move pst_context to separate files

framework/context.h

@@ -0,0 +1,66 @@
+/*
+ * context.h
+ *
+ *  Created on: Jan 28, 2020
+ *      Author: nnosov
+ */
+
+#ifndef FRAMEWORK_CONTEXT_H_
+#define FRAMEWORK_CONTEXT_H_
+
+#include <string.h>
+#include <stdlib.h>
+#include <execinfo.h>
+#include <libunwind.h>
+#include <elfutils/libdwfl.h>
+
+#include "logger/log.h"
+
+typedef struct __pst_context {
+    __pst_context(ucontext_t* hctx) : hcontext(hctx)
+    {
+        clean_print();
+        base_addr = 0;
+        sp = 0;
+        cfa = 0;
+        curr_frame = NULL;
+        next_frame = NULL;
+        frame = NULL;
+        dwfl = NULL;
+        module = NULL;
+    }
+
+    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);
+    void print_registers(int from, int to);
+    void print_stack(int max, uint64_t next_cfa);
+    void clean_print() {
+        buff[0] = 0;
+        offset = 0;
+    }
+
+    const char* get_print() {
+        return buff;
+    }
+
+    ucontext_t*                 hcontext;   // context of signal handler
+    unw_context_t               context;    // context of stack trace
+    unw_cursor_t                cursor;
+    unw_cursor_t*               curr_frame; // callee libunwind frame
+    unw_cursor_t*               next_frame; // caller libunwind frame
+    Dwarf_Addr                  base_addr;  // base address where process loaded
+
+    Dwarf_Addr                  sp;
+    Dwarf_Addr                  cfa;
+    Dwarf_Frame*                frame;      // currently examined libdwfl frame
+    Dwfl*                       dwfl;       // DWARF context
+    Dwfl_Module*                module;     // currently processed CU
+
+protected:
+    char                        buff[8192]; // stack trace buffer
+    uint32_t                    offset;     // offset in the 'buff'
+} pst_context;
+
+
+#endif /* FRAMEWORK_CONTEXT_H_ */