函数逻辑报告 |
Source Code:kernel\trace\trace_probe.c |
Create Date:2022-07-27 13:54:19 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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函数名称:String length checking wrapper
函数原型:static int traceprobe_parse_probe_arg_body(char *arg, ssize_t *size, struct probe_arg *parg, unsigned int flags, int offset)
返回类型:int
参数:
类型 | 参数 | 名称 |
---|---|---|
char * | arg | |
ssize_t * | size | |
struct probe_arg * | parg | |
unsigned int | flags | |
int | offset |
546 | struct fetch_insn * code, * scode, * tmp = NULL |
551 | 如果len大于MAX_ARGSTR_LEN则 |
553 | 返回:负EINVAL |
554 | 否则如果len恒等于0则 |
556 | 返回:负EINVAL |
559 | Command of this argument 等于kstrdup(arg, GFP_KERNEL) |
560 | 如果非 Command of this argument 则返回:负ENOMEM |
563 | t等于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 | 如果t则 |
565 | t等于'\0' |
566 | t2等于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 | 如果t2则 |
568 | t2自加等于'\0' |
569 | t3等于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 | 如果非t3则 |
574 | 返回:负EINVAL |
575 | 否则如果t3[1]不等于'\0'则 |
576 | trace_probe_log_err(offset + t3 + 1 - arg, BAD_ARRAY_SUFFIX) |
578 | 返回:负EINVAL |
580 | t3等于'\0' |
582 | trace_probe_log_err(offset + t2 - arg, BAD_ARRAY_NUM) |
584 | 返回:负EINVAL |
586 | 如果 Array count 大于MAX_ARRAY_LEN则 |
587 | trace_probe_log_err(offset + t2 - arg, ARRAY_TOO_BIG) |
589 | 返回:负EINVAL |
600 | 如果 Array count 或t且字符串比较则返回:负EINVAL |
602 | Type of this argument 等于find_fetch_type("string") |
603 | 否则 Type of this argument 等于find_fetch_type(t) |
605 | 如果非 Type of this argument 则 |
610 | size加等于Byte size of type 乘如果 Array count 否则1 |
612 | 如果 Array count 则 |
614 | Format string if needed 等于开辟内存 |
615 | 如果非 Format string if needed 则返回:负ENOMEM |
624 | op等于FETCH_OP_END |
634 | 如果op不等于 Dereference: .offset 且op不等于 User-space Dereference: .offset 且op不等于 Immediate : .immediate 且op不等于 Current comm 且op不等于 Allocated data: .data 则 |
642 | 如果op恒等于 Immediate : .immediate 或op恒等于 Current comm 或 Array count 则 |
650 | code自加 |
651 | 如果op不等于FETCH_OP_NOP则 |
658 | 如果非字符串比较或op恒等于 User-space Dereference: .offset 则op等于 User String: .offset, .size |
661 | 否则op等于 String: .offset, .size |
663 | size等于Byte size of type |
664 | Dynamic array (string) is used = true |
665 | 否则如果op恒等于 Dereference: .offset 则 |
666 | op等于 Mem: .offset, .size |
667 | size等于Byte size of type |
668 | 否则如果op恒等于 User-space Dereference: .offset 则 |
669 | op等于 Mem: .offset, .size |
670 | size等于Byte size of type |
671 | 否则 |
683 | 如果(t != NULL)则 |
685 | 如果ret则 |
686 | trace_probe_log_err(offset + t - arg, BAD_BITFIELD) |
687 | 转到:fail |
691 | 如果 Array count 则 |
692 | 如果op不等于 Mem: .offset, .size 且op不等于 String: .offset, .size 且op不等于 User String: .offset, .size 则 |
700 | code自加 |
701 | 如果op不等于FETCH_OP_NOP则 |
706 | op等于 Array: .param = loop count |
707 | param等于 Array count |
709 | code自加 |
710 | op等于FETCH_OP_END |
719 | fail : |
720 | 如果ret则 |
728 | 返回:ret |
名称 | 描述 |
---|---|
traceprobe_parse_probe_arg |
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