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Auto merge of #113306 - tgross35:debuginfo-better-output, r=Mark-Simulacrum

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Update debuginfo test runner to provide more useful output

This change makes debuginfo tests more user friendly. Changes:

 -   Print all lines that fail to match the patterns instead of just the first
 -   Provide better error messages that also say what did match
 -   Strip leading whitespace from directives so they are not skipped if indented
 -   Improve documentation and improve nesting on some related items

 As an example, given the following intentional fail (and a few not shown):

 ```rust
 // from tests/debuginfo/rc_arc.rs

 // cdb-command:dx rc,d
 // cdb-check:rc,d             : 111 [Type: alloc::rc::Rc<i32>]
 // cdb-check:    [Reference count] : 11 [Type: core::cell FAIL::Cell<usize>]
 // cdb-check:    [Weak reference count] : 2 [Type: core::cell FAIL::Cell<usize>]
 ```

 The current output (tested in #113313) will show:

 ```
 2023-07-04T08:10:00.1939267Z ---- [debuginfo-cdb] tests\debuginfo\rc_arc.rs stdout ----
 2023-07-04T08:10:00.1942182Z
 2023-07-04T08:10:00.1957463Z error: line not found in debugger output:     [Reference count] : 11 [Type: core:: cell FAIL::Cell<usize>]
 2023-07-04T08:10:00.1958272Z status: exit code: 0
 ```

With this chane, you are able to see all failures in that check group, as well as what parts were successful. The output is now:

 ```
2023-07-04T09:45:57.2514224Z error: check directive(s) from `C:\a\rust\rust\tests\debuginfo\rc_arc.rs` not found in debugger output. errors:
2023-07-04T09:45:57.2514631Z     (rc_arc.rs:31) `    [Reference count] : 11 [Type: core::cell FAIL::Cell<usize>]`
2023-07-04T09:45:57.2514908Z     (rc_arc.rs:32) `    [Weak reference count] : 2 [Type: core::cell FAIL::Cell<usize>]`
2023-07-04T09:45:57.2515181Z     (rc_arc.rs:41) `    [Reference count] : 21 [Type: core::sync::atomic FAIL::AtomicUsize]`
2023-07-04T09:45:57.2515452Z     (rc_arc.rs:50) `dyn_rc,d         [Type: alloc::rc::Rc<dyn$<core::fmt FAIL::Debug> >]`
2023-07-04T09:45:57.2515695Z the following subset of check directive(s) was found successfully::
2023-07-04T09:45:57.2516080Z     (rc_arc.rs:30) `rc,d             : 111 [Type: alloc::rc::Rc<i32>]`
2023-07-04T09:45:57.2516312Z     (rc_arc.rs:35) `weak_rc,d        : 111 [Type: alloc::rc::Weak<i32>]`
2023-07-04T09:45:57.2516555Z     (rc_arc.rs:36) `    [Reference count] : 11 [Type: core::cell::Cell<usize>]`
2023-07-04T09:45:57.2516881Z     (rc_arc.rs:37) `    [Weak reference count] : 2 [Type: core::cell::Cell<usize>]`
...
 ```

 Which makes it easier to see what did and didn't succeed without manual comparison against the source test file.
This commit is contained in:
bors 2023-07-09 10:38:10 +00:00
commit ba37a69d30
3 changed files with 132 additions and 109 deletions
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11
src/tools/compiletest/src/header.rs
View File

@ -588,21 +588,22 @@ impl TestProps {
}
}
/// Extract a `(Option<line_config>, directive)` directive from a line if comment is present.
pub fn line_directive<'line>(
comment: &str,
ln: &'line str,
) -> Option<(Option<&'line str>, &'line str)> {
let ln = ln.trim_start();
if ln.starts_with(comment) {
let ln = ln[comment.len()..].trim_start();
if ln.starts_with('[') {
// A comment like `//[foo]` is specific to revision `foo`
if let Some(close_brace) = ln.find(']') {
let lncfg = &ln[1..close_brace];
let Some(close_brace) = ln.find(']') else {
panic!("malformed condition directive: expected `{}[foo]`, found `{}`", comment, ln);
};
let lncfg = &ln[1..close_brace];
Some((Some(lncfg), ln[(close_brace + 1)..].trim_start()))
} else {
panic!("malformed condition directive: expected `{}[foo]`, found `{}`", comment, ln)
}
} else {
Some((None, ln))
}

54
src/tools/compiletest/src/runtest.rs
View File

@ -41,7 +41,7 @@ use crate::extract_gdb_version;
use crate::is_android_gdb_target;
mod debugger;
use debugger::{check_debugger_output, DebuggerCommands};
use debugger::DebuggerCommands;
#[cfg(test)]
mod tests;
@ -997,16 +997,13 @@ impl<'test> TestCx<'test> {
};
// Parse debugger commands etc from test files
let DebuggerCommands { commands, check_lines, breakpoint_lines, .. } =
match DebuggerCommands::parse_from(
let dbg_cmds = DebuggerCommands::parse_from(
&self.testpaths.file,
self.config,
prefixes,
self.revision,
) {
Ok(cmds) => cmds,
Err(e) => self.fatal(&e),
};
)
.unwrap_or_else(|e| self.fatal(&e));
// https://docs.microsoft.com/en-us/windows-hardware/drivers/debugger/debugger-commands
let mut script_str = String::with_capacity(2048);
@ -1023,12 +1020,12 @@ impl<'test> TestCx<'test> {
// Set breakpoints on every line that contains the string "#break"
let source_file_name = self.testpaths.file.file_name().unwrap().to_string_lossy();
for line in &breakpoint_lines {
for line in &dbg_cmds.breakpoint_lines {
script_str.push_str(&format!("bp `{}:{}`\n", source_file_name, line));
}
// Append the other `cdb-command:`s
for line in &commands {
for line in &dbg_cmds.commands {
script_str.push_str(line);
script_str.push_str("\n");
}
@ -1058,7 +1055,7 @@ impl<'test> TestCx<'test> {
self.fatal_proc_rec("Error while running CDB", &debugger_run_result);
}
if let Err(e) = check_debugger_output(&debugger_run_result, &check_lines) {
if let Err(e) = dbg_cmds.check_output(&debugger_run_result) {
self.fatal_proc_rec(&e, &debugger_run_result);
}
}
@ -1088,17 +1085,14 @@ impl<'test> TestCx<'test> {
PREFIXES
};
let DebuggerCommands { commands, check_lines, breakpoint_lines } =
match DebuggerCommands::parse_from(
let dbg_cmds = DebuggerCommands::parse_from(
&self.testpaths.file,
self.config,
prefixes,
self.revision,
) {
Ok(cmds) => cmds,
Err(e) => self.fatal(&e),
};
let mut cmds = commands.join("\n");
)
.unwrap_or_else(|e| self.fatal(&e));
let mut cmds = dbg_cmds.commands.join("\n");
// compile test file (it should have 'compile-flags:-g' in the header)
let should_run = self.run_if_enabled();
@ -1132,13 +1126,14 @@ impl<'test> TestCx<'test> {
./{}/stage2/lib/rustlib/{}/lib/\n",
self.config.host, self.config.target
));
for line in &breakpoint_lines {
for line in &dbg_cmds.breakpoint_lines {
script_str.push_str(
&format!(
format!(
"break {:?}:{}\n",
self.testpaths.file.file_name().unwrap().to_string_lossy(),
*line
)[..],
)
.as_str(),
);
}
script_str.push_str(&cmds);
@ -1279,7 +1274,7 @@ impl<'test> TestCx<'test> {
}
// Add line breakpoints
for line in &breakpoint_lines {
for line in &dbg_cmds.breakpoint_lines {
script_str.push_str(&format!(
"break '{}':{}\n",
self.testpaths.file.file_name().unwrap().to_string_lossy(),
@ -1315,7 +1310,7 @@ impl<'test> TestCx<'test> {
self.fatal_proc_rec("gdb failed to execute", &debugger_run_result);
}
if let Err(e) = check_debugger_output(&debugger_run_result, &check_lines) {
if let Err(e) = dbg_cmds.check_output(&debugger_run_result) {
self.fatal_proc_rec(&e, &debugger_run_result);
}
}
@ -1372,16 +1367,13 @@ impl<'test> TestCx<'test> {
};
// Parse debugger commands etc from test files
let DebuggerCommands { commands, check_lines, breakpoint_lines, .. } =
match DebuggerCommands::parse_from(
let dbg_cmds = DebuggerCommands::parse_from(
&self.testpaths.file,
self.config,
prefixes,
self.revision,
) {
Ok(cmds) => cmds,
Err(e) => self.fatal(&e),
};
)
.unwrap_or_else(|e| self.fatal(&e));
// Write debugger script:
// We don't want to hang when calling `quit` while the process is still running
@ -1430,7 +1422,7 @@ impl<'test> TestCx<'test> {
// Set breakpoints on every line that contains the string "#break"
let source_file_name = self.testpaths.file.file_name().unwrap().to_string_lossy();
for line in &breakpoint_lines {
for line in &dbg_cmds.breakpoint_lines {
script_str.push_str(&format!(
"breakpoint set --file '{}' --line {}\n",
source_file_name, line
@ -1438,7 +1430,7 @@ impl<'test> TestCx<'test> {
}
// Append the other commands
for line in &commands {
for line in &dbg_cmds.commands {
script_str.push_str(line);
script_str.push_str("\n");
}
@ -1458,7 +1450,7 @@ impl<'test> TestCx<'test> {
self.fatal_proc_rec("Error while running LLDB", &debugger_run_result);
}
if let Err(e) = check_debugger_output(&debugger_run_result, &check_lines) {
if let Err(e) = dbg_cmds.check_output(&debugger_run_result) {
self.fatal_proc_rec(&e, &debugger_run_result);
}
}

110
src/tools/compiletest/src/runtest/debugger.rs
View File

@ -2,18 +2,25 @@ use crate::common::Config;
use crate::header::line_directive;
use crate::runtest::ProcRes;
use std::fmt::Write;
use std::fs::File;
use std::io::{BufRead, BufReader};
use std::path::Path;
use std::path::{Path, PathBuf};
/// Representation of information to invoke a debugger and check its output
pub(super) struct DebuggerCommands {
/// Commands for the debuuger
pub commands: Vec<String>,
pub check_lines: Vec<String>,
/// Lines to insert breakpoints at
pub breakpoint_lines: Vec<usize>,
/// Contains the source line number to check and the line itself
check_lines: Vec<(usize, String)>,
/// Source file name
file: PathBuf,
}
impl DebuggerCommands {
pub(super) fn parse_from(
pub fn parse_from(
file: &Path,
config: &Config,
debugger_prefixes: &[&str],
@ -21,7 +28,7 @@ impl DebuggerCommands {
) -> Result<Self, String> {
let directives = debugger_prefixes
.iter()
.map(|prefix| (format!("{}-command", prefix), format!("{}-check", prefix)))
.map(|prefix| (format!("{prefix}-command"), format!("{prefix}-check")))
.collect::<Vec<_>>();
let mut breakpoint_lines = vec![];
@ -29,10 +36,9 @@ impl DebuggerCommands {
let mut check_lines = vec![];
let mut counter = 0;
let reader = BufReader::new(File::open(file).unwrap());
for line in reader.lines() {
for (line_no, line) in reader.lines().enumerate() {
counter += 1;
match line {
Ok(line) => {
let line = line.map_err(|e| format!("Error while parsing debugger commands: {}", e))?;
let (lnrev, line) = line_directive("//", &line).unwrap_or((None, &line));
// Skip any revision specific directive that doesn't match the current
@ -52,40 +58,66 @@ impl DebuggerCommands {
config
.parse_name_value_directive(&line, check_directive)
.map(|cmd| check_lines.push(cmd));
}
}
Err(e) => return Err(format!("Error while parsing debugger commands: {}", e)),
.map(|cmd| check_lines.push((line_no, cmd)));
}
}
Ok(Self { commands, check_lines, breakpoint_lines })
}
Ok(Self { commands, breakpoint_lines, check_lines, file: file.to_owned() })
}
pub(super) fn check_debugger_output(
debugger_run_result: &ProcRes,
check_lines: &[String],
) -> Result<(), String> {
let num_check_lines = check_lines.len();
/// Given debugger output and lines to check, ensure that every line is
/// contained in the debugger output. The check lines need to be found in
/// order, but there can be extra lines between.
pub fn check_output(&self, debugger_run_result: &ProcRes) -> Result<(), String> {
// (src_lineno, ck_line) that we did find
let mut found = vec![];
// (src_lineno, ck_line) that we couldn't find
let mut missing = vec![];
// We can find our any current match anywhere after our last match
let mut last_idx = 0;
let dbg_lines: Vec<&str> = debugger_run_result.stdout.lines().collect();
let mut check_line_index = 0;
for line in debugger_run_result.stdout.lines() {
if check_line_index >= num_check_lines {
break;
}
if check_single_line(line, &(check_lines[check_line_index])[..]) {
check_line_index += 1;
}
}
if check_line_index != num_check_lines && num_check_lines > 0 {
Err(format!("line not found in debugger output: {}", check_lines[check_line_index]))
for (src_lineno, ck_line) in &self.check_lines {
if let Some(offset) = dbg_lines
.iter()
.skip(last_idx)
.position(|out_line| check_single_line(out_line, &ck_line))
{
last_idx += offset;
found.push((src_lineno, dbg_lines[last_idx]));
} else {
Ok(())
missing.push((src_lineno, ck_line));
}
}
if missing.is_empty() {
Ok(())
} else {
let fname = self.file.file_name().unwrap().to_string_lossy();
let mut msg = format!(
"check directive(s) from `{}` not found in debugger output. errors:",
self.file.display()
);
for (src_lineno, err_line) in missing {
write!(msg, "\n ({fname}:{num}) `{err_line}`", num = src_lineno + 1).unwrap();
}
if !found.is_empty() {
let init = "\nthe following subset of check directive(s) was found successfully:";
msg.push_str(init);
for (src_lineno, found_line) in found {
write!(msg, "\n ({fname}:{num}) `{found_line}`", num = src_lineno + 1)
.unwrap();
}
}
Err(msg)
}
}
}
/// Check that the pattern in `check_line` applies to `line`. Returns `true` if they do match.
fn check_single_line(line: &str, check_line: &str) -> bool {
// Allow check lines to leave parts unspecified (e.g., uninitialized
// bits in the wrong case of an enum) with the notation "[...]".
@ -101,22 +133,20 @@ fn check_single_line(line: &str, check_line: &str) -> bool {
}
let (mut rest, first_fragment) = if can_start_anywhere {
match line.find(check_fragments[0]) {
Some(pos) => (&line[pos + check_fragments[0].len()..], 1),
None => return false,
}
let Some(pos) = line.find(check_fragments[0]) else {
return false;
};
(&line[pos + check_fragments[0].len()..], 1)
} else {
(line, 0)
};
for current_fragment in &check_fragments[first_fragment..] {
match rest.find(current_fragment) {
Some(pos) => {
let Some(pos) = rest.find(current_fragment) else {
return false;
};
rest = &rest[pos + current_fragment.len()..];
}
None => return false,
}
}
if !can_end_anywhere && !rest.is_empty() { false } else { true }
}