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const Environment = @import("../env.zig");
pub const backtrace_state = struct_backtrace_state;
pub const struct_backtrace_state = opaque {};
pub const backtrace_error_callback = ?fn (
?*anyopaque,
[*c]const u8,
c_int,
) callconv(.C) void;
pub extern fn backtrace_create_state(
filename: [*c]const u8,
threaded: c_int,
error_callback: backtrace_error_callback,
data: ?*anyopaque,
) ?*struct_backtrace_state;
pub const backtrace_full_callback = ?fn (
?*anyopaque,
usize,
[*c]const u8,
c_int,
[*c]const u8,
) callconv(.C) c_int;
pub extern fn backtrace_full(
state: ?*struct_backtrace_state,
skip: c_int,
callback: backtrace_full_callback,
error_callback: backtrace_error_callback,
data: ?*anyopaque,
) c_int;
pub const backtrace_simple_callback = ?fn (?*anyopaque, usize) callconv(.C) c_int;
pub extern fn backtrace_simple(
state: ?*struct_backtrace_state,
skip: c_int,
callback: backtrace_simple_callback,
error_callback: backtrace_error_callback,
data: ?*anyopaque,
) c_int;
pub extern fn backtrace_print(state: ?*struct_backtrace_state, skip: c_int, [*c]anyopaque) void;
pub extern fn backtrace_pcinfo(
state: ?*struct_backtrace_state,
pc: usize,
callback: backtrace_full_callback,
error_callback: backtrace_error_callback,
data: ?*anyopaque,
) c_int;
pub const backtrace_syminfo_callback = ?fn (?*anyopaque, usize, [*c]const u8, usize, usize) callconv(.C) void;
pub extern fn backtrace_syminfo(
state: ?*struct_backtrace_state,
addr: usize,
callback: backtrace_syminfo_callback,
error_callback: backtrace_error_callback,
data: ?*anyopaque,
) c_int;
pub const BACKTRACE_SUPPORTED = @as(c_int, 1);
pub const BACKTRACE_USES_MALLOC = @as(c_int, 0);
pub const BACKTRACE_SUPPORTS_THREADS = @as(c_int, 1);
pub const BACKTRACE_SUPPORTS_DATA = @as(c_int, 1);
fn error_callback(data: *anyopaque, msg: [*c]u8, errnum: c_int) callconv(.C) void {
_ = data;
_ = msg;
_ = errnum;
}
pub const StackFrame = struct {
pc: usize,
filename: []const u8,
function_name: []const u8,
line_number: c_int,
};
pub const PrintCallback = fn (ctx: ?*anyopaque, frame: StackFrame) void;
var callback: PrintCallback = undefined;
var callback_ctx: ?*anyopaque = null;
const std = @import("std");
noinline fn full_callback(_: ?*anyopaque, pc: usize, filename: [*c]const u8, line_number: c_int, function_name: [*c]const u8) callconv(.C) c_int {
var stack_frame = StackFrame{
.pc = pc,
.line_number = line_number,
.function_name = if (function_name) |fn_| std.mem.span(fn_) else "",
.filename = if (filename) |fn_| std.mem.span(fn_) else "",
};
callback(callback_ctx, stack_frame);
return 0;
}
var state: ?*backtrace_state = null;
pub inline fn print() void {
if (Environment.isMac) return;
state = backtrace_create_state(null, BACKTRACE_SUPPORTS_THREADS, null, null);
_ = backtrace_full(state, 2, full_callback, null, null);
}
const builtin = @import("builtin");
const ErrorCallback = fn (sig: i32, addr: usize) void;
var on_error: ?ErrorCallback = null;
noinline fn sigaction_handler(sig: i32, info: *const std.os.siginfo_t, _: ?*const anyopaque) callconv(.C) void {
// Prevent recursive calls
os.sigaction(os.SIG.ABRT, null, null);
os.sigaction(os.SIG.BUS, null, null);
os.sigaction(os.SIG.FPE, null, null);
os.sigaction(os.SIG.ILL, null, null);
os.sigaction(os.SIG.SEGV, null, null);
os.sigaction(os.SIG.TRAP, null, null);
const addr = switch (comptime builtin.target.os.tag) {
.linux => @ptrToInt(info.fields.sigfault.addr),
.macos, .freebsd => @ptrToInt(info.addr),
.netbsd => @ptrToInt(info.info.reason.fault.addr),
.openbsd => @ptrToInt(info.data.fault.addr),
.solaris => @ptrToInt(info.reason.fault.addr),
else => unreachable,
};
if (on_error) |handle| handle(sig, addr);
}
pub fn reloadHandlers() void {
os.sigaction(os.SIG.ABRT, null, null);
os.sigaction(os.SIG.BUS, null, null);
os.sigaction(os.SIG.FPE, null, null);
os.sigaction(os.SIG.ILL, null, null);
os.sigaction(os.SIG.SEGV, null, null);
os.sigaction(os.SIG.TRAP, null, null);
var act = os.Sigaction{
.handler = .{ .sigaction = sigaction_handler },
.mask = os.empty_sigset,
.flags = (os.SA.SIGINFO | os.SA.RESTART | os.SA.RESETHAND),
};
os.sigaction(os.SIG.ABRT, &act, null);
os.sigaction(os.SIG.BUS, &act, null);
os.sigaction(os.SIG.FPE, &act, null);
os.sigaction(os.SIG.ILL, &act, null);
os.sigaction(os.SIG.SEGV, &act, null);
os.sigaction(os.SIG.TRAP, &act, null);
}
const os = std.os;
pub fn start(ctx: ?*anyopaque, callback_: PrintCallback, onError: ErrorCallback) void {
callback_ctx = ctx;
callback = callback_;
on_error = onError;
var act = os.Sigaction{
.handler = .{ .sigaction = sigaction_handler },
.mask = os.empty_sigset,
.flags = (os.SA.SIGINFO | os.SA.RESTART | os.SA.RESETHAND),
};
os.sigaction(os.SIG.ABRT, &act, null);
os.sigaction(os.SIG.BUS, &act, null);
os.sigaction(os.SIG.FPE, &act, null);
os.sigaction(os.SIG.ILL, &act, null);
os.sigaction(os.SIG.SEGV, &act, null);
os.sigaction(os.SIG.TRAP, &act, null);
}
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