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eclipse / gerrit / tcf / org.eclipse.tcf.agent / refs/heads/0.5.0 / . / services / runctrl.c
blob: b3b5a51ca90da8022351be2155cf569b1995859b [file] [log] [blame]
/*******************************************************************************
* Copyright (c) 2007, 2010 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
/*
* Target service implementation: run control (TCF name RunControl)
*/
#include <config.h>
#if SERVICE_RunControl
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <assert.h>
#include <framework/protocol.h>
#include <framework/channel.h>
#include <framework/json.h>
#include <framework/context.h>
#include <framework/myalloc.h>
#include <framework/trace.h>
#include <framework/events.h>
#include <framework/exceptions.h>
#include <framework/signames.h>
#include <framework/cache.h>
#include <services/runctrl.h>
#include <services/breakpoints.h>
#include <services/linenumbers.h>
#include <services/stacktrace.h>
#include <services/symbols.h>
#include <main/cmdline.h>
#define EN_STEP_OVER (SERVICE_Breakpoints && SERVICE_StackTrace && ENABLE_Symbols)
#define EN_STEP_LINE (SERVICE_LineNumbers)
#define STOP_ALL_TIMEOUT 1000000
#define STOP_ALL_MAX_CNT 20
typedef struct Listener {
RunControlEventListener * func;
void * args;
} Listener;
static Listener * listeners = NULL;
static unsigned listener_cnt = 0;
static unsigned listener_max = 0;
static const char RUN_CONTROL[] = "RunControl";
typedef struct ContextExtensionRC {
int pending_safe_event; /* safe events are waiting for this context to be stopped */
int intercepted; /* context is reported to a host as suspended */
int intercepted_by_bp; /* intercept counter - only first intercept should report "Breakpoint" reason */
int intercept_group;
int reverse_run;
int step_mode;
int step_cnt;
int step_line_cnt;
ContextAddress step_range_start;
ContextAddress step_range_end;
ContextAddress step_frame;
ContextAddress step_bp_addr;
BreakpointInfo * step_bp_info;
CodeArea * step_code_area;
ErrorReport * step_error;
const char * step_done;
Channel * step_channel;
int step_continue_mode;
int safe_single_step; /* not zero if the context is performing a "safe" single instruction step */
LINK link;
} ContextExtensionRC;
static size_t context_extension_offset = 0;
#define EXT(ctx) (ctx ? ((ContextExtensionRC *)((char *)(ctx) + context_extension_offset)) : NULL)
#define link2ctx(lnk) ((Context *)((char *)(lnk) - offsetof(ContextExtensionRC, link) - context_extension_offset))
typedef struct SafeEvent {
Context * grp;
EventCallBack * done;
void * arg;
struct SafeEvent * next;
} SafeEvent;
typedef struct GetContextArgs {
Channel * c;
char token[256];
Context * ctx;
} GetContextArgs;
static SafeEvent * safe_event_list = NULL;
static SafeEvent * safe_event_last = NULL;
static int safe_event_pid_count = 0;
static int run_ctrl_lock_cnt = 0;
static int stop_all_timer_cnt = 0;
static int stop_all_timer_posted = 0;
static int run_safe_events_posted = 0;
static TCFBroadcastGroup * broadcast_group = NULL;
static void run_safe_events(void * arg);
static void write_context(OutputStream * out, Context * ctx) {
int md, modes;
Context * rc_grp = context_get_group(ctx, CONTEXT_GROUP_INTERCEPT);
Context * bp_grp = context_get_group(ctx, CONTEXT_GROUP_BREAKPOINT);
int has_state = context_has_state(ctx);
assert(!ctx->exited);
write_stream(out, '{');
json_write_string(out, "ID");
write_stream(out, ':');
json_write_string(out, ctx->id);
if (ctx->parent != NULL) {
write_stream(out, ',');
json_write_string(out, "ParentID");
write_stream(out, ':');
json_write_string(out, ctx->parent->id);
}
if (ctx->creator != NULL) {
write_stream(out, ',');
json_write_string(out, "CreatorID");
write_stream(out, ':');
json_write_string(out, ctx->creator->id);
}
write_stream(out, ',');
json_write_string(out, "ProcessID");
write_stream(out, ':');
json_write_string(out, context_get_group(ctx, CONTEXT_GROUP_PROCESS)->id);
if (ctx->name != NULL) {
write_stream(out, ',');
json_write_string(out, "Name");
write_stream(out, ':');
json_write_string(out, ctx->name);
}
write_stream(out, ',');
json_write_string(out, "CanSuspend");
write_stream(out, ':');
json_write_boolean(out, 1);
write_stream(out, ',');
json_write_string(out, "CanResume");
write_stream(out, ':');
modes = 0;
for (md = 0; md < RM_TERMINATE; md++) {
if (context_can_resume(ctx, md)) modes |= 1 << md;
}
if (!has_state) {
modes &= (1 << RM_RESUME) | (1 << RM_REVERSE_RESUME);
}
else {
if (modes & (1 << RM_STEP_INTO)) {
modes |= (1 << RM_STEP_INTO_RANGE);
#if EN_STEP_OVER
modes |= (1 << RM_STEP_OVER);
modes |= (1 << RM_STEP_OVER_RANGE);
modes |= (1 << RM_STEP_OUT);
#endif
#if EN_STEP_LINE
modes |= (1 << RM_STEP_INTO_LINE);
#endif
#if EN_STEP_OVER && EN_STEP_LINE
modes |= (1 << RM_STEP_OVER_LINE);
#endif
}
if (modes & (1 << RM_REVERSE_STEP_INTO)) {
modes |= (1 << RM_REVERSE_STEP_INTO_RANGE);
#if EN_STEP_OVER
modes |= (1 << RM_REVERSE_STEP_OVER);
modes |= (1 << RM_REVERSE_STEP_OVER_RANGE);
modes |= (1 << RM_REVERSE_STEP_OUT);
#endif
#if EN_STEP_LINE
modes |= (1 << RM_REVERSE_STEP_INTO_LINE);
#endif
#if EN_STEP_OVER && EN_STEP_LINE
modes |= (1 << RM_REVERSE_STEP_OVER_LINE);
#endif
}
}
json_write_long(out, modes);
if (has_state) {
write_stream(out, ',');
json_write_string(out, "HasState");
write_stream(out, ':');
json_write_boolean(out, 1);
}
else {
write_stream(out, ',');
json_write_string(out, "IsContainer");
write_stream(out, ':');
json_write_boolean(out, 1);
}
if (context_can_resume(ctx, RM_TERMINATE)) {
write_stream(out, ',');
json_write_string(out, "CanTerminate");
write_stream(out, ':');
json_write_boolean(out, 1);
}
if (rc_grp != ctx) {
write_stream(out, ',');
json_write_string(out, "RCGroup");
write_stream(out, ':');
json_write_string(out, rc_grp->id);
}
if (bp_grp != ctx) {
write_stream(out, ',');
json_write_string(out, "BPGroup");
write_stream(out, ':');
json_write_string(out, bp_grp->id);
}
write_stream(out, '}');
}
static int get_current_pc(Context * ctx, ContextAddress * res) {
size_t i;
uint8_t buf[8];
ContextAddress pc = 0;
RegisterDefinition * def = get_PC_definition(ctx);
if (def == NULL) {
set_errno(ERR_OTHER, "Program counter register not found");
return -1;
}
assert(def->size <= sizeof(buf));
if (context_read_reg(ctx, def, 0, def->size, buf) < 0) return -1;
for (i = 0; i < def->size; i++) {
pc = pc << 8;
pc |= buf[def->big_endian ? i : def->size - i - 1];
}
*res = pc;
return 0;
}
static void write_context_state(OutputStream * out, Context * ctx) {
int fst = 1;
const char * reason = NULL;
char ** bp_ids = NULL;
ContextExtensionRC * ext = EXT(ctx);
ContextAddress pc = 0;
int pc_error = 0;
assert(!ctx->exited);
if (!ext->intercepted) {
write_stringz(out, "0");
write_stringz(out, "null");
write_stringz(out, "null");
return;
}
/* Number: PC */
if (get_current_pc(ctx, &pc) < 0) pc_error = errno;
json_write_uint64(out, pc);
write_stream(out, 0);
/* String: Reason */
if (ext->intercepted_by_bp == 1) bp_ids = get_context_breakpoint_ids(ctx);
if (bp_ids != NULL) reason = REASON_BREAKPOINT;
else if (ctx->exception_description != NULL) reason = ctx->exception_description;
else if (ext->step_error != NULL) reason = errno_to_str(set_error_report_errno(ext->step_error));
else if (ext->step_done != NULL) reason = ext->step_done;
else reason = context_suspend_reason(ctx);
json_write_string(out, reason);
write_stream(out, 0);
/* Object: Additional context state info */
write_stream(out, '{');
if (ext->step_error == NULL && ext->step_done == NULL && ctx->signal) {
const char * name = signal_name(ctx->signal);
const char * desc = signal_description(ctx->signal);
json_write_string(out, "Signal");
write_stream(out, ':');
json_write_long(out, ctx->signal);
if (name != NULL) {
write_stream(out, ',');
json_write_string(out, "SignalName");
write_stream(out, ':');
json_write_string(out, name);
}
if (desc != NULL) {
write_stream(out, ',');
json_write_string(out, "SignalDescription");
write_stream(out, ':');
json_write_string(out, desc);
}
fst = 0;
}
if (bp_ids != NULL) {
int i = 0;
if (!fst) write_stream(out, ',');
json_write_string(out, "BPs");
write_stream(out, ':');
write_stream(out, '[');
while (bp_ids[i] != NULL) {
if (i > 0) write_stream(out, ',');
json_write_string(out, bp_ids[i++]);
}
write_stream(out, ']');
fst = 0;
}
if (pc_error) {
if (!fst) write_stream(out, ',');
json_write_string(out, "PCError");
write_stream(out, ':');
write_error_object(out, pc_error);
fst = 0;
}
#if ENABLE_ContextStateProperties
{
/* Back-end context state properties */
int cnt = 0;
const char ** names = NULL;
const char ** values = NULL;
if (context_get_state_properties(ctx, &names, &values, &cnt) == 0) {
while (cnt > 0) {
if (*values != NULL) {
if (!fst) write_stream(out, ',');
json_write_string(out, *names++);
write_stream(out, ':');
json_write_string(out, *values++);
fst = 0;
}
cnt--;
}
}
}
#endif
write_stream(out, '}');
write_stream(out, 0);
}
static void command_get_context(char * token, Channel * c) {
int err = 0;
char id[256];
Context * ctx = NULL;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
ctx = id2ctx(id);
if (ctx == NULL) err = ERR_INV_CONTEXT;
else if (ctx->exited) err = ERR_ALREADY_EXITED;
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, err);
if (err == 0) {
write_context(&c->out, ctx);
write_stream(&c->out, 0);
}
else {
write_stringz(&c->out, "null");
}
write_stream(&c->out, MARKER_EOM);
}
static void command_get_children(char * token, Channel * c) {
char id[256];
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, 0);
write_stream(&c->out, '[');
if (id[0] == 0) {
LINK * l;
int cnt = 0;
for (l = context_root.next; l != &context_root; l = l->next) {
Context * ctx = ctxl2ctxp(l);
if (ctx->parent != NULL) continue;
if (ctx->exited) continue;
if (cnt > 0) write_stream(&c->out, ',');
json_write_string(&c->out, ctx->id);
cnt++;
}
}
else {
Context * parent = id2ctx(id);
if (parent != NULL) {
LINK * l;
int cnt = 0;
for (l = parent->children.next; l != &parent->children; l = l->next) {
Context * ctx = cldl2ctxp(l);
assert(ctx->parent == parent);
if (ctx->exited) continue;
if (cnt > 0) write_stream(&c->out, ',');
json_write_string(&c->out, ctx->id);
cnt++;
}
}
}
write_stream(&c->out, ']');
write_stream(&c->out, 0);
write_stream(&c->out, MARKER_EOM);
}
static void command_get_state(char * token, Channel * c) {
char id[256];
Context * ctx = NULL;
ContextExtensionRC * ext = NULL;
int err = 0;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
ctx = id2ctx(id);
ext = EXT(ctx);
if (ctx == NULL || !context_has_state(ctx)) err = ERR_INV_CONTEXT;
else if (ctx->exited) err = ERR_ALREADY_EXITED;
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, err);
json_write_boolean(&c->out, ctx != NULL && ext->intercepted);
write_stream(&c->out, 0);
if (err) {
write_stringz(&c->out, "0");
write_stringz(&c->out, "null");
write_stringz(&c->out, "null");
}
else {
write_context_state(&c->out, ctx);
}
write_stream(&c->out, MARKER_EOM);
}
static void send_simple_result(Channel * c, char * token, int err) {
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
write_errno(&c->out, err);
write_stream(&c->out, MARKER_EOM);
}
static void send_event_context_resumed(Context * ctx);
typedef struct ResumeParams {
ContextAddress range_start;
ContextAddress range_end;
int error;
} ResumeParams;
static void resume_params_callback(InputStream * inp, const char * name, void * x) {
ResumeParams * args = (ResumeParams *)x;
if (strcmp(name, "RangeStart") == 0) args->range_start = (ContextAddress)json_read_uint64(inp);
else if (strcmp(name, "RangeEnd") == 0) args->range_end = (ContextAddress)json_read_uint64(inp);
else {
json_skip_object(inp);
args->error = ERR_UNSUPPORTED;
}
}
static int resume_context_tree(Context * ctx) {
if (!context_has_state(ctx)) {
LINK * l;
for (l = ctx->children.next; l != &ctx->children; l = l->next) {
Context * x = cldl2ctxp(l);
if (!x->exited) resume_context_tree(x);
}
}
else if (EXT(ctx)->intercepted) {
Context * grp = context_get_group(ctx, CONTEXT_GROUP_INTERCEPT);
send_event_context_resumed(grp);
assert(!EXT(ctx)->intercepted);
if (run_ctrl_lock_cnt == 0 && run_safe_events_posted < 4) {
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
}
return 0;
}
static void free_code_area(CodeArea * area) {
loc_free(area->directory);
loc_free(area->file);
loc_free(area);
}
static void cancel_step_mode(Context * ctx) {
ContextExtensionRC * ext = EXT(ctx);
if (ext->step_channel) {
channel_unlock(ext->step_channel);
ext->step_channel = NULL;
}
if (ext->step_bp_info != NULL) {
destroy_eventpoint(ext->step_bp_info);
ext->step_bp_info = NULL;
}
if (ext->step_code_area != NULL) {
free_code_area(ext->step_code_area);
ext->step_code_area = NULL;
}
ext->step_cnt = 0;
ext->step_line_cnt = 0;
ext->step_range_start = 0;
ext->step_range_end = 0;
ext->step_frame = 0;
ext->step_bp_addr = 0;
ext->step_continue_mode = RM_RESUME;
ext->step_mode = RM_RESUME;
}
static void start_step_mode(Context * ctx, Channel * c, int mode, ContextAddress range_start, ContextAddress range_end) {
ContextExtensionRC * ext = EXT(ctx);
cancel_step_mode(ctx);
if (ext->step_error) {
release_error_report(ext->step_error);
ext->step_error = NULL;
}
if (c != NULL) {
ext->step_channel = c;
channel_lock(ext->step_channel);
}
else if (ext->step_channel != NULL) {
channel_unlock(ext->step_channel);
ext->step_channel = NULL;
}
ext->step_done = NULL;
ext->step_mode = mode;
ext->step_range_start = range_start;
ext->step_range_end = range_end;
}
int continue_debug_context(Context * ctx, Channel * c,
int mode, int count, ContextAddress range_start, ContextAddress range_end) {
ContextExtensionRC * ext = EXT(ctx);
Context * grp = context_get_group(ctx, CONTEXT_GROUP_INTERCEPT);
int err = 0;
EXT(grp)->reverse_run = 0;
switch (mode) {
case RM_REVERSE_RESUME:
case RM_REVERSE_STEP_OVER:
case RM_REVERSE_STEP_INTO:
case RM_REVERSE_STEP_OVER_LINE:
case RM_REVERSE_STEP_INTO_LINE:
case RM_REVERSE_STEP_OUT:
case RM_REVERSE_STEP_OVER_RANGE:
case RM_REVERSE_STEP_INTO_RANGE:
case RM_REVERSE_UNTIL_ACTIVE:
EXT(grp)->reverse_run = 1;
break;
}
if (context_has_state(ctx)) start_step_mode(ctx, c, mode, range_start, range_end);
if (ctx->exited) {
err = ERR_ALREADY_EXITED;
}
else if (context_has_state(ctx) && !ext->intercepted) {
err = ERR_ALREADY_RUNNING;
}
else if (count != 1) {
err = EINVAL;
}
else if (resume_context_tree(ctx) < 0) {
err = errno;
}
assert(err || !ext->intercepted);
if (err) {
cancel_step_mode(ctx);
errno = err;
return -1;
}
return 0;
}
static void command_resume(char * token, Channel * c) {
char id[256];
int mode;
long count;
int err = 0;
ResumeParams args;
Context * ctx = NULL;
memset(&args, 0, sizeof(args));
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
mode = (int)json_read_long(&c->inp);
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
count = json_read_long(&c->inp);
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (peek_stream(&c->inp) != MARKER_EOM) {
json_read_struct(&c->inp, resume_params_callback, &args);
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
err = args.error;
}
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
if (err == 0 && (ctx = id2ctx(id)) == NULL) err = ERR_INV_CONTEXT;
if (err == 0 && continue_debug_context(ctx, c, mode, count, args.range_start, args.range_end) < 0) err = errno;
send_simple_result(c, token, err);
}
int suspend_debug_context(Context * ctx) {
ContextExtensionRC * ext = EXT(ctx);
if (ctx->exited) {
/* do nothing */
}
else if (context_has_state(ctx)) {
assert(!ctx->stopped || !ext->safe_single_step);
if (!ctx->stopped) {
assert(!ext->intercepted);
if (!ctx->exiting) {
ctx->pending_intercept = 1;
if (!ext->safe_single_step && context_stop(ctx) < 0) return -1;
}
}
else if (!ext->intercepted) {
ctx->pending_intercept = 1;
if (run_ctrl_lock_cnt == 0 && run_safe_events_posted < 4) {
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
}
}
else {
LINK * l;
for (l = ctx->children.next; l != &ctx->children; l = l->next) {
suspend_debug_context(cldl2ctxp(l));
}
}
return 0;
}
static void command_suspend(char * token, Channel * c) {
char id[256];
Context * ctx = NULL;
ContextExtensionRC * ext = NULL;
int err = 0;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
ctx = id2ctx(id);
ext = EXT(ctx);
if (ctx == NULL) {
err = ERR_INV_CONTEXT;
}
else if (ctx->exited) {
err = ERR_ALREADY_EXITED;
}
else if (ext->intercepted) {
err = ERR_ALREADY_STOPPED;
}
else if (suspend_debug_context(ctx) < 0) {
err = errno;
}
send_simple_result(c, token, err);
}
static void terminate_context_tree(Context * ctx) {
if (ctx->exited) return;
if (context_can_resume(ctx, RM_TERMINATE)) {
ContextExtensionRC * ext = EXT(ctx);
cancel_step_mode(ctx);
ctx->pending_intercept = 0;
ext->step_mode = RM_TERMINATE;
resume_context_tree(ctx);
}
else {
LINK * l = ctx->children.next;
while (l != &ctx->children) {
Context * x = cldl2ctxp(l);
terminate_context_tree(x);
l = l->next;
}
}
}
static void event_terminate(void * args) {
Context * ctx = (Context *)args;
terminate_context_tree(ctx);
context_unlock(ctx);
}
int terminate_debug_context(Context * ctx) {
int err = 0;
if (ctx == NULL) {
err = ERR_INV_CONTEXT;
}
else if (ctx->exited) {
err = ERR_ALREADY_EXITED;
}
else {
context_lock(ctx);
post_safe_event(ctx, event_terminate, ctx);
}
if (err) {
errno = err;
return -1;
}
return 0;
}
static void command_terminate(char * token, Channel * c) {
char id[256];
int err = 0;
json_read_string(&c->inp, id, sizeof(id));
if (read_stream(&c->inp) != 0) exception(ERR_JSON_SYNTAX);
if (read_stream(&c->inp) != MARKER_EOM) exception(ERR_JSON_SYNTAX);
if (terminate_debug_context(id2ctx(id)) != 0) err = errno;
send_simple_result(c, token, err);
}
static void notify_context_intercepted(Context * ctx) {
unsigned i;
ContextExtensionRC * ext = EXT(ctx);
assert(!ext->intercepted);
ext->intercepted = 1;
for (i = 0; i < listener_cnt; i++) {
Listener * l = listeners + i;
if (l->func->context_intercepted == NULL) continue;
l->func->context_intercepted(ctx, l->args);
}
}
static void notify_context_released(Context * ctx) {
unsigned i;
ContextExtensionRC * ext = EXT(ctx);
assert(ext->intercepted);
ext->intercepted = 0;
for (i = 0; i < listener_cnt; i++) {
Listener * l = listeners + i;
if (l->func->context_released == NULL) continue;
l->func->context_released(ctx, l->args);
}
}
static void send_event_context_added(Context * ctx) {
OutputStream * out = &broadcast_group->out;
write_stringz(out, "E");
write_stringz(out, RUN_CONTROL);
write_stringz(out, "contextAdded");
/* <array of context data> */
write_stream(out, '[');
write_context(out, ctx);
write_stream(out, ']');
write_stream(out, 0);
write_stream(out, MARKER_EOM);
}
static void send_event_context_changed(Context * ctx) {
OutputStream * out = &broadcast_group->out;
write_stringz(out, "E");
write_stringz(out, RUN_CONTROL);
write_stringz(out, "contextChanged");
/* <array of context data> */
write_stream(out, '[');
write_context(out, ctx);
write_stream(out, ']');
write_stream(out, 0);
write_stream(out, MARKER_EOM);
}
static void send_event_context_removed(Context * ctx) {
OutputStream * out = &broadcast_group->out;
ContextExtensionRC * ext = EXT(ctx);
if (ext->intercepted) notify_context_released(ctx);
write_stringz(out, "E");
write_stringz(out, RUN_CONTROL);
write_stringz(out, "contextRemoved");
/* <array of context IDs> */
write_stream(out, '[');
json_write_string(out, ctx->id);
write_stream(out, ']');
write_stream(out, 0);
write_stream(out, MARKER_EOM);
}
static void send_event_context_suspended(void) {
LINK p0; /* List of contexts intercepted by breakpoint or exception */
LINK p1; /* List of all other intercepted contexts */
LINK * l = context_root.next;
list_init(&p0);
list_init(&p1);
while (l != &context_root) {
Context * x = ctxl2ctxp(l);
l = l->next;
if (x->pending_intercept && x->stopped) {
LINK * n = &p1;
ContextExtensionRC * e = EXT(x);
assert(!x->exited);
assert(!e->intercepted);
assert(!e->safe_single_step);
cancel_step_mode(x);
notify_context_intercepted(x);
x->pending_intercept = 0;
if (get_context_breakpoint_ids(x) != NULL) e->intercepted_by_bp++;
if (e->intercepted_by_bp || x->stopped_by_exception) n = &p0;
list_add_last(&e->link, n);
}
}
while (!list_is_empty(&p0) || !list_is_empty(&p1)) {
OutputStream * out = &broadcast_group->out;
LINK * n = !list_is_empty(&p0) ? p0.next : p1.next;
Context * ctx = link2ctx(n);
int container = list_is_empty(&p0) && !list_is_empty(&p1);
list_remove(n);
write_stringz(out, "E");
write_stringz(out, RUN_CONTROL);
write_stringz(out, container ? "containerSuspended" : "contextSuspended");
json_write_string(out, ctx->id);
write_stream(out, 0);
write_context_state(out, ctx);
if (container) {
write_stream(out, '[');
json_write_string(out, ctx->id);
l = p1.next;
while (l != &p1) {
Context * x = link2ctx(l);
write_stream(out, ',');
json_write_string(out, x->id);
l = l->next;
}
write_stream(out, ']');
write_stream(out, 0);
list_init(&p1);
}
write_stream(out, MARKER_EOM);
}
}
static void send_event_context_resumed(Context * grp) {
LINK * l = NULL;
LINK p;
list_init(&p);
l = context_root.next;
while (l != &context_root) {
Context * ctx = ctxl2ctxp(l);
ContextExtensionRC * ext = EXT(ctx);
if (ext->intercepted && context_get_group(ctx, CONTEXT_GROUP_INTERCEPT) == grp) {
assert(!ctx->pending_intercept);
assert(!ext->safe_single_step);
notify_context_released(ctx);
list_add_last(&ext->link, &p);
}
l = l->next;
}
if (!list_is_empty(&p)) {
OutputStream * out = &broadcast_group->out;
write_stringz(out, "E");
write_stringz(out, RUN_CONTROL);
if (p.next == p.prev) {
Context * ctx = link2ctx(p.next);
write_stringz(out, "contextResumed");
json_write_string(out, ctx->id);
}
else {
l = p.next;
write_stringz(out, "containerResumed");
write_stream(out, '[');
while (l != &p) {
Context * ctx = link2ctx(l);
if (l != p.next) write_stream(out, ',');
json_write_string(out, ctx->id);
l = l->next;
}
write_stream(out, ']');
}
write_stream(out, 0);
write_stream(out, MARKER_EOM);
}
}
static void send_event_context_exception(Context * ctx) {
OutputStream * out = &broadcast_group->out;
write_stringz(out, "E");
write_stringz(out, RUN_CONTROL);
write_stringz(out, "contextException");
/* String: Context ID */
json_write_string(out, ctx->id);
write_stream(out, 0);
/* String: Human readable description of the exception */
if (ctx->exception_description) {
json_write_string(out, ctx->exception_description);
}
else if (ctx->signal > 0) {
char buf[128];
const char * desc = signal_description(ctx->signal);
if (desc == NULL) desc = signal_name(ctx->signal);
snprintf(buf, sizeof(buf), desc == NULL ? "Signal %d" : "Signal %d: %s", ctx->signal, desc);
json_write_string(out, buf);
}
else {
json_write_string(out, context_suspend_reason(ctx));
}
write_stream(out, 0);
write_stream(out, MARKER_EOM);
}
int is_all_stopped(Context * ctx) {
LINK * l;
Context * grp = context_get_group(ctx, CONTEXT_GROUP_STOP);
for (l = context_root.next; l != &context_root; l = l->next) {
Context * ctx = ctxl2ctxp(l);
if (ctx->exited || ctx->exiting) continue;
if (!context_has_state(ctx)) continue;
if (context_get_group(ctx, CONTEXT_GROUP_STOP) != grp) continue;
if (!ctx->stopped) return 0;
}
return 1;
}
#if EN_STEP_LINE
static int is_same_line(CodeArea * x, CodeArea * y) {
if (x == NULL || y == NULL) return 0;
if (x->start_line != y->start_line) return 0;
if (x->directory != y->directory && (x->directory == NULL || strcmp(x->directory, y->directory))) return 0;
if (x->file != y->file && (x->file == NULL || strcmp(x->file, y->file))) return 0;
return 1;
}
static void update_step_machine_code_area(CodeArea * area, void * args) {
ContextExtensionRC * ext = (ContextExtensionRC *)args;
if (ext->step_code_area != NULL) return;
ext->step_code_area = (CodeArea *)loc_alloc(sizeof(CodeArea));
*ext->step_code_area = *area;
if (area->directory != NULL) ext->step_code_area->directory = loc_strdup(area->directory);
if (area->file != NULL) ext->step_code_area->file = loc_strdup(area->file);
}
#endif
#if EN_STEP_OVER
static void step_machine_breakpoint(Context * ctx, void * args) {
}
#endif
static int update_step_machine_state(Context * ctx) {
ContextExtensionRC * ext = EXT(ctx);
ContextAddress addr = 0;
if (!context_has_state(ctx) || ctx->exited || ctx->pending_intercept) {
cancel_step_mode(ctx);
return 0;
}
if (get_current_pc(ctx, &addr) < 0) {
int n = errno;
if (ctx->stopped && get_error_code(n) == ERR_NOT_ACTIVE) {
switch (ext->step_mode) {
case RM_STEP_OVER:
case RM_STEP_INTO:
case RM_STEP_OVER_LINE:
case RM_STEP_INTO_LINE:
case RM_STEP_OUT:
case RM_STEP_OVER_RANGE:
case RM_STEP_INTO_RANGE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_UNTIL_ACTIVE)) return 0;
break;
case RM_REVERSE_STEP_OVER:
case RM_REVERSE_STEP_INTO:
case RM_REVERSE_STEP_OVER_LINE:
case RM_REVERSE_STEP_INTO_LINE:
case RM_REVERSE_STEP_OUT:
case RM_REVERSE_STEP_OVER_RANGE:
case RM_REVERSE_STEP_INTO_RANGE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_UNTIL_ACTIVE)) return 0;
break;
}
}
errno = n;
return -1;
}
assert(ctx->stopped);
assert(ctx->pending_intercept == 0);
assert(ext->intercepted == 0);
#if EN_STEP_OVER
{
ContextAddress step_bp_addr = 0;
switch (ext->step_mode) {
case RM_STEP_OVER:
case RM_STEP_OVER_RANGE:
case RM_STEP_OVER_LINE:
case RM_REVERSE_STEP_OVER:
case RM_REVERSE_STEP_OVER_RANGE:
case RM_REVERSE_STEP_OVER_LINE:
if (ext->step_cnt == 0) {
StackFrame * info = NULL;
ext->step_frame = 0;
if (get_frame_info(ctx, STACK_TOP_FRAME, &info) < 0) break;
ext->step_frame = info->fp;
}
else if (addr < ext->step_range_start || addr >= ext->step_range_end) {
StackFrame * info = NULL;
int n = get_top_frame(ctx);
if (n < 0) return -1;
if (get_frame_info(ctx, n, &info) < 0) return -1;
if (ext->step_frame != info->fp) {
while (n > 0) {
if (get_frame_info(ctx, --n, &info) < 0) return -1;
if (ext->step_frame == info->fp) {
uint64_t pc = 0;
if (read_reg_value(info, get_PC_definition(ctx), &pc) < 0) return -1;
step_bp_addr = (ContextAddress)pc;
break;
}
}
}
else {
switch (ext->step_mode) {
case RM_REVERSE_STEP_OVER:
case RM_REVERSE_STEP_OVER_RANGE:
case RM_REVERSE_STEP_OVER_LINE:
{
/* Workaround for GCC debug information that contains
* invalid stack frame information for function epilogues */
Symbol * sym_org = NULL;
Symbol * sym_now = NULL;
ContextAddress sym_org_addr = ext->step_range_start;
ContextAddress sym_now_addr = addr;
int anomaly =
find_symbol_by_addr(ctx, n, sym_now_addr, &sym_now) >= 0 &&
find_symbol_by_addr(ctx, n, sym_org_addr, &sym_org) >= 0 &&
get_symbol_address(sym_now, &sym_now_addr) >= 0 &&
get_symbol_address(sym_org, &sym_org_addr) >= 0 &&
sym_now_addr != sym_org_addr;
if (anomaly) {
/* Step over the anomaly */
ext->step_continue_mode = RM_REVERSE_STEP_INTO;
return 0;
}
}
break;
}
}
}
break;
case RM_STEP_OUT:
case RM_REVERSE_STEP_OUT:
{
StackFrame * info = NULL;
int n = get_top_frame(ctx);
if (n < 0) return -1;
if (ext->step_cnt == 0) {
if (n == 0) {
set_errno(ERR_OTHER, "Cannot step out: no parent stack frame");
return -1;
}
if (get_frame_info(ctx, n - 1, &info) < 0) return -1;
ext->step_frame = info->fp;
}
while (n > 0) {
if (get_frame_info(ctx, --n, &info) < 0) return -1;
if (ext->step_frame == info->fp) {
uint64_t pc = 0;
if (read_reg_value(info, get_PC_definition(ctx), &pc) < 0) return -1;
step_bp_addr = (ContextAddress)pc;
break;
}
}
}
break;
}
if (step_bp_addr) {
switch (ext->step_mode) {
case RM_STEP_OVER:
case RM_STEP_OVER_RANGE:
case RM_STEP_OVER_LINE:
case RM_STEP_OUT:
ext->step_continue_mode = RM_RESUME;
break;
case RM_REVERSE_STEP_OVER:
case RM_REVERSE_STEP_OVER_RANGE:
case RM_REVERSE_STEP_OVER_LINE:
case RM_REVERSE_STEP_OUT:
if (ext->step_line_cnt > 1) {
ext->step_continue_mode = RM_RESUME;
}
else {
step_bp_addr--;
ext->step_continue_mode = RM_REVERSE_RESUME;
}
break;
default:
errno = ERR_UNSUPPORTED;
return -1;
}
if (ext->step_bp_info == NULL || ext->step_bp_addr != step_bp_addr) {
char bf[64];
snprintf(bf, sizeof(bf), "0x%" PRIX64, (uint64_t)step_bp_addr);
if (ext->step_bp_info != NULL) destroy_eventpoint(ext->step_bp_info);
ext->step_bp_info = create_eventpoint(bf, ctx, step_machine_breakpoint, NULL);
ext->step_bp_addr = step_bp_addr;
}
return 0;
}
if (ext->step_bp_info != NULL) {
destroy_eventpoint(ext->step_bp_info);
ext->step_bp_info = NULL;
}
}
#endif /* EN_STEP_OVER */
switch (ext->step_mode) {
case RM_RESUME:
case RM_REVERSE_RESUME:
{
int mode = ext->step_mode;
cancel_step_mode(ctx);
ext->step_continue_mode = mode;
}
return 0;
case RM_STEP_INTO:
case RM_STEP_OVER:
case RM_REVERSE_STEP_INTO:
case RM_REVERSE_STEP_OVER:
if (ext->step_cnt == 0) {
ext->step_range_start = addr;
ext->step_range_end = addr + 1;
}
/* fall through */
case RM_STEP_INTO_RANGE:
case RM_STEP_OVER_RANGE:
case RM_REVERSE_STEP_INTO_RANGE:
case RM_REVERSE_STEP_OVER_RANGE:
if (ext->step_cnt > 0 && (addr < ext->step_range_start || addr >= ext->step_range_end)) {
ctx->pending_intercept = 1;
ext->step_done = REASON_STEP;
return 0;
}
break;
#if EN_STEP_LINE
case RM_STEP_INTO_LINE:
case RM_STEP_OVER_LINE:
case RM_REVERSE_STEP_INTO_LINE:
case RM_REVERSE_STEP_OVER_LINE:
if (ext->step_cnt == 0) {
if (ext->step_code_area == NULL) {
if (address_to_line(ctx, addr, addr + 1, update_step_machine_code_area, ext) < 0) return -1;
}
if (ext->step_code_area != NULL) {
ext->step_range_start = ext->step_code_area->start_address;
ext->step_range_end = ext->step_code_area->end_address;
}
else {
ext->step_range_start = addr;
ext->step_range_end = addr + 1;
}
}
else if (addr < ext->step_range_start || addr >= ext->step_range_end) {
int same_line = 0;
CodeArea * area = ext->step_code_area;
if (area == NULL) {
ctx->pending_intercept = 1;
ext->step_done = REASON_STEP;
return 0;
}
ext->step_code_area = NULL;
if (address_to_line(ctx, addr, addr + 1, update_step_machine_code_area, ext) < 0) {
free_code_area(area);
return -1;
}
if (ext->step_code_area == NULL) {
free_code_area(area);
ctx->pending_intercept = 1;
ext->step_done = REASON_STEP;
return 0;
}
same_line = is_same_line(ext->step_code_area, area);
free_code_area(area);
if (!same_line) {
if ((ext->step_mode != RM_REVERSE_STEP_INTO_LINE && ext->step_mode != RM_REVERSE_STEP_OVER_LINE) ||
(ext->step_line_cnt == 0 && addr == ext->step_code_area->start_address) ||
ext->step_line_cnt >= 2) {
ctx->pending_intercept = 1;
ext->step_done = REASON_STEP;
return 0;
}
/* Current IP is in the middle of a source line.
* Continue stepping to get to the beginning of the line */
ext->step_line_cnt++;
}
ext->step_range_start = ext->step_code_area->start_address;
ext->step_range_end = ext->step_code_area->end_address;
}
break;
#endif
case RM_STEP_OUT:
case RM_REVERSE_STEP_OUT:
ctx->pending_intercept = 1;
ext->step_done = REASON_STEP;
return 0;
default:
errno = ERR_UNSUPPORTED;
return -1;
}
if (ext->step_line_cnt > 1) {
if (ext->step_mode == RM_REVERSE_STEP_INTO_LINE) ext->step_continue_mode = RM_STEP_INTO_LINE;
if (ext->step_mode == RM_REVERSE_STEP_OVER_LINE) ext->step_continue_mode = RM_STEP_OVER_LINE;
}
else {
ext->step_continue_mode = ext->step_mode;
if (ext->step_line_cnt == 0 && context_can_resume(ctx, ext->step_continue_mode)) return 0;
}
switch (ext->step_continue_mode) {
case RM_STEP_INTO_LINE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_INTO_RANGE)) return 0;
break;
case RM_STEP_OVER_LINE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_OVER_RANGE)) return 0;
break;
case RM_REVERSE_STEP_INTO_LINE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_INTO_RANGE)) return 0;
break;
case RM_REVERSE_STEP_OVER_LINE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_OVER_RANGE)) return 0;
break;
}
switch (ext->step_continue_mode) {
case RM_STEP_OVER:
if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_INTO)) return 0;
break;
case RM_STEP_OVER_RANGE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_INTO_RANGE)) return 0;
break;
case RM_REVERSE_STEP_OVER:
if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_INTO)) return 0;
break;
case RM_REVERSE_STEP_OVER_RANGE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_INTO_RANGE)) return 0;
break;
}
switch (ext->step_continue_mode) {
case RM_STEP_INTO_RANGE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_INTO)) return 0;
break;
case RM_REVERSE_STEP_INTO_RANGE:
if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_INTO)) return 0;
break;
}
errno = ERR_UNSUPPORTED;
return -1;
}
static void step_machine_cache_client(void * args) {
int error = 0;
Context * ctx = *(Context **)args;
ContextExtensionRC * ext = EXT(ctx);
assert(ext->step_mode);
assert(ext->step_error == NULL);
if (update_step_machine_state(ctx) < 0) error = errno;
cache_exit();
if (error) {
cancel_step_mode(ctx);
ext->step_error = get_error_report(error);
ctx->pending_intercept = 1;
}
run_ctrl_unlock();
context_unlock(ctx);
}
static void stop_all_timer(void * args) {
stop_all_timer_posted = 0;
stop_all_timer_cnt++;
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
static void sync_run_state() {
int err_cnt = 0;
LINK * l;
LINK p;
assert(run_ctrl_lock_cnt == 0);
assert(safe_event_list == NULL);
stop_all_timer_cnt = 0;
/* Clear intercept group flags */
l = context_root.next;
while (l != &context_root) {
Context * ctx = ctxl2ctxp(l);
ContextExtensionRC * ext = EXT(ctx);
ext->pending_safe_event = 0;
if (context_has_state(ctx)) {
Context * grp = context_get_group(ctx, CONTEXT_GROUP_INTERCEPT);
EXT(grp)->intercept_group = 0;
}
else if (ext->step_mode == RM_TERMINATE) {
context_resume(ctx, RM_TERMINATE, 0, 0);
}
l = l->next;
}
/* Set intercept group flags */
l = context_root.next;
while (l != &context_root) {
Context * grp = NULL;
Context * ctx = ctxl2ctxp(l);
ContextExtensionRC * ext = EXT(ctx);
l = l->next;
if (ctx->exited) continue;
if (!ctx->stopped) continue;
grp = context_get_group(ctx, CONTEXT_GROUP_INTERCEPT);
if (ext->intercepted) {
EXT(grp)->intercept_group = 1;
continue;
}
if (ext->step_mode == RM_RESUME || ext->step_mode == RM_REVERSE_RESUME || ext->step_mode == RM_TERMINATE) {
ext->step_continue_mode = ext->step_mode;
}
else {
if (ext->step_channel == NULL) {
if (update_step_machine_state(ctx) < 0) {
ext->step_error = get_error_report(errno);
cancel_step_mode(ctx);
ctx->pending_intercept = 1;
}
}
else if (is_channel_closed(ext->step_channel)) {
cancel_step_mode(ctx);
}
else {
run_ctrl_lock();
context_lock(ctx);
cache_enter(step_machine_cache_client, ext->step_channel, &ctx, sizeof(ctx));
}
}
if (ctx->pending_intercept) {
EXT(grp)->intercept_group = 1;
}
}
/* Stop or continue contexts as needed */
list_init(&p);
l = context_root.next;
while (err_cnt == 0 && run_ctrl_lock_cnt == 0 && l != &context_root) {
Context * grp = NULL;
Context * ctx = ctxl2ctxp(l);
ContextExtensionRC * ext = EXT(ctx);
l = l->next;
if (ctx->exited) continue;
if (ext->intercepted) continue;
if (!context_has_state(ctx)) continue;
grp = context_get_group(ctx, CONTEXT_GROUP_INTERCEPT);
if (EXT(grp)->intercept_group) {
ctx->pending_intercept = 1;
if (!ctx->stopped && !ctx->exiting) {
assert(!ext->safe_single_step);
context_stop(ctx);
ext->pending_safe_event = 1;
safe_event_pid_count++;
assert(!ctx->stopped);
}
}
else if (ctx->stopped && !ctx->pending_intercept) {
if (ext->step_continue_mode != RM_RESUME) {
list_add_last(&ext->link, &p);
}
else if (context_resume(ctx, EXT(grp)->reverse_run ? RM_REVERSE_RESUME : RM_RESUME, 0, 0) < 0) {
int error = set_errno(errno, "Cannot resume");
ctx->signal = 0;
ctx->stopped = 1;
ctx->stopped_by_bp = 0;
ctx->stopped_by_cb = NULL;
ctx->stopped_by_exception = 1;
ctx->pending_intercept = 1;
loc_free(ctx->exception_description);
ctx->exception_description = loc_strdup(errno_to_str(error));
send_context_changed_event(ctx);
err_cnt++;
}
}
}
/* Resume contexts with resume mode other then RM_RESUME */
l = p.next;
while (err_cnt == 0 && run_ctrl_lock_cnt == 0 && l != &p) {
Context * ctx = link2ctx(l);
ContextExtensionRC * ext = EXT(ctx);
l = l->next;
if (context_resume(ctx, ext->step_continue_mode, ext->step_range_start, ext->step_range_end) < 0) {
int error = set_errno(errno, "Cannot resume");
ctx->signal = 0;
ctx->stopped = 1;
ctx->stopped_by_bp = 0;
ctx->stopped_by_cb = NULL;
ctx->stopped_by_exception = 1;
ctx->pending_intercept = 1;
loc_free(ctx->exception_description);
ctx->exception_description = loc_strdup(errno_to_str(error));
send_context_changed_event(ctx);
err_cnt++;
}
}
if (safe_event_pid_count > 0 || run_ctrl_lock_cnt > 0) return;
if (err_cnt > 0) {
if (run_safe_events_posted < 4) {
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
return;
}
send_event_context_suspended();
}
static void run_safe_events(void * arg) {
LINK * l;
Context * grp;
run_safe_events_posted--;
if (run_safe_events_posted > 0) return;
safe_event_pid_count = 0;
if (run_ctrl_lock_cnt == 0) {
sync_run_state();
return;
}
if (safe_event_list == NULL) return;
grp = safe_event_list->grp;
context_lock(grp);
l = context_root.next;
while (l != &context_root) {
Context * ctx = ctxl2ctxp(l);
ContextExtensionRC * ext = EXT(ctx);
l = l->next;
ext->pending_safe_event = 0;
if (context_get_group(ctx, CONTEXT_GROUP_STOP) != grp) continue;
if (ctx->exited || ctx->exiting) continue;
if (ctx->stopped || !context_has_state(ctx)) continue;
if (stop_all_timer_cnt >= STOP_ALL_MAX_CNT) {
trace(LOG_ALWAYS, "can't stop %s; error: timeout", ctx->id);
ctx->exiting = 1;
}
else {
if (stop_all_timer_cnt == STOP_ALL_MAX_CNT / 2) {
const char * msg = ext->safe_single_step ? "finish single step" : "stop";
trace(LOG_ALWAYS, "warning: waiting too long for context %s to %s", ctx->id, msg);
}
if (!ext->safe_single_step || stop_all_timer_cnt >= STOP_ALL_MAX_CNT / 2) {
if (context_stop(ctx) < 0) {
trace(LOG_ALWAYS, "can't stop %s; error %d: %s",
ctx->id, errno, errno_to_str(errno));
}
assert(!ctx->stopped);
}
ext->pending_safe_event = 1;
safe_event_pid_count++;
}
}
while (safe_event_list) {
Trap trap;
SafeEvent * i = safe_event_list;
if (i->grp != grp) {
assert(run_ctrl_lock_cnt > 0);
if (run_safe_events_posted == 0) {
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
break;
}
if (safe_event_pid_count > 0) {
if (!stop_all_timer_posted) {
stop_all_timer_posted = 1;
post_event_with_delay(stop_all_timer, NULL, STOP_ALL_TIMEOUT);
}
break;
}
assert(is_all_stopped(i->grp));
safe_event_list = i->next;
if (set_trap(&trap)) {
i->done(i->arg);
clear_trap(&trap);
}
else {
trace(LOG_ALWAYS, "Unhandled exception in \"safe\" event dispatch: %d %s",
trap.error, errno_to_str(trap.error));
}
run_ctrl_unlock();
context_unlock(i->grp);
loc_free(i);
}
context_unlock(grp);
}
static void check_safe_events(Context * ctx) {
ContextExtensionRC * ext = EXT(ctx);
assert(ctx->stopped || ctx->exited);
assert(ext->pending_safe_event);
assert(safe_event_pid_count > 0);
ext->pending_safe_event = 0;
safe_event_pid_count--;
if (safe_event_pid_count == 0) {
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
}
void post_safe_event(Context * ctx, EventCallBack * done, void * arg) {
SafeEvent * i = (SafeEvent *)loc_alloc_zero(sizeof(SafeEvent));
Context * grp = context_get_group(ctx, CONTEXT_GROUP_STOP);
run_ctrl_lock();
context_lock(grp);
if (safe_event_list == NULL) {
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
i->grp = grp;
i->done = done;
i->arg = arg;
if (safe_event_list == NULL) safe_event_list = i;
else safe_event_last->next = i;
safe_event_last = i;
}
int safe_context_single_step(Context * ctx) {
int res = 0;
ContextExtensionRC * ext = EXT(ctx);
assert(run_ctrl_lock_cnt > 0);
assert(ext->safe_single_step == 0);
ext->safe_single_step = 1;
res = context_single_step(ctx);
assert(res < 0 || !ctx->stopped);
if (res < 0) ext->safe_single_step = 0;
return res;
}
void run_ctrl_lock(void) {
if (run_ctrl_lock_cnt == 0) {
assert(safe_event_list == NULL);
#if ENABLE_Cmdline
cmdline_suspend();
#endif
}
run_ctrl_lock_cnt++;
}
void run_ctrl_unlock(void) {
assert(run_ctrl_lock_cnt > 0);
run_ctrl_lock_cnt--;
if (run_ctrl_lock_cnt == 0) {
assert(safe_event_list == NULL);
#if ENABLE_Cmdline
cmdline_resume();
#endif
/* Lazily continue execution of temporary stopped contexts */
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
}
void add_run_control_event_listener(RunControlEventListener * listener, void * args) {
if (listener_cnt >= listener_max) {
listener_max += 8;
listeners = (Listener *)loc_realloc(listeners, listener_max * sizeof(Listener));
}
listeners[listener_cnt].func = listener;
listeners[listener_cnt].args = args;
listener_cnt++;
}
static void event_context_created(Context * ctx, void * client_data) {
assert(!ctx->exited);
assert(!ctx->stopped);
send_event_context_added(ctx);
}
static void event_context_changed(Context * ctx, void * client_data) {
send_event_context_changed(ctx);
}
static void event_context_stopped(Context * ctx, void * client_data) {
ContextExtensionRC * ext = EXT(ctx);
assert(ctx->stopped);
assert(!ctx->exited);
assert(!ext->intercepted);
ext->safe_single_step = 0;
if (ext->step_mode) {
ext->step_cnt++;
}
else {
if (ext->step_error != NULL) {
release_error_report(ext->step_error);
ext->step_error = NULL;
}
ext->step_done = NULL;
}
if (ctx->stopped_by_bp || ctx->stopped_by_cb) evaluate_breakpoint(ctx);
if (ext->pending_safe_event) check_safe_events(ctx);
if (ctx->stopped_by_exception) send_event_context_exception(ctx);
if (run_ctrl_lock_cnt == 0 && run_safe_events_posted < 4) {
/* Lazily continue execution of temporary stopped contexts */
run_safe_events_posted++;
post_event(run_safe_events, NULL);
}
}
static void event_context_started(Context * ctx, void * client_data) {
ContextExtensionRC * ext = EXT(ctx);
assert(!ctx->stopped);
if (ext->intercepted) resume_context_tree(ctx);
ext->intercepted_by_bp = 0;
if (safe_event_list) {
if (!ext->safe_single_step && !ctx->exiting) {
context_stop(ctx);
}
if (!ext->pending_safe_event) {
ext->pending_safe_event = 1;
safe_event_pid_count++;
}
}
}
static void event_context_exited(Context * ctx, void * client_data) {
ContextExtensionRC * ext = EXT(ctx);
ext->safe_single_step = 0;
cancel_step_mode(ctx);
send_event_context_removed(ctx);
if (ext->pending_safe_event) check_safe_events(ctx);
}
static void event_context_disposed(Context * ctx, void * client_data) {
cancel_step_mode(ctx);
}
void ini_run_ctrl_service(Protocol * proto, TCFBroadcastGroup * bcg) {
static ContextEventListener listener = {
event_context_created,
event_context_exited,
event_context_stopped,
event_context_started,
event_context_changed,
event_context_disposed
};
broadcast_group = bcg;
add_context_event_listener(&listener, NULL);
context_extension_offset = context_extension(sizeof(ContextExtensionRC));
add_command_handler(proto, RUN_CONTROL, "getContext", command_get_context);
add_command_handler(proto, RUN_CONTROL, "getChildren", command_get_children);
add_command_handler(proto, RUN_CONTROL, "getState", command_get_state);
add_command_handler(proto, RUN_CONTROL, "resume", command_resume);
add_command_handler(proto, RUN_CONTROL, "suspend", command_suspend);
add_command_handler(proto, RUN_CONTROL, "terminate", command_terminate);
}
#else
#include <services/runctrl.h>
#include <assert.h>
void post_safe_event(Context * ctx, EventCallBack * done, void * arg) {
post_event(done, arg);
}
#endif /* SERVICE_RunControl */