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sgs_dbgserver.c
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#include <sgs_int.h>
#include "sgs_dbgserver.h"
/*
To successfully debug recursion issues,
call stack limit must be raised
to allow execution of debug code.
*/
#ifndef SGS_DBGSRV_STACK_EXTENSION
#define SGS_DBGSRV_STACK_EXTENSION SGS_MAX_CALL_STACK_SIZE
#endif
#define DBGSRV_BREAK_THREAD_CREATE 0x0001
#define DBGSRV_BREAK_THREAD_DESTROY 0x0002
#define DBGSRV_BREAK_THREAD_PAUSE 0x0004
#define DBGSRV_BREAK_THREAD_RESUME 0x0008
#define DBGSRV_BREAK_FUNCTION_ENTER 0x0010
#define DBGSRV_BREAK_FUNCTION_EXIT 0x0020
#define DBGSRV_BREAK_FUNCTION_STEP 0x0040
#define DBGSRV_BREAK_MESSAGE 0x0080
#define DBGSRV_BREAK_NEXT_T_CREATE 0x0100
#define DBGSRV_BREAK_NEXT_T_DESTROY 0x0200
#define DBGSRV_BREAK_NEXT_T_PAUSE 0x0400
#define DBGSRV_BREAK_NEXT_T_RESUME 0x0800
#define DBGSRV_BREAK_NEXT_F_ENTER 0x1000
#define DBGSRV_BREAK_NEXT_F_EXIT 0x2000
#define DBGSRV_BREAK_NEXT_F_STEP 0x4000
#define DBGSRV_BREAK_NEXT_MESSAGE 0x8000
#define DBGSRV_BREAK_NEXT_ANY 0xff00
typedef struct dbgPosInfo
{
sgs_iFunc* func;
int line;
}
dbgPosInfo;
struct sgs_DebugServer
{
SGS_CTX;
/* callbacks */
sgs_MsgFunc pfn;
void* pctx;
sgs_HookFunc hfn;
void* hctx;
/* communication */
int firstuse;
int server_port;
sgs_MemBuf input;
/* state preservation */
int inside;
ptrdiff_t stkoff;
ptrdiff_t stksize;
/* introspection */
int maxdepth;
sgs_VarObj* obj_dbg;
sgs_VarObj* obj_vars;
sgs_VarObj* obj_rvars;
sgs_StackFrame* cur_frame;
sgs_Context* cur_thread;
/* breakpoints */
sgs_MemBuf breakpoints; /* array of dbgBreakpointInfo */
unsigned brkflags;
int brklev;
dbgPosInfo linebreak_prev;
};
typedef struct dbgBreakpointInfo
{
sgs_iStr* filename;
sgs_iStr* funcname;
int line;
}
dbgBreakpointInfo;
typedef struct dbgStateInfo
{
SGS_CTX;
int paused;
int err_type;
const char* err_message;
}
dbgStateInfo;
#define DBGSRV_MAX_CMD_NAME_LENGTH
#define DBGSRV_COMMANDS( def ) \
def( continue ) \
def( step ) \
def( istep ) \
def( quit ) \
def( abort ) \
def( breakpoint ) \
def( ebreak ) \
def( setcfg ) \
def( instruction ) \
def( where ) \
def( error ) \
def( dump ) \
def( exec ) \
def( print ) \
def( setvar ) \
def( include )
#define CID_LIST_ITEM( cmd ) DSC_ ## cmd,
#define STR_LIST_ITEM( cmd ) #cmd,
static const char* dbgsrv_command_names[] =
{
DBGSRV_COMMANDS( STR_LIST_ITEM )
};
#define DBGSRV_COMMAND_COUNT (sizeof(dbgsrv_command_names)/sizeof(dbgsrv_command_names[0]))
enum dbgsrv_command_values
{
DBGSRV_COMMANDS( CID_LIST_ITEM )
};
#define DBGSRV_ITERATE_BREAKPOINTS( D, bp ) \
{ dbgBreakpointInfo* bp = SGS_ASSUME_ALIGNED( D->breakpoints.ptr, dbgBreakpointInfo ); \
dbgBreakpointInfo* bpend = bp + D->breakpoints.size / sizeof(dbgBreakpointInfo); \
for( ; bp != bpend; ++bp )
#define DBGSRV_ITERATE_END }
/*
unused
static int dbgsrv_stricmpl( const char* str1, const char* str2low )
{
while( *str1 && *str2low )
{
if( sgs_tolower( *str1 ) != *str2low )
break;
str1++;
str2low++;
}
return sgs_tolower( *str1 ) - *str2low;
}
static int dbgsrv_getBool( const char* str )
{
if( dbgsrv_stricmpl( str, "true" ) == 0 || dbgsrv_stricmpl( str, "on" ) == 0 ) return 1;
if( dbgsrv_stricmpl( str, "false" ) == 0 || dbgsrv_stricmpl( str, "off" ) == 0 ) return 0;
return atoi( str ) != 0;
}
*/
static dbgPosInfo dbgsrv_currentPos( SGS_CTX )
{
sgs_StackFrame* sf = sgs_GetFramePtr( C, NULL, SGS_TRUE );
if( sf && sf->iptr )
{
sgs_iFunc* F = sf->func->data.F;
dbgPosInfo out = { F, sgs_func_lineinfo( F )[ sf->iptr - sgs_func_bytecode( F ) ] };
return out;
}
else
{
/* use a non-NULL pointer to trigger line break even if there is no line info here */
dbgPosInfo out = { (sgs_iFunc*) 1, 0 };
return out;
}
}
static void dbgsrv_runCode( sgs_DebugServer* D, dbgStateInfo* dsi, const char* code )
{
sgs_ParserConfig prev_pcfg, dbg_pcfg;
int i, rvc, compile_result;
SGS_CTX = dsi->C;
sgs_SizeVal ssz = sgs_StackSize( C );
sgs_GetParserConfig( C, &prev_pcfg );
dbg_pcfg = prev_pcfg;
dbg_pcfg.ident_dollar_sign = 1;
sgs_SetParserConfig( C, &dbg_pcfg );
compile_result = sgs_PushSGSFunction( C, code );
sgs_SetParserConfig( C, &prev_pcfg );
if( SGS_FAILED( compile_result ) )
{
/* error already printed here */
return;
}
/* run the code */
{
sgs_VarObj* G = C->_G;
C->_G = D->obj_rvars;
sgs_ObjSetMetaObj( C, D->obj_rvars, G );
rvc = sgs_XCall( C, 0 );
C->_G = G;
sgs_ObjSetMetaObj( C, D->obj_rvars, NULL );
}
for( i = 0; i < rvc; ++i )
{
sgs_DumpVar( C, sgs_StackItem( C, i - rvc ), D->maxdepth );
{
sgs_SizeVal bsz;
char* buf = sgs_ToStringBuf( C, -1, &bsz );
/* WP: string limit */
sgs_Write( C, buf, (size_t) bsz );
sgs_Write( C, "\n", 1 );
}
sgs_Pop( C, 1 );
}
sgs_SetStackSize( C, ssz );
}
static int dbgsrv_findCmd( sgs_DebugServer* D, const char** pcmd, const char** command_names,
const char** parse_positions, int cmd_name_count, const char* cmd_prefix )
{
int curcmd, off, endcount, match;
const char* cmd = *pcmd;
memcpy( parse_positions, command_names, sizeof(const char*) * (size_t) cmd_name_count );
off = 0;
endcount = cmd_name_count;
while( *cmd == ' ' ) cmd++;
/* iterate all commands, advance pointers if found a character match */
while( sgs_isalpha( cmd[ off ] ) )
{
endcount = 0;
for( curcmd = 0; curcmd < cmd_name_count; ++curcmd )
{
if( parse_positions[ curcmd ] - command_names[ curcmd ] == off &&
*parse_positions[ curcmd ] == cmd[ off ] )
{
parse_positions[ curcmd ]++;
match = curcmd;
endcount++;
}
}
off++;
}
*pcmd = &cmd[ off ];
if( endcount == 0 )
{
if( cmd_prefix )
sgs_ErrWritef( D->C, "Unknown subcommand of '%s'.\n", cmd_prefix );
else
sgs_ErrWritef( D->C, "Unknown command.\n" );
return -1;
}
if( endcount > 1 )
{
if( cmd_prefix )
sgs_ErrWritef( D->C, "Multiple matches for subcommand of '%s':\n", cmd_prefix );
else
sgs_ErrWritef( D->C, "Multiple matches for command:\n" );
for( curcmd = 0; curcmd < cmd_name_count; ++curcmd )
{
if( parse_positions[ curcmd ] - command_names[ curcmd ] == off )
{
sgs_ErrWritef( D->C, "- %s\n", command_names[ curcmd ] );
}
}
return -1;
}
return match;
}
static void dbgsrv_cfgBreak( sgs_DebugServer* D, const char** pcmd, int flagid )
{
static const char* prefixes[] =
{
"ebreak thread create",
"ebreak thread destroy",
"ebreak thread pause",
"ebreak thread resume",
"ebreak function enter",
"ebreak function exit",
"ebreak function step",
"ebreak message",
};
static const char* opts[] = { "off", "next", "always", "both" };
unsigned baseflag = 1U << flagid;
unsigned nextflag = baseflag << 8;
unsigned mask = baseflag | nextflag;
int which;
const char* tmp[4];
D->brkflags &= ~mask;
switch( which = dbgsrv_findCmd( D, pcmd, opts, tmp, 4, prefixes[ flagid ] ) )
{
case 0: break;
case 1: D->brkflags |= nextflag; break;
case 2: D->brkflags |= baseflag; break;
case 3: D->brkflags |= mask; break;
}
if( which >= 0 )
sgs_ErrWritef( D->C, "break on event '%s' = %s\n", prefixes[ flagid ] + 7, opts[ which ] );
}
static void dbgsrv_printCurOp( sgs_DebugServer* D, dbgStateInfo* dsi )
{
sgs_StackFrame* sf = sgs_GetFramePtr( dsi->C, NULL, SGS_TRUE );
if( sf )
{
sgs_iFunc* F;
if( sf->iptr )
{
F = sf->func->data.F;
sgs_ErrWritef( D->C, "Current instruction:\n[%08X] ", *sf->iptr );
sgsBC_DumpOpcode( D->C, sf->iptr, 1, sgs_func_bytecode( F ),
sgs_func_consts( F ), sgs_func_lineinfo( F ) );
}
else if( sf->prev && sf->prev->iptr )
{
const sgs_instr_t* ip = sf->prev->iptr;
if( ( sf->prev->flags & SGS_SF_ABORTED ) == 0 )
ip--;
F = sf->prev->func->data.F;
sgs_ErrWritef( D->C, "Current instruction (parent frame):\n[%08X] ", *ip );
sgsBC_DumpOpcode( D->C, ip, 1, sgs_func_bytecode( F ),
sgs_func_consts( F ), sgs_func_lineinfo( F ) );
}
else
sgs_ErrWritef( D->C, "Not running SGScript code.\n" );
}
else
sgs_ErrWritef( D->C, "Not running code.\n" );
}
static void dbgsrv_stackRange( SGS_CTX, sgs_StackFrame* F, sgs_SizeVal* outfirst, sgs_SizeVal* outend )
{
if( F && F->next )
{
*outfirst = F->next->stkoff / (sgs_SizeVal) sizeof( sgs_Variable );
*outend = F->next->next
? F->next->next->stkoff / (sgs_SizeVal) sizeof( sgs_Variable )
: (sgs_SizeVal)( C->stack_top - C->stack_base );
}
else
{
*outfirst = (sgs_SizeVal)( C->stack_off - C->stack_base );
*outend = (sgs_SizeVal)( C->stack_top - C->stack_base );
}
}
static void dbgsrv_dumpVar( sgs_DebugServer* D, sgs_Variable* var, int ext )
{
if( ext )
{
}
else
{
sgsVM_VarDump( D->C, var );
sgs_ErrWritef( D->C, "\n" );
}
}
static void dbgsrv_dumpRegisters( sgs_DebugServer* D, SGS_CTX, sgs_StackFrame* F, int ext )
{
sgs_SizeVal i, first, end;
dbgsrv_stackRange( C, F, &first, &end );
sgs_ErrWritef( D->C, "Registers (%s function) [%d]:%s",
F ? ( F->iptr ? "SGScript" : "C" ) : "not in a", (int) ( end - first ),
first >= end ? " none\n" : "\n" );
for( i = first; i < end; ++i )
{
sgs_ErrWritef( D->C, " #%03d: ", ( i - first ) );
dbgsrv_dumpVar( D, &C->stack_base[ i ], ext );
}
if( F && F->clsrref )
{
uint8_t* cl = (uint8_t*) F->clsrref->data;
uint8_t ci, clsrcount = (uint8_t) *SGS_ASSUME_ALIGNED( cl + sizeof(sgs_Variable), sgs_clsrcount_t );
sgs_ErrWritef( D->C, "Closures:%s", clsrcount ? "\n" : " none\n" );
for( ci = 0; ci < clsrcount; ++ci )
{
sgs_ErrWritef( D->C, " #%03d: ", ci );
dbgsrv_dumpVar( D, &F->clsrlist[ ci ]->var, ext );
}
}
else sgs_ErrWritef( D->C, "Closures: none\n" );
}
static void dbgsrv_dumpVariables( sgs_DebugServer* D, SGS_CTX, sgs_StackFrame* F, int ext, int all )
{
if( F == NULL )
{
sgs_ErrWritef( D->C, "Not in a function (no variables), dumping registers instead...\n" );
dbgsrv_dumpRegisters( D, C, F, ext );
}
else if( F->iptr == NULL )
{
sgs_ErrWritef( D->C, "This is a C function (no variables), dumping registers instead...\n" );
dbgsrv_dumpRegisters( D, C, F, ext );
}
else if( F->func->data.F->dbg_varinfo == NULL )
{
sgs_ErrWritef( D->C, "Function has no debug info (no variables), dumping registers instead...\n" );
dbgsrv_dumpRegisters( D, C, F, ext );
}
else
{
char *varinfo, *varinfoend;
uint8_t* cl;
uint8_t clsrcount;
uint32_t curinstrid, dbgvarsize;
sgs_SizeVal first, end;
dbgsrv_stackRange( C, F, &first, &end );
if( F->clsrref )
{
cl = (uint8_t*) F->clsrref->data;
clsrcount = (uint8_t) *SGS_ASSUME_ALIGNED( cl + sizeof(sgs_Variable), sgs_clsrcount_t );
}
curinstrid = F->iptr - sgs_func_bytecode( F->func->data.F );
varinfo = F->func->data.F->dbg_varinfo;
memcpy( &dbgvarsize, varinfo, sizeof(dbgvarsize) );
varinfoend = varinfo + dbgvarsize;
varinfo += sizeof(dbgvarsize);
while( varinfo < varinfoend )
{
uint32_t from, to;
int16_t pos;
uint8_t len;
memcpy( &from, varinfo, sizeof(from) );
varinfo += sizeof(from);
memcpy( &to, varinfo, sizeof(to) );
varinfo += sizeof(to);
memcpy( &pos, varinfo, sizeof(pos) );
varinfo += sizeof(pos);
memcpy( &len, varinfo, sizeof(len) );
varinfo += sizeof(len);
if( all || ( from <= curinstrid && curinstrid < to ) )
{
if( !all )
{
sgs_ErrWritef( D->C, from <= curinstrid && curinstrid < to ? ">" : " " );
}
if( pos == 0 ) sgs_ErrWritef( D->C, "[G] " );
else if( pos < 0 ) sgs_ErrWritef( D->C, "[C%d] ", -1 - pos );
else sgs_ErrWritef( D->C, "[L%d] ", pos - 1 );
sgs_ErrWrite( D->C, varinfo, len );
sgs_ErrWritef( D->C, ": " );
if( pos == 0 )
{
sgs_Variable idx, val;
sgs_InitStringBuf( C, &idx, varinfo, len );
if( sgs_GetGlobal( C, idx, &val ) )
{
dbgsrv_dumpVar( D, &val, ext );
}
sgs_Release( C, &idx );
sgs_Release( C, &val );
}
else if( pos < 0 )
{
pos = -1 - pos;
if( pos >= clsrcount )
{
sgs_ErrWritef( D->C, "<ERROR:out of range>\n" );
}
else
{
dbgsrv_dumpVar( D, &F->clsrlist[ pos ]->var, ext );
}
}
else
{
pos -= 1;
if( pos >= end - first )
{
sgs_ErrWritef( D->C, "<ERROR:out of range>\n" );
}
else
{
dbgsrv_dumpVar( D, &C->stack_base[ first + pos ], ext );
}
}
}
varinfo += len;
}
}
}
static void dbgsrv_dumpBytecode( sgs_DebugServer* D, sgs_StackFrame* F )
{
if( F && F->iptr )
{
sgsVM_DumpFunction( D->C, F->func->data.F, 0 );
}
else
{
sgs_ErrWritef( D->C, "No bytecode for C function.\n" );
}
}
static void dbgsrv_execCmd( sgs_DebugServer* D, int cmd, const char* params, dbgStateInfo* dsi )
{
D->inside = 1; /* some of these commands may produce messages */
dsi->C->sf_count -= SGS_DBGSRV_STACK_EXTENSION;
switch( cmd )
{
case DSC_continue:
sgs_ErrWritef( D->C, "Continuing...\n" );
dsi->paused = 0;
break;
case DSC_step:
sgs_ErrWritef( D->C, "Stepping to next line...\n" );
D->linebreak_prev = dbgsrv_currentPos( dsi->C );
dsi->paused = 0;
break;
case DSC_istep:
sgs_ErrWritef( D->C, "Stepping to next instruction...\n" );
D->brkflags |= DBGSRV_BREAK_NEXT_F_STEP;
dsi->paused = 0;
break;
case DSC_quit: {
int code = atoi( params );
sgs_ErrWritef( D->C, "Calling exit(%d)...\n", code );
exit( code );
} break;
case DSC_abort:
sgs_ErrWritef( D->C, "Aborting the thread...\n" );
sgs_Abort( dsi->C );
break;
case DSC_breakpoint:
/* TODO */
break;
case DSC_ebreak: {
static const char* brkevcat[] = { "thread", "function", "message" };
static const char* brkevthrtype[] = { "create", "destroy", "pause", "resume" };
static const char* brkevfunctype[] = { "enter", "exit", "step" };
const char* tmp[4];
switch( dbgsrv_findCmd( D, ¶ms, brkevcat, tmp, 3, "ebreak" ) )
{
case 0: /* thread */
switch( dbgsrv_findCmd( D, ¶ms, brkevthrtype, tmp, 4, "ebreak thread" ) )
{
case 0: dbgsrv_cfgBreak( D, ¶ms, 0 ); break;
case 1: dbgsrv_cfgBreak( D, ¶ms, 1 ); break;
case 2: dbgsrv_cfgBreak( D, ¶ms, 2 ); break;
case 3: dbgsrv_cfgBreak( D, ¶ms, 3 ); break;
}
break;
case 1: /* function */
switch( dbgsrv_findCmd( D, ¶ms, brkevfunctype, tmp, 3, "ebreak function" ) )
{
case 0: dbgsrv_cfgBreak( D, ¶ms, 4 ); break;
case 1: dbgsrv_cfgBreak( D, ¶ms, 5 ); break;
case 2: dbgsrv_cfgBreak( D, ¶ms, 6 ); break;
}
break;
case 2: /* message */
dbgsrv_cfgBreak( D, ¶ms, 7 ); break;
break;
}
} break;
case DSC_setcfg:
while( *params == ' ' ) params++;
if( strncmp( params, "dump_max_depth=", 15 ) == 0 )
{
D->maxdepth = atoi( params + 15 );
sgs_ErrWritef( D->C, "dump_max_depth=%d\n", D->maxdepth );
}
else if( strncmp( params, "break_level=", 12 ) == 0 )
{
int level = 0;
params += 12;
if( strcmp( params, "info" ) ) level = SGS_INFO;
else if( strcmp( params, "warning" ) ) level = SGS_WARNING;
else if( strcmp( params, "error" ) ) level = SGS_ERROR;
else if( strcmp( params, "apierr" ) ) level = SGS_APIERR;
else if( strcmp( params, "interr" ) ) level = SGS_INTERR;
else level = atoi( params );
D->brklev = level;
sgs_ErrWritef( D->C, "break_level=%d\n", level );
}
else
{
sgs_ErrWritef( D->C, "Unknown configuration option.\n" );
}
break;
case DSC_instruction:
dbgsrv_printCurOp( D, dsi );
break;
case DSC_where:
sgs_WriteErrorInfo( dsi->C, SGS_ERRORINFO_STACK,
(sgs_ErrorOutputFunc) sgs_ErrWritef, dsi->C, dsi->err_type, dsi->err_message );
break;
case DSC_error:
sgs_WriteErrorInfo( dsi->C, SGS_ERRORINFO_ERROR,
(sgs_ErrorOutputFunc) sgs_ErrWritef, dsi->C, dsi->err_type, dsi->err_message );
break;
case DSC_dump:
while( *params == ' ' ) params++;
{
static const char* subcmds[] = {
"stack", "globals", "objects", "frames",
"breakpoints", "registers", "bytecode",
"variables", "cvars",
};
#define DSC_DUMP_SUBCMD_COUNT (sizeof(subcmds) / sizeof(subcmds[0]))
const char* ppos[ DSC_DUMP_SUBCMD_COUNT ];
switch( dbgsrv_findCmd( D, ¶ms, subcmds, ppos, DSC_DUMP_SUBCMD_COUNT, "dump" ) )
{
case 0: sgs_Stat( dsi->C, SGS_STAT_DUMP_STACK ); break;
case 1: sgs_Stat( dsi->C, SGS_STAT_DUMP_GLOBALS ); break;
case 2: sgs_Stat( dsi->C, SGS_STAT_DUMP_OBJECTS ); break;
case 3: sgs_Stat( dsi->C, SGS_STAT_DUMP_FRAMES ); break;
case 4: {
int i = 0;
sgs_ErrWritef( D->C, "-- breakpoints --\n" );
DBGSRV_ITERATE_BREAKPOINTS( D, bp )
{
i++;
sgs_ErrWritef( D->C, "Breakpoint #%d:\n", i );
sgs_ErrWritef( D->C, " File: %s\n", bp->filename ? sgs_str_cstr( bp->filename ) : "<none>" );
sgs_ErrWritef( D->C, " Function: %s\n", bp->funcname ? sgs_str_cstr( bp->funcname ) : "<none>" );
if( bp->line >= 0 )
sgs_ErrWritef( D->C, " Line: %d\n", bp->line );
else
sgs_ErrWritef( D->C, " Line: <none>\n" );
}
DBGSRV_ITERATE_END;
}
break;
case 5:
dbgsrv_dumpRegisters( D, dsi->C, sgs_GetFramePtr( dsi->C, NULL, SGS_TRUE ), 0 );
break;
case 6:
dbgsrv_dumpBytecode( D, sgs_GetFramePtr( dsi->C, NULL, SGS_TRUE ) );
break;
case 7:
dbgsrv_dumpVariables( D, dsi->C, sgs_GetFramePtr( dsi->C, NULL, SGS_TRUE ), 0, 1 );
break;
case 8:
dbgsrv_dumpVariables( D, dsi->C, sgs_GetFramePtr( dsi->C, NULL, SGS_TRUE ), 0, 0 );
break;
}
}
break;
case DSC_exec:
dbgsrv_runCode( D, dsi, params );
break;
case DSC_print:
{
sgs_MemBuf prepstr = sgs_membuf_create();
sgs_membuf_appbuf( &prepstr, D->C, SGS_STRLITBUF( "return (" ) );
sgs_membuf_appbuf( &prepstr, D->C, params, strlen( params ) );
sgs_membuf_appbuf( &prepstr, D->C, SGS_STRLITBUF( ");" ) + 1 ); /* include \0 */
dbgsrv_runCode( D, dsi, prepstr.ptr );
sgs_membuf_destroy( &prepstr, D->C );
}
break;
case DSC_setvar:
{
sgs_MemBuf prepstr = sgs_membuf_create();
sgs_membuf_appbuf( &prepstr, D->C, SGS_STRLITBUF( "_R.$dbg.vars." ) );
sgs_membuf_appbuf( &prepstr, D->C, params, strlen( params ) );
sgs_membuf_appbuf( &prepstr, D->C, SGS_STRLITBUF( ";" ) + 1 ); /* include \0 */
dbgsrv_runCode( D, dsi, prepstr.ptr );
sgs_membuf_destroy( &prepstr, D->C );
}
break;
case DSC_include:
while( *params == ' ' ) params++;
sgs_ErrWritef( D->C, "Including '%s'...\n", params );
sgs_Include( dsi->C, params );
break;
}
dsi->C->sf_count += SGS_DBGSRV_STACK_EXTENSION;
D->inside = 0;
}
static void dbgsrv_execInputStr( sgs_DebugServer* D, dbgStateInfo* dsi )
{
size_t pos, eraseto = 0;
const char* parse_positions[ DBGSRV_COMMAND_COUNT ];
const char* cmd = D->input.ptr;
for( pos = 0; pos < D->input.size; ++pos )
{
if( D->input.ptr[ pos ] == '\n' )
{
int match;
D->input.ptr[ pos ] = '\0';
match = dbgsrv_findCmd( D, &cmd, dbgsrv_command_names,
parse_positions, DBGSRV_COMMAND_COUNT, NULL );
if( match != -1 )
{
dbgsrv_execCmd( D, match, cmd, dsi );
}
eraseto = pos + 1;
cmd = &D->input.ptr[ eraseto ];
}
}
sgs_membuf_erase( &D->input, 0, eraseto );
}
static void dbgsrv_readStdin( sgs_DebugServer* D )
{
/* read from STDIN */
#define STDIN_READ_BFR_SIZE 1024
char bfr[ STDIN_READ_BFR_SIZE ];
sgs_membuf_resize( &D->input, D->C, 0 );
while( fgets( bfr, STDIN_READ_BFR_SIZE, stdin ) )
{
size_t len = strlen( bfr );
sgs_membuf_appbuf( &D->input, D->C, bfr, len );
if( len && bfr[ len - 1 ] == '\n' )
break;
}
sgs_membuf_appchr( &D->input, D->C, 0 );
}
static void dbgsrv_interact( sgs_DebugServer* D, dbgStateInfo* dsi )
{
SGS_CTX = dsi->C;
if( D->firstuse )
{
sgs_ErrWritef( D->C, "----- Interactive SGScript Debug Inspector -----\n" );
D->firstuse = 0;
}
D->cur_thread = C;
D->cur_frame = C->sf_last;
D->stkoff = C->stack_off - C->stack_base;
D->stksize = C->stack_top - C->stack_base;
dsi->paused = 1;
while( dsi->paused )
{
sgs_ErrWritef( D->C, "\n> " );
dbgsrv_readStdin( D );
if( ferror( stdin ) )
break;
dbgsrv_execInputStr( D, dsi );
}
}
static void dbgsrv_printFunc( void* data, SGS_CTX, int type, const char* message )
{
sgs_DebugServer* D = (sgs_DebugServer*) data;
/* D->pfn( D->pctx, C, type, message ); */
sgs_WriteErrorInfo( C, SGS_ERRORINFO_FULL, (sgs_ErrorOutputFunc) sgs_ErrWritef, C, type, message );
if( D->inside || type < D->brklev )
return;
if( D->inside == 0 && type > D->brklev && SGS_HAS_FLAG( D->brkflags, DBGSRV_BREAK_MESSAGE ) )
{
dbgStateInfo dsi = { C, 1, type, message };
dbgsrv_interact( D, &dsi );
}
}
static void dbgsrv_hookFunc( void* data, SGS_CTX, int event_id )
{
sgs_DebugServer* D = (sgs_DebugServer*) data;
if( D->hfn )
D->hfn( D->hctx, C, event_id );
/* invalidate selection */
if( D->cur_frame )
{
if( event_id == SGS_HOOK_EXIT )
{
if( D->cur_frame == C->sf_last )
D->cur_frame = D->cur_frame->prev;
}
}
if( D->cur_thread )
{
if( event_id == SGS_HOOK_CFREE )
{
if( D->cur_thread == C )
{
if( C->parent )
D->cur_thread = C->parent;
else
D->cur_thread = sgs_RootContext( C );
}
}
}
/* break on events */
if( D->inside == 0 )
{
if( event_id == SGS_HOOK_ENTER )
{
if( D->brkflags & (DBGSRV_BREAK_FUNCTION_ENTER|DBGSRV_BREAK_NEXT_F_ENTER) )
{
dbgStateInfo dsi = { C, 1, 0, "Entered function" };
D->brkflags &= ~(uint32_t)DBGSRV_BREAK_NEXT_F_ENTER;
dbgsrv_interact( D, &dsi );
}
}
else if( event_id == SGS_HOOK_EXIT )
{
if( D->brkflags & (DBGSRV_BREAK_FUNCTION_EXIT|DBGSRV_BREAK_NEXT_F_EXIT) )
{
dbgStateInfo dsi = { C, 1, 0, "Exited function" };
D->brkflags &= ~(uint32_t)DBGSRV_BREAK_NEXT_F_EXIT;
dbgsrv_interact( D, &dsi );
}
}
else if( event_id == SGS_HOOK_STEP )
{
if( D->brkflags & (DBGSRV_BREAK_FUNCTION_STEP|DBGSRV_BREAK_NEXT_F_STEP) )
{
dbgStateInfo dsi = { C, 1, 0, "Reached next instruction" };
D->brkflags &= ~(uint32_t)DBGSRV_BREAK_NEXT_F_STEP;
dbgsrv_printCurOp( D, &dsi );
dbgsrv_interact( D, &dsi );
}
else if( D->linebreak_prev.func )
{
dbgPosInfo cp = dbgsrv_currentPos( C );
if( D->linebreak_prev.func != cp.func || D->linebreak_prev.line != cp.line )
{
dbgStateInfo dsi = { C, 1, 0, "Reached next line" };
D->linebreak_prev.func = NULL;
dbgsrv_printCurOp( D, &dsi ); /* TODO print source line */
dbgsrv_interact( D, &dsi );
}
}
}
}
}
static sgs_ObjProp dbgsrv_oi_props[] =
{
SGS_OBJPROP_OFFSET( "vars", offsetof( sgs_DebugServer, obj_vars ), SGS_OBJPROPTYPE_VAROBJ, SGS_OBJPROP_NOWRITE ),
SGS_OBJPROP_OFFSET( "rvars", offsetof( sgs_DebugServer, obj_rvars ), SGS_OBJPROPTYPE_VAROBJ, SGS_OBJPROP_NOWRITE ),
SGS_OBJPROP_END(),
};
static sgs_ObjInterface dbgsrv_oi_dbg[1] =
{{
"DBGSRV",
NULL, NULL,
NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL,
dbgsrv_oi_props
}};
static int dbgsrv_vars_index( SGS_CTX, sgs_VarObj* obj, int write )
{
char* varname;
sgs_SizeVal varnamesize;
sgs_DebugServer* D = (sgs_DebugServer*) obj->data;
if( sgs_ParseString( C, 0, &varname, &varnamesize ) )
{
sgs_StackFrame* F = D->cur_frame;
if( F && F->iptr != NULL && F->func->data.F->dbg_varinfo != NULL )
{
char *varinfo, *varinfoend;
uint8_t* cl;
uint8_t clsrcount;
uint32_t curinstrid, dbgvarsize;
sgs_SizeVal first, end;
dbgsrv_stackRange( C, F, &first, &end );
if( F->clsrref )
{
cl = (uint8_t*) F->clsrref->data;
clsrcount = (uint8_t) *SGS_ASSUME_ALIGNED( cl + sizeof(sgs_Variable), sgs_clsrcount_t );
}
curinstrid = F->iptr - sgs_func_bytecode( F->func->data.F );
varinfo = F->func->data.F->dbg_varinfo;
memcpy( &dbgvarsize, varinfo, sizeof(dbgvarsize) );
varinfoend = varinfo + dbgvarsize;
varinfo += sizeof(dbgvarsize);
while( varinfo < varinfoend )
{
uint32_t from, to;
int16_t pos;
uint8_t len;
memcpy( &from, varinfo, sizeof(from) );
varinfo += sizeof(from);
memcpy( &to, varinfo, sizeof(to) );
varinfo += sizeof(to);
memcpy( &pos, varinfo, sizeof(pos) );
varinfo += sizeof(pos);
memcpy( &len, varinfo, sizeof(len) );
varinfo += sizeof(len);
if( from <= curinstrid && curinstrid < to )
{
if( len == varnamesize && memcmp( varinfo, varname, len ) == 0 )
{
if( pos == 0 )
{
sgs_Variable idx, val;
sgs_InitStringBuf( C, &idx, varinfo, len );
if( write )
{
sgs_SetGlobal( C, idx, sgs_StackItem( C, 1 ) );
}
else if( sgs_GetGlobal( C, idx, &val ) )
{
sgs_PushVariable( C, val );
}
else
{
sgs_Msg( C, SGS_ERROR, "referenced global variable is not defined" );
}
sgs_Release( C, &idx );
sgs_Release( C, &val );
return SGS_SUCCESS;
}
else if( pos < 0 )
{
pos = -1 - pos;
if( pos >= clsrcount )
{
return sgs_Msg( C, SGS_ERROR, "variable index in debug info is out of range" );
}
else
{
if( write )
{
sgs_Assign( C, &F->clsrlist[ pos ]->var, stk_poff( C, 1 ) );
return SGS_SUCCESS;
}
else
return sgs_PushVariable( C, F->clsrlist[ pos ]->var );
}
}
else
{
pos -= 1;
if( pos >= end - first )
{
return sgs_Msg( C, SGS_ERROR, "variable index in debug info is out of range" );
}
else
{
if( write )
{
sgs_Assign( C, &C->stack_base[ first + pos ], stk_poff( C, 1 ) );
return SGS_SUCCESS;
}
else
return sgs_PushVariable( C, C->stack_base[ first + pos ] );
}
}
}
}
varinfo += len;
}
}
}
return SGS_ENOTFND;
}
static int dbgsrv_vars_getindex( SGS_CTX, sgs_VarObj* obj )
{
return dbgsrv_vars_index( C, obj, 0 );
}
static int dbgsrv_vars_setindex( SGS_CTX, sgs_VarObj* obj )
{
return dbgsrv_vars_index( C, obj, 1 );
}
static sgs_ObjInterface dbgsrv_oi_vars[1] =
{{
"DBGSRV_VARS",
NULL, NULL,
dbgsrv_vars_getindex, dbgsrv_vars_setindex,
NULL, NULL, NULL, NULL,
NULL, NULL,
NULL,
}};