Add stacktrace dump and better error messages on EXC_BAD_ACCESS panics (#2904)
diff --git a/src/debugAdapter/goDebug.ts b/src/debugAdapter/goDebug.ts
index 35447a5..811cf4a 100644
--- a/src/debugAdapter/goDebug.ts
+++ b/src/debugAdapter/goDebug.ts
@@ -132,6 +132,7 @@
id: number;
line: number;
pc: number;
+ goroutineID: number;
function?: DebugFunction;
}
@@ -153,6 +154,7 @@
goType: number;
args: DebugVariable[];
locals: DebugVariable[];
+ optimized: boolean;
}
interface ListVarsOut {
@@ -700,7 +702,7 @@
await this.callPromise('Detach', [this.isApiV1 ? true : { Kill: isLocalDebugging }]);
} catch (err) {
log('DetachResponse');
- logError(`Failed to detach - ${err.toString() || ''}`);
+ logError(err, 'Failed to detach');
shouldForceClean = isLocalDebugging;
}
}
@@ -874,7 +876,7 @@
// We use NonBlocking so the call would return immediately.
this.debugState = await this.delve.getDebugState();
} catch (error) {
- logError(`Failed to get state ${String(error)}`);
+ this.logDelveError(error, 'Failed to get state');
}
if (!this.debugState.Running && !this.continueRequestRunning) {
@@ -885,15 +887,13 @@
() => {
return this.setBreakPoints(response, args).then(() => {
return this.continue(true).then(null, (err) => {
- logError(
- `Failed to continue delve after halting it to set breakpoints: "${err.toString()}"`
- );
+ this.logDelveError(err, 'Failed to continue delve after halting it to set breakpoints');
});
});
},
(err) => {
this.skipStopEventOnce = false;
- logError(err);
+ this.logDelveError(err, 'Failed to halt delve before attempting to set breakpoint');
return this.sendErrorResponse(
response,
2008,
@@ -921,7 +921,7 @@
}
if (err) {
- logError('Failed to get threads - ' + err.toString());
+ this.logDelveError(err, 'Failed to get threads');
return this.sendErrorResponse(response, 2003, 'Unable to display threads: "{e}"', {
e: err.toString()
});
@@ -963,7 +963,7 @@
[stackTraceIn],
(err, out) => {
if (err) {
- logError('Failed to produce stack trace!');
+ this.logDelveError(err, 'Failed to produce stacktrace');
return this.sendErrorResponse(response, 2004, 'Unable to produce stack trace: "{e}"', {
e: err.toString()
});
@@ -1004,7 +1004,7 @@
this.delve.isApiV1 ? [listLocalVarsIn] : [{ scope: listLocalVarsIn, cfg: this.delve.loadConfig }],
(err, out) => {
if (err) {
- logError('Failed to list local variables - ' + err.toString());
+ this.logDelveError(err, 'Failed to get list local variables');
return this.sendErrorResponse(response, 2005, 'Unable to list locals: "{e}"', {
e: err.toString()
});
@@ -1020,7 +1020,7 @@
: [{ scope: listLocalFunctionArgsIn, cfg: this.delve.loadConfig }],
(listFunctionErr, outArgs) => {
if (listFunctionErr) {
- logError('Failed to list function args - ' + listFunctionErr.toString());
+ this.logDelveError(listFunctionErr, 'Failed to list function args');
return this.sendErrorResponse(response, 2006, 'Unable to list args: "{e}"', {
e: listFunctionErr.toString()
});
@@ -1100,7 +1100,7 @@
this.delve.isApiV1 ? [filter] : [{ filter, cfg: this.delve.loadConfig }],
(listPkgVarsErr, listPkgVarsOut) => {
if (listPkgVarsErr) {
- logError('Failed to list global vars - ' + listPkgVarsErr.toString());
+ this.logDelveError(listPkgVarsErr, 'Failed to list global vars');
return this.sendErrorResponse(
response,
2007,
@@ -1172,7 +1172,7 @@
const variable = this.delve.isApiV1 ? <DebugVariable>result : (<EvalOut>result).Variable;
v.children = variable.children;
},
- (err) => logError('Failed to evaluate expression - ' + err.toString())
+ (err) => this.logDelveError(err, 'Failed to evaluate expression')
);
}
};
@@ -1251,7 +1251,7 @@
log('NextRequest');
this.delve.call<DebuggerState | CommandOut>('Command', [{ name: 'next' }], (err, out) => {
if (err) {
- logError('Failed to next - ' + err.toString());
+ this.logDelveError(err, 'Failed to next');
}
const state = this.delve.isApiV1 ? <DebuggerState>out : (<CommandOut>out).State;
log('next state', state);
@@ -1266,7 +1266,7 @@
log('StepInRequest');
this.delve.call<DebuggerState | CommandOut>('Command', [{ name: 'step' }], (err, out) => {
if (err) {
- logError('Failed to step - ' + err.toString());
+ this.logDelveError(err, 'Failed to step in');
}
const state = this.delve.isApiV1 ? <DebuggerState>out : (<CommandOut>out).State;
log('stop state', state);
@@ -1281,7 +1281,7 @@
log('StepOutRequest');
this.delve.call<DebuggerState | CommandOut>('Command', [{ name: 'stepOut' }], (err, out) => {
if (err) {
- logError('Failed to stepout - ' + err.toString());
+ this.logDelveError(err, 'Failed to step out');
}
const state = this.delve.isApiV1 ? <DebuggerState>out : (<CommandOut>out).State;
log('stepout state', state);
@@ -1296,7 +1296,7 @@
log('PauseRequest');
this.delve.call<DebuggerState | CommandOut>('Command', [{ name: 'halt' }], (err, out) => {
if (err) {
- logError('Failed to halt - ' + err.toString());
+ this.logDelveError(err, 'Failed to halt');
return this.sendErrorResponse(response, 2010, 'Unable to halt execution: "{e}"', {
e: err.toString()
});
@@ -1345,7 +1345,7 @@
this.delve.call(this.delve.isApiV1 ? 'SetSymbol' : 'Set', [setSymbolArgs], (err) => {
if (err) {
const errMessage = `Failed to set variable: ${err.toString()}`;
- logError(errMessage);
+ this.logDelveError(err, 'Failed to set variable');
return this.sendErrorResponse(response, 2010, errMessage);
}
response.body = { value: args.value };
@@ -1743,7 +1743,7 @@
// [TODO] Can we avoid doing this? https://github.com/Microsoft/vscode/issues/40#issuecomment-161999881
this.delve.call<DebugGoroutine[] | ListGoroutinesOut>('ListGoroutines', [], (err, out) => {
if (err) {
- logError('Failed to get threads - ' + err.toString());
+ this.logDelveError(err, 'Failed to get threads');
}
const goroutines = this.delve.isApiV1 ? <DebugGoroutine[]>out : (<ListGoroutinesOut>out).Goroutines;
this.updateGoroutinesList(goroutines);
@@ -1783,7 +1783,7 @@
if (!calledWhenSettingBreakpoint) {
errorCallback = (err: any) => {
if (err) {
- logError('Failed to continue - ' + err.toString());
+ this.logDelveError(err, 'Failed to continue');
}
this.handleReenterDebug('breakpoint');
throw err;
@@ -1840,6 +1840,87 @@
});
});
}
+
+ private logDelveError(err: any, message: string) {
+ if (err === undefined) {
+ return;
+ }
+
+ let errorMessage = err.toString();
+ // Handle unpropagated fatalpanic errors with a more user friendly message:
+ // https://github.com/microsoft/vscode-go/issues/1903#issuecomment-460126884
+ // https://github.com/go-delve/delve/issues/852
+ // This affects macOS only although we're agnostic of the OS at this stage, only handle the error
+ if (errorMessage === 'bad access') {
+ errorMessage = 'unpropagated fatalpanic: signal SIGSEGV (EXC_BAD_ACCESS). This fatalpanic is not traceable on macOS, see https://github.com/go-delve/delve/issues/852';
+ }
+
+ logError(message + ' - ' + errorMessage);
+
+ if (errorMessage === 'bad access') {
+ logError('WARNING: this stack might not be from the expected active goroutine');
+ }
+
+ this.dumpStacktrace();
+ }
+
+ private async dumpStacktrace() {
+ // Get current goroutine
+ // Debugger may be stopped at this point but we still can (and need) to obtain state and stacktrace
+ let goroutineId = 0;
+ try {
+ const stateCallResult = await this.delve.getDebugState();
+ // In some fault scenarios there may not be a currentGoroutine available from the debugger state
+ // Use the current thread
+ if (!stateCallResult.currentGoroutine) {
+ goroutineId = stateCallResult.currentThread.goroutineID;
+ } else {
+ goroutineId = stateCallResult.currentGoroutine.id;
+ }
+ } catch (error) {
+ logError('dumpStacktrace - Failed to get debugger state ' + error);
+ }
+
+ // Get goroutine stacktrace
+ const stackTraceIn = { id: goroutineId, depth: this.delve.stackTraceDepth };
+ if (!this.delve.isApiV1) {
+ Object.assign(stackTraceIn, { full: false, cfg: this.delve.loadConfig });
+ }
+ this.delve.call<DebugLocation[] | StacktraceOut>(
+ this.delve.isApiV1 ?
+ 'StacktraceGoroutine' : 'Stacktrace', [stackTraceIn], (err, out) => {
+ if (err) {
+ logError('dumpStacktrace: Failed to produce stack trace' + err);
+ return;
+ }
+ const locations = this.delve.isApiV1 ? <DebugLocation[]>out : (<StacktraceOut>out).Locations;
+ log('locations', locations);
+ const stackFrames = locations.map((location, frameId) => {
+ const uniqueStackFrameId = this.stackFrameHandles.create([goroutineId, frameId]);
+ return new StackFrame(
+ uniqueStackFrameId,
+ location.function ? location.function.name : '<unknown>',
+ location.file === '<autogenerated>' ? null : new Source(
+ path.basename(location.file),
+ this.toLocalPath(location.file)
+ ),
+ location.line,
+ 0
+ );
+ });
+
+ // Dump stacktrace into error logger
+ logError(`Last known immediate stacktrace (goroutine id ${goroutineId}):`);
+ let output = '';
+ stackFrames.forEach((stackFrame) => {
+ output = output.concat(`\t${stackFrame.source.path}:${stackFrame.line}\n`);
+ if (stackFrame.name) {
+ output = output.concat(`\t\t${stackFrame.name}\n`);
+ }
+ });
+ logError(output);
+ });
+ }
}
function random(low: number, high: number): number {
