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all code except of pst_function & pst_handler rewritten on C language.

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Logger nad Allocator decided to be a global for all library
This commit is contained in:
nnosov
2020-02-01 15:19:55 +04:00
parent fcdb15ba95
commit 8251ba526f
30 changed files with 2073 additions and 2068 deletions
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framework/context.cpp
+99 -55
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@@ -13,140 +13,184 @@
#include "dwarf_operations.h"
extern SC_LogBase* logger;
extern dwarf_reg_map reg_map[];
extern int regnum;
void __pst_context::print_stack(int max, uint64_t next_cfa)
pst_log logger; // logger for library
void clean_print(pst_context* ctx) {
ctx->buff[0] = 0;
ctx->offset = 0;
}
void print_stack(pst_context* ctx, int max, uint64_t next_cfa)
{
log(SEVERITY_DEBUG, "CFA = %#lX, NEXT_CFA = %#lX, SP = %#lX", cfa, next_cfa, sp);
clean_print();
ctx->log(SEVERITY_DEBUG, "CFA = %#lX, NEXT_CFA = %#lX, SP = %#lX", ctx->cfa, next_cfa, ctx->sp);
ctx->clean_print(ctx);
int i = 0;
if(cfa > sp) {
print("Args: ");
for(; i < max && (cfa - i) > sp; ++i) {
print("#%d 0x%lX ", i, *(uint64_t*)(cfa - i));
if(ctx->cfa > ctx->sp) {
ctx->print(ctx, "Args: ");
for(; i < max && (ctx->cfa - i) > ctx->sp; ++i) {
ctx->print(ctx, "#%d 0x%lX ", i, *(uint64_t*)(ctx->cfa - i));
}
}
if((cfa - i) > next_cfa) {
print("Vars: ");
for(; i < max && (cfa - i) > next_cfa; ++i) {
print("#%d 0x%lX ", i, *(uint64_t*)(cfa - i));
if((ctx->cfa - i) > next_cfa) {
ctx->print(ctx, "Vars: ");
for(; i < max && (ctx->cfa - i) > next_cfa; ++i) {
ctx->print(ctx, "#%d 0x%lX ", i, *(uint64_t*)(ctx->cfa - i));
}
}
}
void __pst_context::print_registers(int from, int to)
void print_registers(pst_context* ctx, int from, int to)
{
clean_print();
ctx->clean_print(ctx);
for(int i = from; i < regnum && i <= to; ++i) {
unw_word_t regval;
if(!unw_get_reg(curr_frame, reg_map[i].regno, &regval)) {
print("%s: %#lX ", reg_map[i].regname, regval);
if(!unw_get_reg(ctx->curr_frame, reg_map[i].regno, &regval)) {
ctx->print(ctx, "%s: %#lX ", reg_map[i].regname, regval);
} else {
print("%s: <undef>", reg_map[i].regname);
ctx->print(ctx, "%s: <undef>", reg_map[i].regname);
}
}
}
bool __pst_context::print(const char* fmt, ...)
bool print(pst_context* ctx, const char* fmt, ...)
{
bool nret = true;
va_list args;
va_start(args, fmt);
int size = sizeof(buff) - offset;
int ret = vsnprintf(buff + offset, size, fmt, args);
int size = sizeof(ctx->buff) - ctx->offset;
int ret = vsnprintf(ctx->buff + ctx->offset, size, fmt, args);
if(ret >= size || ret < 0) {
nret = false;
}
offset += ret;
ctx->offset += ret;
va_end(args);
return nret;
}
void __pst_context::log(SC_LogSeverity severity, const char* fmt, ...)
void log(SC_LogSeverity severity, const char* fmt, ...)
{
uint32_t str_len = 0;
char str[PATH_MAX]; str[0] = 0;
va_list args;
va_start(args, fmt);
str_len += vsnprintf(str + str_len, sizeof(str) - str_len, fmt, args);
va_end(args);
logger->Log(severity, "%s", str);
logger.log(&logger, severity, fmt);
}
uint32_t __pst_context::print_expr_block (Dwarf_Op *exprs, int len, char* buff, uint32_t buff_size, Dwarf_Attribute* attr)
bool print_expr_block (pst_context* ctx, Dwarf_Op *exprs, int exprlen, Dwarf_Attribute* attr)
{
uint32_t offset = 0;
for (int i = 0; i < len; i++) {
//printf ("%s", (i + 1 < len ? ", " : ""));
ctx->clean_print(ctx);
for (int i = 0; i < exprlen; i++) {
const dwarf_op_map* map = find_op_map(exprs[i].atom);
if(map) {
if(map->op_num >= DW_OP_breg0 && map->op_num <= DW_OP_breg16) {
int32_t off = decode_sleb128((unsigned char*)&exprs[i].number);
int regno = map->op_num - DW_OP_breg0;
unw_word_t ptr = 0;
unw_get_reg(curr_frame, regno, &ptr);
//ptr += off;
unw_get_reg(ctx->curr_frame, regno, &ptr);
offset += snprintf(buff + offset, buff_size - offset, "%s(*%s%s%d) reg_value: 0x%lX", map->op_name, unw_regname(regno), off >=0 ? "+" : "", off, ptr);
ctx->print(ctx, "%s(*%s%s%d) reg_value: 0x%lX", map->op_name, unw_regname(regno), off >=0 ? "+" : "", off, ptr);
} else if(map->op_num >= DW_OP_reg0 && map->op_num <= DW_OP_reg16) {
unw_word_t value = 0;
int regno = map->op_num - DW_OP_reg0;
unw_get_reg(curr_frame, regno, &value);
offset += snprintf(buff + offset, buff_size - offset, "%s(*%s) value: 0x%lX", map->op_name, unw_regname(regno), value);
unw_get_reg(ctx->curr_frame, regno, &value);
ctx->print(ctx, "%s(*%s) value: 0x%lX", map->op_name, unw_regname(regno), value);
} else if(map->op_num == DW_OP_GNU_entry_value) {
if(!attr) {
ctx->log(SEVERITY_ERROR, "No attribute of DW_OP_GNU_entry_value provided");
return false;
}
uint32_t value = decode_uleb128((unsigned char*)&exprs[i].number);
offset += snprintf(buff + offset, buff_size - offset, "%s(%u, ", map->op_name, value);
ctx->print(ctx, "%s(%u, ", map->op_name, value);
Dwarf_Attribute attr_mem;
if(!dwarf_getlocation_attr(attr, exprs, &attr_mem)) {
Dwarf_Op *expr;
size_t exprlen;
if (dwarf_getlocation(&attr_mem, &expr, &exprlen) == 0) {
offset += print_expr_block (expr, exprlen, buff + offset, buff_size - offset, &attr_mem);
offset += snprintf(buff + offset, buff_size - offset, ") ");
ctx->print_expr(ctx, expr, exprlen, &attr_mem);
ctx->print(ctx, ") ");
} else {
log(SEVERITY_ERROR, "Failed to get DW_OP_GNU_entry_value attr location");
ctx->log(SEVERITY_ERROR, "Failed to get DW_OP_GNU_entry_value attr location");
return false;
}
} else {
log(SEVERITY_ERROR, "Failed to get DW_OP_GNU_entry_value attr expression");
ctx->log(SEVERITY_ERROR, "Failed to get DW_OP_GNU_entry_value attr expression");
return false;
}
} else if(map->op_num == DW_OP_stack_value) {
offset += snprintf(buff + offset, buff_size - offset, "%s", map->op_name);
ctx->print(ctx, "%s", map->op_name);
} else if(map->op_num == DW_OP_plus_uconst) {
uint32_t value = decode_uleb128((unsigned char*)&exprs[i].number);
offset += snprintf(buff + offset, buff_size - offset, "%s(+%u) ", map->op_name, value);
ctx->print(ctx, "%s(+%u) ", map->op_name, value);
} else if(map->op_num == DW_OP_bregx) {
uint32_t regno = decode_uleb128((unsigned char*)&exprs[i].number);
int32_t off = decode_sleb128((unsigned char*)&exprs[i].number2);
unw_word_t ptr = 0;
unw_get_reg(curr_frame, regno, &ptr);
unw_get_reg(ctx->curr_frame, regno, &ptr);
//ptr += off;
offset += snprintf(buff + offset, buff_size - offset, "%s(%s%s%d) reg_value = 0x%lX", map->op_name, unw_regname(regno), off >= 0 ? "+" : "", off, ptr);
ctx->print(ctx, "%s(%s%s%d) reg_value = 0x%lX", map->op_name, unw_regname(regno), off >= 0 ? "+" : "", off, ptr);
} else if(map->op_num == DW_OP_regx) {
int32_t reg = decode_sleb128((unsigned char*)&exprs[i].number);
unw_word_t value = 0;
unw_get_reg(curr_frame, reg, &value);
unw_get_reg(ctx->curr_frame, reg, &value);
offset += snprintf(buff + offset, buff_size - offset, "%s(%s) value = 0x%lX", map->op_name, unw_regname(reg), value);
ctx->print(ctx, "%s(%s) value = 0x%lX", map->op_name, unw_regname(reg), value);
} else if(map->op_num == DW_OP_addr) {
offset += snprintf(buff + offset, buff_size - offset, "%s value = %p", map->op_name, (void*)exprs[i].number);
ctx->print(ctx, "%s value = %p", map->op_name, (void*)exprs[i].number);
} else if(map->op_num == DW_OP_fbreg) {
int32_t off = decode_sleb128((unsigned char*)&exprs[i].number);
offset += snprintf(buff + offset, buff_size - offset, "%s(SP%s%d) ", map->op_name, off >=0 ? "+" : "", off);
ctx->print(ctx, "%s(SP%s%d) ", map->op_name, off >=0 ? "+" : "", off);
} else {
offset += snprintf(buff + offset, buff_size - offset, "%s(0x%lX, 0x%lx) ", map->op_name, exprs[i].number, exprs[i].number2);
ctx->print(ctx, "%s(0x%lX, 0x%lx) ", map->op_name, exprs[i].number, exprs[i].number2);
}
} else {
offset += snprintf(buff + offset, buff_size - offset, "0x%hhX(0x%lX, 0x%lx)", exprs[i].atom, exprs[i].number, exprs[i].number2);
ctx->print(ctx, "0x%hhX(0x%lX, 0x%lx)", exprs[i].atom, exprs[i].number, exprs[i].number2);
}
}
return offset;
return true;
}
void pst_context_init(pst_context* ctx, pst_allocator* alloc, ucontext_t* hctx)
{
// global
pst_alloc_init(&allocator);
pst_log_init_console(&logger);
// methods
ctx->clean_print = clean_print;
ctx->print = print;
ctx->log = log;
ctx->print_expr = print_expr_block;
ctx->print_registers = print_registers;
ctx->print_stack = print_stack;
// fields
ctx->hcontext = hctx;
ctx->clean_print(ctx);
ctx->base_addr = 0;
ctx->sp = 0;
ctx->cfa = 0;
ctx->curr_frame = NULL;
ctx->frame = NULL;
ctx->dwfl = NULL;
ctx->module = NULL;
}
void pst_context_fini(pst_context* ctx)
{
ctx->hcontext = NULL;
ctx->clean_print(ctx);
ctx->base_addr = 0;
ctx->sp = 0;
ctx->cfa = 0;
ctx->curr_frame = NULL;
ctx->frame = NULL;
ctx->dwfl = NULL;
ctx->module = NULL;
// global
pst_log_fini(&logger);
pst_alloc_fini(&allocator);
}