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/**********************************************************/
/* apimagic: cparser-based API normalization utility */
/* Copyright (C) 2015--2021 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.APIMAGIC. */
/**********************************************************/
#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#include <cparser/driver/driver.h>
#include <cparser/driver/c_driver.h>
#include <apimagic/apimagic.h>
#include "apimagic_driver_impl.h"
#include "apimagic_errinfo_impl.h"
static int amgc_free_unit_ctx_impl(struct amgc_unit_ctx_impl * ctx, int ret)
{
if (ctx) {
if (ctx->entities)
amgc_free_unit_entities(ctx->entities);
free(ctx);
}
return ret;
}
static int amgc_stdin_to_tmp(const struct amgc_driver_ctx * dctx)
{
struct amgc_driver_ctx_impl * ictx;
uintptr_t addr;
int fdtmp;
ssize_t ret;
ssize_t cnt;
char * ch;
char buf[4096];
char template[] = "/tmp/amgc_stdin_to_tmp_XXXXXX";
addr = (uintptr_t)dctx - offsetof(struct amgc_driver_ctx_impl,ctx);
ictx = (struct amgc_driver_ctx_impl *)addr;
if (ictx->fdtmpin >= 0)
return dup(ictx->fdtmpin);
if ((fdtmp = mkstemp(template)) < 0)
return -1;
if ((ictx->fdtmpin = dup(fdtmp)) < 0) {
close(fdtmp);
return -1;
}
for (;;) {
ret = read(0,buf,sizeof(buf)-1);
while ((ret < 0) && (errno == EINTR))
ret = read(0,buf,sizeof(buf)-1);
if (ret < 0) {
close(fdtmp);
return -1;
} else if (ret == 0) {
return fdtmp;
} else {
ch = buf;
cnt = ret;
ret = 0;
for (; cnt; ) {
ret = write(fdtmp,ch,cnt);
while ((ret < 0) && (errno == EINTR))
ret = write(fdtmp,ch,cnt);
if (ret < 0) {
close(fdtmp);
return -1;
}
ch += ret;
cnt -= ret;
}
}
}
}
static bool amgc_cparser_no_op(
compilation_env_t * env,
compilation_unit_t * unit)
{
(void)env;
(void)unit;
return true;
}
static void amgc_init_cparser_unit(void)
{
set_default_handlers();
/* parse only */
set_unit_handler(COMPILATION_UNIT_AST,
build_firm_ir,true);
/* assign no-op handler */
set_unit_handler(COMPILATION_UNIT_PREPROCESSED_ASSEMBLER,
amgc_cparser_no_op,true);
set_unit_handler(COMPILATION_UNIT_OBJECT,
amgc_cparser_no_op,true);
}
int amgc_get_unit_ctx(
const struct amgc_driver_ctx * dctx,
const char * path,
struct amgc_unit_ctx ** pctx)
{
struct amgc_unit_ctx_impl * ctx;
int fd;
amgc_init_cparser_unit();
if (!dctx)
return AMGC_CUSTOM_ERROR(
dctx,AMGC_ERR_NULL_CONTEXT);
else if (!(ctx = calloc(1,sizeof(*ctx))))
return AMGC_SYSTEM_ERROR(dctx);
amgc_driver_set_ectx(
dctx,0,path);
if (strcmp(path,"-"))
fd = -1;
else if ((fd = amgc_stdin_to_tmp(dctx)) < 0)
return amgc_free_unit_ctx_impl(
ctx,AMGC_SYSTEM_ERROR(dctx));
else if (lseek(fd,0,SEEK_SET < 0))
return amgc_free_unit_ctx_impl(
ctx,AMGC_NESTED_ERROR(dctx));
else if (!(ctx->ccunit.input = fdopen(fd,"r")))
return amgc_free_unit_ctx_impl(
ctx,AMGC_FILE_ERROR(dctx));
/* compilation unit */
ctx->ccunit.name = path;
ctx->ccunit.original_name = path;
ctx->ccunit.type = COMPILATION_UNIT_C;
ctx->ccunit.standard = dctx->cctx->std;
/* parse, generate ast, generate ir */
if ((process_unit(ctx->cctx.ccenv,&ctx->ccunit)) == false) {
if (ctx->ccunit.input)
fclose(ctx->ccunit.input);
return amgc_free_unit_ctx_impl(
ctx,AMGC_CUSTOM_ERROR(dctx,AMGC_ERR_FLOW_ERROR));
}
memcpy(&ctx->cctx,dctx->cctx,
sizeof(ctx->cctx));
ctx->dctx = dctx;
ctx->path = path;
ctx->uctx.path = &ctx->path;
ctx->uctx.cctx = &ctx->cctx;
ctx->uctx.meta = &ctx->meta;
ctx->uctx.ccunit = &ctx->ccunit;
if (amgc_get_unit_entities(&ctx->uctx,&ctx->meta,&ctx->entities))
return amgc_free_unit_ctx_impl(
ctx,AMGC_CUSTOM_ERROR(dctx,AMGC_ERR_FLOW_ERROR));
ctx->uctx.entities = ctx->entities;
*pctx = &ctx->uctx;
return 0;
}
void amgc_free_unit_ctx(struct amgc_unit_ctx * ctx)
{
struct amgc_unit_ctx_impl * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct amgc_unit_ctx_impl,uctx);
ictx = (struct amgc_unit_ctx_impl *)addr;
amgc_free_unit_ctx_impl(ictx,0);
}
}
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