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[driver] Implement the -fdebug-compilation-dir in a way that is compatible with 

gcc.  No test case included as I'm having problems finding a test case where
the inode/dev don't match.

llvm-svn: 180628
This commit is contained in:
Chad Rosier 2013-04-26 20:49:50 +00:00
parent 148fdf2ed1
commit a35d5a38fe
3 changed files with 21 additions and 14 deletions
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29
clang/lib/Driver/Tools.cpp
View File

@ -7,6 +7,9 @@
//
//===----------------------------------------------------------------------===//
#include <sys/param.h>
#include <sys/stat.h>
#include <unistd.h>
#include "Tools.h"
#include "InputInfo.h"
#include "SanitizerArgs.h"
@ -1776,14 +1779,24 @@ static bool shouldUseLeafFramePointer(const ArgList &Args,
/// If the PWD environment variable is set, add a CC1 option to specify the
/// debug compilation directory.
static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs) {
if (const char *pwd = ::getenv("PWD")) {
// GCC also verifies that stat(pwd) and stat(".") have the same inode
// number. Not doing those because stats are slow, but we could.
if (llvm::sys::path::is_absolute(pwd)) {
std::string CompDir = pwd;
CmdArgs.push_back("-fdebug-compilation-dir");
CmdArgs.push_back(Args.MakeArgString(CompDir));
}
struct stat StatPWDBuf, StatDotBuf;
const char *pwd;
if ((pwd = ::getenv("PWD")) != 0 &&
llvm::sys::path::is_absolute(pwd) &&
stat(pwd, &StatPWDBuf) == 0 &&
stat(".", &StatDotBuf) == 0 &&
StatPWDBuf.st_ino == StatDotBuf.st_ino &&
StatPWDBuf.st_dev == StatDotBuf.st_dev) {
CmdArgs.push_back("-fdebug-compilation-dir");
CmdArgs.push_back(Args.MakeArgString(pwd));
return;
}
// Fall back to using getcwd.
char cwd[MAXPATHLEN];
if (pwd && ::getcwd(cwd, MAXPATHLEN)) {
CmdArgs.push_back("-fdebug-compilation-dir");
CmdArgs.push_back(Args.MakeArgString(cwd));
}
}

3
clang/test/Driver/debug-comp-dir.S
View File

@ -1,9 +1,6 @@
// RUN: cd %S && %clang -### -g %s -c 2>&1 | FileCheck -check-prefix=CHECK-PWD %s
// CHECK-PWD: {{"-fdebug-compilation-dir" ".*Driver.*"}}
// RUN: env PWD=/foo %clang -### -g %s -c 2>&1 | FileCheck -check-prefix=CHECK-FOO %s
// CHECK-FOO: {{"-fdebug-compilation-dir" ".*foo"}}
// "PWD=/foo gcc" wouldn't necessarily work. You would need to pick a different
// path to the same directory (try a symlink).

3
clang/test/Driver/debug.c
View File

@ -1,9 +1,6 @@
// RUN: cd %S && %clang -### -g %s -c 2>&1 | FileCheck -check-prefix=CHECK-PWD %s
// CHECK-PWD: {{"-fdebug-compilation-dir" ".*Driver.*"}}
// RUN: env PWD=/foo %clang -### -g %s -c 2>&1 | FileCheck -check-prefix=CHECK-FOO %s
// CHECK-FOO: {{"-fdebug-compilation-dir" ".*foo"}}
// "PWD=/foo gcc" wouldn't necessarily work. You would need to pick a different
// path to the same directory (try a symlink).