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uti: identify UTI thread by thread local variable

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Change-Id: I64372a932378e4ead09ea27fbf5b52062a109756
This commit is contained in:
Masamichi Takagi
2021-02-02 10:47:45 +09:00
parent a9973e913d
commit 5d16ce9dcc
1 changed files with 15 additions and 5 deletions
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18
executer/user/syscall_intercept.c
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@ -1,3 +1,4 @@
#define _GNU_SOURCE
#include <libsyscall_intercept_hook_point.h> #include <libsyscall_intercept_hook_point.h>
#include <errno.h> #include <errno.h>
#include <stdio.h> #include <stdio.h>
@ -10,9 +11,11 @@
#include "../include/uti.h" #include "../include/uti.h"
#include "./archdep_uti.h" #include "./archdep_uti.h"
#define DEBUG_UTI
static struct uti_desc uti_desc; static struct uti_desc uti_desc;
#define DEBUG_UTI static __thread int on_linux = -1;
static int static int
hook(long syscall_number, hook(long syscall_number,
@ -21,8 +24,6 @@ hook(long syscall_number,
long arg4, long arg5, long arg4, long arg5,
long *result) long *result)
{ {
//return 1; /* debug */
int tid = uti_syscall0(__NR_gettid);
struct terminate_thread_desc term_desc; struct terminate_thread_desc term_desc;
unsigned long code; unsigned long code;
int stack_top; int stack_top;
@ -31,12 +32,21 @@ hook(long syscall_number,
if (!uti_desc.start_syscall_intercept) { if (!uti_desc.start_syscall_intercept) {
return 1; /* System call isn't taken over */ return 1; /* System call isn't taken over */
} }
if (tid != uti_desc.mck_tid) {
/* new thread */
if (on_linux == -1) {
int tid = uti_syscall0(__NR_gettid);
on_linux = (tid == uti_desc.mck_tid) ? 1 : 0;
}
if (on_linux == 0) {
if (uti_desc.syscalls2 && syscall_number >= 0 && syscall_number < 512) { if (uti_desc.syscalls2 && syscall_number >= 0 && syscall_number < 512) {
uti_desc.syscalls2[syscall_number]++; uti_desc.syscalls2[syscall_number]++;
} }
return 1; return 1;
} }
#ifdef DEBUG_UTI #ifdef DEBUG_UTI
if (uti_desc.syscalls && syscall_number >= 0 && syscall_number < 512) { if (uti_desc.syscalls && syscall_number >= 0 && syscall_number < 512) {
uti_desc.syscalls[syscall_number]++; uti_desc.syscalls[syscall_number]++;