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Capture the stack trace on the crash handler report

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This commit is contained in:
Karl Seguin
2026-01-23 12:09:47 +08:00
parent 3a0699fc1d
commit 6d23d91aa5
1 changed files with 32 additions and 14 deletions
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46
src/crash_handler.zig
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@@ -54,7 +54,7 @@ pub noinline fn crash(
std.debug.dumpCurrentStackTraceToWriter(begin_addr, writer) catch abort();
}
report(reason) catch {};
report(reason, begin_addr) catch {};
},
1 => {
panic_level = 2;
@@ -68,7 +68,7 @@ pub noinline fn crash(
abort();
}
fn report(reason: []const u8) !void {
fn report(reason: []const u8, begin_addr: usize) !void {
if (@import("telemetry/telemetry.zig").isDisabled()) {
return;
}
@@ -76,24 +76,42 @@ fn report(reason: []const u8) !void {
var curl_path: [2048]u8 = undefined;
const curl_path_len = curlPath(&curl_path) orelse return;
var args_buffer: [4096]u8 = undefined;
var writer: std.Io.Writer = .fixed(&args_buffer);
try writer.print("https://crash.lightpanda.io/c?v={s}&r=", .{lp.build_config.git_commit});
for (reason) |b| {
switch (b) {
'A'...'Z', 'a'...'z', '0'...'9', '-', '.', '_' => try writer.writeByte(b),
' ' => try writer.writeByte('+'),
else => try writer.writeByte('!'), // some weird character, that we shouldn't have, but that'll we'll replace with a weird (bur url-safe) character
var url_buffer: [4096]u8 = undefined;
const url = blk: {
var writer: std.Io.Writer = .fixed(&url_buffer);
try writer.print("http://localhost:1234/c?v={s}&r=", .{lp.build_config.git_commit});
for (reason) |b| {
switch (b) {
'A'...'Z', 'a'...'z', '0'...'9', '-', '.', '_' => try writer.writeByte(b),
' ' => try writer.writeByte('+'),
else => try writer.writeByte('!'), // some weird character, that we shouldn't have, but that'll we'll replace with a weird (bur url-safe) character
}
}
}
try writer.writeByte(0);
const url = writer.buffered();
try writer.writeByte(0);
break :blk writer.buffered();
};
var stack_buffer: [4096]u8 = undefined;
const stack = blk: {
var writer: std.Io.Writer = .fixed(stack_buffer[0..4095]); // reserve 1 space
std.debug.dumpCurrentStackTraceToWriter(begin_addr, &writer) catch {};
var written = writer.buffered();
if (written.len == 0) {
break :blk "???";
}
// overwrite the last character with our null terminator, safest since
// our buffer could be full at this point
written[written.len] = 0;
break :blk written[0..written.len + 1];
};
var argv = [_:null]?[*:0]const u8{
curl_path[0..curl_path_len :0],
"-fsSL",
"-H", "Content-Type: application/octet-stream",
"--data-binary",
stack[0..stack.len - 1 : 0],
url[0 .. url.len - 1 :0],
};