llvm-project/clang/test/Modules/crash-vfs-path-symlink-comp...

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// REQUIRES: crash-recovery, shell
// FIXME: This XFAIL is cargo-culted from crash-report.c. Do we need it?
// XFAIL: mingw32
// Test that clang is capable of collecting the right header files in the
// crash reproducer if there's a symbolic link component in the path.
// RUN: rm -rf %t
// RUN: mkdir -p %t/i %t/m %t %t/sysroot
// RUN: cp -a %S/Inputs/crash-recovery/usr %t/i/
// RUN: ln -s include/tcl-private %t/i/usr/x
// RUN: not env FORCE_CLANG_DIAGNOSTICS_CRASH= TMPDIR=%t TEMP=%t TMP=%t \
// RUN: %clang -fsyntax-only %s -I %/t/i -isysroot %/t/sysroot/ \
// RUN: -fmodules -fmodules-cache-path=%t/m/ 2>&1 | FileCheck %s
// RUN: FileCheck --check-prefix=CHECKSRC %s -input-file %t/crash-vfs-*.m
// RUN: FileCheck --check-prefix=CHECKSH %s -input-file %t/crash-vfs-*.sh
// RUN: FileCheck --check-prefix=CHECKYAML %s -input-file \
// RUN: %t/crash-vfs-*.cache/vfs/vfs.yaml
// RUN: find %t/crash-vfs-*.cache/vfs | \
// RUN: grep "usr/include/stdio.h" | count 1
#include "usr/x/../stdio.h"
// CHECK: Preprocessed source(s) and associated run script(s) are located at:
// CHECK-NEXT: note: diagnostic msg: {{.*}}.m
// CHECK-NEXT: note: diagnostic msg: {{.*}}.cache
// CHECKSRC: @import cstd.stdio;
// CHECKSH: # Crash reproducer
// CHECKSH-NEXT: # Driver args: "-fsyntax-only"
// CHECKSH-NEXT: # Original command: {{.*$}}
// CHECKSH-NEXT: "-cc1"
// CHECKSH: "-isysroot" "{{[^"]*}}/sysroot/"
// CHECKSH-NOT: "-fmodules-cache-path="
// CHECKSH: "crash-vfs-{{[^ ]*}}.m"
// CHECKSH: "-ivfsoverlay" "crash-vfs-{{[^ ]*}}.cache/vfs/vfs.yaml"
// CHECKSH: "-fmodules-cache-path=crash-vfs-{{[^ ]*}}.cache/repro-modules"
// CHECKYAML: 'case-sensitive':
// CHECKYAML-NEXT: 'use-external-names': 'false',
// CHECKYAML-NEXT: 'overlay-relative': 'true',
// CHECKYAML: 'type': 'directory'
// CHECKYAML: 'name': "/[[PATH:.*]]/i/usr",
// CHECKYAML-NEXT: 'contents': [
// CHECKYAML-NEXT: {
// CHECKYAML-NEXT: 'type': 'file',
// CHECKYAML-NEXT: 'name': "module.map",
Reapply [2] [VFS] Add 'overlay-relative' field to YAML files This reapplies r261552 and r263748. Fixed testcase to reapply. The VFS overlay mapping between virtual paths and real paths is done through the 'external-contents' entries in YAML files, which contains hardcoded paths to the real files. When a module compilation crashes, headers are dumped into <name>.cache/vfs directory and are mapped via the <name>.cache/vfs/vfs.yaml. The script generated for reproduction uses -ivfsoverlay pointing to file to gather the mapping between virtual paths and files inside <name>.cache/vfs. Currently, we are only capable of reproducing such crashes in the same machine as they happen, because of the hardcoded paths in 'external-contents'. To be able to reproduce a crash in another machine, this patch introduces a new option in the VFS yaml file called 'overlay-relative'. When it's equal to 'true' it means that the provided path to the YAML file through the -ivfsoverlay option should also be used to prefix the final path for every 'external-contents'. Example, given the invocation snippet "... -ivfsoverlay <name>.cache/vfs/vfs.yaml" and the following entry in the yaml file: "overlay-relative": "true", "roots": [ ... "type": "directory", "name": "/usr/include", "contents": [ { "type": "file", "name": "stdio.h", "external-contents": "/usr/include/stdio.h" }, ... Here, a file manager request for virtual "/usr/include/stdio.h", that will map into real path "/<absolute_path_to>/<name>.cache/vfs/usr/include/stdio.h. This is a useful feature for debugging module crashes in machines other than the one where the error happened. Differential Revision: http://reviews.llvm.org/D17457 rdar://problem/24499339 llvm-svn: 263893
2016-03-20 10:08:48 +08:00
// CHECKYAML-NEXT: 'external-contents': "/[[PATH]]/i/usr/include/module.map"
// CHECKYAML-NEXT: },
// Test that by using the previous generated YAML file clang is able to find the
// right files inside the overlay and map the virtual request for a path that
// previously contained a symlink to work. To make sure of this, wipe out the
// %/t/i directory containing the symlink component.
// RUN: rm -rf %/t/i
// RUN: unset FORCE_CLANG_DIAGNOSTICS_CRASH
// RUN: %clang -E %s -I %/t/i -isysroot %/t/sysroot/ \
// RUN: -ivfsoverlay %t/crash-vfs-*.cache/vfs/vfs.yaml -fmodules \
// RUN: -fmodules-cache-path=%t/m/ 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECKOVERLAY
// CHECKOVERLAY: @import cstd.stdio; /* clang -E: implicit import for "/{{[^ ].*}}/i/usr/x/../stdio.h" */