| // Copyright 2000 - 2007 Google Inc. |
| // All rights reserved. |
| // |
| // Produce stack trace. |
| // |
| // There are three different ways we can try to get the stack trace: |
| // |
| // 1) Our hand-coded stack-unwinder. This depends on a certain stack |
| // layout, which is used by gcc (and those systems using a |
| // gcc-compatible ABI) on x86 systems, at least since gcc 2.95. |
| // It uses the frame pointer to do its work. |
| // |
| // 2) The libunwind library. This is still in development, and as a |
| // separate library adds a new dependency, abut doesn't need a frame |
| // pointer. It also doesn't call malloc. |
| // |
| // 3) The gdb unwinder -- also the one used by the c++ exception code. |
| // It's obviously well-tested, but has a fatal flaw: it can call |
| // malloc() from the unwinder. This is a problem because we're |
| // trying to use the unwinder to instrument malloc(). |
| // |
| // Note: if you add a new implementation here, make sure it works |
| // correctly when GetStackTrace() is called with max_depth == 0. |
| // Some code may do that. |
| |
| #include "config.h" |
| |
| // First, the i386 case. |
| #if defined(__i386__) && __GNUC__ >= 2 |
| # if defined(HAVE_EXECINFO_H) |
| # include "stacktrace_generic-inl.h" |
| # elif !defined(NO_FRAME_POINTER) |
| # include "stacktrace_x86-inl.h" |
| # endif |
| |
| // Now, the x86_64 case. |
| #elif defined(__x86_64__) && __GNUC__ >= 2 |
| # if defined(HAVE_EXECINFO_H) |
| # include "stacktrace_generic-inl.h" |
| # elif !defined(NO_FRAME_POINTER) |
| # include "stacktrace_x86-inl.h" |
| # elif 1 |
| // This is the unwinder used by gdb, which can call malloc (see above). |
| # include "stacktrace_x86_64-inl.h" |
| # elif 0 // We assume libunwind is installed on this machine |
| // Use the libunwind library. |
| // There's no way to enable it except for manually |
| // editing this file (by replacing this "elif 0" with "elif 1", e.g.). |
| # define UNW_LOCAL_ONLY |
| # include "stacktrace_libunwind-inl.h" |
| # elif defined(__linux) |
| # error Cannnot calculate stack trace: need either libunwind or frame-pointers |
| # else |
| # error Cannnot calculate stack trace: need libunwind |
| # endif |
| |
| // The PowerPC case |
| #elif (defined(__ppc__) || defined(__PPC__)) && __GNUC__ >= 2 |
| # if defined(HAVE_EXECINFO_H) |
| # include "stacktrace_generic-inl.h" |
| # elif defined(STACKTRACE_WITH_FRAME_POINTER) |
| # include "stacktrace_powerpc-inl.h" |
| # endif |
| |
| // OK, those are all the processors we know how to deal with. |
| #else |
| # error Cannot calculate stack trace: will need to write for your environment |
| #endif |
