d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Change namei and syscall ktrace events to malloc work buffers before

Browse Source 
obtaining a ktr_request structure from the free pool so we can avoid
starving other threads of ktr_request structures.
This commit is contained in:
John Baldwin 2002-09-11 20:46:50 +00:00
parent bf7eacb62f
commit 4b3aac3d4e
1 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
sys/kern/kern_ktrace.c
View File

@ -330,18 +330,22 @@ ktrsyscall(code, narg, args)
struct ktr_request *req;
struct ktr_syscall *ktp;
size_t buflen;
char *buf = NULL;
buflen = sizeof(register_t) * narg;
if (buflen > 0) {
buf = malloc(buflen, M_KTRACE, M_WAITOK);
bcopy(args, buf, buflen);
}
req = ktr_getrequest(KTR_SYSCALL);
if (req == NULL)
return;
ktp = &req->ktr_data.ktr_syscall;
ktp->ktr_code = code;
ktp->ktr_narg = narg;
buflen = sizeof(register_t) * narg;
if (buflen > 0) {
req->ktr_header.ktr_buffer = malloc(buflen, M_KTRACE, M_WAITOK);
bcopy(args, req->ktr_header.ktr_buffer, buflen);
req->ktr_header.ktr_len = buflen;
req->ktr_header.ktr_buffer = buf;
}
ktr_submitrequest(req);
}
@ -373,16 +377,19 @@ ktrnamei(path)
{
struct ktr_request *req;
int namelen;
char *buf = NULL;
namelen = strlen(path);
if (namelen > 0) {
buf = malloc(namelen, M_KTRACE, M_WAITOK);
bcopy(path, buf, namelen);
}
req = ktr_getrequest(KTR_NAMEI);
if (req == NULL)
return;
namelen = strlen(path);
if (namelen > 0) {
req->ktr_header.ktr_len = namelen;
req->ktr_header.ktr_buffer = malloc(namelen, M_KTRACE,
M_WAITOK);
bcopy(path, req->ktr_header.ktr_buffer, namelen);
req->ktr_header.ktr_buffer = buf;
}
ktr_submitrequest(req);
}