diff options
Diffstat (limited to 'gdb/NEWS')
| -rw-r--r-- | gdb/NEWS | 26 |
1 files changed, 26 insertions, 0 deletions
@@ -23,6 +23,32 @@ set debug separate-debug-file show debug separate-debug-file Control the display of debug output about separate debug file search. +* Safer/improved support for debugging with no debug info + + GDB no longer assumes functions with no debug information + information return 'int'. + + This means that GDB now refuses the call such functions unless you + tell it the function's type, by either casting the call to the + declared return type, or by casting the function to a function + pointer of the right type, and calling that: + + (gdb) p getenv ("PATH") + 'getenv' has unknown return type; cast the call to its declared return type + (gdb) p (char *) getenv ("PATH") + $1 = 0x7fffffffe "/usr/local/bin:/"... + (gdb) p ((char * (*) (const char *)) getenv) ("PATH") + $2 = 0x7fffffffe "/usr/local/bin:/"... + + Similarly, GDB no longer assumes that global variables with no debug + info have type 'int', and refuses to print the variable's value + unless you tell it the variable's type: + + (gdb) p var + 'var' has unknown type; cast it to its declared type + (gdb) p (float) var + $3 = 3.14 + *** Changes in GDB 8.0 * GDB now supports access to the PKU register on GNU/Linux. The register is |