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add controller command

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This commit is contained in:
5ec1cff
2023-11-12 21:00:18 +08:00
parent 040643337d
commit 0ac9bb819b
3 changed files with 22 additions and 17 deletions
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18
loader/src/ptracer/monitor.cpp
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@@ -23,11 +23,6 @@ using namespace std::string_view_literals;
#define STOPPED_WITH(sig, event) WIFSTOPPED(status) && (status >> 8 == ((sig) | (event << 8)))
enum Command {
START = 1,
STOP,
EXIT
};
enum TracingState {
TRACING = 1,
@@ -105,7 +100,6 @@ public:
};
static TracingState tracing_state = TRACING;
static bool exit_requested = false;
struct SocketHandler : public EventHandler {
int sock_fd_;
@@ -149,7 +143,6 @@ struct SocketHandler : public EventHandler {
}
switch (cmd) {
case START:
if (exit_requested) break;
if (tracing_state == STOPPING) {
tracing_state = TRACING;
} else if (tracing_state == STOPPED) {
@@ -159,7 +152,6 @@ struct SocketHandler : public EventHandler {
}
break;
case STOP:
if (exit_requested) break;
if (tracing_state == TRACING) {
LOGI("stop tracing requested");
tracing_state = STOPPING;
@@ -168,12 +160,7 @@ struct SocketHandler : public EventHandler {
break;
case EXIT:
LOGI("prepare for exit ...");
exit_requested = true;
if (tracing_state == TRACING) {
LOGI("stop tracing requested");
tracing_state = STOPPING;
ptrace(PTRACE_INTERRUPT, 1, 0, 0);
}
loop.Stop();
break;
}
}
@@ -232,7 +219,7 @@ public:
while ((pid = waitpid(-1, &status, __WALL | WNOHANG)) != 0) {
if (pid == -1) {
if (tracing_state == STOPPED && errno == ECHILD) break;
err(EXIT_FAILURE, "waitpid");
PLOGE("waitpid");
}
if (pid == 1) {
if (STOPPED_WITH(SIGTRAP, PTRACE_EVENT_FORK)) {
@@ -346,4 +333,5 @@ void send_control_command(Command cmd) {
printf("send %ld != %ld\n", nsend, sizeof(cmd));
exit(1);
}
printf("command sent\n");
}