. The memory is set to zero.*@n: number of elements.*@size: element size.*@flags: the type of memory to allocate (see kmalloc). |
| 719 | fail : |
| 720 | If ret Then |
| 721 | When code < tmp + ch + deref*N + store + mod + end <= 16, this allows N=12, enough cycle If op == Unresolved Symbol holder || op == Allocated data: .data Then |
| 728 | Return ret |
| Name | Describe |
|---|---|
| traceprobe_parse_probe_arg |
| Source code conversion tool public plug-in interface | X |
|---|---|
| Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion |