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Revert original rqtp in after_clock_nanosleep insted of scaling rmtp #12

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Revert original rqtp in after_clock_nanosleep insted of scaling rmtp #12

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af29bbe
revert original rqtp in after_clock_nanosleep insted of scaling rmtp
bigb4ng Apr 20, 2024
1ad22d4
fix case for &rmtp == &rqtp
bigb4ng Apr 20, 2024
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19 changes: 14 additions & 5 deletions tardis.c
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Original file line number Diff line number Diff line change
Expand Up @@ -126,11 +126,20 @@ void after_time(pid_t pid, struct user_regs_struct * uregs) {
ptrace(PTRACE_SETREGS, pid, 0, uregs);
}

void after_clock_nanosleep(pid_t pid, struct user_regs_struct * uregs) {
struct timespec rmtp;
read_block(pid, &rmtp, (void *)uregs->rcx, sizeof(struct timespec));
scale_timespec(&rmtp, 1.0/delayfactor, 0);
write_block(pid, &rmtp, (void *)uregs->rcx, sizeof(struct timespec));
void after_clock_nanosleep(pid_t pid, struct user_regs_struct *uregs)
{
// revert rqtp to the original value
struct timespec rqtp, rmtp;
read_block(pid, &rqtp, (void *)uregs->rdx, sizeof(rqtp));
scale_timespec(&rqtp, delayfactor, 0);
write_block(pid, &rqtp, (void *)uregs->rdx, sizeof(rqtp));

if (uregs->r10 != 0 && uregs->r10 != uregs->rdx) {
// upscale rmtp too if it's not the same as rqtp
read_block(pid, &rmtp, (void *)uregs->r10, sizeof(rmtp));
scale_timespec(&rmtp, delayfactor, 0);
write_block(pid, &rmtp, (void *)uregs->r10, sizeof(rmtp));
}
}

int main(int argc, char *argv[], char *envp[]) {
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