llvm-utils.c File Reference

#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <linux/err.h>
#include "debug.h"
#include "llvm-utils.h"
#include "config.h"
#include "util.h"
#include <sys/wait.h>
#include <subcmd/exec-cmd.h>

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Macros
#define	CLANG_BPF_CMD_DEFAULT_TEMPLATE
#define	READ_SIZE   4096

Functions
int	perf_llvm_config (const char *var, const char *value)
static int	search_program (const char *def, const char *name, char *output)
static int	read_from_pipe (const char *cmd, void **p_buf, size_t *p_read_sz)
static void	force_set_env (const char *var, const char *value)
static void	version_notice (void)
static int	detect_kbuild_dir (char **kbuild_dir)
void	llvm__get_kbuild_opts (char **kbuild_dir, char **kbuild_include_opts)
int	llvm__get_nr_cpus (void)
void	llvm__dump_obj (const char *path, void *obj_buf, size_t size)
int	llvm__compile_bpf (const char *path, void **p_obj_buf, size_t *p_obj_buf_sz)
int	llvm__search_clang (void)

Variables
struct llvm_param	llvm_param
static const char *	kinc_fetch_script

Macro Definition Documentation

CLANG_BPF_CMD_DEFAULT_TEMPLATE

#define CLANG_BPF_CMD_DEFAULT_TEMPLATE

Value:

"$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\
        "-DLINUX_VERSION_CODE=$LINUX_VERSION_CODE " \
        "$CLANG_OPTIONS $KERNEL_INC_OPTIONS $PERF_BPF_INC_OPTIONS " \
        "-Wno-unused-value -Wno-pointer-sign "      \
        "-working-directory $WORKING_DIR "      \
        "-c \"$CLANG_SOURCE\" -target bpf -O2 -o -"

Definition at line 19 of file llvm-utils.c.

READ_SIZE

#define READ_SIZE   4096

Definition at line 104 of file llvm-utils.c.

Function Documentation

detect_kbuild_dir()

static int detect_kbuild_dir ( char **  kbuild_dir )

static

Definition at line 223 of file llvm-utils.c.

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force_set_env()

static void force_set_env ( const char *  var, const char *  value  )

inlinestatic

Definition at line 191 of file llvm-utils.c.

llvm__compile_bpf()

int llvm__compile_bpf	(	const char *	path,
		void **	p_obj_buf,
		size_t *	p_obj_buf_sz
	)

Definition at line 424 of file llvm-utils.c.

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llvm__dump_obj()

void llvm__dump_obj	(	const char *	path,
		void *	obj_buf,
		size_t	size
	)

Definition at line 389 of file llvm-utils.c.

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llvm__get_kbuild_opts()

void llvm__get_kbuild_opts	(	char **	kbuild_dir,
		char **	kbuild_include_opts
	)

Definition at line 291 of file llvm-utils.c.

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llvm__get_nr_cpus()

int llvm__get_nr_cpus

(

void

)

Definition at line 371 of file llvm-utils.c.

llvm__search_clang()

int llvm__search_clang

(

void

)

Definition at line 545 of file llvm-utils.c.

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perf_llvm_config()

int perf_llvm_config	(	const char *	var,
		const char *	value
	)

Definition at line 36 of file llvm-utils.c.

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read_from_pipe()

static int read_from_pipe ( const char *  cmd, void **  p_buf, size_t *  p_read_sz  )

static

Definition at line 106 of file llvm-utils.c.

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search_program()

static int search_program ( const char *  def, const char *  name, char *  output  )

static

Definition at line 63 of file llvm-utils.c.

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version_notice()

static void version_notice ( void  )

static

Definition at line 203 of file llvm-utils.c.

Variable Documentation

kinc_fetch_script

const char* kinc_fetch_script

static

Initial value:

=
"#!/usr/bin/env sh\n"
"if ! test -d \"$KBUILD_DIR\"\n"
"then\n"
"   exit -1\n"
"fi\n"
"if ! test -f \"$KBUILD_DIR/include/generated/autoconf.h\"\n"
"then\n"
"   exit -1\n"
"fi\n"
"TMPDIR=`mktemp -d`\n"
"if test -z \"$TMPDIR\"\n"
"then\n"
"    exit -1\n"
"fi\n"
"cat << EOF > $TMPDIR/Makefile\n"
"obj-y := dummy.o\n"
"\\$(obj)/%.o: \\$(src)/%.c\n"
"\t@echo -n \"\\$(NOSTDINC_FLAGS) \\$(LINUXINCLUDE) \\$(EXTRA_CFLAGS)\"\n"
"EOF\n"
"touch $TMPDIR/dummy.c\n"
"make -s -C $KBUILD_DIR M=$TMPDIR $KBUILD_OPTS dummy.o 2>/dev/null\n"
"RET=$?\n"
"rm -rf $TMPDIR\n"
"exit $RET\n"

Definition at line 265 of file llvm-utils.c.

llvm_param

struct llvm_param llvm_param

Initial value:

= {
    .clang_path = "clang",
    .clang_bpf_cmd_template = CLANG_BPF_CMD_DEFAULT_TEMPLATE,
    .clang_opt = NULL,
    .kbuild_dir = NULL,
    .kbuild_opts = NULL,
    .user_set_param = false,
}

Definition at line 27 of file llvm-utils.c.