truss: fix uninitialized trussinfo->curthread in add_threads()/enter_syscall
trussinfo->curthread must be initialized before calling enter_syscall(), it is used by t->proc->abi->fetch_args(). Without that truss is segfaulting and the attached program also crash. Submitted by: Nikita Kozlov (nikita@gandi.net) Reviewed by: jhb MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D7399
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=303685
@ -223,8 +223,10 @@ add_threads(struct trussinfo *info, struct procinfo *p)
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t = new_thread(p, lwps[i]);
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if (ptrace(PT_LWPINFO, lwps[i], (caddr_t)&pl, sizeof(pl)) == -1)
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err(1, "ptrace(PT_LWPINFO)");
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if (pl.pl_flags & PL_FLAG_SCE)
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if (pl.pl_flags & PL_FLAG_SCE) {
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info->curthread = t;
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enter_syscall(info, t, &pl);
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}
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}
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free(lwps);
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}
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