StackTrace.h File Reference

function for printing out a stack trace Note that we need to pass -rdynamic to the linker to be able to see the function names with these functios. More...

#include <cpn/common.h>
#include <string>

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Macros
#define	STACKTRACE_MAXTRACE   100

Functions
void	PrintStack ()
std::string	GetStack (unsigned ignore=0)

Detailed Description

function for printing out a stack trace Note that we need to pass -rdynamic to the linker to be able to see the function names with these functios.

Author

John Bridgman

Definition in file StackTrace.h.

Macro Definition Documentation

#define STACKTRACE_MAXTRACE   100

Definition at line 33 of file StackTrace.h.

Referenced by GetStack(), and PrintStack().

Function Documentation

std::string GetStack

(

unsigned

ignore = 0

)

Returns a std::string to the stack trace. May fail if out of memory.

Parameters

ignore

the number of top stacks to ignore. This is useful because this function is often used in error messages and it is useless garbage to report the stack from the error handler.

Definition at line 39 of file StackTrace.cc.

References STACKTRACE_MAXTRACE.

Referenced by __ASSERT().

                                    {
    void* stack[STACKTRACE_MAXTRACE];
    size_t size = backtrace(stack, STACKTRACE_MAXTRACE);
    char **bt = backtrace_symbols(stack, size);
    if (!bt) {
        perror("backtrace_symbols");
        return "";
    }
    std::ostringstream oss;
    for (unsigned i = ignore; i < size; ++i) {
        oss << bt[i] << '\n';
    }
    free(bt);
    return oss.str();
}

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void PrintStack

(

)

Prints the stack trace to stderr Should work even if we are out of memory

Definition at line 33 of file StackTrace.cc.

References STACKTRACE_MAXTRACE.

                  {
    void* stack[STACKTRACE_MAXTRACE];
    size_t size = backtrace(stack, STACKTRACE_MAXTRACE);
    backtrace_symbols_fd(stack, size, 2);
}