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extract context from handler and move it to common. define functions to

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use in calculation of DWARF expressions
This commit is contained in:
nnosov
2020-01-11 14:56:45 +04:00
parent 18b8b37ca3
commit 58f14a695d
9 changed files with 688 additions and 267 deletions
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framework/sysutils.h
+23 -30
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@@ -21,18 +21,21 @@
#include <elfutils/libdwfl.h>
#include <dlfcn.h>
#include "common.h"
char* GetExecutableName(char* path, uint32_t size);
typedef struct __pst_function pst_function;
typedef struct __pst_parameter {
__pst_parameter(pst_function* fun) : function(fun)
__pst_parameter(pst_context* c) : ctx(c)
{
die = NULL;
size = 0;
type = 0;
loc = NULL;
is_return = false;
value = 0;
}
bool handle_dwarf(Dwarf_Die* d);
@@ -42,13 +45,14 @@ typedef struct __pst_parameter {
std::string name; // parameter's name
Dwarf_Word size; // size of parameter in bytes
int type; // base type of parameter in DW_TAG_XXX types enumeration
std::vector<std::string> types; // list of parameters definitions i.e. 'typedef', 'uint32_t'
std::vector<std::string> types; // list of parameter's definitions i.e. 'typedef', 'uint32_t'
void* loc; // pointer to location of parameter's value
bool is_return; // whether this parameter is return value of the function
pst_function* function;
uint64_t value; // value of parameter
pst_context* ctx;
} pst_parameter;
typedef struct __pst_context pst_context;
typedef struct __pst_handler pst_handler;
typedef struct __pst_function {
__pst_function(pst_context* ctx) : ctx(ctx)
@@ -57,12 +61,14 @@ typedef struct __pst_function {
line = -1;
die = NULL;
lowpc = 0;
highpc = 0;
}
bool unwind(Dwfl* dwfl, Dwfl_Module* module, Dwarf_Addr addr);
bool handle_dwarf(Dwarf_Die* d);
Dwarf_Addr lowpc;
Dwarf_Addr highpc;
Dwarf_Die* die; // DWARF DIE containing definition of the function
std::string name; // function's name
std::vector<pst_parameter> params; // array of function's parameters
@@ -72,21 +78,18 @@ typedef struct __pst_function {
pst_context* ctx;
} pst_function;
typedef struct __pst_context {
__pst_context(ucontext_t* hctx) : hcontext(hctx)
typedef struct __pst_handler {
__pst_handler(ucontext_t* hctx) : ctx(hctx)
{
caller = NULL;
module = NULL;
dwfl = NULL;
offset = 0;
buff[0] = 0;
frame = NULL;
addr = 0;
base_addr = 0;
handle = 0;
}
~__pst_context()
~__pst_handler()
{
if(handle) {
dlclose(handle);
@@ -94,30 +97,20 @@ typedef struct __pst_context {
}
bool print(const char* fmt, ...);
void dwarf_print();
uint32_t print_expr_block(Dwarf_Op *exprs, int len, char* buff, uint32_t buff_size, Dwarf_Attribute* attr = 0);
void log(SC_LogSeverity severity, const char*fmt, ...);
bool calc_expr_block(Dwarf_Op *exprs, int exp_len, dwarf_stack* stack, Dwarf_Attribute* attr = 0);
bool unwind();
bool get_frame();
bool get_dwarf_function(pst_function& fun);
ucontext_t* hcontext;// context of signal handler
unw_context_t context;// context of stack trace
unw_cursor_t cursor; // currently examined frame of context
void* handle; // process handle
Dwarf_Addr addr; // address of currently processed function
Dwarf_Addr base_addr;// base address where process loaded
Dwfl* dwfl; // DWARF context
Dwfl_Module* module; // currently processed CU
Dwarf_Frame* frame; // currently processed stack frame
void* caller; // pointer to the function which requested to unwind stack
std::vector<pst_function> functions;// array of functions in stack frame
char buff[8192]; // stack trace buffer
uint32_t offset; // offset in the 'buff'
} pst_context;
// libdw-based trace call stack implementation
bool LibdwTraceCallStack(pst_context& ctx);
pst_context ctx; // context of unwinding
void* handle; // process handle
Dwarf_Addr addr; // address of currently processed function
Dwfl* dwfl; // DWARF context
Dwfl_Module* module; // currently processed CU
Dwarf_Frame* frame; // currently processed stack frame
void* caller; // pointer to the function which requested to unwind stack
std::vector<pst_function> functions; // array of functions in stack frame
} pst_handler;
#endif /* SC_SYSUTILS_H_ */