diff options
author | Chris Lattner <sabre@nondot.org> | 2004-06-01 23:48:45 +0000 |
---|---|---|
committer | Chris Lattner <sabre@nondot.org> | 2004-06-01 23:48:45 +0000 |
commit | 4c6d124efa433347c7280d4a075d954bd0231a78 (patch) | |
tree | a761e81fb6040a44d15703af19add6f57dfbd9c2 /tools/llvm-stub | |
parent | 6db8c2c5ca0c28e95acfb276f383fa45459044ae (diff) | |
download | llvm-4c6d124efa433347c7280d4a075d954bd0231a78.tar.gz llvm-4c6d124efa433347c7280d4a075d954bd0231a78.tar.bz2 llvm-4c6d124efa433347c7280d4a075d954bd0231a78.tar.xz |
Initial checkin of a stub executable that can be used by gccld to forward to
bytecode files on systems that don't support #!/bin/sh natively (ie, win32).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13937 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-stub')
-rw-r--r-- | tools/llvm-stub/Makefile | 13 | ||||
-rw-r--r-- | tools/llvm-stub/llvm-stub.c | 51 |
2 files changed, 64 insertions, 0 deletions
diff --git a/tools/llvm-stub/Makefile b/tools/llvm-stub/Makefile new file mode 100644 index 0000000000..befcb6cc2e --- /dev/null +++ b/tools/llvm-stub/Makefile @@ -0,0 +1,13 @@ +##===- tools/llvm-stub/Makefile ----------------------------*- Makefile -*-===## +# +# The LLVM Compiler Infrastructure +# +# This file was developed by the LLVM research group and is distributed under +# the University of Illinois Open Source License. See LICENSE.TXT for details. +# +##===----------------------------------------------------------------------===## + +LEVEL = ../.. +TOOLNAME = llvm-stub +include $(LEVEL)/Makefile.common + diff --git a/tools/llvm-stub/llvm-stub.c b/tools/llvm-stub/llvm-stub.c new file mode 100644 index 0000000000..7009c8dee1 --- /dev/null +++ b/tools/llvm-stub/llvm-stub.c @@ -0,0 +1,51 @@ +/*===- llvm-stub.c - Stub executable to run llvm bytecode files -----------===// +// +// The LLVM Compiler Infrastructure +// +// This file was developed by the LLVM research group and is distributed under +// the University of Illinois Open Source License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This tool is used by the gccld program to enable transparent execution of +// bytecode files by the user. Specifically, gccld outputs two files when asked +// to compile a <program> file: +// 1. It outputs the LLVM bytecode file to <program>.bc +// 2. It outputs a stub executable that runs lli on <program>.bc +// +// This allows the end user to just say ./<program> and have the JIT executed +// automatically. On unix, the stub executable emitted is actually a bourne +// shell script that does the forwarding. Windows doesn't not like #!/bin/sh +// programs in .exe files, so we make it an actual program, defined here. +// +//===----------------------------------------------------------------------===*/ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "Config/unistd.h" /* provides definition of execve */ + +int main(int argc, char** argv) { + const char *Interp = getenv("LLVMINTERP"); + const char **Args; + if (Interp == 0) Interp = "lli"; + + /* Set up the command line options to pass to the JIT. */ + Args = (const char**)malloc(sizeof(char*) * (argc+2)); + /* argv[0] is the JIT */ + Args[0] = Interp; + /* argv[1] is argv[0] + ".bc". */ + Args[1] = strcat(strcpy((char*)malloc(strlen(argv[0])+4), argv[0]), ".bc"); + + /* The rest of the args are as before. */ + memcpy(Args+2, argv+1, sizeof(char*)*argc); + + /* Run the JIT. */ + execvp(Interp, (char *const*)Args); + + /* if _execv returns, the JIT could not be started. */ + fprintf(stderr, "Could not execute the LLVM JIT. Either add 'lli' to your" + " path, or set the\ninterpreter you want to use in the LLVMINTERP " + "environment variable.\n"); + return 1; +} |