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ftmemsim-valgrind/coregrind/m_debuglog.c
Julian Seward cc8ccbbfb4 This commit merges in changes from branches/ASPACEM (specifically, 
changes from r4341 through r4787 inclusive).  That branch is now dead.
Please do not commit anything else to it.

For the most part the merge was not troublesome.  The main areas of
uncertainty are:

- build system: I had to import by hand Makefile.core-AM_CPPFLAGS.am
  and include it in a couple of places.  Building etc seems to still
  work, but I haven't tried building the documentation.

- syscall wrappers: Following analysis by Greg & Nick, a whole lot of
  stuff was moved from -generic to -linux after the branch was created.
  I think that is satisfactorily glued back together now.

- Regtests: although this appears to work, no .out files appear, which
  is strange, and makes it hard to diagnose regtest failures.  In
  particular memcheck/tests/x86/scalar.stderr.exp remains in a 
  conflicted state.

- amd64 is broken (slightly), and ppc32 will be unbuildable.  I'll
  attend to the former shortly.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4789
2005-09-27 19:20:21 +00:00

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/*--------------------------------------------------------------------*/
/*--- Debug (not-for-user) logging; also vprintf. m_debuglog.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2005 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
/* Performs low-level debug logging that can safely run immediately
after startup. To minimise the dependencies on any other parts of
the system, the only place the debug output may go is file
descriptor 2 (stderr).
*/
/* This is the first-initialised module in the entire system!
Therefore it is CRITICAL that it does not depend on any other code
running first. Hence only the following very limited includes. We
cannot depend (directly or indirectly) on any dynamic memory
allocation facilities, nor on the m_libc facilities, since the
latter depend on this module. DO NOT MESS WITH THESE INCLUDES
UNLESS YOU ARE 100% CERTAIN YOU UNDERSTAND THE CONSEQUENCES.
*/
/* This module is also notable because it is linked into both
stage1 and stage2. */
#include "pub_core_basics.h" /* basic types */
#include "pub_core_debuglog.h" /* our own iface */
#include "valgrind.h" /* for RUNNING_ON_VALGRIND */
/*------------------------------------------------------------*/
/*--- Stuff to make us completely independent. ---*/
/*------------------------------------------------------------*/
/* ----- x86-linux specifics ----- */
#if defined(VGP_x86_linux)
static UInt local_sys_write_stderr ( HChar* buf, Int n )
{
UInt __res;
__asm__ volatile (
"pushl %%ebx\n" // ebx is callee-save
"movl $4, %%eax\n" /* %eax = __NR_write */
"movl $1, %%ebx\n" /* %ebx = stderr */
"movl %1, %%ecx\n" /* %ecx = buf */
"movl %2, %%edx\n" /* %edx = n */
"int $0x80\n" /* write(stderr, buf, n) */
"movl %%eax, %0\n" /* __res = eax */
"popl %%ebx\n" // restore ebx
: "=mr" (__res)
: "g" (buf), "g" (n)
: "eax", "edi", "ecx", "edx"
);
if (__res < 0)
__res = -1;
return __res;
}
static UInt local_sys_getpid ( void )
{
UInt __res;
__asm__ volatile (
"movl $20, %%eax\n" /* set %eax = __NR_getpid */
"int $0x80\n" /* getpid() */
"movl %%eax, %0\n" /* set __res = eax */
: "=mr" (__res)
:
: "eax" );
return __res;
}
#elif defined(VGP_amd64_linux)
static UInt local_sys_write_stderr ( HChar* buf, Int n )
{
UInt __res;
__asm__ volatile (
"movq $1, %%rax\n" /* set %rax = __NR_write */
"movq $2, %%rdi\n" /* set %rdi = stderr */
"movq %1, %%rsi\n" /* set %rsi = buf */
"movl %2, %%edx\n" /* set %edx = n */
"syscall\n" /* write(stderr, buf, n) */
"movl %%eax, %0\n" /* set __res = %eax */
: "=mr" (__res)
: "g" (buf), "g" (n)
: "rax", "rdi", "rsi", "rdx" );
if (__res < 0)
__res = -1;
return __res;
}
static UInt local_sys_getpid ( void )
{
UInt __res;
__asm__ volatile (
"movq $39, %%rax\n" /* set %rax = __NR_getpid */
"syscall\n" /* getpid() */
"movl %%eax, %0\n" /* set __res = %eax */
: "=mr" (__res)
:
: "rax" );
return __res;
}
#elif defined(VGP_ppc32_linux)
static UInt local_sys_write_stderr ( HChar* buf, Int n )
{
UInt __res;
__asm__ volatile (
"li %%r0,4\n\t" /* set %r0 = __NR_write */
"li %%r3,2\n\t" /* set %r3 = stderr */
"mr %%r4,%1\n\t" /* set %r4 = buf */
"mr %%r5,%2\n\t" /* set %r5 = n */
"sc\n\t" /* write(stderr, buf, n) */
"mr %0,%%r3\n" /* set __res = r3 */
: "=mr" (__res)
: "g" (buf), "g" (n)
: "r0", "r3", "r4", "r5" );
if (__res < 0)
__res = -1;
return __res;
}
static UInt local_sys_getpid ( void )
{
UInt __res;
__asm__ volatile (
"li %%r0,20\n" /* set %r0 = __NR_getpid */
"\tsc\n" /* getpid() */
"\tmr %0,%%r3\n" /* set __res = r3 */
: "=mr" (__res)
:
: "r0" );
return __res;
}
#else
# error Unknown platform
#endif
/* ----- generic ----- */
/* strlen, so we don't need m_libc */
static Int local_strlen ( const HChar* str )
{
Int i = 0;
while (str[i] != 0) i++;
return i;
}
static HChar local_toupper ( HChar c )
{
if (c >= 'a' && c <= 'z')
return c + ('A' - 'a');
else
return c;
}
/* Emit buf[0 .. n-1] to stderr. Unfortunately platform-specific.
*/
static void emit ( HChar* buf, Int n )
{
if (n >= 1)
(void)local_sys_write_stderr(buf, n);
}
/*------------------------------------------------------------*/
/*--- A simple, generic, vprintf implementation. ---*/
/*------------------------------------------------------------*/
/* -----------------------------------------------
Distantly derived from:
vprintf replacement for Checker.
Copyright 1993, 1994, 1995 Tristan Gingold
Written September 1993 Tristan Gingold
Tristan Gingold, 8 rue Parmentier, F-91120 PALAISEAU, FRANCE
(Checker itself was GPL'd.)
----------------------------------------------- */
/* Some flags. */
#define VG_MSG_SIGNED 1 /* The value is signed. */
#define VG_MSG_ZJUSTIFY 2 /* Must justify with '0'. */
#define VG_MSG_LJUSTIFY 4 /* Must justify on the left. */
#define VG_MSG_PAREN 8 /* Parenthesize if present (for %y) */
#define VG_MSG_COMMA 16 /* Add commas to numbers (for %d, %u) */
/* Copy a string into the buffer. */
static
UInt myvprintf_str ( void(*send)(HChar,void*),
void* send_arg2,
Int flags,
Int width,
HChar* str,
Bool capitalise )
{
# define MAYBE_TOUPPER(ch) (capitalise ? local_toupper(ch) : (ch))
UInt ret = 0;
Int i, extra;
Int len = local_strlen(str);
if (width == 0) {
ret += len;
for (i = 0; i < len; i++)
send(MAYBE_TOUPPER(str[i]), send_arg2);
return ret;
}
if (len > width) {
ret += width;
for (i = 0; i < width; i++)
send(MAYBE_TOUPPER(str[i]), send_arg2);
return ret;
}
extra = width - len;
if (flags & VG_MSG_LJUSTIFY) {
ret += extra;
for (i = 0; i < extra; i++)
send(' ', send_arg2);
}
ret += len;
for (i = 0; i < len; i++)
send(MAYBE_TOUPPER(str[i]), send_arg2);
if (!(flags & VG_MSG_LJUSTIFY)) {
ret += extra;
for (i = 0; i < extra; i++)
send(' ', send_arg2);
}
# undef MAYBE_TOUPPER
return ret;
}
/* Copy a string into the buffer, escaping bad XML chars. */
static
UInt myvprintf_str_XML_simplistic ( void(*send)(HChar,void*),
void* send_arg2,
HChar* str )
{
UInt ret = 0;
Int i;
Int len = local_strlen(str);
HChar* alt;
for (i = 0; i < len; i++) {
switch (str[i]) {
case '&': alt = "&amp;"; break;
case '<': alt = "&lt;"; break;
case '>': alt = "&gt;"; break;
default: alt = NULL;
}
if (alt) {
while (*alt) {
send(*alt, send_arg2);
ret++;
alt++;
}
} else {
send(str[i], send_arg2);
ret++;
}
}
return ret;
}
/* Write P into the buffer according to these args:
* If SIGN is true, p is a signed.
* BASE is the base.
* If WITH_ZERO is true, '0' must be added.
* WIDTH is the width of the field.
*/
static
UInt myvprintf_int64 ( void(*send)(HChar,void*),
void* send_arg2,
Int flags,
Int base,
Int width,
ULong p )
{
HChar buf[40];
Int ind = 0;
Int i, nc = 0;
Bool neg = False;
HChar* digits = "0123456789ABCDEF";
UInt ret = 0;
if (base < 2 || base > 16)
return ret;
if ((flags & VG_MSG_SIGNED) && (Long)p < 0) {
p = - (Long)p;
neg = True;
}
if (p == 0)
buf[ind++] = '0';
else {
while (p > 0) {
if (flags & VG_MSG_COMMA && 10 == base &&
0 == (ind-nc) % 3 && 0 != ind)
{
buf[ind++] = ',';
nc++;
}
buf[ind++] = digits[p % base];
p /= base;
}
}
if (neg)
buf[ind++] = '-';
if (width > 0 && !(flags & VG_MSG_LJUSTIFY)) {
for(; ind < width; ind++) {
/* vg_assert(ind < 39); */
if (ind > 39) {
buf[39] = 0;
break;
}
buf[ind] = (flags & VG_MSG_ZJUSTIFY) ? '0': ' ';
}
}
/* Reverse copy to buffer. */
ret += ind;
for (i = ind -1; i >= 0; i--) {
send(buf[i], send_arg2);
}
if (width > 0 && (flags & VG_MSG_LJUSTIFY)) {
for(; ind < width; ind++) {
ret++;
/* Never pad with zeroes on RHS -- changes the value! */
send(' ', send_arg2);
}
}
return ret;
}
/* A simple vprintf(). */
/* EXPORTED */
UInt
VG_(debugLog_vprintf) (
void(*send)(HChar,void*),
void* send_arg2,
const HChar* format,
va_list vargs
)
{
UInt ret = 0;
Int i;
Int flags;
Int width;
Int n_ls = 0;
Bool is_long;
/* We assume that vargs has already been initialised by the
caller, using va_start, and that the caller will similarly
clean up with va_end.
*/
for (i = 0; format[i] != 0; i++) {
if (format[i] != '%') {
send(format[i], send_arg2);
ret++;
continue;
}
i++;
/* A '%' has been found. Ignore a trailing %. */
if (format[i] == 0)
break;
if (format[i] == '%') {
/* '%%' is replaced by '%'. */
send('%', send_arg2);
ret++;
continue;
}
flags = 0;
n_ls = 0;
width = 0; /* length of the field. */
if (format[i] == '(') {
flags |= VG_MSG_PAREN;
i++;
}
/* If ',' follows '%', commas will be inserted. */
if (format[i] == ',') {
flags |= VG_MSG_COMMA;
i++;
}
/* If '-' follows '%', justify on the left. */
if (format[i] == '-') {
flags |= VG_MSG_LJUSTIFY;
i++;
}
/* If '0' follows '%', pads will be inserted. */
if (format[i] == '0') {
flags |= VG_MSG_ZJUSTIFY;
i++;
}
/* Compute the field length. */
while (format[i] >= '0' && format[i] <= '9') {
width *= 10;
width += format[i++] - '0';
}
while (format[i] == 'l') {
i++;
n_ls++;
}
// %d means print a 32-bit integer.
// %ld means print a word-size integer.
// %lld means print a 64-bit integer.
if (0 == n_ls) { is_long = False; }
else if (1 == n_ls) { is_long = ( sizeof(void*) == sizeof(Long) ); }
else { is_long = True; }
switch (format[i]) {
case 'd': /* %d */
flags |= VG_MSG_SIGNED;
if (is_long)
ret += myvprintf_int64(send, send_arg2, flags, 10, width,
(ULong)(va_arg (vargs, Long)));
else
ret += myvprintf_int64(send, send_arg2, flags, 10, width,
(ULong)(va_arg (vargs, Int)));
break;
case 'u': /* %u */
if (is_long)
ret += myvprintf_int64(send, send_arg2, flags, 10, width,
(ULong)(va_arg (vargs, ULong)));
else
ret += myvprintf_int64(send, send_arg2, flags, 10, width,
(ULong)(va_arg (vargs, UInt)));
break;
case 'p': /* %p */
ret += 2;
send('0',send_arg2);
send('x',send_arg2);
ret += myvprintf_int64(send, send_arg2, flags, 16, width,
(ULong)((UWord)va_arg (vargs, void *)));
break;
case 'x': /* %x */
if (is_long)
ret += myvprintf_int64(send, send_arg2, flags, 16, width,
(ULong)(va_arg (vargs, ULong)));
else
ret += myvprintf_int64(send, send_arg2, flags, 16, width,
(ULong)(va_arg (vargs, UInt)));
break;
case 'c': /* %c */
ret++;
send(va_arg (vargs, int), send_arg2);
break;
case 's': case 'S': { /* %s */
char *str = va_arg (vargs, char *);
if (str == (char*) 0) str = "(null)";
ret += myvprintf_str(send, send_arg2,
flags, width, str, format[i]=='S');
break;
}
case 't': { /* %t, like %s but escaping chars for XML safety */
/* Note: simplistic; ignores field width and flags */
char *str = va_arg (vargs, char *);
if (str == (char*) 0) str = "(null)";
ret += myvprintf_str_XML_simplistic(send, send_arg2, str);
break;
}
// case 'y': { /* %y - print symbol */
// Char buf[100];
// Char *cp = buf;
// Addr a = va_arg(vargs, Addr);
//
// if (flags & VG_MSG_PAREN)
// *cp++ = '(';
// if (VG_(get_fnname_w_offset)(a, cp, sizeof(buf)-4)) {
// if (flags & VG_MSG_PAREN) {
// cp += VG_(strlen)(cp);
// *cp++ = ')';
// *cp = '\0';
// }
// ret += myvprintf_str(send, send_arg2, flags, width, buf, 0);
// }
// break;
// }
default:
break;
}
}
return ret;
}
/*------------------------------------------------------------*/
/*--- Debuglog stuff. ---*/
/*------------------------------------------------------------*/
/* Only print messages whose stated level is less than or equal to
this. By default, it makes this entire subsystem silent. */
static Int loglevel = 0;
/* Module startup. */
/* EXPORTED */
void VG_(debugLog_startup) ( Int level, HChar* who )
{
if (level < 0) level = 0;
if (level > 10) level = 10;
loglevel = level;
VG_(debugLog)(1, "debuglog",
"DebugLog system started by %s, "
"level %d logging requested\n",
who, loglevel);
}
/* Get the logging threshold level, as set by the most recent call to
VG_(debugLog_startup), or zero if there have been no such calls so
far. */
/* EXPORTED */
Int VG_(debugLog_getLevel) ( void )
{
return loglevel;
}
/* ------------ */
typedef
struct {
HChar buf[100];
Int n;
}
printf_buf;
static void add_to_buf ( HChar c, void* p )
{
printf_buf* buf = (printf_buf*)p;
if (buf->n >= 100-10 /*paranoia*/ ) {
emit( buf->buf, local_strlen(buf->buf) );
buf->n = 0;
buf->buf[buf->n] = 0;
}
buf->buf[buf->n++] = c;
buf->buf[buf->n] = 0;
}
/* Send a logging message. Nothing is output unless 'level'
is <= the current loglevel. */
/* EXPORTED */
__attribute__((format(__printf__, 3, 4)))
void VG_(debugLog) ( Int level, const HChar* modulename,
const HChar* format, ... )
{
UInt ret, pid;
Int indent, depth, i;
va_list vargs;
printf_buf buf;
if (level > loglevel)
return;
indent = 2*level - 1;
if (indent < 1) indent = 1;
buf.n = 0;
buf.buf[0] = 0;
pid = local_sys_getpid();
// Print one '>' in front of the messages for each level of self-hosting
// being performed.
depth = RUNNING_ON_VALGRIND;
for (i = 0; i < depth; i++) {
(void)myvprintf_str ( add_to_buf, &buf, 0, 1, ">", False );
}
(void)myvprintf_str ( add_to_buf, &buf, 0, 2, "--", False );
(void)myvprintf_int64 ( add_to_buf, &buf, 0, 10, 1, (ULong)pid );
(void)myvprintf_str ( add_to_buf, &buf, 0, 1, ":", False );
(void)myvprintf_int64 ( add_to_buf, &buf, 0, 10, 1, (ULong)level );
(void)myvprintf_str ( add_to_buf, &buf, 0, 1, ":", False );
(void)myvprintf_str ( add_to_buf, &buf, 0, 8, (HChar*)modulename, False );
(void)myvprintf_str ( add_to_buf, &buf, 0, indent, "", False );
va_start(vargs,format);
ret = VG_(debugLog_vprintf) ( add_to_buf, &buf, format, vargs );
if (buf.n > 0) {
emit( buf.buf, local_strlen(buf.buf) );
}
va_end(vargs);
}
/*--------------------------------------------------------------------*/
/*--- end m_debuglog.c ---*/
/*--------------------------------------------------------------------*/
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