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uti: Create tracer when forking

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Change-Id: Ic66cf6289ac6f32a884ba1266e641ce61620a239
This commit is contained in:
Masamichi Takagi
2018-09-02 11:49:02 +09:00
parent 439dc0928b
commit 35300e7b4f
1 changed files with 31 additions and 30 deletions
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61
executer/user/mcexec.c
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@@ -2145,26 +2145,8 @@ int main(int argc, char **argv)
if (opendev() == -1)
exit(EXIT_FAILURE);
/* Perform mmap() before fork() in create_tracer() */
uti_wp = mmap(NULL, PAGE_SIZE * 3, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
if (uti_wp == (void *)-1) {
exit(1);
}
uti_desc = mmap(NULL, sizeof(struct uti_desc), PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
if (uti_desc == (void *)-1) {
exit(1);
}
memset(uti_desc, 0, sizeof(struct uti_desc));
sem_init(&uti_desc->arg, 1, 0);
sem_init(&uti_desc->attach, 1, 0);
#if 1
/* Create tracer before any proxy VMAs are attached */
if ((error = pipe(uti_pfd)) == -1) {
fprintf(stderr, "%s: pipe returned %d\n", __FUNCTION__, error);
return -1;
}
/* Create tracer before anonymous inode is mapped */
if ((error = create_tracer())) {
fprintf(stderr, "%s: create tracer returned %d\n", __FUNCTION__, error);
return error;
@@ -2906,9 +2888,28 @@ create_tracer()
unsigned long code = 0;
int exited = 0;
int mode = 0;
//struct tracer_desc desc;
unsigned long buf;
/* Perform mmap() before fork() in create_tracer() */
uti_desc = mmap(NULL, sizeof(struct uti_desc), PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
if (uti_desc == (void *)-1) {
return -1;
}
memset(uti_desc, 0, sizeof(struct uti_desc));
sem_init(&uti_desc->arg, 1, 0);
sem_init(&uti_desc->attach, 1, 0);
uti_wp = mmap(NULL, PAGE_SIZE * 3, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
if (uti_wp == (void *)-1) {
return -1;
}
if (pipe(uti_pfd)) {
fprintf(stderr, "%s: pipe failed: %s\n", __FUNCTION__, strerror(errno));
return -1;
}
tpid = fork();
if (tpid) {
if (tpid == -1)
@@ -3177,16 +3178,9 @@ util_thread(struct thread_data_s *my_thread, unsigned long uctx_pa, int remote_t
unsigned long buf;
#if 0
{
int error;
if ((error = pipe(uti_pfd)) == -1) {
fprintf(stderr, "%s: pipe returned %d\n", __FUNCTION__, error);
rc = error; goto out;
}
if ((error = create_tracer())) {
fprintf(stderr, "%s: create_tracer returned %d\n", __FUNCTION__, error);
rc = error; goto out;
}
if ((error = create_tracer())) {
fprintf(stderr, "%s: create_tracer returned %d\n", __FUNCTION__, error);
rc = error; goto out;
}
#endif
#ifdef POSTK_DEBUG_ARCH_DEP_35
@@ -3765,6 +3759,13 @@ gettid_out:
goto fork_child_sync_pipe;
}
/* Create tracer before anonymous inode is mapped */
if ((ret = create_tracer())) {
fs->status = ret;
fprintf(stderr, "%s: create tracer returned %d\n", __FUNCTION__, ret);
goto fork_child_sync_pipe;
}
if (ioctl(fd, MCEXEC_UP_CREATE_PPD) != 0) {
fs->status = -errno;
fprintf(stderr, "ERROR: creating PPD %s\n", dev);