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author | A. Wilcox <awilcox@wilcox-tech.com> | 2018-02-01 22:05:36 +0000 |
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committer | A. Wilcox <awilcox@wilcox-tech.com> | 2018-02-01 22:05:36 +0000 |
commit | 88815225fdabe7fa862f1c07abfcc971fdf5b04e (patch) | |
tree | 7aaae7c04fcf06aea85505fc028f476a131b9c50 /libgcompat/backtrace.c | |
parent | c545f7393f0a10c182c2c085a36d7099b9c07a7f (diff) | |
parent | 78722ef403ffadcb78917e93e1859d43b9bf9df5 (diff) | |
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Merge branch 'patch-1' into 'master'
Clean up everything and add lots of new functions
I hope everything here is okay. I fixed some bugs in existing functions (mostly wrong prototypes or off-by-one errors) and formatted everything to a consistent style. If you'd like me to adjust the style, that's no problem. It wasn't very consistent to start with (within the code, and compared to the documentation).
*I added specific notes you may want to comment on to some of the commit messages.*
Major features:
* Pass correct `argv[0]` in loader
* Intercept `readlink("/proc/self/exe")` to allow re-exec
* Add almost all reasonable-to-implement functions in LSB 5.0.0 core generic libc. Remaining functions are:
- Impossible-to-implement: sigreturn
- Not useful: reentrant random (`*rand48_r`, etc.), argz, envz, pmap, rpc (clnt_*, svc*, xdr*), bindresvport
- Got tired of it: checked wchar
* Add additional functions used by android and its NDK tools (clang, cmake, lldb, ninja, etc.).
At this point, I am able to run Android Studio with the bundled prebuilt JDK, and compile, install, and run an android application (including one with native libraries) on a real device, with only a few minor issues:
* must export `LD_LIBRARY_PATH=/opt/android-studio/jre/jre/lib/amd64/server` because musl and glibc interpret the variable differently with regards to `dlopen`. This is something that has to be patched in musl builds of openjdk, so it's not a gcompat issue.
* ld.bfd fails to parse the argument `--sysroot=/path`, but can parse `--sysroot /path`. So there's some difference with `getopt_long_only` (or getopt in general). May be a bug, may be just an API difference. May be it can be patched up.
* LLDB fails to connect to the android phone for native debugging -- I haven't tried it on glibc yet, so it may not be a gcompat issue at all (may be a phone or the app issue).
I'd be happy to send some documentation later.
See merge request !1
Diffstat (limited to 'libgcompat/backtrace.c')
-rw-r--r-- | libgcompat/backtrace.c | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/libgcompat/backtrace.c b/libgcompat/backtrace.c deleted file mode 100644 index 2ceb334..0000000 --- a/libgcompat/backtrace.c +++ /dev/null @@ -1,44 +0,0 @@ -#include <dlfcn.h> -#include <stddef.h> -#include <stdlib.h> - -#define _frame_level(addr_buf, curr, frame, size) \ - if(__builtin_frame_address(frame) != NULL && (curr = __builtin_return_address(frame)) > 0x1000 && frame <= size) addr_buf[frame] = curr; \ - else return size; - -int backtrace(void **addr_buf, int size) -{ - void *curr; - _frame_level(addr_buf, curr, 0, size) - _frame_level(addr_buf, curr, 1, size) - _frame_level(addr_buf, curr, 2, size) - _frame_level(addr_buf, curr, 3, size) - _frame_level(addr_buf, curr, 4, size) - _frame_level(addr_buf, curr, 5, size) - _frame_level(addr_buf, curr, 6, size) - _frame_level(addr_buf, curr, 7, size) - _frame_level(addr_buf, curr, 8, size) - _frame_level(addr_buf, curr, 9, size) - return 9; -} - -char **backtrace_symbols(void * const *addr_buf, int size) -{ - char **result = calloc(sizeof(char *), size); - if(result == NULL) return result; - - for(int next = 0; next < size; next++) - { - Dl_info info; - int err = dladdr(addr_buf[next], &info); - - if(err != 0) - { - result[next] = "??:0"; - } else { - result[next] = info.dli_sname; - } - } - - return result; -} |