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Clean up abort.

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* A dlmalloc usage error shouldn't call abort(3) because we want to
  cause a SIGSEGV by writing the address dlmalloc didn't like to an
  address the kernel won't like, so that debuggerd will dump the
  memory around the address that upset dlmalloc.

* Switch to the simpler FreeBSD/NetBSD style of registering stdio
  cleanup. Hopefully this will let us simplify more of the stdio
  implementation.

* Clear the stdio cleanup handler before we abort because of a dlmalloc
  corruption error. This fixes the reported bug, where we'd hang inside
  dlmalloc because the stdio cleanup reentered dlmalloc.

Bug: 9301265
Change-Id: Ief31b389455d6876e5a68f0f5429567d37277dbc
This commit is contained in:
Elliott Hughes
2013-06-12 14:05:46 -07:00
parent 5cde15eb17
commit 61e699a133
10 changed files with 67 additions and 108 deletions
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5
libc/stdio/local.h
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@@ -58,7 +58,10 @@ int __swsetup(FILE *);
int __sflags(const char *, int *);
int __vfprintf(FILE *, const char *, __va_list);
extern void __atexit_register_cleanup(void (*)(void));
/*
* Function to clean up streams, called from abort() and exit().
*/
extern void (*__cleanup)(void);
extern int __sdidinit;
/*