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mozilla-history/config/gtscc.c

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59 KiB
C
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/* */
/*
*--------------------------------------------------------------------------
*
*
*
*--------------------------------------------------------------------------
*
* gtscc - Global To Static C/C++ compiler driver.
*
* Syntax:
*
* gtscc [options] -c file.cpp ...
* gtscc [options] file.o ... libxx.a ...
*
* gtscc is a compiler and linker driver/wrapper for Irix only.
* gtscc takes all compiler options and passes them onto the Irix
* cc/CC compiler/linker.
* Typically, gtscc is used in two phases. Phase one is during compilation.
* gtscc, the compiler, converts all inline globals to statics, and records
* the existance of other globals and how to compile the file in the gtscc
* database file.
* During linking, globals dependencies are analyzed, and a list of
* "convertable" globals is determined. Globals that are not referenced
* globally, but are referenced locally are considered convertable.
* The linker then recompiles the files that those symbols are in, and
* converts them to statics. It also calls the archiver to install
* the converted objects into libraries.
* Finally the linker is called.
*
* Created: David Williams, djw@netscape.com, 13-Feb-1997
*
*--------------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/param.h>
#include <sys/types.h>
#include <unistd.h>
#include <ctype.h>
#if defined(LINUX) && defined(__GLIBC__)
#include <libelf/libelf.h>
#else
#include <libelf.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/time.h>
#define DEFAULT_MAX_GLOBALS 15500
#define ELFSYM_IS_DEFINED(x) ((x).st_shndx != SHN_UNDEF)
#define ELFSYM_IS_UNDEFINED(x) ((x).st_shndx == SHN_UNDEF)
#ifdef IRIX
#define CC_COMMAND "cc"
#define CCC_COMMAND "CC"
#define AS_COMMAND "cc"
#define LD_COMMAND "CC"
#define AR_COMMAND "ar"
#define AR_OPTIONS "cr"
#else
#define HANDLES_DASHSO
#define CC_COMMAND "gcc"
#define CCC_COMMAND "g++"
#define AS_COMMAND "gcc"
#define LD_COMMAND "g++"
#define AR_COMMAND "ar"
#define AR_OPTIONS "cr"
#endif
#define EH_NEW(type) (type*)malloc(sizeof(type))
#define TRUE 1
#define FALSE 0
#define EH_TAG_FILE 'F'
#define EH_TAG_GLOBAL 'G'
#define EH_TAG_ZAPPED 'Z'
#define EH_TAG_INLINE 'I'
#define EH_TAG_UNDEFINED 'U'
#define VERBOSITY_USER(x) ((x) > 0)
#define VERBOSITY_DEBUG(x) ((x) > 1)
#define VERBOSITY_MAJOR(x) ((x) > 2)
static char eh_unnamed_object[] = "<name not known>";
typedef struct {
char* name; /* archive */
} EhArchive;
typedef struct {
char* name; /* name of C/C++ file, relative to rootdir */
char* directory;/* must compile in this directory */
char** cc_args; /* cc -I ..... */
char* as_savefile;
time_t compile_time;
char* target_object;
} EhSource;
typedef struct EhObject {
struct EhObject* _recompile; /* used for recompilation link list */
unsigned _needs_unzap;
char* name; /* name of .o */
EhArchive* archive; /* it is stored in */
EhSource* source;
char* pathname;
unsigned nusers;
} EhObject;
typedef enum {
EH_SYM_UNDEFINED,
EH_SYM_DEFINED,
EH_SYM_ZAPPED,
EH_SYM_INLINE /* are treated special - they belong to no file */
} EhSymState;
typedef struct EhSym {
struct EhSym* _next; /* used for link list */
char* name; /* name of symbol */
EhObject* object; /* if symbol is undefined == NULL */
unsigned ngusers; /* number of global users */
unsigned nlusers; /* number of local file users */
#if 0
unsigned section; /* section in elf file */
unsigned index; /* index into symbol table */
unsigned char info;
unsigned dirty;
#endif
EhSymState state;
} EhSym;
#define EHSYM_ISDEFINED(x) ((x)->object!=NULL && (x)->state==EH_SYM_DEFINED)
#define EHSYM_ISZAPPED(x) ((x)->object!=NULL && (x)->state==EH_SYM_ZAPPED)
#define EHSYM_ISUNDEFINED(x) ((x)->object == NULL)
#define EHSYM_ISUSED(x) ((x)->nusers != 0)
#define EHSYM_ISINLINE(x) ((x)->state == EH_SYM_INLINE)
#define EH_OBJECT_CANBUILD(x) \
((x)->source != NULL && (x)->name != eh_unnamed_object)
#define USE_HASHING
typedef struct {
#ifdef USE_HASHING
EhSym** heads;
unsigned size;
#else
EhSym* head;
#endif
unsigned nentries;
} EhSymTable;
static char*
make_relative_pathname(char* buf, char* filename, char* rootdir)
{
char buf1[MAXPATHLEN];
char buf2[MAXPATHLEN];
char* p;
char* q;
if (rootdir == NULL) {
strcpy(buf, filename);
return filename;
}
if (filename[0] != '/') {
if (getcwd(buf2, sizeof(buf2)) == NULL) {
fprintf(stderr, "cannot get pwd\n");
return NULL;
}
strcat(buf2, "/");
strcat(buf2, filename);
filename = buf2;
}
if (realpath(filename, buf1) == NULL) {
fprintf(stderr, "realpath(%s,..) failed\n", filename);
return NULL;
}
if (realpath(rootdir, buf2) == NULL) {
fprintf(stderr, "realpath(%s,..) failed\n", rootdir);
return NULL;
}
strcat(buf2, "/");
for (p = buf1, q = buf2; *p == *q; p++, q++)
;
strcpy(buf, p);
return buf;
}
static EhArchive*
EhArchiveNew(char* name, char* rootdir)
{
EhArchive* archive = EH_NEW(EhArchive);
char pathbuf[MAXPATHLEN];
make_relative_pathname(pathbuf, name, rootdir);
archive->name = strdup(pathbuf);
return archive;
}
#if 0
/*
* This is evil, we should never free anything, because it messes up
* interning.
*/
static void
EhSourceDelete(EhSource* source)
{
unsigned n;
if (source->name != NULL)
free(source->name);
if (source->directory != NULL)
free(source->directory);
if (source->cc_args != NULL) {
for (n = 0; source->cc_args[n] != NULL; n++)
free(source->cc_args[n]);
free(source->cc_args);
}
if (source->as_savefile != NULL)
free(source->as_savefile);
}
#endif
static EhSource*
EhSourceNew(char* name, char** cc_args, char* directory)
{
EhSource* source = EH_NEW(EhSource);
unsigned n;
unsigned m;
source->name = strdup(name);
source->directory = (directory != NULL)? strdup(directory): NULL;
source->as_savefile = NULL;
source->compile_time = 0;
source->target_object = NULL;
source->cc_args = NULL;
if (cc_args != NULL) {
for (n = 0; cc_args[n] != NULL; n++)
;
source->cc_args = (char**)malloc(sizeof(char*) * (n+1));
for (m = 0, n = 0; cc_args[n] != NULL;) {
if (strcmp(cc_args[n], "-o") == 0 && cc_args[n+1] != NULL) {
source->target_object = strdup(cc_args[n+1]);
n += 2;
} else {
source->cc_args[m++] = strdup(cc_args[n++]);
}
}
source->cc_args[m] = NULL;
}
return source;
}
static EhObject*
EhObjectNewArchiveObject(EhArchive* archive, char* name)
{
EhObject* object = EH_NEW(EhObject);
if (name == eh_unnamed_object)
object->name = name;
else
object->name = strdup(name);
object->archive = archive;
object->source = NULL;
object->_recompile = NULL;
object->_needs_unzap = 0;
object->pathname = NULL;
object->nusers = 0;
return object;
}
static EhObject*
EhObjectNew(char* name, char* rootdir)
{
EhObject* object = EhObjectNewArchiveObject(NULL, name);
char pathname[MAXPATHLEN];
make_relative_pathname(pathname, name, rootdir);
object->pathname = strdup(pathname);
return object;
}
static EhObject*
EhObjectNewFromSource(EhSource* source)
{
EhObject* object = EhObjectNewArchiveObject(NULL, eh_unnamed_object);
object->source = source;
return object;
}
static char*
EhObjectGetFilename(EhObject* object, char* buf)
{
if (object->archive) {
strcpy(buf, object->archive->name);
strcat(buf, ":");
strcat(buf, object->name);
return buf;
} else {
return object->name;
}
}
static EhSym*
EhSymNewDefined(char* name, EhObject* object)
{
EhSym* sym = EH_NEW(EhSym);
sym->name = strdup(name);
sym->object = object;
sym->state = EH_SYM_DEFINED;
sym->ngusers = 0;
sym->nlusers = 0;
return sym;
}
static EhSym*
EhSymNewInline(char* name)
{
EhSym* sym = EhSymNewDefined(name, NULL);
sym->state = EH_SYM_INLINE;
return sym;
}
static EhSym*
EhSymNewUndefined(char* name)
{
EhSym* sym = EhSymNewDefined(name, NULL);
sym->state = EH_SYM_UNDEFINED;
return sym;
}
static EhSym*
EhSymNewZapped(char* name, EhObject* object)
{
EhSym* sym = EhSymNewDefined(name, object);
sym->state = EH_SYM_ZAPPED;
return sym;
}
static EhSym*
EhSymNewRandomZap(char* name)
{
EhSym* sym = EhSymNewZapped(name, NULL);
return sym;
}
EhSymTable*
EhSymTableNew(unsigned p_size)
{
EhSymTable* table = EH_NEW(EhSymTable);
#ifdef USE_HASHING
unsigned size;
for (size = 0x1; size < (16*1024); size <<= 1) {
if (size >= p_size)
break;
}
table->size = size;
table->heads = (EhSym**)calloc(size, sizeof(EhSym*));
#else
table->head = NULL;
#endif
table->nentries = 0;
return table;
}
EhSym*
EhSymTableInsert(EhSymTable* table, EhSym* sym)
{
#ifdef USE_HASHING
unsigned long hash = elf_hash(sym->name);
unsigned long mask = table->size - 1;
unsigned index = (hash & mask);
sym->_next = table->heads[index];
table->heads[index] = sym;
#else
sym->_next = table->head;
table->head = sym;
#endif
table->nentries++;
return sym;
}
EhSym*
EhSymTableFind(EhSymTable* table, char* name)
{
EhSym* sym;
EhSym* head;
#ifdef USE_HASHING
unsigned long hash = elf_hash(name);
unsigned long mask = table->size - 1;
unsigned index = (hash & mask);
head = table->heads[index];
#else
head = table->head;
#endif
for (sym = head; sym != NULL; sym = sym->_next) {
if (strcmp(name, sym->name) == 0)
break;
}
return sym;
}
typedef int (*eh_dump_mappee_t)(EhSym* sym, void* arg);
static int
EhSymTableMap(EhSymTable* table, eh_dump_mappee_t func, void* arg)
{
EhSym* sym;
EhSym* head;
#ifdef USE_HASHING
unsigned n;
for (n = 0; n < table->size; n++) {
head = table->heads[n];
#else
head = table->head; {
#endif
for (sym = head; sym != NULL; sym = sym->_next) {
if ((func)(sym, arg) == -1)
return -1;
}
}
return 0;
}
typedef struct {
EhObject* o_old;
EhObject* o_new;
} fixup_info;
static int
fixup_mappee(EhSym* sym, void* arg)
{
fixup_info* info = (fixup_info*)arg;
if (sym->object == info->o_old)
sym->object = info->o_new;
return 0;
}
static EhObject*
EhSymTableObjectFixup(EhSymTable* table, EhObject* o_old, EhObject* o_new)
{
fixup_info info;
/*
* Now visit every sym that pointed to tmp, and point it
* at object.
*/
info.o_old = o_old;
info.o_new = o_new;
EhSymTableMap(table, fixup_mappee, &info);
return o_new;
}
static char*
safe_fgets(char* buf, unsigned size, FILE* fp)
{
unsigned nread = 0;
if (buf == NULL)
buf = (char*)malloc(size);
for (;;) {
if (fgets(&buf[nread], size - nread, fp) == NULL) {
free(buf);
return NULL;
}
if (strchr(buf, '\n') != NULL)
return buf;
/*
* fgets returns n-1 characters and \0
*/
nread += (size - nread) - 1;
size += 1024;
buf = (char*)realloc(buf, size);
}
}
static int
EhSymTableSetSymbolState(EhSymTable* table, char* name, EhSymState new_state)
{
EhSym* sym = EhSymTableFind(table, name);
if (sym == NULL) {
sym = EhSymNewDefined(name, NULL);
EhSymTableInsert(table, sym);
}
/* new_state must be EH_SYM_DEFINED || EH_SYM_ZAPPED */
if (sym->state == EH_SYM_DEFINED || sym->state == EH_SYM_ZAPPED) {
sym->state = new_state;
} else if (sym->state == EH_SYM_INLINE) {
char* state_name;
if (new_state == EH_SYM_DEFINED)
state_name = "global";
else
state_name = "static";
fprintf(stderr,
"WARNING: Symbol %s is an inline.\n"
" Forcing the symbol %s will be ignored.\n",
name,
state_name);
} else { /* EH_SYM_UNDEFINED */
/*
* This call is being made after objects have started being
* read. This is too late. I'm not sure I care though.
*/
return -1;
}
return 0;
}
static int
EhSymTableFpLoad(EhSymTable* table, FILE* fp)
{
char* buf = NULL; /* I hope this is big enough */
char* p;
char* name;
char* state;
EhSym* sym;
EhSource* source = NULL;
EhObject* object = NULL;
char* cc_args[512];
unsigned n;
unsigned line_n = 0;
char* ctime = NULL;
char* directory;
char* savefile;
while ((buf = safe_fgets(buf, 1024, fp)) != NULL) {
if ((p = strchr(buf, '\n')) == NULL) {
fprintf(stderr, "line to long: %d\n", line_n);
return -1;
}
*p = '\0';
line_n++;
if (buf[0] == '!') /* comment */
continue;
for (p = buf; isspace(*p); p++)
;
name = p;
for (; !isspace(*p); p++)
;
*p++ = '\0';
if (name[0] == '\0')
continue;
for (; isspace(*p); p++)
;
state = p;
for (; !isspace(*p) && *p != '\0'; p++)
;
*p++ = '\0';
if (state[0] == EH_TAG_GLOBAL
||
state[0] == EH_TAG_ZAPPED
||
state[0] == EH_TAG_INLINE) {
sym = EhSymTableFind(table, name);
if (sym == NULL) { /* install a new one */
if (source == NULL && state[0] != EH_TAG_INLINE) {
fprintf(stderr,
"[%d] found new style symbol (%s) but no source\n",
line_n, name);
}
if (state[0] == EH_TAG_GLOBAL)
sym = EhSymNewDefined(name, object);
else if (state[0] == EH_TAG_INLINE)
sym = EhSymNewInline(name);
else
sym = EhSymNewZapped(name, object);
EhSymTableInsert(table, sym);
} else {
if (state[0] == EH_TAG_GLOBAL) {
if (sym->state != EH_SYM_DEFINED) {
fprintf(stderr,
"out of sync defined symbol: %s, fixing\n",
sym->name);
sym->state = EH_SYM_DEFINED;
}
} else if (state[0] == EH_TAG_INLINE) {
if (sym->state != EH_SYM_INLINE) {
fprintf(stderr,
"out of sync inlined symbol: %s, fixing\n",
sym->name);
sym->state = EH_SYM_INLINE;
}
} else {
if (sym->state != EH_SYM_ZAPPED) {
fprintf(stderr,
"out of sync zapped symbol: %s, fixing\n",
sym->name);
sym->state = EH_SYM_ZAPPED;
}
}
#if 0
/* these are probably "special" symbols like .div */
if (sym->object != object) {
fprintf(stderr,
"out of sync object for symbol: %s, ignoring\n",
sym->name);
}
#endif
}
continue; /* no more fields we care about */
} else if (state[0] == EH_TAG_FILE) {
directory = p;
for (; !isspace(*p) && *p != '\0'; p++)
;
*p++ = '\0';
savefile = p;
for (; !isspace(*p) && *p != '\0'; p++)
;
*p++ = '\0';
ctime = p;
for (; !isspace(*p) && *p != '\0'; p++)
;
*p++ = '\0';
for (n = 0; *p != '\0';) {
for (; isspace(*p); p++)
;
cc_args[n++] = p++;
for (; !isspace(*p) && *p != '\0'; p++)
;
if (*p == '\0')
break;
*p++ = '\0';
}
cc_args[n] = NULL;
if (strcmp(directory, ".") == 0)
directory = NULL;
source = EhSourceNew(name, cc_args, directory);
if (ctime != NULL)
source->compile_time = (time_t)atoi(ctime);
object = EhObjectNewFromSource(source);
} else { /* old style symbol list */
sym = EhSymTableFind(table, name);
if (sym != NULL) {
if (sym->state != EH_SYM_ZAPPED) {
fprintf(stderr,
"out of sync random zapped symbol: %s, fixing\n",
sym->name);
sym->state = EH_SYM_ZAPPED;
}
} else {
sym = EhSymNewRandomZap(name);
}
}
}
return line_n;
}
typedef struct {
EhSym** vector;
unsigned index;
} flush_info;
static int
flush_mappee(EhSym* sym, void* arg)
{
flush_info* info = (flush_info*)arg;
if (sym->state == EH_SYM_INLINE
||
(sym->object != NULL && sym->state == EH_SYM_DEFINED)
||
(sym->object != NULL && sym->state == EH_SYM_ZAPPED)) {
if (info->vector != NULL)
info->vector[info->index] = sym;
info->index++;
}
return 0;
}
static int
flush_compare(const void* ap, const void* bp)
{
EhSym** ax = (EhSym**)ap;
EhSym** bx = (EhSym**)bp;
EhSym* a = *ax;
EhSym* b = *bx;
EhObject* oa = a->object;
EhObject* ob = b->object;
int foo;
if (oa == NULL && ob != NULL)
return -1;
if (oa != NULL && ob == NULL)
return 1;
if (oa == NULL && ob == NULL) {
foo = strcmp(a->name, b->name);
if (foo < 0)
return -1;
else if (foo > 0)
return 1;
return 0;
}
if (oa->source == NULL && ob->source != NULL)
return -1;
if (oa->source != NULL && ob->source == NULL)
return 1;
if (oa->source == ob->source)
return 0;
if (oa->source < ob->source)
return -1;
if (oa->source > ob->source)
return 1;
foo = strcmp(a->name, b->name);
if (foo < 0)
return -1;
else if (foo > 0)
return 1;
return 0;
}
static void
EhSourceFpWrite(EhSource* source, FILE* fp)
{
unsigned n = 0;
fputs(source->name, fp);
fputc(' ', fp);
fputc(EH_TAG_FILE, fp);
fputc(' ', fp);
if (source->directory != NULL)
fprintf(fp, "%s", source->directory);
else
fputc('.', fp);
fputc(' ', fp);
if (source->as_savefile != NULL)
fprintf(fp, "%s", source->as_savefile);
else
fputc('.', fp);
fputc(' ', fp);
fprintf(fp, "%d", source->compile_time);
if (source->target_object != NULL) {
fputs(" -o ", fp);
fputs(source->target_object, fp);
}
if (source->cc_args != NULL) {
for (n = 0; source->cc_args[n] != NULL; n++) {
fputc(' ', fp);
fputs(source->cc_args[n], fp);
}
}
if (n < 1)
fprintf(stderr, "WARNING: %s has no args\n", source->name);
fputc('\n', fp);
}
static int
EhSymTableFpDump(EhSymTable* table, FILE* fp)
{
flush_info info;
unsigned n;
EhObject* object = NULL;
EhSym** syms;
EhSym* sym;
unsigned size;
info.index = 0;
info.vector = NULL;
EhSymTableMap(table, flush_mappee, (void*)&info);
size = info.index;
syms = (EhSym**)malloc(sizeof(EhSym*) * size);
info.index = 0;
info.vector = syms;
EhSymTableMap(table, flush_mappee, (void*)&info);
/* sort */
qsort(syms, size, sizeof(EhSym*), flush_compare);
/* dump */
for (n = 0; n < size; n++) {
sym = syms[n];
if (sym->object != object) {
object = sym->object;
if (object->source != NULL) {
EhSourceFpWrite(object->source, fp);
}
}
if (sym->state == EH_SYM_INLINE) {
fprintf(fp, "%s %c\n", sym->name, EH_TAG_INLINE);
} else if (object->source != NULL && sym->state == EH_SYM_ZAPPED) {
fprintf(fp, "%s %c\n", sym->name, EH_TAG_ZAPPED);
} else if (object->source != NULL && sym->state == EH_SYM_DEFINED) {
fprintf(fp, "%s %c\n", sym->name, EH_TAG_GLOBAL);
}
}
free(syms);
return n;
}
int djw_debug;
char* djw_test_name;
int
eh_process_object(Elf* elf, EhObject* object, EhSymTable* table)
{
Elf32_Shdr * shdr;
Elf32_Ehdr * ehdr;
Elf_Scn * scn;
Elf_Data * shstr_data;
Elf_Data* sym_data = NULL;
Elf_Data* str_data = NULL;
Elf_Data* rel_data[4];
int nrel_data = 0;
Elf32_Rel* rel_entries;
Elf_Data* rela_data[10];
int nrela_data = 0;
Elf32_Rela* rela_entries;
unsigned int cnt;
Elf32_Sym* elf_sym;
int i;
int j;
int k;
char* name;
EhSym* sym;
char buf[MAXPATHLEN];
/* Obtain the .shstrtab data buffer */
if (((ehdr = elf32_getehdr(elf)) == NULL) ||
((scn = elf_getscn(elf, ehdr->e_shstrndx)) == NULL) ||
((shstr_data = elf_getdata(scn, NULL)) == NULL)) {
fprintf(stderr, "problems on %s\n", EhObjectGetFilename(object, buf));
return -1;
}
/* get the string table */
for (cnt = 1, scn = NULL; (scn = elf_nextscn(elf, scn)); cnt++) {
if ((shdr = elf32_getshdr(scn)) == NULL) {
fprintf(stderr, "problems on %s, section %d\n",
EhObjectGetFilename(object, buf), cnt);
return -1;
}
#if 0
fprintf(stderr, "%s: section %d type %d name %s\n",
EhObjectGetFilename(object, buf),
cnt,
shdr->sh_type,
(char*)shstr_data->d_buf + shdr->sh_name);
#endif
/*
* Get the string table.
*/
if (shdr->sh_type == SHT_STRTAB &&
#ifdef sun
strcmp((char*)shstr_data->d_buf + shdr->sh_name, ".strtab") == 0 &&
#endif
cnt != ehdr->e_shstrndx) {
if (str_data != NULL) {
fprintf(stderr, "multiple string tables for %s - bailing\n",
EhObjectGetFilename(object, buf));
return -1;
}
str_data = elf_getdata(scn, NULL);
} else if (shdr->sh_type == SHT_SYMTAB) { /* look into sym table */
if (sym_data != NULL) {
fprintf(stderr, "multiple symbol tables for %s - bailing\n",
EhObjectGetFilename(object, buf));
return -1;
}
sym_data = elf_getdata(scn, NULL);
} else if (shdr->sh_type == SHT_REL) { /* look into rel table */
if (nrel_data >= 4) {
fprintf(stderr, "too many relocation tables for %s bailing\n",
EhObjectGetFilename(object, buf));
return -1;
}
rel_data[nrel_data++] = elf_getdata(scn, NULL);
} else if (shdr->sh_type == SHT_RELA) { /* look into rela table */
if (nrela_data >= 10) {
fprintf(stderr, "too many RELA tables for %s bailing\n",
EhObjectGetFilename(object, buf));
return -1;
}
rela_data[nrela_data++] = elf_getdata(scn, NULL);
}
}
if (sym_data == NULL) {
fprintf(stderr, "could not load sym table for %s\n",
EhObjectGetFilename(object, buf));
return -1;
}
if (str_data == NULL) {
fprintf(stderr, "could not load string table for %s\n",
EhObjectGetFilename(object, buf));
return -1;
}
elf_sym = (Elf32_Sym*)sym_data->d_buf;
for (i = 0; i < (sym_data->d_size/sizeof(Elf32_Sym)); i++) {
/*
* We are only interested in globals.
*/
if (ELF32_ST_BIND(elf_sym[i].st_info) != STB_GLOBAL)
continue;
name = (char *)str_data->d_buf + elf_sym[i].st_name;
if (djw_test_name != NULL
&& strcmp(djw_test_name, name) == 0) {
printf("found %s\n", name);
}
sym = EhSymTableFind(table, name);
/*
* Treat inlines as non-globals
*/
if (sym != NULL && sym->state == EH_SYM_INLINE)
continue;
#if 0
printf("name = %s value = %d type = %d, info = %d,"
" other = %d, size = %d\n",
name,
elf_sym[i].st_value,
ELF32_ST_TYPE(elf_sym[i].st_info),
elf_sym[i].st_info,
elf_sym[i].st_other,
elf_sym[i].st_size);
#endif
/* defined */
if (ELFSYM_IS_DEFINED(elf_sym[i])) {
if (sym != NULL) {
if (sym->object == NULL) { /* object undefined */
sym->object = object;
} else if (sym->object->name==eh_unnamed_object) {
if (object->source != NULL
&&
object->source != sym->object->source) {
fprintf(stderr,
"warning: symbol %s defined in more than one source file\n"
"last time: %s\n"
"this time: %s (ignored)\n",
sym->name,
object->source->name,
sym->object->source->name);
} else {
object->source = sym->object->source;
/*
* Do a global: sym->object = object;
*/
EhSymTableObjectFixup(table,
sym->object, /*old*/
object); /*new*/
}
} else if (sym->object != object) {
fprintf(stderr,
"warning: symbol %s define in multiple object files\n"
"last time: %s\n"
"this time: %s (ignored)\n",
sym->name,
object->name,
sym->object->name);
}
sym->state = EH_SYM_DEFINED;
} else {
sym = EhSymNewDefined(name, object);
EhSymTableInsert(table, sym);
}
for (k = 0; k < nrel_data; k++) {
int nentries = rel_data[k]->d_size/sizeof(Elf32_Rel);
rel_entries = (Elf32_Rel*)rel_data[k]->d_buf;
for (j = 0; j < nentries; j++) {
if (ELF32_R_SYM(rel_entries[j].r_info) == i) {
/* locally referenced */
sym->nlusers++;
}
}
}
for (k = 0; k < nrela_data; k++) {
int nentries = rela_data[k]->d_size/sizeof(Elf32_Rela);
rela_entries = (Elf32_Rela*)rela_data[k]->d_buf;
for (j = 0; j < nentries; j++) {
if (ELF32_R_SYM(rela_entries[j].r_info) == i) {
/* locally referenced */
sym->nlusers++;
}
}
}
}
/* Undefined. */
else if (ELFSYM_IS_UNDEFINED(elf_sym[i])) {
if (sym == NULL) {
sym = EhSymNewUndefined(name);
EhSymTableInsert(table, sym);
}
sym->ngusers++;
} else {
#if 1
printf("what is this: "
"name = %s value = %d type = %d, "
"info = %d, other = %d, size = %d\n",
name,
elf_sym[i].st_value,
ELF32_ST_TYPE(elf_sym[i].st_info),
elf_sym[i].st_info,
elf_sym[i].st_other,
elf_sym[i].st_size);
#endif
;
}/* type ==... */
} /* for each symbol */
return 0;
}
int
eh_process_file(char* filename, EhSymTable* table, char* rootdir)
{
Elf* elf;
Elf* arf;
int fd;
Elf_Cmd cmd;
Elf_Kind e_kind;
EhObject* object;
EhArchive* archive;
Elf_Arhdr* arhdr;
char* name;
int rv = 0;
if ((fd = open(filename, O_RDONLY)) == -1) {
fprintf(stderr, "error opening %s\n", filename);
return -1;
}
elf_version(EV_CURRENT);
if ((arf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) {
return -1;
}
e_kind = elf_kind(arf);
if (e_kind == ELF_K_ELF) {
object = EhObjectNew(filename, rootdir);
rv = eh_process_object(arf, object, table);
} else if (e_kind == ELF_K_AR) {
archive = EhArchiveNew(filename, rootdir);
cmd = ELF_C_READ;
#if 0
arsyms = elf_getarsym(arf, &narsyms);
for (i = 0; i < narsyms && arsyms[i].as_name != NULL; i++) {
printf("%s - %d\n", arsyms[i].as_name, arsyms[i].as_off);
}
arhdr = elf_getarhdr(arf);
for (i = 0; arhdr[i].ar_rawname != NULL; i++) {
if (arhdr[i].ar_name != NULL)
printf("%s\n", arhdr[i].ar_name);
else
printf("[%s]\n", arhdr[i].ar_rawname);
}
#endif
rv = 0;
while ((elf = elf_begin(fd, cmd, arf)) != 0) {
e_kind = elf_kind(elf);
if (e_kind != ELF_K_ELF)
continue;
arhdr = elf_getarhdr(elf);
if (arhdr != NULL) {
if (arhdr->ar_name != NULL)
name = arhdr->ar_name;
else
name = arhdr->ar_rawname;
} else {
name = eh_unnamed_object;
}
object = EhObjectNewArchiveObject(archive, name);
rv = eh_process_object(elf, object, table);
if (rv == -1)
break;
cmd = elf_next(elf);
elf_end(elf);
}
}
elf_end(arf);
close(fd);
return rv;
}
static int
eh_dump_unused(EhSym* sym, void* arg)
{
char buf[MAXPATHLEN];
printf(/*"0x%x "*/ "%s %d %d ", /*sym,*/
sym->name, sym->ngusers, sym->nlusers);
if (EHSYM_ISINLINE(sym))
printf("%c ", EH_TAG_INLINE);
else if (EHSYM_ISZAPPED(sym))
printf("%c ", EH_TAG_ZAPPED);
else if (EHSYM_ISDEFINED(sym))
printf("%c ", EH_TAG_GLOBAL);
else
printf("%c ", EH_TAG_UNDEFINED);
if (sym->object != NULL) {
printf("%s ", EhObjectGetFilename(sym->object, buf));
if (sym->object->source != NULL) {
printf("%s recompilable\n", sym->object->source->name);
} else {
printf("nosource notrecompilable\n");
}
} else {
printf("noobject nosource notrecompilable\n");
}
return 0;
}
static void
print_dump(EhSymTable* table)
{
printf("everything\n");
EhSymTableMap(table, eh_dump_unused, NULL);
}
typedef struct {
unsigned ndefined;
unsigned nused; /* globally */
unsigned nundefined;
unsigned nzapped;
unsigned nzapped_nowused;
unsigned ninlined;
unsigned nunlinked;
unsigned ndeadcode;
} SummaryInfo;
static int
eh_summary_mappee(EhSym* sym, void* arg) {
SummaryInfo* info = (SummaryInfo*)arg;
if (EHSYM_ISDEFINED(sym)) {
if (sym->ngusers != 0)
info->nused++;
else if (sym->object != NULL && sym->object->nusers == 0)
info->nunlinked++;
else if (sym->nlusers != 0)
info->ndefined++;
else
info->ndeadcode++;
} else if (EHSYM_ISZAPPED(sym)) { /* one of ours */
if (sym->ngusers != 0)
info->nzapped_nowused++;
else
info->nzapped++;
} else if (EHSYM_ISINLINE(sym)) { /* one of ours */
info->ninlined++;
} else {
info->nundefined++;
}
return 0;
}
static void
get_summary(EhSymTable* table, SummaryInfo* info)
{
info->ndefined = 0;
info->nused = 0;
info->nundefined = 0;
info->nzapped = 0;
info->nzapped_nowused = 0;
info->ninlined = 0;
info->nunlinked = 0;
info->ndeadcode = 0;
EhSymTableMap(table, eh_summary_mappee, info);
}
static void
print_summary(EhSymTable* table)
{
SummaryInfo info;
get_summary(table, &info);
printf("summary:\n"
"defined and used: %d\n"
"defined but unused globally: %d\n"
"total globals in target: %d\n"
"--------------------------------\n"
"global to statics *: %d\n"
"global to statics (now used): %d\n"
"inlined to statics *: %d\n"
"defined in unlinked objects: %d\n"
"defined but unused (deadcode):%d\n"
"undefined but used: %d\n",
info.nused,
info.ndefined,
(info.nused + info.ndefined),
info.nzapped,
info.nzapped_nowused,
info.ninlined,
info.nunlinked,
info.ndeadcode,
info.nundefined);
}
typedef struct EhDirMapEntree {
char* dirname;
struct EhDirMapEntree* _next;
} EhDirMapEntree;
typedef struct EhDirMap {
EhDirMapEntree* head;
} EhDirMap;
static EhDirMap*
EhDirMapNew(void)
{
EhDirMap* dm = EH_NEW(EhDirMap);
dm->head = NULL;
return dm;
}
static void
EhDirMapAddDirectory(EhDirMap* map, char* dirname)
{
EhDirMapEntree* entree = EH_NEW(EhDirMapEntree);
EhDirMapEntree* foo;
entree->dirname = strdup(dirname);
entree->_next = NULL;
if (map->head == NULL) {
map->head = entree;
} else {
for (foo = map->head; foo->_next != NULL; foo = foo->_next)
;
foo->_next = entree;
}
}
static char*
EhDirMapGetLibName(EhDirMap* map, char* name, char* libbuf)
{
EhDirMapEntree* foo;
struct stat buf;
for (foo = map->head; foo != NULL; foo = foo->_next) {
sprintf(libbuf, "%s/lib%s.a", foo->dirname, name);
if (stat(libbuf, &buf) != -1)
return libbuf;
}
return NULL;
}
static char*
test_for_global(char* buf)
{
#ifdef IRIX
if (strncmp(buf, "\t.globl\t", 8) == 0)
return &buf[8];
#else
if (strncmp(buf, "\t.global ", 9) == 0)
return &buf[9];
#endif
return NULL;
}
static char*
test_for_file(char* foo, char* buf)
{
#ifdef IRIX
char* p;
char* q;
if (strncmp(buf, "\t.file\t", 6) == 0) {
for (p = &buf[6]; *p != '"' && *p != '\0'; p++)
;
if (*p == '\0')
return NULL;
p++; /* quote */
q = strchr(p, '"');
if (q == NULL)
return NULL;
memcpy(foo, p, q - p);
foo[q - p] = '\0';
return foo;
}
#else
printf("test_for_file() not implimented\n");
#endif
return NULL;
}
static int
EhSourceZapFp(EhSource* source, EhSymTable* table, FILE* fpi, FILE* fpo,
unsigned verbosity, unsigned cplusplus)
{
char* buf = NULL;
char* p;
int nzap = 0;
char* name;
EhSym* sym;
int i_zapped;
EhObject* object = EhObjectNewFromSource(source);
char* filename = source->name;
char* tmp_name;
char foo[256];
unsigned line_n = 0;
if (VERBOSITY_DEBUG(verbosity))
fputs("gts: ", stderr);
while ((buf = safe_fgets(buf, 4192, fpi)) != NULL) {
i_zapped = 0;
for (p = buf; *p != '\0' && *p != '\n'; p++)
;
*p = '\0';
if ((tmp_name = test_for_file(foo, buf)) != NULL) {
if (strcmp(tmp_name, filename) != 0) /* not the same file */
filename = "non local file";
else
filename = source->name;
}
else if ((name = test_for_global(buf)) != NULL) {
sym = EhSymTableFind(table, name);
/* an inline, we have to treat specially */
if ((filename != source->name && cplusplus != 0) /* inline now */
||
(sym != NULL && sym->state == EH_SYM_INLINE)) {/* was inline */
if (!sym) {
sym = EhSymNewInline(name);
EhSymTableInsert(table, sym);
}
sym->state = EH_SYM_INLINE; /* just make sure */
if (fpo != NULL) /* always zap inlines we see */
fputs(" # gts", fpo);
} else { /* a real global */
if (fpo != NULL && sym != NULL && EHSYM_ISZAPPED(sym)) {
if (VERBOSITY_DEBUG(verbosity)) {
fprintf(stderr, "%s ", &buf[8]);
}
nzap++;
if (fpo != NULL)
fputs(" # gts", fpo);
}
if (sym != NULL) {
if (sym->object == NULL) {
sym->object = object;
} else if (sym->object != object) {
sym->object->source = source;
EhSymTableObjectFixup(table, object, sym->object);
object = sym->object;
}
} else { /* install a new one */
sym = EhSymNewDefined(name, object);
EhSymTableInsert(table, sym);
}
}
}
if (fpo != NULL) {
fputs(buf, fpo);
fputc('\n', fpo);
}
line_n++;
}
if (VERBOSITY_DEBUG(verbosity))
fputc('\n', stderr);
return nzap;
}
static void
print_command(char* command, char** args, unsigned verbosity)
{
int i;
FILE* fp = stderr;
if (!VERBOSITY_USER(verbosity))
return;
fprintf(fp, "%s: ", command);
for (i = 0; args[i]; i++) {
fprintf(fp, "%s ", args[i]);
}
fprintf(fp, "\n");
}
static int
do_command(char* label, char** args, unsigned verbosity)
{
int status;
pid_t child_pid;
char* file = args[0];
print_command(label, args, verbosity);
if ((child_pid = fork()) == -1) {
fprintf(stderr, "could not fork: ");
perror(NULL);
return -1;
}
if (child_pid == 0) { /* i am the child */
if (execvp(file, args) == -1) {
fprintf(stderr, "could not exec %s: ", file);
perror(NULL);
exit(3);
}
/*NOTREACHED*/
}
if (waitpid(child_pid, &status, 0) == -1) {
fprintf(stderr, "wait on %s failed: ", file);
perror(NULL);
return -1;
}
return WEXITSTATUS(status);
}
static char*
suffix_name(char* s)
{
char* p;
if ((p = strrchr(s, '.')) != NULL)
return p;
else
return "";
}
static char base_name_buf[MAXPATHLEN];
static char*
base_name(char* s)
{
char* p;
if ((p = strrchr(s, '.')) != NULL) {
memcpy(base_name_buf, s, p - s);
base_name_buf[p - s] = '\0';
s = base_name_buf;
}
return s;
}
static char*
file_base_name(char *s)
{
char* p;
s = base_name(s);
if ((p = strrchr(s, '/')) != NULL)
s = &p[1];
return s;
}
static int
EhSourceCompile(EhSource* source,
EhSymTable* table,
unsigned verbosity,
unsigned do_compile,
unsigned do_zap,
unsigned do_assem)
{
char* filename = source->name;
char** opts = source->cc_args;
char asname[MAXPATHLEN];
char o_asname[MAXPATHLEN];
char* cc_opts[256];
unsigned i = 0;
unsigned j = 0;
FILE* in_fp;
FILE* out_fp;
int status;
int nzap = 0;
char* save_prefix = NULL;
unsigned do_dash_s = (do_zap != 0 || save_prefix != NULL);
char* cc_command;
char* use_savefile = NULL;
struct timeval start_time;
struct timeval end_time;
#ifdef DEBUG_djw
char savebuf[1024];
#endif
unsigned is_cplusplus = 0;
#ifdef LINUX
gettimeofday(&start_time,NULL);
#else
gettimeofday(&start_time);
#endif
/* munge file */
#ifdef HANDLES_DASHSO
if (source->target_object != NULL)
strcpy(asname, base_name(source->target_object));
else
#endif
strcpy(asname, file_base_name(filename));
strcat(asname, ".s");
strcpy(o_asname, asname);
strcat(o_asname, ".gts_tmp");
if (strcmp(suffix_name(filename), ".cpp") == 0) {
cc_command = CCC_COMMAND;
is_cplusplus = 1;
} else if (strcmp(suffix_name(filename), ".s") == 0) {
do_compile = FALSE;
cc_command = CC_COMMAND;
} else {
cc_command = CC_COMMAND;
}
if (do_compile) {
j = 0;
cc_opts[j++] = cc_command;
cc_opts[j++] = "-c";
if (do_dash_s) {
cc_opts[j++] = "-S";
#ifdef HANDLES_DASHSO
if (source->target_object != NULL) {
cc_opts[j++] = "-o";
cc_opts[j++] = asname;
}
#endif
} else if (source->target_object != NULL) {
cc_opts[j++] = "-o";
cc_opts[j++] = source->target_object;
}
i = 0;
while (opts[i] != NULL)
cc_opts[j++] = opts[i++];
cc_opts[j++] = filename;
cc_opts[j] = NULL;
if ((status = do_command("compile", cc_opts, verbosity)) != 0) {
fprintf(stderr, "compile failed (returned %d)\n", status);
return -1;
}
if (!do_dash_s)
return 0;
}
/*
* Now we have a foo.s file, what do we do with it?
*/
if (do_zap > 1) {
if (use_savefile == NULL)
use_savefile = asname;
if ((in_fp = fopen(use_savefile, "r")) == NULL) {
fprintf(stderr, "could not open %s for reading\n", asname);
return -1;
}
if ((out_fp = fopen(o_asname, "w")) == NULL) {
fprintf(stderr, "could not open %s for writing\n", o_asname);
return -1;
}
j = 0;
cc_opts[j++] = "gts";
cc_opts[j++] = asname;
cc_opts[j++] = o_asname;
cc_opts[j++] = NULL;
print_command("gts", cc_opts, verbosity);
nzap = EhSourceZapFp(source, table, in_fp, out_fp, verbosity, is_cplusplus);
fclose(in_fp);
fclose(out_fp);
j = 0;
cc_opts[j++] = "rename";
cc_opts[j++] = o_asname;
cc_opts[j++] = asname;
cc_opts[j++] = NULL;
print_command("rename", cc_opts, verbosity);
#ifdef DEBUG_djw
strcpy(savebuf, "gts_pre_");
strcat(savebuf, asname);
rename(asname, savebuf);
#endif
if (rename(o_asname, asname) == -1) {
fprintf(stderr, "could not rename %s\n", o_asname);
return -1;
}
} else if (do_zap > 0) { /* audit only */
if ((in_fp = fopen(asname, "r")) == NULL) {
fprintf(stderr, "could not open %s for reading\n", asname);
return -1;
}
j = 0;
cc_opts[j++] = "audit";
cc_opts[j++] = asname;
cc_opts[j++] = NULL;
print_command("audit", cc_opts, verbosity);
nzap = EhSourceZapFp(source, table, in_fp, NULL, verbosity, is_cplusplus);
fclose(in_fp);
}
if (do_assem) {
i = 0;
j = 0;
cc_opts[j++] = AS_COMMAND;
cc_opts[j++] = "-c";
if (source->target_object != NULL) {
cc_opts[j++] = "-o";
cc_opts[j++] = source->target_object;
}
while (opts[i] != NULL)
cc_opts[j++] = opts[i++];
cc_opts[j++] = asname;
cc_opts[j] = NULL;
if ((status = do_command("assemble", cc_opts, verbosity)) != 0) {
unlink(asname);
fprintf(stderr,
"gtscc of %s failed (exit status = %d), reverting to %s:\n",
filename,
status,
cc_command);
i = 0;
j = 0;
cc_opts[j++] = cc_command;
cc_opts[j++] = "-c";
if (source->target_object != NULL) {
cc_opts[j++] = "-o";
cc_opts[j++] = source->target_object;
}
for (; opts[i]; i++, j++)
cc_opts[j] = opts[i];
cc_opts[j++] = filename;
cc_opts[j] = NULL;
if ((status = do_command("fix-compile", cc_opts, verbosity)) != 0)
return -1;
return 0;
}
}
if (save_prefix != NULL && save_prefix[0] != '\0') {
sprintf(o_asname, save_prefix, file_base_name(filename));
j = 0;
cc_opts[j++] = "rename";
cc_opts[j++] = asname;
cc_opts[j++] = o_asname;
cc_opts[j++] = NULL;
print_command("savefile", cc_opts, verbosity);
if (rename(asname, o_asname) == -1) {
fprintf(stderr, "could not rename %s to %s - sorry\n",
asname, o_asname);
return -1;
}
if (source->as_savefile != NULL)
free(source->as_savefile);
source->as_savefile = strdup(o_asname);
} else {
j = 0;
cc_opts[j++] = "unlink";
cc_opts[j++] = asname;
cc_opts[j++] = NULL;
print_command("unlink", cc_opts, verbosity);
#ifdef DEBUG_djw
strcpy(savebuf, "gts_post_");
strcat(savebuf, asname);
rename(asname, savebuf);
#else
unlink(asname);
#endif
}
#ifdef LINUX
gettimeofday(&end_time,NULL);
#else
gettimeofday(&end_time);
#endif
source->compile_time = ((end_time.tv_sec - start_time.tv_sec) * 1000) +
((end_time.tv_usec - start_time.tv_usec) / 1000);
return nzap;
}
static char target_buf[MAXPATHLEN]; /* this will go away with rel source */
static char*
EhSourceGetTarget(EhSource* source)
{
if (source->target_object != NULL)
return source->target_object;
strcpy(target_buf, base_name(source->name));
strcat(target_buf, ".o");
return target_buf;
}
static int
EhArchiveUpdate(EhArchive* archive, char* target, char* rootdir,
unsigned verbosity)
{
char* args[8];
unsigned nargs;
int status;
char pathname[MAXPATHLEN];
pathname[0] = '\0';
if (rootdir != NULL) {
strcat(pathname, rootdir);
strcat(pathname, "/");
}
strcat(pathname, archive->name);
#if 0
nargs = 0;
args[nargs++] = AR_COMMAND;
args[nargs++] = "dc";
args[nargs++] = pathname;
args[nargs++] = target;
args[nargs++] = NULL;
if ((status = do_command("delete from archive", args, verbosity)) != 0) {
fprintf(stderr, "archive: %s delete %s failed (status = %d)\n",
pathname,
target);
return -1;
}
#endif
nargs = 0;
args[nargs++] = AR_COMMAND;
args[nargs++] = AR_OPTIONS;
args[nargs++] = pathname;
args[nargs++] = target;
args[nargs++] = NULL;
if ((status = do_command("archive", args, verbosity)) != 0) {
fprintf(stderr, "archive: %s <- %s failed (status = %d)\n",
pathname,
target);
return -1;
}
return 0;
}
static int
EhObjectRebuild(EhObject* object,
EhSymTable* table,
unsigned verbosity,
char* rootdir)
{
EhSource* source = object->source;
char cwd[MAXPATHLEN];
char fullpath[MAXPATHLEN];
int rv = 0;
int do_chdir = 0;
if (!source) {
fprintf(stderr,
"wanted to recompile %s, but I don't how\n",
object->name);
return -1;
}
#if 0
if (VERBOSITY_USER(verbosity))
#endif
fprintf(stderr, "recompiling %s\n", source->name);
/*
* Check to see if we need to chdir
*/
if (source->directory != NULL) {
if (getcwd(cwd, sizeof(cwd)) == NULL) {
fprintf(stderr, "cannot get pwd: cannot compile\n");
return -1;
}
make_relative_pathname(fullpath, cwd, rootdir);
if (strcmp(fullpath, source->directory) != 0) {
fullpath[0] = '\0';
if (rootdir != NULL) {
strcat(fullpath, rootdir);
strcat(fullpath, "/");
}
strcat(fullpath, source->directory);
if (chdir(fullpath) == -1) {
fprintf(stderr, "cannot chdir - can't compile\n");
return -1;
}
do_chdir++;
}
}
rv = EhSourceCompile(source,
table,
verbosity,
TRUE, /* compile */
2, /* do zap */
TRUE); /* do assem */
if (do_chdir) {
if (chdir(cwd) == -1) {
fprintf(stderr, "cannot chdir - this will be very confused\n");
return -1;
}
}
if (rv == -1) {
fprintf(stderr, "recompiling %s failed\n", source->name);
return -1;
}
/* do archive */
fullpath[0] = '\0';
if (rootdir != NULL) {
strcat(fullpath, rootdir);
strcat(fullpath, "/");
}
if (source->directory != NULL)
strcat(fullpath, source->directory);
strcat(fullpath, "/");
strcat(fullpath, EhSourceGetTarget(source));
if (object->archive != NULL) {
if (EhArchiveUpdate(object->archive, fullpath, rootdir,
verbosity) == -1)
return -1;
}
/* do install */
#if 0
if (rv != -1) {
}
#endif
return rv;
}
static int
object_nusers_mappee(EhSym* sym, void* arg)
{
if (sym->object != NULL)
sym->object->nusers += sym->ngusers;
return 0;
}
typedef struct {
EhObject* recompile_list;
unsigned recompile_count;
unsigned recompile_wish_count;
unsigned unzap_count;
unsigned zap_count;
} RecompileInfo;
static int
recompile_init_mappee(EhSym* sym, void* arg)
{
RecompileInfo* info = (RecompileInfo*)arg;
if (EHSYM_ISZAPPED(sym) && sym->ngusers != 0) {
if (EH_OBJECT_CANBUILD(sym->object)) {
sym->state = EH_SYM_DEFINED;
if (sym->object->_recompile == NULL) {
sym->object->_recompile = info->recompile_list;
info->recompile_list = sym->object;
info->recompile_count++;
}
info->unzap_count++;
sym->object->_needs_unzap++;
}
info->recompile_wish_count++;
}
else if (EHSYM_ISDEFINED(sym) /* it's defined */
&& sym->ngusers == 0 /* there are no global users */
&& sym->nlusers != 0 /* BUT, ther are local users */
&& sym->object->nusers != 0) { /* object is linked */
if (EH_OBJECT_CANBUILD(sym->object)) {
sym->state = EH_SYM_ZAPPED;
if (sym->object->_recompile == NULL) {
sym->object->_recompile = info->recompile_list;
info->recompile_list = sym->object;
info->recompile_count++;
}
info->zap_count++;
}
info->recompile_wish_count++;
}
return 0;
}
static char** recompile_compare_prefs;
static char** recompile_compare_unprefs;
static unsigned
match_prefs(char* candidate, char** prefs)
{
unsigned n;
for (n = 0; prefs[n] != NULL; n++) {
char* pref = prefs[n];
unsigned len = strlen(pref);
if (strncmp(pref, candidate, len) == 0)
return n; /* cool */
}
return (unsigned)-1; /* big! */
}
static int
recompile_compare(const void* ap, const void* bp)
{
EhObject** ax = (EhObject**)ap;
EhObject** bx = (EhObject**)bp;
EhObject* obj_a = *ax;
EhObject* obj_b = *bx;
EhSource* src_a = obj_a->source;
EhSource* src_b = obj_b->source;
unsigned matcha;
unsigned matchb;
int foo;
if (obj_a->_needs_unzap == 0 && obj_b->_needs_unzap != 0)
return -1;
if (obj_a->_needs_unzap != 0 && obj_b->_needs_unzap == 0)
return 1;
if (src_a == NULL && src_b != NULL)
return 1;
if (src_a != NULL && src_b == NULL)
return -1;
if (src_a == src_b)
return 0;
if (recompile_compare_unprefs != NULL
&& src_a->directory != NULL && src_b->directory != NULL) {
matcha = match_prefs(src_a->directory, recompile_compare_unprefs);
matchb = match_prefs(src_b->directory, recompile_compare_unprefs);
if (matcha > matchb) /* greater is good */
return -1;
if (matcha < matchb)
return 1;
}
if (recompile_compare_prefs != NULL
&& src_a->directory != NULL && src_b->directory != NULL) {
matcha = match_prefs(src_a->directory, recompile_compare_prefs);
matchb = match_prefs(src_b->directory, recompile_compare_prefs);
if (matcha > matchb) /* greater is bad */
return 1;
if (matcha < matchb)
return -1;
}
/* else same directory probably */
foo = strcmp(src_a->name, src_b->name);
if (foo < 0)
return -1;
if (foo > 0)
return 1;
return 0;
}
static int
do_recompilation(EhSymTable* table, char* gts_file, unsigned max_globals,
char** prefs, char** unprefs,
char* rootdir, unsigned verbosity)
{
SummaryInfo s_info;
RecompileInfo info;
unsigned size;
unsigned n;
EhObject* object;
EhObject** recompiles;
unsigned delta;
int rv;
unsigned nzaps;
EhObject dummy; /* just marks the end of the recomp list */
time_t eta;
get_summary(table, &s_info);
if ((s_info.nused + s_info.ndefined) <= max_globals) {
if (VERBOSITY_USER(verbosity))
fprintf(stderr,
"number of globals <= requested max, skipping recompilation\n");
return 0;
}
/* Init recompilation. */
info.recompile_list = &dummy; /* cannot use NULL, because syms test that */
info.recompile_count = 0;
info.recompile_wish_count = 0;
info.unzap_count = 0;
info.zap_count = 0;
EhSymTableMap(table, recompile_init_mappee, (void*)&info);
size = info.recompile_count;
recompiles = (EhObject**)malloc(sizeof(EhObject*) * size);
/* install */
n = 0;
for (object = info.recompile_list;
object != &dummy;
object = object->_recompile) {
recompiles[n++] = object;
}
/* sort */
recompile_compare_prefs = prefs;
recompile_compare_unprefs = unprefs;
qsort(recompiles, size, sizeof(EhObject*), recompile_compare);
/*
* sorted !
* less recompile the first n, n = ndefined - max
*/
delta = (s_info.nused + s_info.ndefined) - max_globals;
if (delta > info.zap_count) {
fprintf(stderr,
"WARNING: there too many globals (%d/%d fixables).\n"
" I don't think I can fix this, but I'll try.\n"
" You might get lucky.\n",
info.zap_count,
delta);
}
if (VERBOSITY_USER(verbosity))
fprintf(stderr, "scheduling recompilation targets:\n");
eta = 0;
for (n = 0; n < size; n++) {
char* cname = "unknown";
object = recompiles[n];
if (object->source != NULL) {
cname = object->source->name;
eta += object->source->compile_time;
}
if (VERBOSITY_DEBUG(verbosity))
fprintf(stderr, "object %s from source %s\n", object->name, cname);
}
#if 0
if (VERBOSITY_USER(verbosity))
#endif
fprintf(stderr, "gts-ing %d symbols, eta = %d minutes\n", delta,
eta/(60*1000));
if (gts_file != NULL) {
FILE* zap_fp;
if ((zap_fp = fopen(gts_file, "w")) == NULL) {
perror(0);
fprintf(stderr,
"WARNING: could not open the gtscc db file %s.\n"
" I will continue with the recompilation, but\n"
" if you recompile any of the files I touched\n"
" I'll have to recompile them after you!\n",
gts_file);
} else {
EhSymTableFpDump(table, zap_fp);
fclose(zap_fp);
}
}
for (n = 0, nzaps = 0; n < size && nzaps < delta; n++) {
object = recompiles[n];
rv = EhObjectRebuild(object, table, verbosity, rootdir);
if (rv == -1)
return -1;
nzaps += rv;
object->_recompile = NULL; /* clean up now */
}
if (nzaps < delta) {
fprintf(stderr,
"WARNING: I wanted to gts %d symbols, but only managed\n"
" to get %d of them.\n"
" Your link may fail with GOT errors.\n",
delta,
nzaps);
}
free(recompiles);
return n;
}
typedef struct FileList
{
char* name;
struct FileList* next;
} FileList;
static FileList*
fileListFind(FileList* list, char* name)
{
FileList* foo;
for (foo = list; foo != NULL; foo = foo->next) {
if (strcmp(name, foo->name) == 0)
return foo;
}
return NULL;
}
static FileList*
fileListAppend(FileList** list_a, char* name)
{
FileList* list = *list_a;
FileList* foo;
FileList* last;
for (foo = list, last = NULL; foo != NULL; last = foo, foo = foo->next)
;
if (last == NULL) {
foo = EH_NEW(FileList);
foo->next = NULL;
foo->name = strdup(name);
*list_a = foo;
} else {
foo = EH_NEW(FileList);
foo->next = NULL;
foo->name = strdup(name);
last->next = foo;
}
return *list_a;
}
#if 0
static FileList* c_list;
#endif
static FileList* o_list;
#if 0
static char*
EhSourceAdjustPathname(EhSource* source, char* rootdir)
{
char buf[MAXPATHLEN];
char buf2[MAXPATHLEN];
char* p;
char* q;
char* filename = source->name;
if (getcwd(buf, sizeof(buf)) == NULL) {
fprintf(stderr, "cannot get pwd\n");
return NULL;
}
strcat(buf, "/");
strcat(buf, filename);
if (rootdir == NULL) {
filename = buf;
} else {
if (realpath(buf, buf2) == NULL) {
fprintf(stderr, "realpath() failed: %s\n", buf2);
return NULL;
}
if (realpath(rootdir, buf) == NULL) {
fprintf(stderr, "realpath() failed: %s\n", buf);
return NULL;
}
strcat(buf, "/");
for (p = buf, q = buf2; *p == *q; p++, q++)
;
filename = q;
}
free(source->name);
source->name = strdup(filename);
return source->name;
}
#endif
static unsigned
katoi(char *buf)
{
unsigned base = 1;
char* s;
for (s = buf; isdigit(*s); s++)
;
if (*s == 'k' || *s == 'K')
base = 1024;
*s = '\0';
return base * atoi(buf);
}
static void
usage(void)
{
fprintf(stderr,
"Usage:\n"
"as a compiler:\n"
"gtscc [gtscc_options] [compiler_options] -c file.c file.cpp ...\n"
"gtscc_options:\n"
"-gtsfile <db.gts> the gts database file (use this)\n"
"-gtszapsymbol <name> convert symbol <name>\n"
"-gtsnozapsymbol <name> don't convert symbol <name>\n"
"-gtsrootdir <directory> the root for the tree (use this)\n"
"-gtsverbose be more verbose (3 levels)\n"
"-gtsnozap don't convert globals to statics\n"
"-gtsnoupdate don't update the database file\n"
"as a linker:\n"
"gtscc [gtscc_options] [linker_options] file.o ... libxx.a ...\n"
"gtscc_options:\n"
"-gtsfile <db.gts> the gts database file (use this)\n"
"-gtszapsymbol <name> convert symbol <name>\n"
"-gtsnozapsymbol <name> don't convert symbol <name>\n"
"-gtsrootdir <directory> the root for the tree (use this)\n"
"-gtspref <directory> please recompile these paths first\n"
"-gtsunpref <directory> please try to avoid recompiling these\n"
"-gtsverbose be more verbose (3 levels)\n"
"-gtssummary print a summary of global usage\n"
"-gtsdump print a detailed listing of all symbols\n"
"-gtsmaxglobals <number>[k] maximum globals allowed in target\n"
"-gtsnorecompile don't do the normal recompilation\n"
"-gtsnolink don't call linker after recompilation\n"
"-gtsnoupdate don't update the database file\n"
"-help print this\n"
);
}
int
main(int argc, char** argv)
{
EhSymTable* table = EhSymTableNew(1000);
EhSym* sym;
FILE* zap_fp;
unsigned n = 0;
unsigned verbosity = 0;
char* arg_buf[256];
unsigned nargs = 0;
EhDirMap* dmap = EhDirMapNew();
unsigned do_dump = 0;
unsigned do_summary = 0;
unsigned do_link = 1;
unsigned in_link = 1;
unsigned do_audit = 1;
unsigned do_zap = 1;
unsigned do_assem = 1;
unsigned do_recompile = 1;
unsigned do_collect = 1;
char* name;
char* saveprefix = NULL;
char* rootdir = NULL;
int rv;
EhSource* source = NULL;
char* gts_file = NULL;
char* path_prefs[32];
unsigned npath_prefs = 0;
char* path_un_prefs[32];
unsigned npath_un_prefs = 0;
char* suffix;
unsigned max_globals = DEFAULT_MAX_GLOBALS;
FileList* list;
if (elf_version(EV_CURRENT) == EV_NONE) {
fprintf(stderr, "something losing about your elf lib - sorry!\n");
return 3;
/* library out of date */
/* recover from error */
}
arg_buf[nargs] = NULL;
for (n = 1; n < argc; n++) {
if (strcmp(argv[n], "-help") == 0) {
usage();
return 0;
} else if (strcmp(argv[n], "-gtssummary") == 0) {
do_summary = 1;
} else if (strcmp(argv[n], "-gtsdump") == 0) {
do_dump = 1;
} else if (strcmp(argv[n], "-gtsnorecompile") == 0) {
do_recompile = 0;
} else if (strcmp(argv[n], "-gtsnolink") == 0) {
do_link = 0;
} else if (strcmp(argv[n], "-gtsverbose") == 0) {
verbosity++;
} else if (strcmp(argv[n], "-gtsnoupdate") == 0) {
do_collect = 0;
} else if (strcmp(argv[n], "-gtsnoaudit") == 0) {
do_audit = 0;
} else if (strcmp(argv[n], "-gtsnozap") == 0) {
do_zap = 0;
} else if (strcmp(argv[n], "-gtsrootdir") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtsrootdir requires an argument\n");
usage();
return 2;
}
rootdir = argv[n+1];
n++;
} else if (strcmp(argv[n], "-gtsdebugsym") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtsdebugsym requires an argument\n");
usage();
return 2;
}
djw_test_name = argv[n+1];
n++;
} else if (strcmp(argv[n], "-gtsmaxglobals") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtsmaxglobals requires an argument\n");
usage();
return 2;
}
max_globals = katoi(argv[n+1]);
n++;
} else if (strcmp(argv[n], "-gtspref") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtspref requires an argument\n");
usage();
return 2;
}
path_prefs[npath_prefs++] = argv[n+1];
path_prefs[npath_prefs] = NULL;
n++;
} else if (strcmp(argv[n], "-gtsunpref") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtsunpref requires an argument\n");
usage();
return 2;
}
path_un_prefs[npath_un_prefs++] = argv[n+1];
path_un_prefs[npath_un_prefs] = NULL;
n++;
} else if (strcmp(argv[n], "-gtssaveprefix") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtssaveprefix requires an argument\n");
usage();
return 2;
}
saveprefix = argv[n+1];
n++;
} else if (strcmp(argv[n], "-gtsfile") == 0) {
struct stat sbuf;
if (argc < n+2) {
fprintf(stderr, "-gtsfile requires an argument\n");
usage();
return 2;
}
gts_file = argv[n+1];
if (stat(gts_file, &sbuf) == -1) {
fprintf(stderr,
"warning: %s does not exist, will be created\n",
gts_file);
} else {
if ((zap_fp = fopen(gts_file, "r")) == NULL) {
fprintf(stderr, "you lose cannot open %s\n", gts_file);
usage();
return 2;
}
if (EhSymTableFpLoad(table, zap_fp) == -1) {
fprintf(stderr,
"error: failed reading symbols from gtsfile %s\n",
argv[n+1]);
usage();
return 2;
}
fclose(zap_fp);
}
n++;
} else if (strcmp(argv[n], "-gtszapsymbol") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtszapsymbol requires an argument\n");
usage();
return 2;
}
EhSymTableSetSymbolState(table, argv[n+1], EH_SYM_ZAPPED);
n++;
} else if (strcmp(argv[n], "-gtsnozapsymbol") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtsnozapsymbol requires an argument\n");
usage();
return 2;
}
EhSymTableSetSymbolState(table, argv[n+1], EH_SYM_DEFINED);
n++;
} else if (strcmp(argv[n], "-gtsname") == 0) {
if (argc < n+2) {
fprintf(stderr, "-gtsname requires an argument\n");
usage();
return 2;
}
sym = EhSymTableFind(table, argv[n+1]);
if (!sym)
sym = EhSymNewRandomZap(argv[n+1]);
n++;
do_audit = 1;
} else if (strcmp(argv[n], "-c") == 0) { /* do not link */
in_link = 0;
do_link = 0;
} else if (strcmp(argv[n], "-S") == 0) { /* do not assem */
do_assem = 0;
} else if (strcmp(argv[n], "-o") == 0) { /* parse through */
arg_buf[nargs++] = argv[n++];
arg_buf[nargs++] = argv[n];
arg_buf[nargs] = NULL;
} else if (strcmp((suffix = suffix_name(argv[n])), ".cpp") == 0
||
strcmp(suffix, ".c") == 0
||
strcmp(suffix, ".s") == 0) {
char pathname[MAXPATHLEN];
make_relative_pathname(pathname, ".", rootdir);
source = EhSourceNew(argv[n], arg_buf, pathname);
rv = EhSourceCompile(source,
table,
verbosity,
TRUE, /* compile, .s files ignore anyway */
(do_audit + do_zap),
do_assem);
if (rv == -1)
return 1;
#if 0
EhSourceAdjustPathname(source, rootdir);
#endif
} else if (strcmp(suffix, ".o") == 0 || strcmp(suffix, ".a") == 0) {
if (fileListFind(o_list, argv[n]) == NULL) {
fileListAppend(&o_list, argv[n]);
} else {
fprintf(stderr,
"%s repeated on command line - ignored\n",
argv[n]);
}
arg_buf[nargs++] = argv[n];
arg_buf[nargs] = NULL;
} else if (strncmp(argv[n], "-L", 2) == 0) {
EhDirMapAddDirectory(dmap, &argv[n][2]);
} else if (strncmp(argv[n], "-l", 2) == 0) {
char pathbuf[MAXPATHLEN];
name = EhDirMapGetLibName(dmap, &argv[n][2], pathbuf);
if (name != NULL) {
if (fileListFind(o_list, name) == NULL) {
fileListAppend(&o_list, name);
} else {
fprintf(stderr,
"%s repeated on command line - ignored\n",
name);
}
} else {
fprintf(stderr,
"unable to resolve library reference %s - ignoring\n",
argv[n]);
}
arg_buf[nargs++] = argv[n];
arg_buf[nargs] = NULL;
} else {
arg_buf[nargs++] = argv[n];
arg_buf[nargs] = NULL;
}
}
/*
* Analyse objects.
*/
if (o_list != NULL) {
for (list = o_list; list != NULL; list = list->next) {
if (eh_process_file(list->name, table, rootdir)) {
fprintf(stderr, "oops we died around %s\n", list->name);
return 1;
}
}
/* look for unused objects */
EhSymTableMap(table, object_nusers_mappee, 0);
}
if (do_summary) {
print_summary(table);
}
if (do_dump) {
print_dump(table);
}
if (!in_link && gts_file != NULL) {
FILE* zap_fp;
if ((zap_fp = fopen(gts_file, "w")) == NULL) {
perror(0);
usage();
return 2;
}
EhSymTableFpDump(table, zap_fp);
fclose(zap_fp);
return 0;
}
/*
* Now the fun really starts.
*/
if (do_recompile) {
char** pp = NULL;
char** up = NULL;
if (npath_prefs > 0)
pp = path_prefs;
if (npath_un_prefs > 0)
up = path_un_prefs;
if (!do_collect)
gts_file = NULL;
rv = do_recompilation(table, gts_file, max_globals, pp, up, rootdir,
verbosity);
if (rv == -1)
return 1;
}
/*
* Finally.
*/
if (do_link) {
int status;
arg_buf[nargs+1] = NULL;
for (n = nargs; n > 0; n--)
arg_buf[n] = arg_buf[n-1];
arg_buf[0] = LD_COMMAND;
status = do_command("link", arg_buf, verbosity);
if (status == -1)
return 3;
else
return status;
}
return 0;
}
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