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move calc_expression() & get_value() from context to DWARF stack

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nnosov
2020-01-14 12:21:00 +04:00
parent 5ee3935dc2
commit fc6a81b460
6 changed files with 344 additions and 337 deletions
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framework/common.h
-98
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@@ -8,101 +8,6 @@
#include "logger/log.h"
#include "linkedlist.h"
typedef enum {
DWARF_TYPE_INVALID = 0, // no type
DWARF_TYPE_SIGNED = 1, // signed type
DWARF_TYPE_UNSIGNED = 2, // unsigned type
DWARF_TYPE_CONST = 4, // constant signed/unsigned type
DWARF_TYPE_GENERIC = 8, // size of machine address type
DWARF_TYPE_CHAR = 16, // 1 byte size
DWARF_TYPE_FLOAT = 32, // machine-dependent floating point size
DWARF_TYPE_REGISTER_LOC = 64, // value located in register specified as 'value'
DWARF_TYPE_MEMORY_LOC = 128, // value located in memory address specified as 'value'
DWARF_TYPE_PIECE = 256, // piece of whole value located in current value
DWARF_TYPE_SHORT = 512, // 2 byte size
DWARF_TYPE_INT = 1024, // 4 byte size
DWARF_TYPE_LONG = 2048 // 8 byte size
} dwarf_value_type;
typedef struct __dwarf_value : public SC_ListNode {
__dwarf_value(char*v, uint32_t s, int t)
{
size = s;
value = (char*)malloc(s);
memcpy(value, v, s);
type = t;
}
~__dwarf_value()
{
if(value) {
free(value);
value = NULL;
size = 0;
}
}
void replace(void* v, uint32_t s, int t)
{
if(value) {
free(value);
size = 0;
type = DWARF_TYPE_INVALID;
}
value = (char*)malloc(s);
memcpy(value, v, s);
size = s;
type = t;
}
bool get_uint(uint64_t& v);
bool get_int(int64_t& v);
bool get_generic(uint64_t& v);
char* value;
uint32_t size; // size in bytes except of 'DWARF_TYPE_PIECE', in such case in bits
int type; // bitmask of DWARF_TYPE_XXX
} dwarf_value;
typedef struct __dwarf_stack : public SC_ListHead {
void clear() {
for(dwarf_value* v = (dwarf_value*)First(); v; v = (dwarf_value*)First()) {
Remove(v);
delete v;
}
}
void push(void* v, uint32_t s, int t) {
dwarf_value* value = new dwarf_value((char*)v, s, t);
InsertFirst(value);
}
void push(dwarf_value* value) {
InsertFirst(value);
}
dwarf_value* pop() {
dwarf_value* value = (dwarf_value*)First();
if(value) {
Remove(value);
}
return value;
}
dwarf_value* get(uint32_t idx = 0) {
dwarf_value* value = NULL;
for(value = (dwarf_value*)First(); value && idx; value = (dwarf_value*)Next(value)) {
idx--;
}
return value;
}
Dwarf_Attribute* attr; // attribute which expression currently processed
} dwarf_stack;
typedef struct __pst_context {
__pst_context(ucontext_t* hctx) : hcontext(hctx)
{
@@ -114,13 +19,10 @@ typedef struct __pst_context {
bool print(const char* fmt, ...);
void log(SC_LogSeverity severity, const char*fmt, ...);
uint32_t print_expr_block(Dwarf_Op *exprs, int len, char* buff, uint32_t buff_size, Dwarf_Attribute* attr = 0);
bool calc_expression(Dwarf_Op *exprs, int expr_len, Dwarf_Attribute* attr);
bool get_value(uint64_t& value);
ucontext_t* hcontext; // context of signal handler
unw_context_t context; // context of stack trace
unw_cursor_t cursor; // currently examined frame of context
dwarf_stack stack;
Dwarf_Addr base_addr; // base address where process loaded
char buff[8192]; // stack trace buffer