94 lines
2.8 KiB
Rust
94 lines
2.8 KiB
Rust
use self::InternalDebugLocation::*;
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use super::utils::{debug_context, span_start};
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use super::metadata::UNKNOWN_COLUMN_NUMBER;
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use rustc_codegen_ssa::debuginfo::FunctionDebugContext;
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use crate::llvm;
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use crate::llvm::debuginfo::DIScope;
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use crate::builder::Builder;
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use rustc_codegen_ssa::traits::*;
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use libc::c_uint;
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use syntax_pos::{Span, Pos};
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/// Sets the current debug location at the beginning of the span.
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///
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/// Maps to a call to llvm::LLVMSetCurrentDebugLocation(...).
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pub fn set_source_location<D>(
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debug_context: &FunctionDebugContext<D>,
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bx: &Builder<'_, 'll, '_>,
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scope: Option<&'ll DIScope>,
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span: Span,
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) {
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let function_debug_context = match *debug_context {
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FunctionDebugContext::DebugInfoDisabled => return,
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FunctionDebugContext::FunctionWithoutDebugInfo => {
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set_debug_location(bx, UnknownLocation);
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return;
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}
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FunctionDebugContext::RegularContext(ref data) => data
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};
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let dbg_loc = if function_debug_context.source_locations_enabled.get() {
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debug!("set_source_location: {}", bx.sess().source_map().span_to_string(span));
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let loc = span_start(bx.cx(), span);
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InternalDebugLocation::new(scope.unwrap(), loc.line, loc.col.to_usize())
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} else {
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UnknownLocation
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};
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set_debug_location(bx, dbg_loc);
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}
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#[derive(Copy, Clone, PartialEq)]
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pub enum InternalDebugLocation<'ll> {
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KnownLocation { scope: &'ll DIScope, line: usize, col: usize },
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UnknownLocation
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}
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impl InternalDebugLocation<'ll> {
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pub fn new(scope: &'ll DIScope, line: usize, col: usize) -> Self {
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KnownLocation {
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scope,
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line,
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col,
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}
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}
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}
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pub fn set_debug_location(
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bx: &Builder<'_, 'll, '_>,
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debug_location: InternalDebugLocation<'ll>
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) {
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let metadata_node = match debug_location {
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KnownLocation { scope, line, col } => {
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// For MSVC, set the column number to zero.
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// Otherwise, emit it. This mimics clang behaviour.
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// See discussion in https://github.com/rust-lang/rust/issues/42921
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let col_used = if bx.sess().target.target.options.is_like_msvc {
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UNKNOWN_COLUMN_NUMBER
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} else {
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col as c_uint
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};
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debug!("setting debug location to {} {}", line, col);
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unsafe {
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Some(llvm::LLVMRustDIBuilderCreateDebugLocation(
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debug_context(bx.cx()).llcontext,
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line as c_uint,
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col_used,
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scope,
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None))
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}
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}
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UnknownLocation => {
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debug!("clearing debug location ");
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None
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}
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};
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unsafe {
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llvm::LLVMSetCurrentDebugLocation(bx.llbuilder, metadata_node);
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}
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}
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